PURCHASE AND SALE AGREEMENT

     This PURCHASE AND SALE AGREEMENT  ("Agreement")  is made as of September 1,
1995, by and between TESORO E&P COMPANY, L.P., a Delaware  limited  partnership,
by  and  through  its general partner, Tesoro Exploration and Production Company
("Seller"), and COASTAL OIL & GAS  OF  TEXAS, L.P., a Texas limited partnership,
by and through its general partner, Coastal Oil & Gas Corporation ("Purchaser").

                                   RECITALS:
     WHEREAS, Seller is the owner of  oil,  gas  and other minerals in and under
certain oil and gas leases  presently  being  operated  by  Coastal  Oil  &  Gas
Corporation; and

     WHEREAS,  on  the  terms  and conditions provided in this Agreement, Seller
desires to sell and Purchaser  desires  to  purchase Seller's interests in these
certain oil and gas leases  and  certain  related  agreements,  contracts,  real
property, personal property, equipment and other rights.

     NOW,  THEREFORE,  for  good  and  valuable consideration and for the mutual
covenants contained herein, Seller and Purchaser hereby agree as follows:


                         ARTICLE 1.  SALE AND PURCHASE

     1.1  Sale and Purchase.  Subject to the terms and conditions herein, Seller
shall  sell,  assign,  transfer  and  convey  to  Purchaser, and Purchaser shall
purchase and receive, the following described assets (the "Assets"):

     (a)  All  right,  title  and  interest of Seller in and to the oil, gas and
          mineral leasehold and  fee  estates  (including all working interests,
          net revenue interests, farmout and farmin  rights,  royalty  or  other
          non-working  or  carried interests, operating rights and other mineral
          rights of every nature) described in  Exhibits A-1 and A-2 hereto (the
          "Subject Properties);

     (b)  Except as excluded in Exhibit B, all  right,  title  and  interest  of
          Seller  in  and  to:   (i) all oil and gas wells, equipment, supplies,
          machinery, signage, tanks  and  all  other  real  or tangible personal
          property and fixtures, which are located on  the  Subject  Properties,
          excluding  portable  tools,  vehicles  and any other items of personal
          property temporarily located on the Subject Properties owned solely by
          Seller; (ii) all  oil,  gas  and  minerals  produced  from the Subject
          Properties on or after the Effective Time; (iii)  to  the  extent  the
          same  are  assignable  or transferable by Seller, all rights to and in
          all orders,  contracts,  title  opinions  and  documents, abstracts of
          title, leases,  deeds,  unitization  agreements,  pooling  agreements,
          operating  agreements,  division of interest statements, participation
          agreements,  and  all  other  agreements  and  instruments;  (iv)  all
          authorizations, subject to the rights  of third parties (but excluding
          all easements, rights-of-way, licenses and permits; (v) except

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          as expressly provided otherwise  herein, all warranties, covenants and
          representations from third parties, and all claims, rights and  causes
          of  action  against  third parties, asserted and unasserted, known and
          unknown; (vi) copies of all  lease  files, land files, well files, oil
          and gas sales contract files, gas  processing  files,  division  order
          files,  title  files  and materials, and all other books, files, maps,
          logs and  records  other  than  corporate,  financial,  tax  and legal
          records of Seller (the "Records"), and all rights thereto, subject  to
          the  rights  of third parties; and (vii) all other rights, privileges,
          benefits and powers conferred upon  the  owner and holder of interests
          in the Subject Properties; and

     (c)  All rights to  tax  (other  than  income  tax)  refunds,  credits  and
          exemptions,  including,  but  not  limited  to,  state  severance  tax
          exemptions  and  federal  tax credits earned pursuant to Section 29 of
          the  Internal  Revenue  Code   of   1986,   as  amended  (the  "Code")
          attributable to the Subject  Properties  for  all  periods  after  the
          Effective Time.

     1.2  Excluded Property.  All right, title and interest of the Seller in the
property described on Exhibit B is  not  included in the Assets.  Purchaser will
acquire no interest therein.

     1.3  Effective  Time.   The  effective  time  of  the  purchase  and   sale
contemplated  hereby  shall  be  7:00  a.m.   Central  Time,  April 1, 1995 (the
"Effective Time").  Seller shall be entitled  to all of the rights and incidents
of ownership generated from or attributable to the Assets prior to the Effective
Time, including the right to all oil, gas  and  other  hydrocarbons  theretofore
produced from or attributable to the Assets, and the proceeds thereof, except as
may  be otherwise provided herein.  Seller shall bear and be responsible for the
duties, liabilities, costs, expenses  and  obligations of ownership attributable
to the Assets prior to the Effective Time, except as may be  otherwise  provided
herein.

     Purchaser shall be entitled to all of the rights and incidents of ownership
generated from or attributable to the Assets after the Effective Time, including
the  right  to  all  oil, gas and other hydrocarbons thereafter produced from or
attributable to the Assets, and the  proceeds thereof.  Purchaser shall bear and
be responsible for the duties, liabilities, costs, expenses and  obligations  of
ownership  attributable  to the Assets from and after the Effective Time, except
as may be otherwise provided herein.


                           ARTICLE 2.  CONSIDERATION

     2.1  Consideration.  As consideration for this  Agreement and the  transfer
of the Assets at Closing, Purchaser shall pay to Seller Seventy-Four Million and
00/100 Dollars  ($74,000,000.00)  (the  "Purchase  Price"),  as  may be adjusted
pursuant hereto (the "Adjusted Purchase Price").  The Purchase  Price  has  been
allocated  for  the purposes of Purchase Price adjustments only among the Assets
by Purchaser and agreed to by Seller as provided in Exhibit A-1.

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     2.2  Manner of Payment.  At  Closing,  except  as provided in the following
Section 2.3, Purchaser shall  pay  Seller  or  Seller's  designee  the  Adjusted
Purchase  Price  by  wire  transfer of immediately available funds in accordance
with Seller's written  instructions  delivered  to  Purchaser three (3) business
days before Closing.

     2.3  Like Kind Exchange Option.  Seller, in lieu of the sale of the  Assets
to Purchaser for the cash consideration provided herein, shall have the right at
any  time  prior  to Closing to assign all or a portion of its rights under this
Agreement to a qualified  intermediary  in  order to accomplish the transactions
contemplated hereby in a manner that will comply, either in whole  or  in  part,
with  the  requirements  of a like kind exchange pursuant to Section 1031 of the
Code.  If Seller  assigns  its  rights  under  this  Agreement  pursuant to this
Section 2.3, Seller agrees to notify Purchaser in  writing  of  such  assignment
before and at Closing assign the Assets directly to Purchaser.  Purchaser agrees
to  (i)  consent to Seller's assignment of its rights in this Agreement pursuant
to this Section 2.3,  and  (ii)  deposit  the  Adjusted  Purchase Price with the
qualified escrow or qualified trust account that has been designated  by  Seller
at least three (3) days before Closing.  All risks associated with any like kind
exchange  and  compliance  thereof  with  applicable laws, rules and regulations
shall be the sole responsibility of  Seller,  and Seller agrees to indemnify and
hold Purchaser harmless from and against all costs,  expenses,  liabilities  and
obligations  which  arise as a result of the like kind exchange pursuant to this
Section 2.3.


                 ARTICLE 3.  CERTAIN PURCHASE PRICE ADJUSTMENTS

     3.1  Definition of Marketable Title.   As used herein, the term "Marketable
Title" shall mean, as to the Assets, such right, title and interest as shown  of
record  that  (a)  entitles  Seller  (and  after Closing, Purchaser, as Seller's
successor in title) to receive not less  than the net revenue interest set forth
in Exhibit A-1 of all oil, gas and associated liquid  and  gaseous  hydrocarbons
produced,  saved  and  marketed  from the Assets, and the share allocated to the
Assets of all oil, gas and  associated liquid and gaseous hydrocarbons produced,
saved and marketed from any unit of which  the  Assets  are  part,  all  without
reduction,  suspense, or termination of the net revenue interests in the Assets,
except as stated  in  Exhibit  A-1,  (b)  obligates  Seller  (and after Closing,
Purchaser, as Seller's successor in title) to bear a percentage of the costs and
expenses relating to the maintenance and development of and operations  relating
to  the  Assets not greater than the working interests shown in Exhibit A-1, all
without increase of the working interests  in the Assets throughout the duration
of the Assets, except as stated in Exhibit A-1, and  (c)  except  for  Permitted
Encumbrances,  and  subject  to  Section  3.2  and 3.9, is free and clear of all
liens, claims and encumbrances.

     3.2  Guerra Lawsuit.  Purchaser agrees  to  accept  and purchase the Assets
subject to and encumbered  by  its  share  of  potential  liabilities,  if  any,
attributable  to  the  Assets  and  resulting  from and in connection with Civil
Action No. M-95-041; Heirs of  H.  P.  Guerra,  Dec'd.  v.  The United States of
America, et al.; in the United  States  District  Court,  Southern  District  of
Texas,   McAllen   Division  (the  "Guerra  Lawsuit").   Purchaser  agrees  that
assumption of the potential liabilities of  the Guerra lawsuit shall not entitle
Purchaser to a Purchase Price adjustment or constitute a Title Defect

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even though the results of and  its  disposition, including, but not limited to,
the settlement thereof, could affect Marketable Title.

     3.3  Definition of  Permitted  Encumbrances.   As  used  herein,  the  term
"Permitted  Encumbrances"  shall  mean the following items, provided none of the
following items shall operate to increase  the working interests or decrease the
net revenue interests of Seller as set forth on  Exhibit  A-1  for  any  of  the
Assets during the duration of the life of the Assets:

     (a)  Lessors'   royalties,   overriding   royalties,  production  payments,
          reversionary interests of record as of the Effective Time;

     (b)  Division orders and sales contracts  that are terminable upon not more
          than thirty (30) days notice;

     (c)  The  Partial  Release  of  Transportation   Agreement,   the   Partial
          Assignment  of  Gas Gathering Contract, and the First Amendment to Gas
          Treatment Agreement attached  hereto  as  Exhibits  C-1,  C-2 and D-1,
          respectively;

     (d)  Preferential rights to purchase ("Preferential Rights")  and  required
          third party consents to assignments ("Consents to Assign") and similar
          agreements  with respect to which (i) waivers or consents are obtained
          from the appropriate  parties  before  Closing,  (ii) required notices
          have been given to the holders of such rights and the appropriate time
          periods for asserting such rights have expired before Closing  without
          an  exercise  of  such  rights,  or  (iii)  appropriate  parties  have
          exercised  such  rights  and  the  Purchase  Price  has  been adjusted
          pursuant to Section 3.7;

     (e)  Materialman's,  mechanic's,   repairman's,  employee's,  contractor's,
          operator's, and tax (other than income tax) liens or  charges  arising
          in  the  ordinary  course  of  business  for  obligations that are not
          delinquent and that will be paid and discharged in the ordinary course
          of business or are being contested in good faith;

     (f)  Rights to consent  by,  required  notices  to,  filings with, or other
          actions by governmental entities or any  other  person  in  connection
          with  the  sale or conveyance of oil and gas leasehold and fee estates
          or interests therein,  which  consents,  notices, filings and/or other
          actions are customarily obtained after the Closing;

     (g)  Easements, rights-of-way,  servitudes,  permits,  surface  leases  and
          other  rights  in  connection with surface operations on the Assets of
          record as of the Effective  Time  or  which have been obtained for the
          benefit of Seller, or obtained by or assigned to  Coastal  Oil  &  Gas
          Corporation, as operator of the Assets;

     (h)  Rights  reserved to or vested in any governmental, statutory or public
          authority to control or regulate any  of the Assets in any manner, and
          all applicable laws, rules and

                                      -4-

          orders of  any  governmental  authority  provided  such  rights do not
          prohibit Seller's rights to conduct oil  and  gas  operations  on  the
          Assets;

     (i)  Assignments,  letter  agreements,  gas  gathering  contracts,  partial
          releases and farmout agreements listed on Exhibit E-1;

     (j)  Operating  agreements,  unit  agreements,  unit  operating agreements,
          pooling  agreements  and   pooling   designations  (including  Federal
          Communitization  Agreements  and  Declaration  of   Unit   Agreements)
          affecting  the  Assets which are of record as of the Effective Time or
          described in Exhibit E-2 and all actions taken or operations occurring
          in the normal course of business pursuant to such instruments;

     (k)  All liens and contested taxes set forth on Exhibits F and I.

     3.4  Title Defect.  For the  purpose  of  this  Agreement, a "Title Defect"
shall mean any liens, charges, contracts, agreements, obligations, encumbrances,
defects or irregularities of title which cause title  to  all  or  part  of  the
Assets  not to be Marketable Title other than as set forth in Sections 3.2, 3.3,
and 3.9, including, but not limited to, the following:

     (a)  The title of Seller,  as  to  one  or  more  of the Assets, other than
          surface land interests, is subject to an outstanding mortgage, deed of
          trust, lien or encumbrance or other adverse claim not shown on Exhibit
          F for which a release in  recordable  form  that  is  satisfactory  to
          Purchaser  is  not  available  to Purchaser contemporaneously with the
          occurrence of Closing;

     (b)  The net revenue interest of  Seller  in  any  of the Assets is or will
          become less than the net  revenue  interest  which  is  set  forth  in
          Exhibit A-1 for such property;

     (c)  The  working interest of Seller in any of the Assets is or will become
          greater than the working interest  which  is  set forth in Exhibit A-1
          for such property;

     (d)  A material default of Seller exists under some material provision of a
          lease, agreement or other contract affecting the Assets which will not
          be cured prior to or at the Closing; or

     (e)  The rights and interests of Seller are subject  to  being  reduced  by
          virtue  of the exercise by a third party of a reversionary, back-in or
          similar right not reflected or provided for in Exhibit A-1.

     3.5  Notice of Title Defect or  Title  Increase.  Upon discovery of a Title
Defect, Purchaser shall immediately notify Seller in writing of  the  nature  of
the  Title  Defect  and furnish therewith Purchaser's basis for the assertion of
such Title Defect and data in support thereof.  Any claim for a price adjustment
for a Title Defect (other than  claims  made pursuant to Section 3.6.1) of which

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Seller is not notified in writing by Purchaser at least five (5)  business  days
prior  to  the  Closing,  whether  known  or unknown, shall be forever waived by
Purchaser.

     Upon discovery that the  net  revenue  interest  actually being conveyed to
Purchaser by Seller is greater  than  that  shown  on  Exhibit  A-1  or  working
interest  actually being conveyed to Purchaser by Seller is less than that shown
on Exhibit A-1 (a "Title Increase") Seller shall immediately notify Purchaser in
writing of the nature of the Title Increase and furnish therewith Seller's basis
for the assertion of such Title Increase and data in support thereof.  Any claim
for a price adjustment for a  Title  Increase of which Purchaser is not notified
in writing by Seller at least five (5)  business  days  prior  to  the  Closing,
whether known or unknown, shall be forever waived by Seller.

     3.6  Remedies for Title Defects and Title Increases.  Upon timely delivery
of  notice,  either  by  Purchaser  of  a  Title  Defect or by Seller of a Title
Increase, Purchaser and Seller shall meet and use their best efforts to agree on
the validity of the  claim  and  the  amount  of  any required adjustment to the
Purchase Price, provided that in no event shall any Purchase Price reduction for
an affected property exceed the amount allocated to  the  affected  property  on
Exhibit  A-1.   If the Purchaser and Seller cannot agree on the amount of such a
Purchase Price adjustment, said  amount  shall  be determined in accordance with
the following guidelines:

     (a)  If the Title Defect is based upon Purchaser's notice that  the  Seller
          owns  a  lesser  net revenue interest, or the notice is from Seller to
          the effect that Seller owns  a  greater net revenue interest than that
          shown on Exhibit A-1, then the portion of the Purchase Price allocated
          to the affected property on Exhibit A-1 shall be reduced or  increased
          (as  the  case  may  be)  in  the  same proportion that the actual net
          revenue interest bears to  the  net  revenue interest shown on Exhibit
          A-1 for such property.

     (b)  If the Title Defect is a lien, encumbrance  or  other  charge  upon  a
          property  which  is liquidated in amount, then the adjustment shall be
          the sum necessary to be paid to the obligee to remove the Title Defect
          from  the  affected  property.   If  the  Title  Defect  represents an
          obligation or burden upon the affected property for which the economic
          detriment to Seller is  not  liquidated  but  can  be  estimated  with
          reasonable certainty as agreed to by the parties, the adjustment shall
          be  the  sum  necessary to compensate Purchaser at the Closing for the
          adverse economic  effect  which  the  Title  Defect  will  have on the
          affected property.  If there is a lien or encumbrance in the form of a
          judgment secured by a supersedeas bond or other security  approved  by
          the court issuing such judgment, the Purchase Price shall be decreased
          by the amount of such lien or encumbrance.

     (c)  If  the Title Defect  cannot  be  accommodated  pursuant  to  Sections
          3.6(a)  or 3.6(b) and the parties cannot otherwise agree on the amount
          of such an adjustment to the  Purchase Price or Seller cannot cure the
          Title Defect to the reasonable satisfaction of Purchaser prior to  the
          Closing,  the  property affected by the Title Defect shall be excluded
          from the Assets conveyed to Purchaser at the Closing and the Purchase

                                      -6-

          Price shall  be  reduced  by  the  amount  allocated  to  the affected
          property on Exhibit A-1.

     (d)  Purchaser  may only adjust the Purchase Price  for  Title  Defects  at
          Closing  if  the  cumulative  amount  of  such adjustments in favor of
          Purchaser exceeds $500,000.00.  Similarly,  Seller may only adjust the
          Purchase Price for Title Increases at Closing if the cumulative amount
          of such adjustments in favor of Seller exceeds $500,000.00.

     3.6.1  Third  Party Title Claims.  In the event  a  third  party  files  of
record  any  instrument  that  creates a Title Defect during the period five (5)
business days prior to  Closing  ("Third  Party  Title Defect"), Purchaser shall
immediately, upon discovery, notify Seller in writing of the nature of the Third
Party Title Defect and furnish therewith Purchaser's basis for the assertion  of
such Third Party Title Defect and data in support thereof.  Notwithstanding such
notice  by  Purchaser,  Closing  shall  occur  as  to the unaffected Assets.  At
Closing, the affected property shall be  excluded from the Assets to be conveyed
to Purchaser and the Purchase Price shall be reduced by the amount allocated  to
the  affected  property on Exhibit A-1.  Seller shall have the option within ten
(10) business days after notice  from  Purchaser  to  cure the Third Party Title
Defect to the reasonable satisfaction of Purchaser.  If the  Third  Party  Title
Defect is cured within such time, a closing on the affected property shall occur
within  five  (5)  business  days  of  acceptance  by  Purchaser  and the amount
allocated to the affected property by which the Purchase Price was reduced shall
be paid by Purchaser to  Seller  in  the  manner  set  forth in Section 2.2.  If
Seller elects not to cure the Third Party Title Defect, or, is  unable  to  cure
the  Third Party Defect to the reasonable satisfaction of Purchaser, Seller will
retain ownership of the affected property.

     3.7  Preferential Rights - Consents  to Assign.  If a Preferential Right is
exercised prior to the Closing,  then  the affected properties shall be excluded
from the Assets and the Purchase Price reduced by the amount  allocated  to  the
affected  properties  on  Exhibit  A-1.   If a Consent to Assign is not obtained
(other than governmental approvals and other consents routinely acquired after a
transfer) prior to the Closing, Purchaser  shall  have the option to exclude the
affected properties and reduce the Purchase Price by the amount allocated to the
affected properties on Exhibit A-1 or include the  affected  properties  in  the
properties to be conveyed without a reduction in the Purchase Price.

     3.8  Casualty Losses.  The term "Casualty" means, a material adverse change
in  the  Assets,  taken  as  a  whole,  which is caused by an event of casualty,
including but not limited to, volcanic  eruptions, acts of God, fire, explosion,
earthquake, wind storm, strike, lockout, labor  dispute,  flood,  drought,  war,
embargo,  riot,  condemnation,  the  exercise  of  any  right of eminent domain,
confiscation, seizure, activities of armed  forces,  operation of laws, rules or
regulations (regardless of whether covered by insurance, but excepting depletion
due to normal production, depreciation of equipment through  ordinary  wear  and
tear  and  transactions  permitted under this Agreement).  If, subsequent to the
Effective Time and prior  to  Closing,  a  Casualty occurs (or Casualties occur)
which results in a reduction in the aggregate value  of  the  Assets  ("Casualty
Loss")  by  an  amount  equal  to  Ten Million Dollars ($10,000,000.00) or more,
Purchaser may elect to

                                      -7-

terminate this  Agreement.   If  Purchaser  does  not  elect  to  terminate this
Agreement notwithstanding such Casualty Loss or if the  Casualty  Loss  is  less
than  Ten Million Dollars ($10,000,000.00), then Purchaser shall have the option
to require Seller to either (i)  retain  the Asset affected by such Casualty and
such Asset shall be subject to the adjustment of  Purchase  Price  in  the  same
manner  set  forth  in  Section  3.6  hereof as if the Casualty Loss was a Title
Defect, or (ii) pay to Purchaser at Closing all sums paid to Seller by reason of
such Casualty, provided however, that  the  Purchase Price shall not be adjusted
by reason of such payment, and Seller shall assign, transfer and set  over  unto
Purchaser  all  of  the right, title and interest of Seller in and to such Asset
and any unpaid awards or  other  payments  arising out of such Casualty.  Seller
shall not voluntarily compromise, settle or adjust any amounts payable by reason
of such Casualty without first obtaining the written consent of Purchaser.

     3.9  Litigation and Claims.   Purchaser  agrees  that  the  litigation  and
claims  listed  on  Exhibit  G  shall  not entitle Purchaser to a Purchase Price
adjustment or constitute a Title  Defect  even  though  the results of and their
disposition, including, but not limited to, the settlement thereof, could affect
Marketable Title.

         ARTICLE 4.  SELLER'S REPRESENTATIONS, WARRANTIES AND COVENANTS

     4.1  Seller's  Representations  and  Warranties.   Seller  represents   and
warrants to Purchaser as of the date hereof and at Closing that:

     (a)  Existence.   Seller  is  a  limited  partnership  duly organized, duly
qualified to own the Assets,  validly  existing,  and in good standing under the
laws of the State of Delaware and that Tesoro Exploration and Production Company
is the general partner of Seller;

     (b)  Power.  Seller has the power and authority to enter into  and  perform
this  Agreement  and  the  transactions  contemplated  hereby.   The  execution,
delivery  and  performance  of  this  Agreement by Seller (acting by and through
Tesoro  Exploration  and  Production  Company,  its  general  partner),  and the
transactions contemplated hereby, will not (i) violate any provision of Seller's
certificate of limited partnership, partnership  agreement  or  other  governing
documents,  (ii)  to  the  best  knowledge  and belief of Seller, conflict with,
result in a breach or, constitute a default (or any event that with the lapse of
time or notice, or  both,  would  constitute  a  default) under any agreement or
instrument to which Seller is a party or by which Seller is bound, (iii) to  the
best  knowledge  and  belief  of Seller, violate any judgment, order, ruling, or
decree applicable to Seller and  entered  or  delivered in a proceeding in which
Seller was or is a named party, or (iv) to the  best  knowledge  and  belief  of
Seller, violate any applicable law, rule or regulation;

     (c)  Authorization.   The  execution,  delivery  and  performance  of  this
Agreement and the transactions  contemplated  hereby  have been duly and validly
authorized by all requisite action on the part of Seller and Tesoro  Exploration
and  Production  Company,  its  general  partner.   This  Agreement will be duly
executed

                                      -8-

and delivered on  behalf  of  Seller,  and  at  the  Closing,  all documents and
instruments required hereunder to be executed and delivered by Seller  shall  be
duly  executed and delivered.  This Agreement and such documents and instruments
shall constitute legal, valid and  binding  obligations of Seller enforceable in
accordance with their terms subject,  however,  to  the  effect  of  bankruptcy,
insolvency,  reorganization,  moratorium  and  similar laws from time to time in
effect relating to the rights and  remedies  of creditors, as well as to general
principles of equity (regardless of whether such enforceability is considered in
a proceeding in equity or at law);

     (d)  Brokers.  Seller has incurred no obligation or  liability,  contingent
or  otherwise,  for brokers' or finders' fees in respect of the matters provided
for in this Agreement which  will  be  the  responsibility of Purchaser, and any
such obligation or liability that might exist shall be the  sole  obligation  of
Seller;

     (e)  Foreign  Person.   Seller is not a "foreign person" within the meaning
of the Code;

     (f)  No Liens.  At Closing, the Assets  will not be subject to any security
interests,  lien,  mortgages  or  other  encumbrances   other   than   Permitted
Encumbrances;

     (g)  Valid Agreements.  The oil and gas leases and other material contracts
and agreements constituting a part of the Assets are valid and in full force and
effect,  and  no  party is in breach of or default, or with the lapse of time or
giving of notice or both would be  in  breach or default, with respect to any of
its obligations thereunder and no party has given or threatened to  give  Seller
notice  of any default thereunder, except to the extent any deficiency or notice
with respect thereto as set forth in Exhibit G;

     (h)  Reservations.  There are no reservations which affect the Assets other
than those currently of record  as  of  the  Effective  Time, or as set forth on
Exhibits B and L;

     (i)  Permits.  To the best  of  Seller's  knowledge,  Seller  possesses  or
others  possess  for  the benefit of Seller all licenses, permits, certificates,
orders, approvals and authorizations necessary  to own, operate and maintain the
Assets;

     (j)  Compliance with Law. Seller is in material compliance with  all  laws,
ordinances,  rules,  regulations  and orders applicable to the Assets, except to
the extent of any non-compliance that is  not reasonably expected to result in a
material adverse affect on the Assets; however,  Seller  has  not  received  any
notice  of  any  claimed  noncompliance therewith, except as may be contained in
Exhibit G. Seller is  not  aware  of  any  facts, conditions or circumstances in
connection with, related to, or associated with the Assets that could reasonably
be expected to give rise to any claim or assertion that the Seller, the  Assets,
or  the  ownership  or  operation  of  any thereof is not in compliance with any
applicable law,  rule,  regulation,  ordinance,  or  order  of  any governmental
authority or with any terms or conditions of  any  applicable  permit,  license,
approval, consent, certificate or other authorization;

     (k)  Taxes.   All  ad  valorem, property, production, severance, excise and
similar taxes and assessments based on  or measured by the ownership of property
or the production of hydrocarbons

                                      -9-

or the receipt of proceeds therefrom attributable to the Assets that have become
due and payable have been properly and timely  paid,  except  as  identified  on
Exhibit I;

     (l)  No  Call.   No person has any call upon, option to purchase or similar
rights under  any  agreement  with  respect  to  the  Assets  or  the production
attributable thereto which is not disclosed in the  public  records  or  as  set
forth in Exhibit J;

     (m)  Litigation.   To  the best knowledge and belief of Seller, there is no
litigation, investigation or proceeding affecting the Assets, whether pending or
threatened in writing, except as may be listed in Exhibit G;

     (n)  Casualty Loss.  There  shall  not  have  been  a  Casualty Loss of Ten
Million Dollars ($10,000,000.00) or more.

     (o)  Notice of Claims.   To  the  personal  knowledge  and  belief  of  the
officers,  directors  and  management  of  Seller, there exist no General Claims
(defined in Section 10.4) or claims  that  would result in a partial or complete
loss of Marketable Title with respect to the Assets other than those  set  forth
in this Agreement, including the Exhibits thereto; and

     (p)  Prior  Conveyances.   There  are  no  prior  conveyances, transfers or
assignments by Seller, its parent or  Affiliates (defined in Section 15.14) that
would result in a reduction of the net revenue  interests  or  increase  in  the
working interests set forth on Exhibit A-1.

     4.2  Limitation  and  Disclaimer  of  Representations  and Warranties.  The
express representations and warranties of Seller contained in this Agreement are
exclusive and are in lieu of  all other representations and warranties, express,
implied, statutory, or otherwise.  Any assignment and  bill  of  sale  or  other
conveyance  executed  and  delivered  pursuant hereto shall be:  (a) without any
warranty or  representation  of  title,  either  express,  implied, statutory or
otherwise, except as  to  those  claiming  by,  through,  or  under  Seller  and
Affiliates  of  Seller,  but  not  otherwise,  as  expressly  provided herein or
therein; (b)  WITHOUT  ANY  EXPRESS,  IMPLIED,  STATUTORY  OR  OTHER WARRANTY OR
REPRESENTATION AS TO THE CONDITION, QUANTITY OF PRODUCTION OR RESERVES, QUALITY,
FITNESS FOR A PARTICULAR PURPOSE, CONFORMITY TO MODELS OR SAMPLES  OF  MATERIALS
OR MERCHANTABILITY OF ANY OF THE  ASSETS  OR  THEIR FITNESS FOR ANY PURPOSE; and
(c)  without  any  other  express,  implied,  statutory  or  other  warranty  or
representation whatsoever.  At Closing, Purchaser shall have satisfied itself as
to the physical condition of the Assets, both surface and subsurface.  Purchaser
is relying solely upon its own inspection of the Assets or waiver of  the  right
to  inspect, and is not relying upon any representation or warranty of Seller or
Seller's representatives except the specific warranties and representations made
herein, as limited herein, and,  PURCHASER  SHALL  ACCEPT ALL OIL AND GAS WELLS,
EQUIPMENT,  FACILITIES,  SUPPLIES,  MACHINERY,  SIGNAGE,  TANKS  AND  ALL  OTHER
TANGIBLE PERSONAL PROPERTY AND FIXTURES LOCATED ON THE ASSETS IN THEIR  "AS  IS,
WHERE  IS"  CONDITION.   Except as specifically stated in this Agreement, Seller
makes no warranty or representation, express, implied,

                                      -10-

statutory or otherwise, as to the accuracy or completeness of any data, reports,
records, projections,  information  or  materials  now,  heretofore or hereafter
furnished or made available to Purchaser  in  connection  with  this  Agreement,
including,   without   limitation,   any  description  of  the  Assets,  pricing
assumptions,  or  quality  or   quantity   of   hydrocarbon  reserves,  if  any,
attributable to the Assets or the ability or potential of the Assets to  produce
hydrocarbons  or  any other matters contained in confidential information or any
other materials  furnished  or  made  available  to  Purchaser  by  Seller or by
Seller's agents or representatives.   The  parties  agree  that  to  the  extent
required to be operative, the disclaimers of the warranties contained herein are
"conspicuous"  disclaimers  for  the  purposes  of  any applicable law, rule, or
order.

       ARTICLE 5.  PURCHASER'S REPRESENTATIONS, WARRANTIES AND COVENANTS

     5.1  Purchaser  represents and warrants to Seller as of the date hereof and
at Closing that:

     (a)  Existence.  Purchaser is  a  limited  partnership duly organized, duly
qualified to own the Assets, validly existing, and in good  standing  under  the
laws of the State of Texas, Coastal Oil & Gas Corporation is the general partner
of  Purchaser  and Purchaser is duly qualified to own properties in Texas and to
carry on its business as now being conducted.

     (b)  Power.  Purchaser has the requisite  power and authority to enter into
and perform this  Agreement  and  the  transactions  contemplated  hereby.   The
execution,  delivery  and  performance of this Agreement by Purchaser (acting by
and through  Coastal  Oil  &  Gas  Corporation,  its  general  partner), and the
transactions  contemplated  hereby,  will  not  (i)  violate  any  provision  of
Purchaser's certificate of limited partnership, partnership agreement  or  other
governing  documents;  (ii)  to  the  best  knowledge  and  belief of Purchaser,
conflict with, result in a  breach  of,  constitute  a default (or an event that
with the lapse of time or notice, or both would constitute a default) under  any
agreement  or  instrument to which Purchaser is a party or by which Purchaser is
bound; (iii)  to  the  best  knowledge  and  belief  of  Purchaser,  violate any
judgment, order, ruling, or  decree  applicable  to  Purchaser  and  entered  or
delivered in a proceeding in which Purchaser was or is a named party; or (iv) to
the  best knowledge and belief of Purchaser, violate any applicable law, rule or
regulation.

     (c)  Authorization.   The  execution,  delivery  and  performance  of  this
Agreement and the transactions  contemplated  hereby  have been duly and validly
authorized by all requisite action on the part of Purchaser and  Coastal  Oil  &
Gas Corporation, its general partner.  This Agreement has been duly executed and
delivered  on  behalf  of  Purchaser,  and  at  the  Closing,  all documents and
instruments required hereunder to be  executed  and delivered by Purchaser shall
have been duly executed and delivered.  This Agreement and  such  documents  and
instruments  shall  constitute legal, valid and binding obligations of Purchaser
enforceable in accordance with their  terms,  subject, however, to the effect of
bankruptcy, insolvency, reorganization, moratorium and similar laws from time to
time in effect relating to the rights and remedies of creditors, as well  as  to
general  principles  of  equity  (regardless  of  whether such enforceability is
considered in a proceeding in equity or at law).

                                      -11-

     (d)  Brokers.   Purchaser  has   incurred   no   obligation  or  liability,
contingent or otherwise, for brokers' or finders' fees in respect of the matters
provided for in this Agreement which will be the responsibility of  Seller;  and
any  such  obligation or liability that might exist shall be the sole obligation
of Purchaser.

     (e)  Notice of  Claims.   To  the  personal  knowledge  and  belief  of the
officers, directors and management of Purchaser, there exist no  General  Claims
or  claims  that  would result in a partial or complete loss of Marketable Title
with respect to  the  Assets  other  than  those  set  forth  in this Agreement,
including the Exhibits thereto.

     5.2  Limitation and  Disclaimer  of  Representations  and  Warranties.  The
express representations and warranties of Purchaser contained in this  Agreement
are  exclusive  and  are  in  lieu  of all other representations and warranties,
express, implied, statutory, or otherwise.

                       ARTICLE 6.  MAINTENANCE OF ASSETS

     6.1  Maintenance of Assets.   Seller  covenants  and  agrees  that from and
after the execution of this Agreement and until Closing, Seller will  not  sell,
transfer,  assign,  convey  or otherwise dispose of any of the Assets subject to
Seller's  direct  control,  other  than  (a)  oil,  gas  and  other hydrocarbons
produced, saved and sold in  the  ordinary  course  of  business,  (b)  personal
property  and  equipment  which  is  replaced  with  property  and  equipment of
comparable or better value and  utility  in the ordinary and routine maintenance
and operation of the Assets, and (c) as required in connection with any exercise
of Preferential Rights.  Seller will not, without the prior written  consent  of
Purchaser,  (i)  grant  any  preferential or other right to purchase or agree to
require the consent of any party  to  the transfer and assignment of the Assets;
(ii) enter into any new sales  contracts  or  supply  contracts  which  are  not
terminable  without penalty upon notice of thirty (30) days or less with respect
to the Assets with any entity which  is  not an Affiliate of Purchaser; or (iii)
incur or agree  to  incur  any  material  contractual  obligation  or  liability
(absolute or contingent) with respect to the Assets except as otherwise provided
herein.   Seller shall promptly provide Purchaser with written notice of (i) any
claims, demands, suits or  actions  made  against Seller which materially affect
the Assets; or (ii) any proposal from a third party to engage  in  any  material
transaction (e.g., a farmout) with respect to the Assets.

     6.2  No  Encumbrances.   Seller will not create any lien, security interest
or encumbrance on the Assets, the oil  or gas attributable to the Assets, or the
proceeds therefrom, other than Permitted Encumbrances.

     6.3  Access to Records.  Seller  will  provide  Purchaser  through  Closing
access to the Records during normal business hours at Seller's place of storage.
From  and  after the date of the execution of this Agreement through the date of
Closing, Seller shall not  add  to  or  remove  from  the Records any contracts,
instruments, documents or other materials except for such additions and removals
as are done  in  the  ordinary  course  of  business  with  respect  to  ongoing
operations.  Seller shall promptly provide Purchaser copies of such.

                                      -12-

     6.4  Operations.   Seller  covenants  and  agrees  that  from and after the
execution of this Agreement and until  the  Closing, Seller will, subject to the
rights of affected parties under applicable agreements:

     (a)  cause the Assets  to  be  developed,  maintained  and  operated  in  a
          prudent,  good and workmanlike manner, maintain insurance now in force
          with respect to the Assets , and pay or cause to be paid all costs and
          expenses in connection therewith;

     (b)  not participate in the drilling of any  new well on the Assets or fail
          to participate in operations on the Assets proposed by  other  parties
          without  the  advance written consent of Purchaser unless Purchaser or
          an Affiliate is a participant or as set forth in Exhibit K;

     (c)  not take any action or  fail  to  take  any action which is reasonably
          expected to result  in  any  termination  of  the  orders,  contracts,
          documents,    leases,   deeds,   unitization   agreements,   operating
          agreements,   participation   agreements,   easements,  rights-of-way,
          licenses,  authorizations,  permits,  and  other  similar  agreements,
          documents, rights, and interests forming a part of the Assets;

     (d)  perform and comply or cause the performance and compliance with all of
          its obligations under agreements relating to or affecting  the  Assets
          including,  but  not  limited to, payment of royalties, delay rentals,
          shut-in gas royalties and any and all other required payments;

     (e)  carry on its business with respect  to the Assets in substantially the
          same manner as it has heretofore, not introducing any  new  method  of
          management,  operation or accounting with respect to the Assets except
          as may be required by applicable  statutes, rules or regulations or by
          applicable  presently  existing  contractual  obligations  or  prudent
          business practices; and

     (f)  not, without the written consent of Purchaser, enter  into  or  assume
          any  contract,  agreement  or  commitment which is not in the ordinary
          course of business as heretofore  conducted or which involves payments
          by Seller or potential liabilities  of  Seller  with  respect  to  the
          Assets  of more than $25,000.00, or aggregate expenditures that exceed
          $300,000.00,   (in   either    case,    net    to   Seller's   working
          interest),whichever is the greater, excluding emergency  expenditures,
          expenditures  which  Purchaser  or  one of its Affiliates proposes, or
          those expenditures listed on Exhibit K.

     6.5  Other Covenants.  Seller will:

     (a)  not  enter  into  any  settlement  of  or  relinquish  any outstanding
          receivables which are a part of the  Assets  attributable  to  periods
          after the Effective Time (including, without limitations, the right to
          receive any retroactive price adjustments, take-or-pay

                                      -13-

          monies,   FERC   mandated   refunds,   accounting   adjustments,   tax
          adjustments, and Minerals Management Service refunds);

     (b)  if any approval or consent by any federal, state or local governmental
          authority is required to vest Marketable Title to any of the Assets in
          Purchaser  at  Closing,  exercise  its  best  efforts,  as  reasonably
          requested  by  Purchaser,  to  obtain  all  such required approvals or
          consents; and

     (c)  through Closing, give prompt written notice to Purchaser of any notice
          of default (or written threat  of default, whether disputed or denied)
          received  or  given  by  Seller  under  any  instrument  or  agreement
          affecting the Assets to which Seller is a part of by which it  or  any
          of the Assets are bound.


                   ARTICLE 7.  SELLER'S CONDITIONS OF CLOSING

     Seller's  obligation  to consummate the transactions provided for herein is
subject only to the satisfaction or waiver by Seller on or before the Closing of
the following conditions:

     7.1  Representations.   The  representations  and  warranties  of Purchaser
contained in Article 5 shall be true and correct in all material respects on the
date of Closing as though made on and as of that date.

     7.2  Performance.  Purchaser shall have performed in all material  respects
the  obligations, covenants and agreements hereunder to be performed by it at or
prior to the Closing.

     7.3  Officer's Certificate.  Purchaser  shall  have  delivered  to Seller a
certificate of an executive officer of its general partner, dated  the  date  of
Closing,  certifying  on  behalf  of  Purchaser that the conditions set forth in
Sections 7.1 and 7.2 have been fulfilled.

     7.4  Pending Matters.  No suit, action or other proceeding by a third party
or a governmental authority shall  be  pending or threatened which seeks damages
from Seller in connection with,  or  seeks  to  restrain,  enjoin  or  otherwise
prohibit, the consummation of the transactions contemplated by this Agreement.

     7.5  HSR  Act  Filing.   The waiting period (and any extension thereof), if
any, under the HSR Act  applicable  to the transaction contemplated hereby shall
have expired or been terminated.

     7.6  No Orders.  The Closing hereunder  shall  not  violate  any  order  or
decree  of  any  governmental  authority  having competent jurisdiction over the
transaction contemplated by  this  Agreement;  provided,  however,  that if such
order or decree  and  all  other  conditions  precedent  to  Closing  have  been
satisfied  or  waived,  the  Closing  shall  be  extended  to a date thirty (30)
business

                                      -14-

days subsequent to the  date  on  which  such  temporary restraining order or ex
parte order or decree ceases to be in effect.



     7.7  Treatment Agreement.  Purchaser shall have entered  into  a  Treatment
Agreement, acceptable to Seller, with the Operator of the Bob West Field Central
Treatment  Facility  in  substantially  the same form as the Treatment Agreement
dated March 2, 1994, effective February 1, 1991, between Seller and the Operator
that would include but not be  limited  to  the terms on Exhibit D-2.  Purchaser
shall furnish Seller a copy of the form of the Treatment Agreement at least five
(5) business days prior to Closing.

     7.8  Transportation  Agreement.   Purchaser  shall  have  entered  into  an
amendment to the Transportation Agreement dated May 11,  1994,  between  Coastal
Oil  & Gas Corporation and Coastal States Gas Transmission Company (the "Coastal
Transportation Agreement") that would:

     (i)    add Purchaser as a party to the Coastal Transportation Agreement and
            add the Assets to the properties and  gas  covered  by  the  Coastal
            Transportation Agreement;

     (ii)   be  effective April 1, 1995 and provide for a term of ten (10) years
            from April 1, 1995  insofar  as the Coastal Transportation Agreement
            covers the Assets and the gas produced therefrom;

     (iii)  Amend Sections 2.2(a)  and  2.2(b)  of  the  Coastal  Transportation
            Agreement by changing the term "40 Mmcf" to "100 Mmcf" in each place
            it occurs in such sections;

     (iv)   provide   that   the   parties   shall  not  terminate  the  Coastal
            Transportation Agreement, insofar  as  it  covers the Assets, unless
            consented to by  a  majority  of  the  owners  in  the  Starr-Zapata
            Pipeline; and

     (v)    provide that all other terms of the Coastal Transportation Agreement
            remain in full force and effect.

Purchaser  shall  furnish  Seller  a  copy  of  the form of the amendment to the
Coastal Transportation  Agreement  at  least  five  (5)  business  days prior to
Closing.

     7.9  Partial Assignment of  Gas  Gathering  Contract.  Seller and Purchaser
shall enter into a Partial Assignment of Gas Gathering Contract  whereby  Seller
assigns  to  Purchaser  the  Gas Gathering Contract dated February 1, 1991 among
Seller, Coastal Oil &  Gas  Corporation  and  the  Starr County Gathering System
insofar as it affects the gas attributable to the Assets in the form attached as
Exhibit C-2.

                                      -15-

                 ARTICLE 8.  PURCHASER'S CONDITIONS OF CLOSING

     Purchaser's  obligation  to consummate the transactions provided for herein
is subject only to the  satisfaction  or  waiver  by  Purchaser on or before the
Closing of the following conditions:

     8.1  Representations.   The  representations  and  warranties   of   Seller
contained in Article 4 shall be true and correct in all material respects on the
date  of  Closing  as  though  made  on  and  as  of  that  date.  The breach of
representations and warranties of  Seller  contained in Sections 4.1(f), 4.1(g),
4.1(h) and 4.1(i) shall be treated as Title Defects under Section 3.6 for  which
timely  notice  had  been  given  and  as  such  shall  not entitle Purchaser to
terminate this Agreement.

     8.2  Performance.  Seller shall have performed in all material respects the
obligations, covenants and agreements  hereunder  to  be  performed  by it at or
prior to the Closing.

     8.3  Officer's Certificate.  Seller shall have  delivered  to  Purchaser  a
certificate  of  an  executive officer of its general partner, dated the date of
Closing, certifying  on  behalf  of  Seller  that  the  conditions  set forth in
Sections 8.1 and 8.2 have been fulfilled.

     8.4  Pending Matters.  No suit, action or other proceeding by a third party
or a governmental authority shall be pending or threatened which  seeks  damages
from  Purchaser  in  connection  with, or seeks to restrain, enjoin or otherwise
prohibit, the consummation of the transactions contemplated by this Agreement.

     8.5  Preferential Rights and Consents  to  Assign.  All Preferential Rights
or Consents to Assign shall have been exercised, waived or obtained, as the case
may be, or Seller and Purchaser  shall  have  adjusted  the  Purchase  Price  in
accordance with the provisions of Section 3.7.

     8.6  HSR  Act  Filing.   The waiting period (and any extension thereof), if
any, under the HSR Act  applicable  to the transaction contemplated hereby shall
have expired or been terminated.

     8.7  No Orders.  The Closing hereunder  shall  not  violate  any  order  or
decree  of  any  governmental  authority  having competent jurisdiction over the
transaction contemplated by  this  Agreement;  provided,  however,  that if such
order or decree  and  all  other  conditions  precedent  to  Closing  have  been
satisfied  or  waived,  the  Closing  shall  be  extended  to a date thirty (30)
business days subsequent to the  date  on which such temporary restraining order
or ex parte order or decree ceases to be in effect.

     8.8  Casualty Loss.  There shall not have  been  a  Casualty  Loss  of  Ten
Million Dollars ($10,000,000.00) or more.

     8.9  Partial  Assignment  of  Gas Gathering Contract.  Seller and Purchaser
shall enter into a Partial  Assignment  of Gas Gathering Contract whereby Seller
assigns to Purchaser the Gas Gathering Contract dated  February  1,  1991  among
Seller, Coastal Oil & Gas Corporation and the

                                      -16-

Starr  County Gathering System insofar as it affects the gas attributable to the
Assets in the form attached as Exhibit C-2.


                              ARTICLE 9.  CLOSING

     9.1  Time and Place of  Closing.   If  the  conditions to Closing have been
satisfied or expressly waived by the party entitled to the benefits thereof, the
consummation of  the  transactions  contemplated  hereby  shall  take  place  at
Seller's  offices  on September 29, 1995 at 10:00 a.m.  Central Time, or at such
other place and time or in such other manner agreed upon by Seller and Purchaser
("Closing").  Closing shall be extended to a date on or before November 15, 1995
if the waiting period under the HSR  Act has not expired prior to the previously
scheduled Closing.  If the waiting period has not expired  before  November  15,
1995 then either party may elect to terminate this Agreement pursuant to Article
13.

     9.2  Closing Obligation.  At Closing,

     (a)  Seller   shall  execute,  acknowledge  and  deliver  to  Purchaser  an
          Assignment and Bill of Sale  in substantially the form attached hereto
          as Exhibit H, conveying the Assets to Purchaser as provided hereby;

     (b)  Seller and Purchaser shall execute, acknowledge and  deliver  transfer
          orders  or  letters  in  lieu thereof prepared by Seller directing all
          purchasers of production  to  make  payment  to  Purchaser of proceeds
          attributable to the Assets as of the Effective Time;

     (c)  Purchaser shall deliver the Adjusted Purchase  Price  as  provided  in
          Article 2;

     (d)  Purchaser  and Seller shall execute a preliminary settlement statement
          (the "Preliminary Statement") prepared by Seller and setting forth the
          Purchase Price and all adjustments thereto agreed upon by the parties,
          using the best information available, as provided herein;

     (e)  Purchaser and Seller shall execute a Partial Release of Transportation
          Agreement in  the  form  attached  hereto  as  Exhibit  C-1, a Partial
          Assignment of Gas Gathering Contract in the form  attached  hereto  as
          Exhibit  C-2,  and a First Amendment to Gas Treatment Agreement in the
          form attached hereto as Exhibit D-1;

     (f)  Purchaser and Seller shall execute  an Ingress and Egress Agreement in
          the form attached hereto as Exhibit L;

     (g)  Purchaser and Seller shall execute an Amendment to the 1989  Operating
          Agreement in the form attached hereto as Exhibit M.

                                      -17-

     (h)  Purchaser  and  Seller  shall execute a Termination of Modification of
          Operatorship attached hereto as Exhibit N.

     (i)  Purchaser and Seller shall exchange Officer's Certificates as provided
          in Sections 7.3 and 8.3;

     (j)  Seller  shall  deliver  to   Purchaser   releases  of  all  liens  and
          encumbrances other than those that have been handled as Title  Defects
          under Section 3.6;

     (k)  Purchaser  and  Seller  shall  execute such other instruments and take
          such other action as may  be  necessary  to carry out their respective
          obligations under this Agreement.


                     ARTICLE 10.  POST-CLOSING OBLIGATIONS

    10.1  Assumption of Liabilities by Seller.  On  and  after  Closing,  Seller
shall  bear and be responsible for the duties, liabilities, costs, expenses, and
obligations of ownership attributable to the  Assets prior to the Effective Time
(except for the gross negligence or willful misconduct on the part of  Purchaser
or an Affiliate of Purchaser), except as follows ("Seller's Liabilities"):

     (a)  any claims by Purchaser for the partial or complete loss of Marketable
          Title  (other  than  any loss of Marketable Title covered by the title
          warranties contained in  the  assignment  of  the Assets to Purchaser)
          resulting from a Title Defect that was waived pursuant to Section  3.5
          or Section 3.6.1.

     (b)  any claims by any party other than Seller, Purchaser, or Affiliates of
          Seller  or  Purchaser  for  damages, up to an aggregate of $1,000,000,
          arising out of (i) a partial or  complete loss of title if such claims
          are raised on or before the date two (2) years after Closing and  (ii)
          General Claims if such claims are raised on or before the date two (2)
          years  after  Closing (provided, however, Seller assumes liability for
          all damages attributable to  the  Assets  prior  to the Effective Time
          arising from or related to the issues raised in the letter  from  SASI
          Minerals  Company  dated  February  1,  1995,  to  Coastal  Oil  & Gas
          Corporation and Tesoro E&P Company, L.P.);

     (c)  any Accounting Claim or  Claims  not  raised in the Closing adjustment
          process described in Article 11;

     (d)  any Environmental Claim; and,

     (e)  any adverse judgment, litigation costs, attorneys fees and court costs
          in connection with the Guerra Lawsuit (provided, however, Seller shall
          bear all litigation costs, attorneys fees and court costs attributable
          to the period of time prior to the Closing).

                                      -18-

    10.2  Assumption  of  Liabilities  by  Purchaser.   On  and  after  Closing,
Purchaser  shall  not bear or be responsible for any duties, liabilities, costs,
expenses or obligations of  ownership  attributable  to  the Assets prior to the
Effective Time (including, but not limited to, the gross negligence  or  willful
misconduct  on  the part of Seller or an Affiliate of Seller), except as follows
("Purchaser's Assumed Liabilities"):

     (a)  any claims by any party other than Seller, Purchaser, or Affiliates of
          Seller  or  Purchaser  for  damages  up to an aggregate of $1,000,000,
          arising out of (i) a partial  or  complete loss of Marketable Title if
          such claims are raised on or before  the  date  two  (2)  years  after
          Closing  and  (ii)  any General Claims if such claims are raised on or
          before the date two (2) years after Closing;

     (b)  any claims by any party other than Seller, Purchaser, or Affiliates of
          Seller or Purchaser  for  damages  arising  out  of  (i)  a partial or
          complete loss of Marketable Title if such claims are raised after  the
          two  (2) year period after Closing and (ii) and General Claims if such
          claims  are  raised  after  the  two  (2)  year  period  after Closing
          (provided, however, Purchaser shall not bear or be responsible for any
          claim attributable to the Assets prior to the Effective  Time  arising
          from  or related to the issues raised in the letter from SASI Minerals
          Company dated February 1, 1995,  to  Coastal Oil & Gas Corporation and
          Tesoro E&P Company, L.P.);

     (c)  any Accounting Claims raised after 240 days after Closing described in
          Article 11;

     (d)  all Environmental Claims; and

     (e)  any adverse judgment in connection with the Guerra Lawsuit  (provided,
          however,  Purchaser  shall  not  be  responsible for litigation costs,
          attorneys fees and  court  costs  attributable  to  the period of time
          prior to Closing).

    10.3  Assumption of Benefits by Purchaser.  On and after Closing, Purchaser,
in addition to the Assets conveyed  to  Purchaser, shall be entitled, and Seller
conveys to Purchaser, without any additional consideration,  all  claims  Seller
may  have,  to  all  of  the rights and incidents of ownership generated from or
attributable to the Assets prior to  the  Effective Time, including the right to
all oil, gas and other hydrocarbons thereafter produced from or attributable  to
the  Assets,  and  the proceeds thereof, insofar and only insofar as such rights
are attributable to the following:

     (a)  any Title Increase; and

     (b)  any obligations by any party, including but not limited to  Purchaser,
          to  pay  money  that  is  attributable  to  the  Assets  which are, in
          accordance with generally accepted accounting procedures, attributable
          to the period of time before the  Effective Time that were not paid to
          Seller or were not raised before the end  of  the  Closing  adjustment
          process described in Article 11 except as provided otherwise herein.

                                      -19-

    10.4  General Claims.  The  term  "General  Claims"  shall  mean any and all
claims related to or arising out of the ownership of the  Assets  prior  to  the
Effective  Time,  including,  without  limitation  (i) those arising under or by
virtue of any  lease,  contract,  agreement,  document,  permit, applicable law,
statute, rule, regulation or order  of  any  governmental  authority,  and  (ii)
claims  for  personal injury or death, or damage to property arising directly or
indirectly from or incident to,  the  use, occupation, operation, maintenance or
abandonment of or production from  the  Assets,  or  condition  of  the  Assets,
whether  latent  or patent; provided, however, General Claims do not include the
following claims:

     (a)  Claims arising from  or  related  to  a  partial  or  complete loss of
          Marketable Title;

     (b)  Accounting Claims;

     (c)  Environmental Claims;

     (d)  Claims arising from or related to  income  taxes,  Property  Taxes  as
          defined in Section 12.1 and other taxes as described in Section 12.3;

     (e)  Claims arising from or related to the issues raised in the letter from
          SASI  Minerals  Company  dated  February 1, 1995, to Coastal Oil & Gas
          Corporation and Tesoro E&P Company, L.P.

    10.5  Accounting Claims.  The term  "Accounting  Claims"  shall mean any and
all claims related to or arising out of the ownership of the Assets that  Seller
may  have  against  Purchaser  or  Purchaser  may have against Seller related to
Purchase Price adjustments, payment of proceeds derived from the sale of oil and
gas (net of  royalties),  all  expenditures  and  costs  relating  to the Assets
chargeable  under  the  applicable  operating   agreement   including,   without
limitation, all ad valorem, property, production, windfall profit, severance and
similar  taxes  but  excluding  income taxes, any obligations related to gas and
pipeline imbalances, and any similar claims or changes normally accounted for in
the post Closing adjustments described in Sections 11.5, 11.6 and 11.7.

    10.6  Environmental Claims.  The term  "Environmental Claims" shall mean any
and all  claims,  demands,  obligations  or  expenses  of  any  kind  whatsoever
occurring,  arising  out  of  or  relating  to  the Assets prior to or after the
Effective Time and that are related  to  the  obligation to plug and abandon oil
and gas wells or arising out of the Environmental Laws.  The term "Environmental
Laws" means all applicable local, state and federal laws, rules, regulations and
orders regulating or otherwise pertaining to (a) the use, generation, migration,
storage,  removal,  treatment,  remedy,  discharge,   release,   transportation,
disposal,  or clean up of pollutants, contamination, hazardous wastes, hazardous
substances, hazardous materials, toxic  substances  or toxic pollutants, (b) the
soil,  surface  waters,  ground  waters,  land,  stream  sediments,  surface  or
subsurface strata, ambient air and any other environmental medium on or off  any
property, or (c) the environment or health and safety related matters, including
the  following  as  from  time to time amended and all others whether similar or
dissimilar:   the   Comprehensive   Environmental   Response,  Compensation  and
Liability Act of 1980,

                                      -20-

as amended by the Superfund Amendments and  Reauthorization  Act  of  1986,  the
Resource  Conservation  and  Recovery  Act  of  1976, as amended by the Used Oil
Recycling Act of 1980, the Solid Waste  Disposal Act Amendments of 1980, and the
Hazardous  and  Solid  Waste  Amendments  of  1984,  the   Hazardous   Materials
Transportation Act, as amended, the Toxic Substance Control Act, as amended, the
Clean  Air Act, as amended, the Clean Water Act, as amended, and all regulations
promulgated pursuant thereto.

    10.7  Purchaser's Indemnity of  Seller.   At  Closing  and  without  further
action  or  documentation,  Purchaser  and  its  Affiliate,  Coastal  Oil  & Gas
Corporation, shall indemnify and  hold  Seller  and its officers, directors, and
employees  harmless  from  all  claims  arising  out  of   Purchaser's   Assumed
Liabilities except for the gross negligence or willful misconduct on the part of
Seller or an Affiliate of Seller.

    10.8  Seller's  Indemnity  of  Purchaser.   At  Closing  and without further
action or documentation,  Seller  shall  indemnify  and  hold  Purchaser and its
officers, directors and employees  harmless  from  all  claims  arising  out  of
Seller's  Liabilities  except  for the gross negligence or willful misconduct on
the part of Purchaser or an Affiliate of Purchaser.

    10.9  Notice of Claim.   From  and  after  Closing,  any claim for indemnity
hereunder shall be  made  by  written  notice  from  the  party  seeking  to  be
indemnified  ("Indemnified  Party")  to  the  other  party hereto ("Indemnifying
Party"), together with a written description of any claims asserted, stating the
nature and basis of such claim  and,  if ascertainable, the amount thereof.  The
Indemnifying Party shall have a period of thirty (30) days after receipt of such
notice within which to respond to the Indemnified Party or, in  the  case  of  a
claim  which  requires  a  shorter  time  for response, then within such shorter
period as specified by Indemnified Party  in such notice ( "Notice Period").  If
the Indemnifying Party denies its obligation to indemnify or defend such  claim,
the Indemnified Party may defend or compromise the claim as it deems appropriate
without  prejudice to any of Indemnified Party's rights hereunder, with no right
of the  Indemnifying  Party  to  approve  or  disapprove  any  actions  taken in
connection therewith by  the  Indemnified  Party.   If  the  Indemnifying  Party
accepts its obligation to indemnify and defend such claim it shall so notify the
Indemnified  Party  at least five (5) days prior to the expiration of the Notice
Period and undertake  the  defense  or  compromise  of  such  claim with counsel
selected by the Indemnifying Party.  If the Indemnifying  Party  undertakes  the
defense or compromise of such claim, the Indemnified Party shall be entitled, at
its own expense, to participate in such defense.  No compromise or settlement of
any  claim  shall  be made without the prior written approval of the Indemnified
Party, which approval shall not be unreasonably withheld or delayed, unless such
compromise  or  settlement  includes  a  general  and  complete  release  of the
Indemnified Party in  respect  of  the  matter,  with  prejudice,  and  with  no
admission  of  liability on the part of the Indemnified Party and no constraints
on the future conduct of its business.

    10.10  Affect of  Indemnity.   The  indemnities  provided  in this Agreement
shall extend to Seller or Purchaser,  as  the  case  may  be,  their  parent  or
respective Affiliates and any person who at any time has served or is serving as
a director, officer, employee and agent thereof, and each of their

                                      -21-

respective heirs, executors, successors and  assigns  and  shall  apply  to  all
claims  subject  to  indemnity hereunder, including those based on negligence of
any nature, including sole negligence, simple negligence, concurrent negligence,
active negligence, passive negligence, or strict liability.  The indemnification
provisions of this  Article  10  shall  be  in  addition  to any other indemnity
provisions contained in this Agreement,  and  it  is  expressly  understood  and
agreed  that  the terms of this Article 10 shall control over any conflicting or
contradicting  terms  or  provisions   contained   in  this  Agreement  and  the
indemnities provided in this Agreement shall survive Closing.

    10.11  Further  Assurances.   After  Closing,  Seller and Purchaser agree to
take such further  actions  and  to  execute,  acknowledge  and deliver all such
further documents that are necessary or useful in carrying out the  purposes  of
this Agreement or of any document delivered pursuant hereto.

    10.12  Delivery  of  Records.   As soon as reasonably possible but not later
than thirty (30) days after the Closing,  Seller shall deliver copies of all the
Records to Purchaser unless requested otherwise by Purchaser.


                            ARTICLE 11.  ACCOUNTING

    11.1  Closing Adjustments.  With respect to matters that can  be  determined
as  of  the  Closing, Seller shall prepare, in accordance with the provisions of
this Agreement, a  Preliminary  Statement  with  relevant supporting information
setting forth each adjustment to the Purchase Price proposed by Seller.   Seller
shall  submit  the Preliminary Statement to Purchaser, together with all records
or data supporting  the  calculation  of  amounts  presented  on the Preliminary
Statement, no later than ten (10) business days prior to the scheduled  Closing.
Prior  to the Closing, Purchaser and Seller will review the adjustments proposed
by  Seller  in  the  Preliminary  Statement  and  any  adjustments  proposed  by
Purchaser.

    11.2  Strapping and Gauging.  Seller shall  have  caused  the oil and gas in
the storage facilities located on, or utilized in connection with, the Assets to
be measured, gauged or strapped as of the Effective  Time.   Seller  shall  have
caused  the  production  meter  charts (or if such do not exist, the sales meter
charts) on the pipelines transporting oil and gas from the properties to be read
as of such time.  Purchaser  shall  have  the  right  to audit all such gauging,
strapping or chart reading.  The oil and gas in such  storage  facilities  above
the  pipeline  connection  or  through  the  meters  on  the pipelines as of the
Effective Time shall belong  to  Seller,  and  the  oil  and  gas placed in such
storage facilities and production upstream of the  aforesaid  meters  after  the
Effective Time shall belong to Purchaser and become part of the Assets.

    11.3  Adjustments to Purchase Price.  At Closing, appropriate adjustments to
the Purchase Price will be made as follows:

     (a)  The Purchase Price shall be adjusted upward by:

                                      -22-

          (i)    Charges paid by Seller for Seller's working interest percentage
                 share of charges imposed by the applicable operating agreements
                 and the COPAS exhibits attached thereto from the Effective Time
                 to  Closing.  Any such charges for expenditures hereunder shall
                 be subject to applicable limitations  of Section 6.4(f).  It is
                 the intention of the parties that the effect of this subsection
                 (i) shall be  that  Purchaser  shall  not  be  responsible  for
                 charges  to  the  extent  they  are reimbursable to Seller from
                 third parties under applicable joint operating agreements;

          (ii)   any amounts determined to  be  due  Seller pursuant to Sections
                 11.5, 11.6 and 11.7 hereof; and

          (iii)  any  other  amount  agreed  upon  in  writing  by  Seller   and
                 Purchaser.

     (b)  The Purchase Price shall be adjusted downward by:

          (i)    an amount equal to the amount of proceeds derived from the sale
                 of oil and gas, net of royalties and severance taxes paid by or
                 on behalf of Seller, received by Seller and attributable to the
                 Assets   which  are,  in  accordance  with  generally  accepted
                 accounting procedures, attributable to the period of time after
                 the Effective Time;

          (ii)   the  amount  of  the  proceeds  received  by  Seller  from  the
                 disposition of all or any portion of the Assets (with the prior
                 written consent of the Purchaser as provided herein); provided,
                 however, such  amounts  shall  not  include  the Purchase Price
                 received by Seller pursuant to Section 2.1;

          (iii)  such reduction due to Title Defects  as  provided  in  Sections
                 3.6, 3.6.1, 3.7, and 3.8 herein;

          (iv)   all  amounts  due  or  the  market value of oil and gas owed by
                 Seller  to  third  parties  as  of  the  Effective  Time  under
                 contracts  with  respect  to  any  imbalances  existing  at the
                 Effective Time, such value  to  be  determined  by  Seller  and
                 Purchaser,  including  any  severance  taxes and royalties paid
                 thereon, as of the Effective Time;

          (v)    an amount  equal  to  all  expenditures,  liabilities and costs
                 relating to the Properties (including, without limitation,  all
                 ad  valorem,  property,  production, windfall profit, severance
                 and similar taxes, but excluding  income taxes) that are unpaid
                 as of the Closing and assessed for or attributable  to  periods
                 of  time  prior  to  the  Effective Time regardless of how such
                 taxes,  expenditures,  liabilities  and  costs  are  calculated
                 provided that  to  the  extent  the  actual  amounts  cannot be
                 determined prior to the agreement of

                                      -23-

                 Purchaser and Seller with respect to the Preliminary Statement,
                 a reasonable estimate of such taxes, expenditures,  liabilities
                 and costs shall be used;

          (vi)   any amounts determined to be due Purchaser pursuant to Sections
                 11.5, 11.6 and 11.7 hereof; and

          (vii)  any   other  amount  agreed  upon  in  writing  by  Seller  and
                 Purchaser.

    11.4  Actual  Figures.   When available, actual figures will be used for the
adjustments at  Closing.   To  the  extent  actual  figures  are  not available,
estimates will be used subject to final adjustments  as  described  in  Sections
11.5 and 11.6 below.

    11.5  Post-Closing  Adjustments.  A post-Closing adjustment statement (the "
Post-Closing Adjustment Statement")  based  on  the  actual  income and expenses
shall be prepared and delivered by Seller to Purchaser along with all supporting
documentation within one hundred twenty (120) days after the Closing,  proposing
further  adjustments  to  the  Purchase  Price  based  on  the  information then
available.  Seller or Purchaser, as the  case  may  be, shall be given access to
and shall be entitled to review and audit the other party's  records  pertaining
to the computation of amounts claimed in such Post-Closing Adjustment Statement.
Within  sixty  (60) days after receipt of the Post-Closing Adjustment Statement,
the parties hereto  will  use  their  best  efforts  to  agree upon the proposed
adjustments and the Seller or Purchaser, as the case may be, shall  pay  to  the
other such sums as may be agreed to be due.  Any amounts agreed to be due Seller
under this Section 11.5 shall be paid to such party as Seller shall from time to
time direct.

    11.6  Final  Post-Closing  Adjustments.   A  final  post-Closing  adjustment
statement  (the  "Final  Post-Closing Adjustment Statement") based on the actual
income and expenses shall be prepared and delivered by Seller to Purchaser along
with all supporting documentation within two  hundred forty (240) days after the
Closing, proposing further adjustments  to  the  Purchase  Price  based  on  the
information  then  available.  Seller or Purchaser, as the case may be, shall be
given access to and shall  be  entitled  to  review  and audit the other party's
records  pertaining  to  the  computation  of  amounts  claimed  in  such  Final
Post-Closing Adjustment Statement.  Within sixty (60) days after receipt of  the
Final  Post-Closing Adjustment Statement, the parties hereto will use their best
efforts to agree upon the proposed  adjustments  and the Seller or Purchaser, as
the case may be, shall pay to the other such sums as may be agreed  to  be  due.
Any  amounts  agreed  to  be due Seller under this Section 11.6 shall be paid to
such party as Seller shall from time to time direct.

    11.7  Audits.  Each party, upon written notice  to the other, shall have the
right to audit each other's accounts and records relating to this  purchase  and
sale  within  two  hundred forty (240) days following Closing.  All audit claims
must be submitted within two  hundred  forty  (240) days of Closing.  After this
two hundred forty (240) day period, each party is  deemed  to  have  waived  the
right to make any additional Accounting Claims.

                                      -24-

                               ARTICLE 12.  TAXES

    12.1  Apportionment of Ad Valorem and Property Taxes.  All ad valorem taxes,
real property taxes, personal property taxes, and similar obligations concerning
the Assets but excluding income taxes ("Property Taxes") with respect to the tax
period  in  which  the  Effective  Time  occurs  shall  be apportioned as of the
Effective Time between Seller and  Purchaser.   Purchaser shall file or cause to
be filed all required reports and returns incident to  the  Property  Taxes  and
shall  pay  or  cause  to  be  paid to the taxing authorities all Property Taxes
relating to the 1995 tax year.  Seller  or  Purchaser, as the case may be, shall
pay to the other the net of Seller's pro rata portion of Property Taxes less the
amounts for such Property Taxes included in  the  Preliminary  Statement  within
thirty (30) days after receipt of Purchaser's invoice therefor including support
data  evidencing  payment  of  the Property Taxes by Purchaser.  Any adjustments
(refunds or liabilities) for ad valorem  taxes  for  any period of time prior to
the Effective Time shall accrue to Seller.

    12.2  Sales Taxes.  The Purchase Price excludes any  sales  taxes  or  other
taxes  required  to  be paid in connection with the sale of property pursuant to
this Agreement.  Purchaser shall be liable  for  all sales, use and other taxes,
conveyance, transfer and recording fees and real estate transfer stamps or taxes
that may be imposed on any transfer of  property  pursuant  to  this  Agreement.
These taxes shall be collected and remitted under applicable law.

    12.3  Other Taxes.  All taxes (other than income taxes) which are imposed on
or  with  respect to the production of oil, natural gas or other hydrocarbons or
minerals or the receipt  of  proceeds  therefrom  (including  but not limited to
severance, production, and  excise  taxes)  shall  be  apportioned  between  the
parties  based  upon  the  respective shares of production taken by the parties.
Purchaser shall be responsible for paying  or  withholding or causing to be paid
or withheld all such taxes and for filing all statements, returns, and documents
incident thereto.  Seller shall be entitled to all refunds, rebates,  exemptions
(including  state  severance  tax exemptions) or credits and responsible for all
liabilities attributable to the Assets  prior  to the Effective Time.  Purchaser
shall be entitled to all refunds, rebates, exemptions (including state severance
tax exemptions) or credits and responsible for all liabilities  attributable  to
the Assets after the Effective Time.

    12.4  Cooperation.   Each  party  to  this Agreement shall provide the other
party  with  reasonable  access  to  all  relevant  documents,  data  and  other
information which  may  be  required  by  the  other  party  for  the purpose of
preparing tax returns and responding to any audit by  any  taxing  jurisdiction.
Each party to this Agreement shall cooperate with all reasonable requests of the
other party made in connection with contesting the imposition of taxes.  Neither
party  to  this Agreement shall be required at any time to disclose to the other
party any tax return  or  other  confidential  tax  information except as may be
required to comply with any governmental or judicial order, decree or inquiry.

                                      -25-

                            ARTICLE 13.  TERMINATION

    13.1  Right  of  Termination.    This   Agreement   and   the   transactions
contemplated hereby may be terminated at any time at or prior to the Closing:

     (a)  By mutual consent of the parties;

     (b)  By  Purchaser  if all conditions described in Article 8 shall not have
          been met by Closing and such  noncompliance shall not have been caused
          by the actions or inactions of Purchaser or waived by Purchaser;

     (c)  By Seller if all conditions described in Article 7 shall not have been
          met by Closing and such noncompliance shall not have  been  caused  by
          the actions or inactions of Seller or waived by Seller;

     (d)  By  either  Purchaser  or  Seller  in  the event that the combined net
          amount of the Purchase Price  adjustments  in Sections 3.6, 3.6.1, and
          3.7 exceeds ten million dollars ($10,000,000.00);

     (e)  By Purchaser in the event the combined Casualty Losses in Section  3.8
          equals or exceeds Ten Million Dollars ($10,000,000.00).

    13.2  Effect of Termination.  If  this  Agreement  is terminated pursuant to
Section 13.1, this Agreement shall become void and of no further force or effect
(except for the provisions of Sections 4.1(d), 5.1(d), 15.1, 15.2,  15.8,  15.9,
15.10,   15.11,  15.12,  15.15,  15.16  and  15.17,  which  shall  survive  such
termination and continue in  full  force  and  effect).  The termination of this
Agreement does not absolve either party from damages  to  the  other  party  for
breach  thereof.   Upon  any  termination  of this Agreement pursuant to Section
13.1, Seller shall be free immediately  to  enjoy all rights of ownership of the
Assets and to sell, transfer, encumber or otherwise dispose of the Assets to any
party without any restriction.


                              ARTICLE 14.  HSR ACT

This Agreement is subject in all respects to and conditioned upon compliance  by
the  parties with the Hart-Scott Rodino Antitrust Improvements Act of 1976 ("HSR
Act"), and the rules and regulations promulgated pursuant thereto, to the extent
said Act,  rules  and  regulations  are  applicable  to  the  sale  and purchase
contemplated by this Agreement.  The parties shall, at their own  expense,  make
any  necessary  filings  with  and provide such information to the Federal Trade
Commission and  the  Assistant  Attorney  General  in  charge  of  the Antitrust
Division of the Department of Justice as soon as practicable after the execution
of this Agreement.  The parties shall reasonably cooperate with  each  other  in
order that each party may compile and make the necessary filings.

                                      -26-

                           ARTICLE 15.  MISCELLANEOUS

    15.1  Governing   Law.  This  Agreement  and  all  instruments  executed  in
accordance herewith shall be governed by  and interpreted in accordance with the
laws of the State of Texas, without regard to conflict of law rules  that  would
direct  application  of  the  laws of another jurisdiction.  In the event of any
litigation or other proceeding in connection with this Agreement, the prevailing
party shall be entitled  to  recover  its  reasonable  attorney's fees and costs
incurred therein from the other party, in addition to any damages awarded.

    15.2  Entire Agreement.  This Agreement and the Exhibits  hereto  constitute
the  entire  agreement between the parties in regard to the purchase and sale of
the Assets and  supersede  all  prior  agreements, understandings, negotiations,
discussions and representations, whether oral or  written,  of  the  parties  in
regard  to  the  purchase  of the Assets.  No supplement, amendment, alteration,
modification, waiver or termination  of  this  Agreement shall be binding unless
executed in writing by the parties hereto.  No reference to any  Exhibit  herein
is intended to ratify or revive any agreements or contracts described therein.

    15.3  Waiver.  No waiver of any of the provisions of this Agreement shall be
deemed  or  shall constitute a waiver of any other provisions hereof (whether or
not similar),  nor  shall  such  waiver  constitute  a  continuing waiver unless
otherwise expressly provided.

    15.4  Captions.  The captions in the Agreement are for convenience only  and
shall  not  be considered a part of or affect the construction or interpretation
of any provision of this Agreement.

    15.5  Assignability.  Except pursuant to  a  like  kind exchange pursuant to
Section 2.3, neither party hereto shall assign this  Agreement  or  any  of  its
rights  or  obligations hereunder without the prior written consent of the other
party, which consent may be withheld  for  any  or no reason.  Any assignment of
this Agreement made without such consent shall be  void.   Except  as  otherwise
provided  herein,  this Agreement shall be binding upon and inure to the benefit
of the parties hereto  and  their  respective  permitted successors and assigns.
After Closing, Purchaser may assign all  or  part  of  the  Assets  without  the
consent of Seller.

    15.6  Notices.   Any  notice  provided  or  permitted to be given under this
Agreement shall be in writing, and may be served by facsimile, personal delivery
or by registered or certified U.S. mail,  addressed to the party to be notified,
postage prepaid, return receipt requested.  Notice deposited in the mail in  the
manner  hereinabove described shall be deemed to have been given and received on
the date of the delivery as  shown  on  the return receipt.  Notice by facsimile
shall be confirmed by certified or registered mail and shall be deemed given and
received on the date sent unless sent after 5:00 p.m. in which case notice  will
be  deemed  given  and  received on the next business day.  Notice served in any
other manner shall be deemed to  have  been  given and received only if and when
actually received by the addressee.  For purposes of notice,  the  addresses  of
the parties shall be as follows:

                                      -27-

SELLER:

     Tesoro E&P Company, L.P.
     ATTN: Robert W. Oliver
     8700 Tesoro Drive
     San Antonio, Texas  78217
     (210) 828-8484
     (210) 283-2064 (Fax)

PURCHASER:

     Coastal Oil & Gas of Texas, L.P.
     ATTN: Gregory W. Hutson
     Nine Greenway Plaza
     Houston, Texas 77046
     (713) 877-7817
     (713) 297-1353 (Fax)

Each party shall have the right, upon giving three (3) days prior written notice
to the other in the manner hereinabove provided, to change its address.

    15.7  DTPA  Waiver.  To the extent applicable to the Purchaser or the Assets
or any portion thereof,  Purchaser  hereby  waives  the  provisions of the Texas
Deceptive Trade Practices Act, Chapter 17, Subchapter E, Sections 17.41  through
17.63,  inclusive  (other than Section 17.555, which is not waived), Tex. Bus. &
Com. Code.  In order to  evidence  its  ability  to grant such waiver, Purchaser
hereby represents and warrants to Seller that Purchaser (i) is in  the  business
of  seeking or acquiring, by purchase or lease, goods or services for commercial
or business use; (ii) has assets  of  $5  million  or more according to its most
recent financial  statement  prepared  in  accordance  with  generally  accepted
accounting  principles;  (iii)  has  knowledge  and  experience in financial and
business matters  that  enable  it  to  evaluate  the  merits  and  risks of the
transactions contemplated hereby; (iv)  is  not  in  a  significantly  disparate
bargaining position; and (v) that this waiver is a material and integral part of
this Agreement and the consideration thereof.

    15.8  Expenses.   Each  party  shall  be solely responsible for all expenses
incurred  by  it  in   connection   with  the  transaction  (including,  without
limitation, fees and expenses of its own legal counsel and accountants).

    15.9  Severability.  If any term or other provision  of  this  Agreement  is
invalid, illegal or incapable of being enforced under any rule of law, all other
conditions  and  provisions  of this Agreement shall nevertheless remain in full
force and effect so long as the  economic or legal substance of the transactions
contemplated hereby is not affected in a materially adverse manner with  respect
to either party.

                                      -28-

    15.10  Damages.  The  parties waive any rights to punitive and incidental or
consequential damages resulting  from  a  breach  of  this Agreement, including,
without limitation, loss of profits.

    15.11  No Third Party  Beneficiary.   This  Agreement  is  not  intended  to
create, nor shall it be construed to create, any rights in any third party under
doctrines concerning third party beneficiaries.

    15.12  Survival.   The  representations  and warranties of the parties under
this Agreement shall survive Closing.

    15.13  Counterparts.   This  Agreement  may  be  executed  in  one  or  more
counterparts, each of  which  shall  be  deemed  an  original,  but all of which
together shall constitute one and the same instrument.

    15.14  Definitions.  The term "Affiliate" means, as  to  any  party  hereto,
each  Person  that directly or indirectly (through one or more intermediaries or
otherwise) (i) controls such party, (ii)  is  controlled by such party, or (iii)
is controlled by a Person which directly or indirectly controls such party.   As
used  in  this  Section  15.14 only, "control" means the right to exercise fifty
percent (50%) or more of the  voting  rights in the appointment of the directors
or  other  governing  body  of  such  Person;  "Person"  means  an   individual,
corporation,  partnership,  general partner, limited partner, association, joint
stock  company,  trust  or   trustee   thereof,   estate  or  executor  thereof,
unincorporated organization, joint venture, or any  other  legally  recognizable
entity  (Person does not include a court or other governmental unit or agency or
subdivision thereof).

    15.15  Construction of Ambiguity.  In the  event  of any ambiguity in any of
the terms or conditions of this Agreement, including  any  exhibits  hereto  and
whether  or  not  placed of record, such ambiguity shall not be construed for or
against any party hereto on the basis that  such party did or did not author the
same.

    15.16  Waiver Of Jury Trial.  Seller and  Purchaser  do  hereby  irrevocably
waive,  to  the fullest extent permitted by law, any and all right to a trial by
jury in any action, suit or other legal proceeding based upon, arising out of or
relating to this Agreement or the transactions contemplated hereby.

    15.17  Publicity.  Seller and Purchaser  shall  consult with each other with
regard to all press releases and other publicity at  or  prior  to  the  Closing
concerning  this  Agreement and the transactions contemplated hereby and, except
as required by applicable  law  or  the  applicable  rules or regulations of any
governmental body or  stock  exchange,  neither  party  shall  issue  any  press
releases  or  other publicity prior to Closing without the prior written consent
of the other party which consent may not be unreasonably withheld.

    15.18  Access to Records.  Seller  shall  have access during normal business
hours to  Purchaser's  Records  delivered  to  Purchaser  for  seven  (7)  years
following the Closing.

                                      -29-

    15.19  Exhibits.  Exhibits A-1 through N are attached hereto and made a part
hereof.

EXECUTED as of the date first set forth above.
                                        SELLER

                              TESORO E&P COMPANY, L.P.
                              By:  Tesoro Exploration and Production Company,
                                   General Partner


                              By:       /s/  James W. Queen
                              Name:        James W. Queen
                              Title:       Vice President


                                        PURCHASER

                              Coastal Oil & Gas of Texas, L.P.
                              By:  Coastal Oil & Gas Corporation, General
                                   Partner


                              By:       /s/ J. D. Bullock
                              Name:        J. D. Bullock
                              Title:       President


                                        SECTION 10.7 INDEMNITY

                              Coastal Oil & Gas Corporation


                              By:       /s/ J. D. Bullock
                              Name:        J. D. Bullock
                              Title:       President
                              Coastal Oil &  Gas  executes this Agreement solely
                              for the  purpose  of  agreeing  to  the  indemnity
                              provision in Section 10.7 herein.

                                      -30-

                                  EXHIBIT A-1

        ATTACHED TO AND MADE A PART OF THAT PURCHASE AND SALE AGREEMENT

 EFFECTIVE APRIL 1, 1995, BY AND BETWEEN TESORO E&P COMPANY, L.P., SELLER, AND

                  COASTAL OIL & GAS OF TEXAS, L.P., PURCHASER



<CATPION>
                                                                 % Working     % Revenue       Allocated
           Operator               Well Name                       Interest      Interest        $ Value

                                                                                 
GAS UNIT C:
Coastal Oil & Gas Corporation  #1 Guerra-USA Gas Unit C           69.452388     54.170666     2,591,971.00
Coastal Oil & Gas Corporation  #2 Guerra-USA Gas Unit C           69.452388     54.170666       337,544.00
Coastal Oil & Gas Corporation  #3 Guerra-USA Gas Unit C           69.452388     54.170666     5,159,739.00
Coastal Oil & Gas Corporation  #4 Guerra-USA Gas Unit C           69.452388     54.170666     1,483,949.00
Undeveloped Gas Unit C (All Depths)                                                           8,904,305.00
                                                                                            ---------------
TOTAL GAS UNIT C                                                                             18,477,508.00
                                                                                            ---------------

GAS UNIT D:
Coastal Oil & Gas Corporation  #1 Guerra-USA Gas Unit D           70.000000     54.693986     5,542,385.00
Coastal Oil & Gas Corporation  #2 Guerra-USA Gas Unit D           70.000000     54.693986     4,548,915.00
Coastal Oil & Gas Corporation  #3 Guerra-USA Gas Unit D           70.000000     54.693986        66,552.00
Coastal Oil & Gas Corporation  #4 Guerra-USA Gas Unit D           70.000000     54.693986     4,368,491.00
Undeveloped Gas Unit D (All Depths)                                                           7,929,146.00
                                                                                            ---------------
TOTALS GAS UNIT D                                                                            22,455,489.00
                                                                                            ---------------

GAS UNIT E:
Coastal Oil & Gas Corporation  #1 Ramirez-USA Gas Unit E          70.000000     56.338655       505,824.00
Coastal Oil & Gas Corporation  #2 Ramirez-USA Gas Unit E          70.000000     56.338655     6,015,481.00
Coastal Oil & Gas Corporation  #3 Ramirez-USA Gas Unit E          70.000000     56.338655     4,560,801.00
Coastal Oil & Gas Corporation  #4 Ramirez-USA Gas Unit E          70.000000     56.338655     2,631,467.00
Coastal Oil & Gas Corporation  #5 Ramirez-USA Gas Unit E          70.000000     56.338655     4,310,286.00
Coastal Oil & Gas Corporation  #8 Ramirez-USA Gas Unit E          70.000000     56.338655     6,678,047.00
Undeveloped Gas Unit E (All Depths)                                                           8,223,505.00
                                                                                            ---------------
TOTAL GAS UNIT E                                                                             32,925,411.00
                                                                                            ---------------

GAS UNIT F:
Coastal Oil & Gas Corporation  #1 Arriaga et al Gas Unit F  BPO      -0-         1.058185
                                                            APO   17.500000     13.389546         9,126.00
Undeveloped Gas Unit F (All Depths)                                                             132,466.00
                                                                                            ---------------
TOTAL GAS UNIT F                                                                                141,592.00
                                                                                            ---------------

TOTAL                                                                                        74,000,000.00
                                                                                            ===============

                                                                    Page 1 of 6

                                  EXHIBIT A-2

        ATTACHED TO AND MADE A PART OF THAT PURCHASE AND SALE AGREEMENT
       EFFECTIVE APRIL 1, 1995, BY AND BETWEEN TESORO E&P COMPANY, L.P.,
            SELLER, AND COASTAL OIL & GAS OF TEXAS, L.P., PURCHASER


                                   LEASEHOLD

Definitions:

The term "within  the  boundaries  of  a  unit"  means  within  a  tract of land
described by the metes and  bounds  of  a  unit  without  regard  to  the  depth
limitations, if any, of the unit.

"Guerra-U.S.A.  Gas  Unit  C'"  means  the  Guerra-U.S.A.  640 Acre Gas Unit "C"
established in Declaration of Unit dated  June 4, 1991 by Tesoro Exploration and
Production Company and Coastal Oil & Gas Corporation, recorded  in  Volume  636,
Pages  240-246,  Entry  157498  of  the Official Public Records of Starr County,
Texas.

"Guerra-U.S.A. Gas Unit  D'"  means  the  Guerra-U.S.A.  640  Acre  Gas Unit "D"
established in Declaration of Unit dated October 28, 1991 by Tesoro  Exploration
and  Production  Company  and  Coastal Oil & Gas Corporation, recorded in Volume
645, Page 386 of the Official Public Records of Starr County, Texas.

"Ramirez-USA Gas  Unit  E'"  means  the  Ramirez-U.S.A.  352  Acre  Gas Unit "E"
established in Declaration of Unit dated July 5, 1991 by Tesoro Exploration  and
Production  Company  and  Coastal Oil & Gas Corporation, recorded in Volume 645,
Page 67, Entry 089940 of the Official  Public Records of Starr County, Texas and
Volume 451, Page 18, Entry 159607 of the  Official  Records  of  Zapata  County,
Texas.

"Arriaga  et  al  Gas  Unit F'" means the Arriaga et al 161.86 Acre Gas Unit "F"
established in Declaration of Pooled Unit  dated  March 6, 1995 by Coastal Oil &
Gas Corporation and Tesoro E&P Company, L.P., recorded in Volume 519,  Page  19,
Entry 101485, Official Records, Zapata County, Texas.

31044-001A   Oil, Gas and Mineral  Lease  dated  March  19, 1988, by and between
             First State Bank & Trust Co., Mission, Texas, Trustee, Lessor,  and
             Tesoro Petroleum Corporation, Lessee, recorded in Volume 574, Pages
             797-805,  Entry  No. 143134, in the Official Public Records of Real
             Property of Starr County, Texas.

                    1307.13 acres of land, more or less, situated in Porcion 55,
                    Porcion 56, and  Porcion  57,  former  Jurisdiction of Mier,
                    Starr County, Texas, and being that 1707.272 acres  of  land
                    described  on  the  Exhibit "A" attached to said lease, less
                    and except the

                                                                    Page 2 of 6

                    acreage released by Partial Release of Oil, Gas and  Mineral
                    Leases dated September 8, 1992.

                    INSOFAR  AND  ONLY  INSOFAR  as  the  above  listed lease is
                    included within the boundaries of the Guerra-U.S.A. Gas Unit
                    "C" and the Guerra-U.S.A. Gas Unit "D".

31044-001B   Oil, Gas and Mineral  Lease  dated  April  14, 1988, by and between
             Morris Atlas et  al,  Lessor,  and  Tesoro  Petroleum  Corporation,
             Lessee,  recorded  in Volume 577, Pages 36-43, Entry No. 143597, in
             the Official  Public  Records  of  Real  Property  of Starr County,
             Texas.

                    1307.13 acres of land, more or less, situated in Porcion 55,
                    Porcion 56, and Porcion 57,  former  Jurisdiction  of  Mier,
                    Starr  County,  Texas, and being that 1707.272 acres of land
                    described on the Exhibit  "A"  attached  to said lease, less
                    and except the acreage released by Partial Release  of  Oil,
                    Gas and Mineral Leases dated September 8, 1992.

                    INSOFAR  AND  ONLY  INSOFAR  as  the  above  listed lease is
                    included within the boundaries of the Guerra-U.S.A. Gas Unit
                    "C" and the Guerra-U.S.A. Gas Unit "D".

31044-004    Oil, Gas and Mineral Lease  dated  January  5, 1989, by and between
             Gilberto Ramirez, et al, Lessor, and Tesoro Petroleum  Corporation,
             Lessee,  recorded in Volume 407, Pages 659-663, Entry No. 82204, in
             the Official Records of Zapata County, Texas.

                    95.609 acres being within  the boundaries of the Ramirez-USA
                    Gas Unit "E" and being a portion of 100 acres in the form of
                    a square out of the most easterly corner of Tract E of Share
                    11 of Porcion 14, A-34, said Tract E being  more  completely
                    described  in  a Partition of said Share No. 11 in Cause No.
                    400 of the  District  Court  of  Zapata County, Texas, dated
                    5/27/46, and recorded in Volume 2, Page 304 of the  District
                    Court Minutes of Zapata County, Texas.  Said 100 acres being
                    more  particularly  described  in  Exhibit  "A"  attached to
                    lease.

31044-005A   Oil, Gas and Mineral Lease  dated  January  5, 1989, by and between
             Anita  Y.  Yzaguirre,  et  al,   Lessor,   and   Tesoro   Petroleum
             Corporation,  Lessee,  recorded in Volume 407, Pages 664-668, Entry
             No. 82205, in the Official Records of Zapata County, Texas.

                                                                    Page 3 of 6

                    122.661 acres, more  or  less,  being  out  of the southwest
                    portion of Share 29-A, Porcion 14, Abstract 34,  said  Share
                    29-A  being  described in Partition Decree in Cause No. 145,
                    District Court of Zapata County,  Texas, a certified copy of
                    which is recorded in Volume 16, Page 507 of the Deed Records
                    of Zapata County, and said  southwest  122.661  acres  being
                    described  by metes and bounds in that certain "Amendment of
                    Drilling Unit Designation" dated March 20, 1979 and recorded
                    in Volume  225,  Page  375  of  the  Deed  Records of Zapata
                    County, Texas.

                    INSOFAR AND ONLY  INSOFAR  as  the  above  listed  lease  is
                    included  within  the  boundaries  of the Ramirez-U.S.A. Gas
                    Unit "E".

31044-005B   Oil, Gas and Mineral  Lease  dated  June  10,  1989, by and between
             Texas American  Bank-Fort  Worth  Trustee  Under  Trust  No.  5301,
             Lessor,  and  Tesoro  Exploration  and  Production Company, Lessee,
             recorded in  Volume  415,  Pages  91-95,  Entry  No.  83571, in the
             Official Records of Zapata County, Texas.

                    122.661 acres, more or less,  being  out  of  the  southwest
                    portion  of  Share 29-A, Porcion 14, Abstract 34, said Share
                    29-A being described in  Partition  Decree in Cause No. 145,
                    District Court of Zapata County, Texas, a certified copy  of
                    which is recorded in Volume 16, Page 507 of the Deed Records
                    of  Zapata  County,  and  said southwest 122.661 acres being
                    described by metes and bounds  in that certain "Amendment of
                    Drilling Unit Designation" dated March 20, 1979 and recorded
                    in Volume 225, Page  375  of  the  Deed  Records  of  Zapata
                    County, Texas.

                    INSOFAR  AND  ONLY  INSOFAR  as  the  above  listed lease is
                    included within  the  boundaries  of  the Ramirez-U.S.A. Gas
                    Unit "E".

31044-008    Oil and Gas Lease dated July 26,  1989,  but  effective  August  1,
             1989, by and between the United States of America, Serial No. TX NM
             81995,  Lessor,  and  Tesoro  Exploration  and  Production Company,
             Lessee, recorded in Volume 601, Pages 120-127, Entry No. 149071, in
             the Official  Public  Records  of  Real  Property  of Starr County,
             Texas.

                    34.156 acres of land, more or less, out of Porcion 55, Starr
                    County, Texas, within the Falcon Dam Reservoir  adjacent  to
                    and  north  of  the  State  Park, as more fully described in
                    lease, and being the same land depicted on the International
                    Boundary and Water

                                                                    Page 4 of 6

                    Commission Federal Mineral Ownership  Map  of June 1988, No.
                    24308.

                    INSOFAR AND ONLY  INSOFAR  as  the  above  listed  lease  is
                    included  within  the  boundaries  of the Ramirez-U.S.A. Gas
                    Unit "E".

31044-010    Oil  and  Gas  Lease dated June 15, 1981, but effective December 1,
             1981, by and between the United  States of America, Serial No. NM-A
             42853 (TX), Lessor, and Dorothy Gourley, Lessee, recorded in Volume
             636, Page 477 in the Official Public Records of  Real  Property  of
             Starr County, Texas.

                    414.8  acres  of land, more or less, in Starr County, Texas,
                    being a part of Parcel S-1,  Tract 1, acquired by the United
                    States for the Falcon Dam and Reservoir project,  and  being
                    also  that part lying within Porciones 55 and 56 of the area
                    leased by the United States to the State of Texas for use as
                    a public park  by  contract  dated  December  23, 1954.  The
                    414.8 acres are more particularly described in said lease.

                    INSOFAR AND ONLY  INSOFAR  as  the  above  listed  lease  is
                    included within the boundaries of the Guerra-U.S.A. Gas Unit
                    "D" and the Ramirez-U.S.A. Gas Unit "E".

31044-011    Oil, Gas and Mineral  Lease  dated  April  10, 1990, by and between
             Gilberto  Ramirez,  et  al,  Lessor,  and  Tesoro  Exploration  and
             Production Company, Lessee, recorded in Volume 425, Pages  337-341,
             Entry No. 85430, in the Official Records of Zapata County, Texas.

                    45.214  acres being a portion of 100 acres out of Tracts "D"
                    and "E" of Share 11 of Porcion 14, A-34, said Tracts "D" and
                    "E" being more particularly described in a Partition of said
                    Share No. 11  in  Cause  No.  400  of  the District Court of
                    Zapata County, Texas, dated 5/27/46, and recorded in  Volume
                    2,  Page 304 of the District Court Minutes of Zapata County,
                    Texas.  Said 100 acres  being more particularly described in
                    Exhibit "A" attached to lease.

31044-012C   Oil, Gas and Mineral Lease dated April 10, 1990, by and between Ada
             Arriaga, et al,  Lessor,  and  Tesoro  Exploration  and  Production
             Company,  Lessee,  recorded in Volume 429, Pages 770-774, Entry No.
             86373, in the Official Records  of Zapata County, Texas, as amended
             February 18, 1993, by Amendment  to  Oil,  Gas  and  Mineral  Lease
             recorded  in Volume 473, Page 545, Entry No. 93799, in the Official
             Records of Zapata County, Texas.

                                                                    Page 5 of 6

31044-012D   Oil, Gas and Mineral Lease  dated  December 10, 1992, but effective
             April 11, 1993, by and between  Anita  Arriaga  Vera,  Lessor,  and
             Coastal  Oil  &  Gas  Corporation,  Lessee, recorded in Volume 469,
             Pages 239-242, Entry No. 093096,  in the Official Records of Zapata
             County, Texas.

31044-012E   Oil,  Gas  and Mineral Lease dated December 10, 1992, but effective
             April 11, 1993, by and  between Adolfo Arriaga, Lessor, and Coastal
             Oil & Gas  Corporation,  Lessee,  recorded  in  Volume  469,  Pages
             243-246,  Entry  No.  093097,  in  the  Official  Records of Zapata
             County, Texas.

31044-012F   Oil, Gas and Mineral Lease  dated  December 10, 1992, but effective
             April 11, 1993, by and between Adela Arriaga, Lessor,  and  Coastal
             Oil  &  Gas  Corporation,  Lessee,  recorded  in  Volume 469, Pages
             247-250, Entry  No.  093098,  in  the  Official  Records  of Zapata
             County, Texas.

31044-012G   Oil, Gas and Mineral Lease dated January 15,  1993,  but  effective
             April  11, 1993, by and between Margarita R. Arriaga, Individually,
             as Life Tenant and as  Independent  Administratrix of the Estate of
             Antioco Arriaga, Deceased; and Anna Arriaga,  Individually  and  as
             Remainderman  of  the  Life Estate of Margarita R. Arriaga, Lessor,
             and Coastal Oil & Gas  Corporation, Lessee, recorded in Volume 471,
             Page 165, Entry No.  93535,  in  the  Official  Records  of  Zapata
             County, Texas.

                    97.873  acres,  more  or  less, being all of Share No. 36 in
                    Porciones 14 and 15, as  Partitioned to Francisco Medrano in
                    the Partition of Porciones 14, 15, 16 and 17,  by  the  49th
                    District  Court  of  Zapata  County in Cause No. 145, styled
                    Santos Yzaguirre, et al,  vs.   Candelario Ramirez, et al, a
                    certified copy of which appears  of  record  in  Volume  16,
                    Pages   507-525,   Zapata  County  Deed  Records,  to  which
                    reference is here made, and  which Share No. 36 of Porciones
                    14 and 15 is more particularly described in said lease.

31044-018    Compensatory Royalty Agreement dated August 1, 1991, by and between
             the  United  States  of America, Serial No. TX NM 86830, and Tesoro
             Exploration and Production Company,  recorded  in Volume 639, Pages
             450-458, Entry 158241 of  the  Official  Public  Records  of  Starr
             County, Texas.

                    14.53 acres of land, more or less, lying within Porcion  56,
                    A-139,  Juan  Pantaleon Yzaguirre Survey, as depicted on the
                    International Boundary and Water  Commission Map, Falcon Dam
                    Reservoir Area, dated 6/21/54, revised 10/14/55, as recorded
                    in Volume 1, Page 101  of  the  Official  Records  of  Starr
                    County, Texas, and

                                                                    Page 6 of 6

                    being  a strip 300 feet wide lying equally on either side of
                    a center line, as more fully described in said lease.

31044-019    Oil, Gas and Mineral Lease dated effective April 11, 1993, from Abe
             S. Wilson et al, Lessor, to  Coastal Oil & Gas Corporation, Lessee,
             covering 54.786 acres of land, more or less,  out  of  Porcion  14,
             Zapata  County,  Texas,  being  more particularly described in that
             certain Memorandum of Oil,  Gas  and  Mineral Lease dated August 5,
             1992 and recorded in Volume 464, Page 629 of the Official  Records,
             Zapata County, Texas.

31044-020    Oil,  Gas  and  Mineral  Lease  dated  August  5, 1992, from Abe S.
             Wilson, et al, Lessor,  to  Coastal  Oil & Gas Corporation, Lessee,
             covering 4.391 acres of land, more or  less,  out  of  Porcion  14,
             Zapata  County,  Texas,  being  more particularly described in that
             certain Memorandum of Oil,  Gas  and  Mineral Lease dated August 5,
             1992 and recorded in Volume 464, Page 631 of the Official  Records,
             Zapata County, Texas.

31044-003    Oil  and  Gas  Lease  dated February 28, 1983, but effective May 1,
             1983, by and  between  the  United  States  of  America, Serial No.
             NM-A-54933(TX), Lessor, and Susan K. Heller, Lessee.

                    148.6 acres of land, more or less, out of Porcion 55,  being
                    a  part of Parcel S-1, Tract-1, Parcel S-1, Tract 2, and the
                    Right-of-Way of Old U.S.  Hwy.  83 (abandoned), all acquired
                    by the United  States  for  the  Falcon  Dam  and  Reservoir
                    Project as more particularly described in lease.

                    INSOFAR  AND  ONLY  INSOFAR  as  the  above  listed lease is
                    included within the boundaries of the Guerra-U.S.A. Gas Unit
                    "C".
                                                                    Page 1 of 1

                                   EXHIBIT B

        ATTACHED TO AND MADE A PART OF THAT PURCHASE AND SALE AGREEMENT
       EFFECTIVE APRIL 1, 1995, BY AND BETWEEN TESORO E&P COMPANY, L.P.,
            SELLER, AND COASTAL OIL & GAS OF TEXAS, L.P., PURCHASER

                               EXCLUDED PROPERTY

ALL RIGHT, TITLE AND  INTEREST  OF  SELLER  IN  THE BELOW DESCRIBED PROPERTY AND
AGREEMENTS WILL BE RETAINED BY SELLER AND NO INTEREST WILL  BE  CONVEYED  TO  OR
ACQUIRED BY PURCHASER EXCEPT AS PROVIDED FOR IN THE PURCHASE AND SALE AGREEMENT.


1.   Coastal Oil & Gas Corporation # 6 Ramirez-USA Gas Unit "E" well, production
     and related equipment, and the right to drill and produce oil and gas wells
     within  the  contract  area  set  forth  in Joint Operating Agreement dated
     January 14, 1994 between Coastal  Oil & Gas Corporation, Tesoro Exploration
     and Production Company, Sanchez-O'Brien  Oil  &  Gas  Corporation,  Anrosa,
     Ltd.,  San  Juan Oil & Gas No. 1 Ltd., and Saxet Petroleum, Inc. (Peninsula
     Area) Starr County, Texas.

2.   Bob West Field Central Treating Facility

3.   Tesoro Seismic Data

4.   Starr County Gathering System

5.   Starr-Zapata Pipeline

                                                                    Page 1 of 3

                                  EXHIBIT C-1

        ATTACHED TO AND MADE A PART OF THAT PURCHASE AND SALE AGREEMENT
       EFFECTIVE APRIL 1, 1995, BY AND BETWEEN TESORO E&P COMPANY, L.P.,
            SELLER, AND COASTAL OIL & GAS OF TEXAS, L.P., PURCHASER


                  PARTIAL RELEASE OF TRANSPORTATION AGREEMENT

This Partial Release  of  Transportation  Agreement  is  dated  this 26th day of
September, 1995, but effective as of April 1, 1995, and is by and between Tesoro
E&P  Company,  L.P.  ("Tesoro  L.P."),  a  Delaware  limited  partnership,   and
Starr-Zapata Pipe Line, a Texas partnership.

WHEREAS, Tesoro  Exploration  and  Production  Company  and  Coastal  States Gas
Transmission Company ("Coastal States") entered into that certain Transportation
Agreement dated as of February 8, 1994 (the "Transportation Agreement");

WHEREAS, Tesoro Exploration and Production Company assigned its  rights  in  the
Transportation Agreement to Tesoro Petroleum Corporation, effective as of May 1,
1994;

WHEREAS,  Tesoro Petroleum Corporation assigned its rights in the Transportation
Agreement to Tesoro L.P., effective as of May 1, 1994;

WHEREAS, effective April 1, 1995, Tesoro  L.P. sold, assigned and transferred to
Coastal Oil & Gas of Texas, L.P. ("Coastal L.P.") all of  its  interest  in  gas
attributable to the Gas Units described in Schedule 1 attached hereto and made a
part hereof;

WHEREAS,  Coastal  States and Tesoro Natural Gas Company formed the Starr-Zapata
Pipe Line, a Texas partnership  that  now  owns  Coastal States' interest in the
Transportation Agreement; and

WHEREAS,  Tesoro  L.P.  and  Starr-Zapata  Pipe  Line  desire  to  release   the
Transportation  Agreement  insofar as it covers the interests conveyed by Tesoro
L.P. to Coastal L.P. so that Coastal L.P. can dedicate said interests to another
transportation agreement with the Starr-Zapata Pipeline.

NOW, THEREFORE, in  consideration  of  Ten  Dollars  ($10.00) and other valuable
consideration, the receipt of which are hereby  acknowledged,  Tesoro  L.P.  and
Starr-Zapata Pipe Line do hereby

                                                                    Page 2 of 3

release  from  the  Transportation Agreement the tracts of land described by the
metes and bounds of the Gas Units  described in Schedule 1 without regard to the
depth limitations, if any, of such Gas Units.  The Transportation  Agreement  is
adopted, ratified and confirmed as amended herein.

Executed the day first above written.

                              TESORO E&P COMPANY, L.P.
                              By Tesoro Exploration and Production Company
                              its General Partner


                              By:   /s/ Robert W. Oliver
                              Name:  Robert W. Oliver
                              Title: President



                              STARR-ZAPATA PIPE LINE
                              By Coastal States Gas Transmission Company
                              its Managing Partner


                              By: /s/ Michael A. Heim
                                   Michael A. Heim
                                   Executive Vice President


STATE OF TEXAS

COUNTY OF BEXAR

     This  instrument  was acknowledged before me on this 26th day of September,
1995, by  Robert  W.  Oliver,  President  of  Tesoro  Exploration and Production
Company, a Delaware corporation, general partner of Tesoro E&P Company, L.P.,  a
limited partnership, on behalf of said partnership.


                                 /s/ Linda D. Hunter
                              Notary Public in and for the State of Texas


STATE OF TEXAS

COUNTY OF Bexar

     This  instrument  was acknowledged before me on this 26th day of September,
1995 by  Michael  A.  Heim,  Executive  Vice  President  of  Coastal  States Gas
Transmission Company, managing partner of Starr-Zapata Pipeline,  on  behalf  of
said pipeline.


                                 /s/ Linda D. Hunter
                              Notary Public in and for the State of Texas


                                                                    Page 3 of 3


                                   SCHEDULE 1

Attached to and made a  part  of  that certain Partial Release of Transportation
Agreement dated September 26, 1995 by and between Tesoro E&P Company,  L.P.  and
Starr-Zapata Pipe Line

1.   Guerra-USA 640 Acre Gas Unit "C" established in Declaration of  Unit  dated
     June  4, 1991 by Tesoro Exploration and Production Company, and Coastal Oil
     & Gas Corporation, recorded in Volume 636, Page 240, Entry 157498, Official
     Public Records, Starr County, Texas.

2.   Guerra-USA 640 Acre Gas Unit  "D"  established in Declaration of Unit dated
     October 28, 1991 by Tesoro Exploration and Production Company  and  Coastal
     Oil  &  Gas  Corporation, recorded in Volume 645, Page 386, Official Public
     Records, Starr County, Texas.

3.   Ramirez-USA 352 Acre Gas Unit "E"  established in Declaration of Unit dated
     July 5, 1991 by Tesoro Exploration and Production Company and Coastal Oil &
     Gas Corporation, recorded in Volume 645, Page 67,  Entry  089940,  Official
     Public  Records,  Starr County, Texas, and recorded in Volume 451, Page 18,
     Entry 159607, Official Records, Zapata County, Texas.

4.   Arriaga et al 161.86 Acre Gas Unit "F" established in Declaration of Pooled
     Unit dated March 6, 1995 by  Coastal  Oil  & Gas Corporation and Tesoro E&P
     Company, L.P., recorded in Volume 519,  Page  19,  Entry  101485,  Official
     Records, Zapata County, Texas.

                                                                    Page 1 of 3


                                  EXHIBIT C-2

        ATTACHED TO AND MADE A PART OF THAT PURCHASE AND SALE AGREEMENT
       EFFECTIVE APRIL 1, 1995, BY AND BETWEEN TESORO E&P COMPANY, L.P.,
            SELLER, AND COASTAL OIL & GAS OF TEXAS, L.P., PURCHASER


                  PARTIAL ASSIGNMENT OF GAS GATHERING CONTRACT

This Partial Assignment of Gas Gathering Contract (this "Partial Assignment") is
dated this 26 day of September, 1995, but  effective as of April 1, 1995, and is
by and  between  Tesoro  E&P  Company,  L.P.,  a  Delaware  limited  partnership
("Assignor"),  and Coastal Oil & Gas of Texas, L.P., a Texas limited partnership
("Assignee").

WHEREAS, Tesoro  Exploration  and  Production  Company  and  Coastal  Oil  & Gas
Corporation, as Producers, and Starr County Gathering System entered  into  that
certain  Gas Gathering Contract dated as of February 1, 1991 (the "Gas Gathering
Contract");

WHEREAS, Tesoro Exploration and  Production  Company  assigned its rights in the
Gas Gathering Contract to Tesoro Petroleum Corporation, effective as of  May  1,
1994;

WHEREAS,  Tesoro  Petroleum Corporation assigned its rights in the Gas Gathering
Contract to Assignor, effective as of May 1, 1994;

WHEREAS, Assignor sold, assigned  and  transferred  to Assignee, effective April
1,1995, all of its interests in oil and  gas,  among  other  interests,  in  the
tracts  of land contained within the metes and bounds of the Gas Units described
in Schedule 1 attached hereto and  made  part hereof without regard to any depth
limitations, if any, of such units (the "Conveyed Interests"); and

WHEREAS, Assignor and Assignee desire that Assignor  assign  a  portion  of  its
interest  in  the  Gas  Gathering  Contract to Assignee for the transport of gas
attributable to the Conveyed Interests.

NOW, THEREFORE, in  consideration  of  Ten  Dollars  ($10.00) and other valuable
consideration, the receipt of  which  are  hereby  acknowledged,  Assignor  does
hereby  assign  and  transfer  to  Assignee, its successors and assigns, the Gas
Gathering Contract insofar and only insofar as the Gas Gathering Contract covers
the gas attributable to the Conveyed Interests.

Assignee hereby covenants and  agrees  not  to  terminate  or take any action to
cause the termination of the Gas Gathering Contract on or before April 1,  2005,
insofar  and  only  insofar as the Gas Gathering Contract covers gas that may be
produced from the Conveyed Interests.

                                                                    Page 2 of 3


Assignee further agrees that it  will  notify  Assignor of any assignment of its
interest in this Agreement and that  any  assignment  shall  be  made  expressly
subject  to  this Agreement and the assignee expressly agrees to be bound by the
terms hereof  in  writing.   Assignee  does  hereby  adopt  and  ratify  the Gas
Gathering Contract as amended herein.

Executed the date first above written.

                              TESORO E&P COMPANY, L.P.
                              By Tesoro Exploration and Production Company
                              its General Partner


                              By:  /s/ Robert W. Oliver
                              Name:  Robert W. Oliver
                              Title: President



                              COASTAL OIL & GAS OF TEXAS, L.P.
                              By Coastal Oil & Gas Corporation
                              its General Partner


                              By: /s/ Gregory W. Hutson
                                   Gregory W. Hutson
                                   Vice President


STATE OF TEXAS

COUNTY OF BEXAR

     This instrument was acknowledged before  me  on this 26th day of September,
1995, by Robert W.  Oliver,  President  of  Tesoro  Exploration  and  Production
Company,  a Delaware corporation, general partner of Tesoro E&P Company, L.P., a
limited partnership, on behalf of said partnership.


                                /s/  Linda D. Hunter
                              Notary Public in and for the State of Texas


STATE OF TEXAS

COUNTY OF Bexar

     This instrument was acknowledged before me  on this 26th day of September ,
1995 by Gregory W. Hutson, Vice President of Coastal Oil &  Gas  Corporation,  a
Delaware  corporation,  general  partner  of Coastal Oil & Gas of Texas, L.P., a
limited partnership, on behalf of said partnership.


                                /s/ Linda D. Hunter
                              Notary Public in and for the State of Texas


                                                                    Page 3 of 3


                            SCHEDULE 1

Attached to and made a part of  that certain Partial Assignment of Gas Gathering
Contract dated September 26, 1995 by and between Tesoro E&P  Company,  L.P.  and
Coastal Oil & Gas of Texas, L.P.


1.   Guerra-USA 640 Acre Gas Unit  "C"  established in Declaration of Unit dated
     June 4, 1991 by Tesoro Exploration and Production Company, and Coastal  Oil
     & Gas Corporation, recorded in Volume 636, Page 240, Entry 157498, Official
     Public Records, Starr County, Texas.

2.   Guerra-USA  640  Acre Gas Unit "D" established in Declaration of Unit dated
     October 28, 1991 by Tesoro  Exploration  and Production Company and Coastal
     Oil & Gas Corporation, recorded in Volume 645, Page  386,  Official  Public
     Records, Starr County, Texas.

3.   Ramirez-USA  352 Acre Gas Unit "E" established in Declaration of Unit dated
     July 5, 1991 by Tesoro Exploration and Production Company and Coastal Oil &
     Gas Corporation, recorded in  Volume  645,  Page 67, Entry 089940, Official
     Public Records, Starr County, Texas, and recorded in Volume 451,  Page  18,
     Entry 159607, Official Records, Zapata County, Texas.

4.   Arriaga et al 161.86 Acre Gas Unit "F" established in Declaration of Pooled
     Unit  dated  March  6, 1995 by Coastal Oil & Gas Corporation and Tesoro E&P
     Company, L.P., recorded  in  Volume  519,  Page  19, Entry 101485, Official
     Records, Zapata County, Texas.

                                                                    Page 1 of 3


                                  EXHIBIT D-1

        ATTACHED TO AND MADE A PART OF THAT PURCHASE AND SALE AGREEMENT
       EFFECTIVE APRIL 1, 1995, BY AND BETWEEN TESORO E&P COMPANY, L.P.,
            SELLER, AND COASTAL OIL & GAS OF TEXAS, L.P., PURCHASER


                   FIRST AMENDMENT TO GAS TREATMENT AGREEMENT

This First Amendment to Gas Treatment Agreement ("First Amendment") is effective
as of April 1, 1995, by  and  between Coastal Oil & Gas Corporation ("Coastal"),
as Facility Operator, Tesoro E&P Company, L.P. ("Tesoro"), as Facility Supplier,
collectively referred to herein as the "Parties".

WHEREAS, Coastal, as Facility Operator, and Tesoro  Exploration  and  Production
Company, as Facility Supplier, entered into that certain Gas Treatment Agreement
dated effective February 1, 1991 ("Gas Treatment Agreement");

WHEREAS,  Tesoro  Exploration  and Production Company assigned its rights in the
Gas Treatment Agreement to Tesoro Petroleum  Corporation, effective as of May 1,
1994;

WHEREAS, Tesoro Petroleum Corporation assigned its rights in the  Gas  Treatment
Agreement to Tesoro E&P Company, L.P., effective as of May 1, 1994; and

WHEREAS,  Tesoro  E&P Company, L.P., effective April 1, 1995, sold, assigned and
transferred to Coastal Oil & Gas of  Texas,  L.P. all of its interest in oil and
gas, among other interests, in the tracts of land contained within the metes and
bounds of the Gas Units described in Schedule 1 attached hereto and made a  part
hereof  without  regard  to  any  depth  limitations,  if  any,  of  such  units
(the"Conveyed Interest"); and

WHEREAS, Coastal, as Facility Operator, and Tesoro, as Facility Supplier, desire
to  amend  the  Gas  Treatment  Agreement as set forth herein to provide for the
deletion and removal of the  Conveyed  Interest from the Gas Treatment Agreement
so that Coastal Oil & Gas  of  Texas,  L.P.  may  enter  into  a  gas  treatment
agreement  with  Coastal for the processing and treatment of gas attributable to
the Conveyed Interest.

NOW, THEREFORE, in consideration of the terms and provisions hereof, the Parties
do hereby amend the Gas  Treatment  Agreement by deleting and removing therefrom
the gas attributable to the Conveyed Interest.

Except as amended herein, all provisions of the Gas  Treatment  Agreement  shall
remain  unchanged  and in full force and effect.  No representations, memoranda,
agreements or other matters, oral or

                                                                    Page 2 of 3


written, prior to the execution  of  this  First  Amendment shall vary, alter or
interpret the terms hereof.  The terms and provisions of this First Amendment do
not and shall not be interpreted to be a release by  either  Coastal  or  Tesoro
from  any claim which such party may have; provided, however, the conduct of the
Parties from the Effective Date  hereof  shall  be governed by the Gas Treatment
Agreement as amended herein.

Executed the date first above written.

                              COASTAL OIL & GAS CORPORATION
                              as Facility Operator


                              By: /s/ Gregory W. Hutson
                                   Gregory W. Hutson
                                   Vice President


                              TESORO E&P COMPANY, L.P.
                              By Tesoro Exploration and Production Company
                              its General Partner
                              as Facility Supplier

                              By:  /s/ Robert W. Oliver
                              Name:  Robert W. Oliver
                              Title: President

STATE OF TEXAS

COUNTY OF BEXAR

     This instrument was acknowledged before  me  on this 26th day of September,
1995, by Robert W.  Oliver,  President  of  Tesoro  Exploration  and  Production
Company,  a Delaware corporation, general partner of Tesoro E&P Company, L.P., a
limited partnership, on behalf of said partnership.


                                /s/ Linda D. Hunter
                              Notary Public in and for the State of Texas


STATE OF TEXAS

COUNTY OF Bexar

     This instrument was acknowledged before  me  on this 26th day of September,
1995 by Gregory W. Hutson, Vice President of Coastal Oil &  Gas  Corporation,  a
Delaware  corporation,  general  partner  of Coastal Oil & Gas of Texas, L.P., a
limited partnership, on behalf of said partnership.


                                /s/ Linda D. Hunter
                              Notary Public in and for the State of Texas



                                                                    Page 3 of 3

                                   SCHEDULE 1


Attached to and made a part of that First Amendment to Gas  Treatment  Agreement
dated effective April 1, 1995, by and between Coastal Oil & Gas Corporation, and
Tesoro E&P Company, L.P.


1.   Guerra-USA  640  Acre Gas Unit "C" established in Declaration of Unit dated
     June 4, 1991 by Tesoro Exploration  and Production Company, et al, recorded
     in Volume 636, Page 240,  Entry  157498,  Official  Public  Records,  Starr
     County, Texas.

2.   Guerra-USA  640  Acre Gas Unit "D" established in Declaration of Unit dated
     October 28, 1991 by Tesoro  Exploration  and Production Company and Coastal
     Oil & Gas Corporation, recorded in Volume 645, Page  386,  Official  Public
     Records, Starr County, Texas.

3.   Ramirez-USA  352 Acre Gas Unit "E" established in Declaration of Unit dated
     July 5, 1991 by Tesoro Exploration and Production Company and Coastal Oil &
     Gas Corporation, recorded in  Volume  645,  Page 67, Entry 089940, Official
     Public Records, Starr County, Texas, and recorded in Volume 451,  Page  18,
     Entry 159607, Official Records, Zapata County, Texas.

4.   Arriaga et al 161.86 Acre Gas Unit "F" established in Declaration of Pooled
     Unit  dated  March  6, 1995 by Coastal Oil & Gas Corporation and Tesoro E&P
     Company, L.P., recorded  in  Volume  519,  Page  19, Entry 101485, Official
     Records, Zapata County, Texas.

                                                                    Page 1 of 4

                                  EXHIBIT D-2


        ATTACHED TO AND MADE A PART OF THAT PURCHASE AND SALE AGREEMENT
       EFFECTIVE APRIL 1, 1995, BY AND BETWEEN TESORO E&P COMPANY, L.P.,
            SELLER, AND COASTAL OIL & GAS OF TEXAS, L.P., PURCHASER


     As provided in Article 7,  Paragraph  7.7 of this Agreement, Purchaser will
enter into a Gas Treatment Agreement ("New Agreement") as Facility Supplier with
Coastal Oil & Gas Corporation, as  Operator  of  the  Bob  West  Field  Treating
Facility,  in  substantially  the same form as the Gas Treatment Agreement dated
March 2, 1994, effective February 1, 1991 between Coastal Oil & Gas Corporation,
as Facility Operator, and Tesoro Exploration and Production Company, as Facility
Supplier, that will  be  effective  April  1,1995  and  include the below terms,
changes and modifications:

     1.   In Article I - Definitions,  there  will  be  added  a  definition  of
          "Committed  Gas"  which  will  be  defined  as  all of Purchaser's gas
          produced from the lands  described  on  Schedule I attached hereto and
          made a part hereof.

     2.   In Article II - a Schedule "C", identical to the attached Schedule  I,
          will be attached to the New Agreement.

     3.   In  Article  IV  - Delivery and Redelivery of Facility Supplier's Gas,
          Paragraph 4.1 Gas to be Delivered by Facility Supplier, there shall be
          inserted the effective date of April 1, 1995 and the Facility Supplier
          shall deliver all of  its  gas  subject  to  the  New Agreement to the
          delivery points indicated.

     4.   In Article VII - Consideration and Terms  of  Payment,  Paragraph  7.1
          Basic Fee Rate shall be modified  so  as to provide that the basic fee
          rate shall be 10 cents  MCF  for  all  gas  produced  from  the  lands
          described  on  Schedule  "C"  and  delivered to a Facility Inlet Point
          regardless of whether all  or  part  of  the  gas stream is treated or
          bypasses all or part of the Treating Facility.

     5.   In  Article VIII - Term, the initial term shall be 10 years from April
          1, 1995  with  the  Facility  Supplier  being  able  to  terminate the
          agreement prior to the end of the 10 year term  only  after  obtaining
          the  consent  of  the  owners of the majority interest in the Treating
          Facility.

     6.   The New Agreement will provide, where necessary, that in the event the
          Facility does

                                                                    Page 2 of 4


          not have the daily capacity to process all or a  portion  of  Facility
          Supplier's Committed Gas and no group of the Facility owners owning at
          least  a  thirty percent (30%) voting interest elects to expand, alter
          or install additional equipment within a reasonable time to accept and
          process the Committed Gas then that  portion of the Committed Gas that
          cannot be processed by the Facility will  be  released  from  the  New
          Agreement and no longer be Committed Gas.

                                                                    Page 3 of 4

                                   Schedule 1

Attached  to  and  made  a part of that certain Exhibit D-2 to Purchase and Sale
Agreement effective April 1,  1995,  by  and  between  Tesoro E&P Company, L.P.,
Seller, and Coastal Oil & Gas of Texas, L.P., Purchaser.

                  LANDS AND GAS SUBJECT TO TREATING AGREEMENT
All of Facility Supplier gas produced from the lands lying within the boundaries
of the Guerra-USA 640 Acre Gas Unit "C", the Guerra-USA 640 Acre Gas  Unit  "D",
the Ramirez-USA 352 Acre Gas Unit "E" and the Arriaga et al 161.86 Acre Gas Unit
"F".

INSOFAR  AND  ONLY  INSOFAR as the gas is produced from the L-1 sand through the
L-47 sand as identified below:

     The L-1 sand of  the  Lopeno  series  as  found  in  the  Coastal Oil & Gas
     Corporation - Guerra-USA Gas Unit "D" #2 well, Starr County,  Texas,  at  a
     true  vertical  depth  of  8,860  feet  below the surface, being 8,878 feet
     measured depth by directional survey,  down  through but not below the L-47
     sand of the Lopeno series as found in the Coastal Oil & Gas  Corporation  -
     Guerra-USA  Gas  Unit  "D" #2 well, Starr County, Texas, at a true vertical
     depth of 15,112 feet below the surface, being 15,868 feet measured depth by
     directional survey.


Definitions:

The term "within  the  boundaries  of  a  unit"  means  within  a  tract of land
described by the metes and  bounds  of  a  unit  without  regard  to  the  depth
limitations, if any, of the unit.

"Guerra-U.S.A.  Gas  Unit  C'"  means  the  Guerra-U.S.A.  640 Acre Gas Unit "C"
established in Declaration of Unit dated  June 4, 1991 by Tesoro Exploration and
Production Company and Coastal Oil & Gas Corporation, recorded  in  Volume  636,
Pages  240-246,  Entry  157498  of  the Official Public Records of Starr County,
Texas.

"Guerra-U.S.A. Gas Unit  D'"  means  the  Guerra-U.S.A.  640  Acre  Gas Unit "D"
established in Declaration of Unit dated October 28, 1991 by Tesoro  Exploration
and  Production  Company  and  Coastal Oil & Gas Corporation, recorded in Volume
645, Page 386 of the Official Public Records of Starr County, Texas.

"Ramirez-USA Gas  Unit  E'"  means  the  Ramirez-U.S.A.  352  Acre  Gas Unit "E"
established in Declaration of Unit dated July 5, 1991 by Tesoro Exploration  and
Production Company and Coastal

                                                                    Page 4 of 4


Oil  &  Gas  Corporation,  recorded  in Volume 645, Page 67, Entry 089940 of the
Official Public Records of Starr  County,  Texas  and Volume 451, Page 18, Entry
159607 of the Official Records of Zapata County, Texas.

"Arriaga et al Gas Unit F'" means the Arriaga et al 161.86  Acre  Gas  Unit  "F"
established  in  Declaration of Pooled Unit dated March 6, 1995 by Coastal Oil &
Gas Corporation and Tesoro E&P Company,  L.P.,  recorded in Volume 519, Page 19,
Entry 101485, Official Records, Zapata County, Texas.


                                                                    Page 1 of 3


                                  EXHIBIT E-1

        ATTACHED TO AND MADE A PART OF THAT PURCHASE AND SALE AGREEMENT
       EFFECTIVE APRIL 1, 1995, BY AND BETWEEN TESORO E&P COMPANY, L.P.,
            SELLER, AND COASTAL OIL & GAS OF TEXAS, L.P., PURCHASER

                             PERMITTED ENCUMBRANCES

1.   Unrecorded Assignment Affecting  Record  Title  to  Oil  &  Gas Lease dated
     November 19, 1981, effective February 1,  1982,  from  Dorothy  Gourley  to
     Border Exploration Company.  (31044-010)

2.   Unrecorded Assignment of Oil & Gas Leases dated October 19, 1983, effective
     December  1,  1983,  approved  February  6,  1984, from Susan K. Heller and
     husband, Warren H. Heller to Huffco Petroleum Corporation.  (31044-003)

3.   Assignment and Assumption  Agreement  dated  January  1,  1989, from Tesoro
     Petroleum  Corporation  to  Tesoro  Exploration  and  Production   Company,
     recorded in Volume 411, Pages 234-239, Entry 82864, in the Official Records
     of Zapata County, Texas.  (31044-004 & 005A)[AS-001-31044]

4.   Assignment  and  Assumption  Agreement  dated  January 1, 1989, from Tesoro
     Petroleum  Corporation  to  Tesoro   Exploration  and  Production  Company,
     recorded in Volume 594, Pages 245-289, Entry 147435 of the Official  Public
     Records  of  Starr  County and Volume 408, Page 548, Entry No. 82398 of the
     Official Records of Zapata County, Texas.  (31044-001A&B, 002A&B)

5.   Assignment of Record  Title  dated  May  5,  1989,  effective July 1, 1989,
     approved July 20, 1989, from Elf Aquitaine Operating, Inc. (formerly Huffco
     Petroleum Corporation) to Tesoro Exploration and Production Company,  Jaffe
     Energy,  Inc.,  and  Falcon  Aircraft  Conversions,  Inc.  (formerly  Astro
     Exploration,  Inc.),  recorded in Volume 600, Page 302, Entry 148875 of the
     Official Public Records of Starr County, Texas.  (31044-003)

6.   Letter  Agreement  dated  June   27,   1989,  as  amended,  between  Tesoro
     Exploration and Production Company and Coastal Oil &  Gas  Corporation,  as
     amended.

7.   Partial Assignment of Oil, Gas and Mineral Leases dated September 27, 1989,
     effective  September  20,  1989,  from  Tesoro  Exploration  and Production
     Company, to Coastal Oil &  Gas  Corporation,  recorded in Volume 604, Pages
     403-405, Entry 149786 of the Official Public Records of Starr  County,  and
     Volume  417,  Pages  123-125, Entry 83929 of the Official Records of Zapata
     County, Texas.  (31044-001A&B,003,004,005A) [AS-002-31044]

8.   Assignment of Record Title Interest in a Lease for Oil & Gas dated November
     27, 1989, approved  effective  November  1,  1989,  from  Coastal Oil & Gas
     Corporation to Tesoro

                                                                    Page 2 of 3

     Exploration and Production Company, recorded in Volume 628, Pages  029-034,
     Entry  155518  of  the  Official  Public  Records  of  Starr County, Texas.
     (31044-010)

9.   Assignment of Record Title dated  February 27, 1990, approved effective May
     1, 1990, from Tesoro Exploration and Production Company to  Coastal  Oil  &
     Gas Corporation, recorded in Volume 615, Pages 363-367, Entry 152503 of the
     Official Public Records of Starr County, Texas.  (31044-008)

10.  Partial  Assignment  of  Oil,  Gas  and Mineral Lease dated March 15, 1990,
     effective  September  20,  1989,  from  Tesoro  Exploration  and Production
     Company, to Coastal Oil & Gas Corporation, recorded in  Volume  424,  Pages
     669-670,  Entry  85333  of  the  Official  Public Records of Zapata County,
     Texas.  (31044-005B)

11.  Partial Assignment of Oil, Gas  and  Mineral  Lease dated October 17, 1990,
     from Tesoro Exploration and Production  Company,  to  Wallace  Engineering,
     Inc.,  recorded in Volume 433, Pages 636-638, Entry 87045-B of the Official
     Public Records of Zapata County, Texas.  (31044-011,012A-C)

12.  Partial Assignment of Oil, Gas  and  Mineral  Lease dated October 18, 1990,
     from Wallace Engineering, Inc. to Coastal Oil & Gas  Corporation,  recorded
     in Volume 434, Pages 842-844, Entry 87256 of the Official Public Records of
     Zapata County, Texas.  (31044-011, 012A-C)

13.  Gas  Gathering  Contract dated February 1, 1991, between Tesoro Exploration
     and Production Company and Coastal Oil & Gas Corporation, as Producers, and
     Starr County Gathering System, as Buyer.

14.  Partial Assignment  of  Compensatory  Royalty  Agreement  dated October 28,
     1991, from Tesoro Exploration and Production Company to Coastal Oil  &  Gas
     Corporation,  recorded  in  Volume  644,  Page  442,  Entry  159447, in the
     Official  Public  Records  of   Real   Property  of  Starr  County,  Texas.
     (31044-018)

15.  Letter Agreement dated November 15, 1991, between  ANR  Production  Company
     and  Tesoro  Exploration and Production Company providing for conveyance to
     Tesoro of 40% of the Jaffe and Falcon leasehold interest.

16.  Assignment and Bill of Sale  dated  September 12, 1991, effective September
     1, 1991, from Jaffe Energy, Inc. to  ANR  Production  Company  recorded  in
     Volume  640,  Page 740 in the Real Property Records of Starr County, Texas.
     (31044-002A&B,003)[AS-003-31044]

17.  Assignment and Bill of Sale dated November 27, 1991, effective September 1,
     1991, from ANR  Production  Company  to  Tesoro  Exploration and Production
     Company recorded in Volume 645 at Pages 643-646, Entry 159766 in  the  Real
     Property Records of Starr County, Texas.  (31044-002A&B,003)[AS-004-31044]

                                                                    Page 3 of 3

18.  Partial  Release  of  Oil  Gas  and  Mineral  Leases  by  Coastal Oil & Gas
     Corporation and Tesoro Exploration and  Production Company to Lessors dated
     September 8, 1992 recorded in Volume 664, Pages 667-672,  Entry  164102  in
     the Official Public Records of Starr County, Texas (31044-001A&B).

19.  Transportation  Agreement between Tesoro Exploration and Production Company
     and Coastal States Transmission Company dated as of February 8, 1994.

20.  Gas Treatment Agreement  dated  March  2,  1994,  but effective February 1,
     1991, by and between Tesoro Exploration and Production Company and  Coastal
     Oil  & Gas Corporation.  (Processing Tesoro's Bob West Field gas at Central
     Facility)

21.  Partial  Assignment  dated  October  27,  1992,  from  Coastal  Oil  &  Gas
     Corporation to  Tesoro  Exploration  and  Production  Company,  recorded in
     Volume 466, Page 779, Entry 97651 in the Official Records of Starr  County,
     Texas.  (31044-019 & 020)[AS-016-31044]

22.  Partial  Assignment  dated  November  16,  1993,  from  Coastal  Oil  & Gas
     Corporation to Tesoro Exploration and Production Company recorded in Volume
     488,  Page  864  of   the   Official   Records  of  Zapata  County,  Texas.
     [AS-017-31044](31044-012D,E,F&G)

23.  Assignment  and  Assumption  Agreement  dated  May  1,  1994,  from  Tesoro
     Exploration  and  Production  Company  to  Tesoro  Petroleum   Corporation,
     recorded  in Volume 696, Pages 721-744, Entry 171028 of the Official Public
     Records of Starr County and Volume  501,  Pages 380-406, Entry No. 98480 of
     the Official Records of Zapata County, Texas.

24.  Assignment  and  Assumption  Agreement  dated  May  1,  1994,  from  Tesoro
     Petroleum Corporation to Tesoro E&P Company, L.P., recorded in Volume  697,
     Pages  459-482, Entry 171173 of the Official Public Records of Starr County
     and Volume 501, Pages 798-825, Entry  No.  98557 of the Official Records of
     Zapata County, Texas.

25.  Farmout  Agreement  dated  April  25,  1995,  between  Coastal  Oil  &  Gas
     Corporation and Tesoro E&P Company, L.P., covering the Arriaga  et  al  Gas
     Unit "F" in Zapata County, Texas.

                                                                    Page 1 of 1

                                  EXHIBIT E-2

        ATTACHED TO AND MADE A PART OF THAT PURCHASE AND SALE AGREEMENT
       EFFECTIVE APRIL 1, 1995, BY AND BETWEEN TESORO E&P COMPANY, L.P.,
            SELLER, AND COASTAL OIL & GAS OF TEXAS, L.P., PURCHASER


                             UNRECORDED AGREEMENTS

1.   Federal Communitization Agreement, Contract No.  TX  NM 75306 dated June 1,
     1991,  approved  June  28,  1991,  covering  the  Tesoro  Exploration   and
     Production  Company,  et  al - Guerra-U.S.A. 640 Acre Gas Unit C (#2 Guerra
     Well).

2.   Federal Communitization Agreement, Contract No.  TX NM 75311, dated July 1,
     1991,  approved  August  22,  1991  covering  the  Tesoro  Exploration  and
     Production Company,  et  al  -  Ramirez-U.S.A.  352  Acre  Gas  Unit-E  (#1
     Ramirez-U.S.A. Well).

3.   Federal Communitization Agreement, Contract No. TX NM 75320 dated effective
     October  28,  1991.   Approved December 11, 1991 covering the Guerra-U.S.A.
     640 Acre Gas Unit-D (#3 Guerra Well).

4.   Operating Agreement dated  January  14,  1994,  between  Coastal  Oil & Gas
     Corporation, as Operator, and Tesoro Exploration  and  Production  Company,
     Sanchez-O'Brien Oil & Gas Corporation, Anrosa, Ltd., San Juan Oil & Gas No.
     1, Ltd., and Saxet Petroleum Inc., as Non-Operators.  (Peninsula Area)

                                                                    Page 1 of 1

                                   EXHIBIT F

        ATTACHED TO AND MADE A PART OF THAT PURCHASE AND SALE AGREEMENT
       EFFECTIVE APRIL 1, 1995, BY AND BETWEEN TESORO E&P COMPANY, L.P.,
            SELLER, AND COASTAL OIL & GAS OF TEXAS, L.P., PURCHASER


                       LIENS, MORTGAGES AND ENCUMBRANCES

The following instrument  shall  be  released  as  to  the  Assets  with a fully
executed and acknowledged partial release covering the Assets to be delivered to
Purchaser at Closing.

Deed of Trust,  Mortgage,  Assignment  of  Production,  Security  Agreement  and
Financing  Statement dated April 19, 1994, effective April 20, 1994, from Tesoro
Exploration and  Production  Company  to  Stephen  H.  Field,  Trustee for Texas
Commerce Bank National Association, as Agent, which  instrument  was  filed  for
record  April 25, 1994 in Volume 497, Page 340 of the Official Records of Zapata
County, Texas, and in Volume  692,  Page  523  of the Official Public Records of
Real Property of Starr County, Texas.

                                                                    Page 1 of 1


                                   EXHIBIT G

        ATTACHED TO AND MADE A PART OF THAT PURCHASE AND SALE AGREEMENT
       EFFECTIVE APRIL 1, 1995, BY AND BETWEEN TESORO E&P COMPANY, L.P.,
            SELLER, AND COASTAL OIL & GAS OF TEXAS, L.P., PURCHASER


                             LITIGATION AND CLAIMS

1.   Heirs of H. P. Guerra, Deceased  v.   The United States of America, et al.,
     Case No. M-95-041, United  States  District  Court,  Southern  District  of
     Texas, McAllen Division.

2.   Coastal  Oil  &  Gas Corporation, et al. v.  Jose DeLosSantos, et al., Case
     No. 94-12219-L, 193rd Judicial District Court, Dallas County, Texas.

3.   Coastal Oil & Gas Corporation,  et  al.  v.   James W. Collins, Trustee, et
al., Case No. 94-12219-A-L, 193rd Judicial District Court, Dallas County, Texas.

4.   KCS  Resources,  Inc.  v.   Toms  Chapa  Yzaguirre,  et   al.,   Case   No.
     94-12219-B-L, 193rd Judicial District Court, Dallas County, Texas.

Miscellaneous

1.   Letter  dated  February 1, 1995 from SASI Minerals Company to Coastal Oil &
     Gas Corporation and Tesoro E&P Company, L.P.

                                                                    Page 1 of 12

                                   EXHIBIT H

        ATTACHED TO AND MADE A PART OF THAT PURCHASE AND SALE AGREEMENT
       EFFECTIVE APRIL 1, 1995, BY AND BETWEEN TESORO E&P COMPANY, L.P.,
            SELLER, AND COASTAL OIL & GAS OF TEXAS, L.P., PURCHASER


                    ASSIGNMENT, BILL OF SALE AND CONVEYANCE

STATE OF TEXAS

COUNTIES OF STARR AND ZAPATA

     This Assignment,  Bill  of  Sale  and  Conveyance  ("Assignment"), shall be
effective 7:00 a.m.  Central Time, April 1,  1995  ("Effective  Time"),  between
Tesoro  E&P  Company,  L.P.,  a Delaware limited partnership, by and through its
general partner, Tesoro  Exploration  and  Production Company ("Assignor"), 8700
Tesoro Drive, San Antonio, Texas 78217, and Coastal Oil & Gas of Texas, L.P., by
and through its general partner, Coastal Oil  &  Gas  Corporation  ("Assignee"),
Nine Greenway Plaza, Houston, Texas 77046.

     For   Ten   and  No/100  Dollars  ($10.00)  and  other  good  and  valuable
consideration, the receipt and sufficiency  of  which are hereby acknowledged by
Assignor, Assignor hereby assigns and transfers to Assignee  all  of  Assignor's
right,  title  and  interest in the following real and personal property (all of
which are herein called "Assets").

     (a)  All right, title and interest  of Assignor  in and to the oil, gas and
          mineral leasehold and fee estates  (including  all  working  interest,
          farmout  and  farmin  rights,  royalty or other non-working or carried
          interests, operating rights or  other  mineral rights of every nature)
          described in Schedules 1 and 2 (the "Subject Properties");

     (b)  to the extent attributable or allocable  to  the  Subject  Properties,
          except  as  excluded  in  Schedule 3, all right, title and interest of
          Assignor in and to:  (i)  all  oil and gas wells, equipment, supplies,
          machinery, signage, tanks and all  other  real  or  tangible  personal
          property  and  fixtures  which  are located on the Subject Properties,
          excluding portable tools,  vehicles  and  any  other items of personal
          property temporarily located on the Subject Properties owned solely by
          Assignor; (ii) all oil, gas and minerals  produced  on  or  after  the
          Effective  Time;  (iii)  to  the  extent  the  same  are assignable or
          transferable by Assignor, all rights  to and in all orders, contracts,
          title opinions and  documents,  abstracts  of  title,  leases,  deeds,
          unitization   agreements,  pooling  agreements,  operating  agreement,
          division of  interest  statements,  participation  agreements, and all
          other agreements and instruments; (iv) all authorizations  subject

                                                                    Page 2 of 12

          to  the  rights  of  third   parties  (but  excluding  all  easements,
          rights-of-way, licenses and permits); (v) except as expressly provided
          otherwise herein, all warranties, covenants and  representations  from
          third  parties,  and  all  claims, rights and causes of action against
          third parties, asserted and unasserted, known and unknown; (vi) copies
          of all lease files, land files, well files, oil and gas sales contract
          files, gas processing  files,  division  order  files, title files and
          materials, and all other books, files, maps, logs  and  records  other
          than  corporate, financial, tax and legal records of Assignor, and all
          rights thereto, subject to the rights  of third parties; and (vii) all
          other rights, privileges, benefits and powers conferred upon the owner
          and holder of interests in the Subject Properties; and

     (c)  all rights to State severance tax exemptions and Internal Revenue Code
          of  1986,  as  amended,  Section  29  tax  credits attributable to the
          Subject Properties for all periods after the Effective Time.

     All right, title and interest of  the Assignor in the property described on
Schedule 3 is not included in the Assets.  Assignee  will  acquire  no  interest
therein.

     TO HAVE AND TO HOLD the Assets unto Assignee and its successors and assigns
forever  subject  to  the terms herein and reservations and exceptions described
below.

     This Assignment is  made  without  warranty  of  title, express or implied,
except that Assignor binds itself, its successors and  assigns  to  warrant  and
defend title to the Assets against every person claiming or to claim an interest
therein,  by,  through  or  under  Assignor or the Affiliates (defined below) of
Assignor, but not otherwise.  The  term  "Affiliates" means each Person (defined
below) that directly or  indirectly  (through  one  or  more  intermediaries  or
otherwise)  (i)  controls such party, (ii) is controlled by such party, or (iii)
is controlled by a Person which directly or indirectly controls such party.  The
term "control" means the right to  exercise  fifty  percent (50%) or more of the
voting rights in the appointment of the directors or  other  governing  body  of
such  Person.   The term "Person" means an individual, corporation, partnership,
general partner, limited  partner,  association,  joint  stock company, trust or
trustee thereof, estate or executor thereof, unincorporated organization,  joint
venture,  or  any  other  legally recognizable entity (Person does not include a
court or other governmental unit or agency or subdivision thereof)

     Except as expressly set forth  above,  the  Assets are assigned to Assignee
without recourse,  covenant  or  warranty  of  any  kind,  express,  implied  or
statutory.   WITHOUT  LIMITATION  OF THE GENERALITY OF THE IMMEDIATELY PRECEDING
SENTENCE, ASSIGNOR EXPRESSLY DISCLAIMS AND  NEGATES  AS TO PERSONAL PROPERTY AND
FIXTURES, ANY IMPLIED OR EXPRESS WARRANTY OF  MERCHANTABILITY,  ANY  IMPLIED  OR
EXPRESS WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE, AND ANY IMPLIED OR EXPRESS
WARRANTY OF CONFORMITY TO MODELS OR SAMPLES OF MATERIALS,

                                                                    Page 3 of 12

AND  ASSIGNEE  ACCEPTS  SUCH  PERSONAL PROPERTY AND FIXTURES IN THEIR "AS IS AND
WHERE IS" CONDITION.   The  parties  agree  that  to  the  extent required to be
operative, the disclaimers of the warranties contained herein are  "conspicuous"
disclaimers for the purposes of any applicable law, rule or order.

     This  Assignment  shall  bind  and  inure  to  the  benefit of Assignor and
Assignee and their respective successors and assigns.

     All recording references in the Exhibits are to the Official Public Records
of Real Property of Starr County,  Texas  and  to the Official Records of Zapata
County, Texas.

     Assignee, by execution of this Assignment, agrees to be bound by and comply
with the terms and provisions of the leases and agreements referenced herein  to
the  extent  that  they  are now in force or effect and cover and pertain to the
Assets, but nothing contained  herein  shall  ratify  or validate any expired or
otherwise ineffective agreement.

     This Assignment  is  executed  this  25th  day  of  September,  1995, to be
effective as of the Effective Time.


                                        ASSIGNOR

                              TESORO E&P COMPANY, L.P.
                              By Tesoro Exploration and Production Company
                              its General Partner


                              By:  /s/ Robert W. Oliver
                                      Robert W. Oliver
                                      President

                                        ASSIGNEE

                              COASTAL OIL & GAS OF TEXAS, L.P.
                              By Coastal Oil & Gas Corporation
                              its General Partner


                              By:  /s/ Gregory W. Hutson
                                   Gregory W. Hutson
                                   Vice President

                                                                    Page 4 of 12

STATE OF TEXAS

COUNTY OF BEXAR

     This instrument was acknowledged before me on this 25th day  of  September,
1995,  by  Robert  W.  Oliver,  President  of  Tesoro Exploration and Production
Company, a Delaware corporation, general partner  of Tesoro E&P Company, L.P., a
limited partnership, on behalf of said partnership.


                                /s/ Linda D. Hunter
                              Notary Public in and for the State of Texas




STATE OF TEXAS

COUNTY OF Bexar

     This instrument was acknowledged before me on this 25th day  of  September,
1995  by  Gregory  W. Hutson, Vice President of Coastal Oil & Gas Corporation, a
Delaware corporation, general partner of  Coastal  Oil  &  Gas of Texas, L.P., a
limited partnership, on behalf of said partnership.


                                /s/ Linda D. Hunter
                              Notary Public in and for the State of Texas

                                                                    Page 5 of 12

                                   SCHEDULE 1

Attached to and made a part  of  that  certain  Assignment,  Bill  of  Sale  and
Conveyance dated September 25, 1995, by and between Tesoro E&P Company, L.P. and
Coastal Oil & Gas of Texas, L.P.

                                     WELLS


Guerra-USA Gas Unit C #1
Guerra-USA Gas Unit C #2
Guerra-USA Gas Unit C #3
Guerra-USA Gas Unit C #4
Guerra-USA Gas Unit C #7
Guerra-USA Gas Unit D #1
Guerra-USA Gas Unit D #2
Guerra-USA Gas Unit D #3
Guerra-USA Gas Unit D #4
Ramirez-USA Gas Unit E #1
Ramirez-USA Gas Unit E #2
Ramirez-USA Gas Unit E #3
Ramirez-USA Gas Unit E #4
Ramirez-USA Gas Unit E #5
Ramirez-USA Gas Unit E #8
Arriaga et al Gas Unit F #1

                                                                    Page 6 of 12
                                   SCHEDULE 2

Attached to and  made  a  part  of  that  certain  Assignment,  Bill of Sale and
Conveyance dated September 25, 1995, by and between Tesoro E&P Company, L.P. and
Coastal Oil & Gas of Texas, L.P.

                                   LEASEHOLD


Definitions:

The term "within the boundaries  of  a  unit"  means  within  a  tract  of  land
described  by  the  metes  and  bounds  of  a  unit  without regard to the depth
limitations, if any, of the unit.

"Guerra-U.S.A. Gas Unit  C'"  means  the  Guerra-U.S.A.  640  Acre  Gas Unit "C"
established in Declaration of Unit dated June 4, 1991 by Tesoro Exploration  and
Production  Company  and  Coastal Oil & Gas Corporation, recorded in Volume 636,
Pages 240-246, Entry 157498  of  the  Official  Public  Records of Starr County,
Texas.

"Guerra-U.S.A. Gas Unit D'" means  the  Guerra-U.S.A.  640  Acre  Gas  Unit  "D"
established  in Declaration of Unit dated October 28, 1991 by Tesoro Exploration
and Production Company and  Coastal  Oil  &  Gas Corporation, recorded in Volume
645, Page 386 of the Official Public Records of Starr County, Texas.

"Ramirez-USA Gas Unit E'"  means  the  Ramirez-U.S.A.  352  Acre  Gas  Unit  "E"
established  in Declaration of Unit dated July 5, 1991 by Tesoro Exploration and
Production Company and Coastal Oil  &  Gas  Corporation, recorded in Volume 645,
Page 67, Entry 159607 of the Official Public Records of Starr County, Texas  and
Volume  451,  Page  18,  Entry  089940 of the Official Records of Zapata County,
Texas.

"Arriaga et al Gas Unit F'"  means  the  Arriaga  et al 161.86 Acre Gas Unit "F"
established in Declaration of Pooled Unit dated March 6, 1995 by Coastal  Oil  &
Gas  Corporation  and Tesoro E&P Company, L.P., recorded in Volume 519, Page 19,
Entry 101485, Official Records, Zapata County, Texas.

31044-001A   Oil, Gas and Mineral  Lease  dated  March  19, 1988, by and between
             First State Bank & Trust Co., Mission, Texas, Trustee, Lessor,  and
             Tesoro Petroleum Corporation, Lessee, recorded in Volume 574, Pages
             797-805,  Entry  No. 143134, in the Official Public Records of Real
             Property of Starr County, Texas.

                 1307.13 acres of land, more or less, situated  in  Porcion  55,
                 Porcion 56, and Porcion 57, former Jurisdiction of Mier, Starr

                                                                    Page 7 of 12

                 County,  Texas, and being that 1707.272 acres of land described
                 on the Exhibit "A" attached to  said lease, less and except the
                 acreage released by Partial Release of  Oil,  Gas  and  Mineral
                 Leases dated September 8, 1992.

                 INSOFAR  AND ONLY INSOFAR as the above listed lease is included
                 within the boundaries of the Guerra-U.S.A. Gas Unit "C" and the
                 Guerra-U.S.A. Gas Unit "D".

31044-001B   Oil, Gas and Mineral Lease dated April 14,  1988,  by  and  between
             Morris  Atlas  et  al,  Lessor,  and  Tesoro Petroleum Corporation,
             Lessee, recorded in Volume 577,  Pages  36-43, Entry No. 143597, in
             the Official Public Records  of  Real  Property  of  Starr  County,
             Texas.

                 1307.13  acres  of  land, more or less, situated in Porcion 55,
                 Porcion 56, and Porcion 57,  former Jurisdiction of Mier, Starr
                 County, Texas, and being that 1707.272 acres of land  described
                 on  the Exhibit "A" attached to said lease, less and except the
                 acreage released by  Partial  Release  of  Oil, Gas and Mineral
                 Leases dated September 8, 1992.

                 INSOFAR AND ONLY INSOFAR as the above listed lease is  included
                 within the boundaries of the Guerra-U.S.A. Gas Unit "C" and the
                 Guerra-U.S.A. Gas Unit "D".

31044-004   Oil,  Gas  and  Mineral  Lease dated January 5, 1989, by and between
            Gilberto Ramirez, et al,  Lessor,  and Tesoro Petroleum Corporation,
            Lessee, recorded in Volume 407, Pages 659-663, Entry No.  82204,  in
            the Official Records of Zapata County, Texas.

                 95.609 acres being within the boundaries of the Ramirez-USA Gas
                 Unit  "E"  and  being  a  portion of 100 acres in the form of a
                 square out of the most easterly  corner  of Tract E of Share 11
                 of Porcion  14,  A-34,  said  Tract  E  being  more  completely
                 described  in a Partition of said Share No. 11 in Cause No. 400
                 of the District Court  of  Zapata County, Texas, dated 5/27/46,
                 and recorded in Volume  2,  Page  304  of  the  District  Court
                 Minutes  of  Zapata  County,  Texas.  Said 100 acres being more
                 particularly described in Exhibit "A" attached to lease.

31044-005A   Oil, Gas and Mineral Lease dated January 5, 1989,  by  and  between
             Anita   Y.   Yzaguirre,   et   al,  Lessor,  and  Tesoro  Petroleum
             Corporation, Lessee, recorded in

                                                                    Page 8 of 12

             Volume 407, Pages 664-668, Entry No. 82205, in the Official Records
             of Zapata County, Texas.

                 122.661 acres, more or less, being out of the southwest portion
                 of Share 29-A, Porcion 14,  Abstract  34, said Share 29-A being
                 described in Partition Decree in Cause No. 145, District  Court
                 of  Zapata County, Texas, a certified copy of which is recorded
                 in Volume 16, Page 507  of  the  Deed Records of Zapata County,
                 and said southwest 122.661 acres being described by  metes  and
                 bounds in that certain "Amendment of Drilling Unit Designation"
                 dated  March  20,  1979 and recorded in Volume 225, Page 375 of
                 the Deed Records of Zapata County, Texas.

                 INSOFAR AND ONLY INSOFAR as  the above listed lease is included
                 within the boundaries of the Ramirez-U.S.A. Gas Unit "E".

31044-005B   Oil, Gas and Mineral Lease dated June  10,  1989,  by  and  between
             Texas  American  Bank-Fort  Worth  Trustee  Under  Trust  No. 5301,
             Lessor, and  Tesoro  Exploration  and  Production  Company, Lessee,
             recorded in Volume 415,  Pages  91-95,  Entry  No.  83571,  in  the
             Official Records of Zapata County, Texas.

                 122.661 acres, more or less, being out of the southwest portion
                 of  Share  29-A, Porcion 14, Abstract 34, said Share 29-A being
                 described in Partition Decree in  Cause No. 145, District Court
                 of Zapata County, Texas, a certified copy of which is  recorded
                 in  Volume  16,  Page 507 of the Deed Records of Zapata County,
                 and said southwest 122.661  acres  being described by metes and
                 bounds in that certain "Amendment of Drilling Unit Designation"
                 dated March 20, 1979 and recorded in Volume 225,  Page  375  of
                 the Deed Records of Zapata County, Texas.

                 INSOFAR  AND ONLY INSOFAR as the above listed lease is included
                 within the boundaries of the Ramirez-U.S.A. Gas Unit "E".

31044-008   Oil and Gas Lease dated July 26, 1989, but effective August 1, 1989,
            by and between the United States of America, Serial No. TX NM 81995,
            Lessor,  and  Tesoro  Exploration  and  Production  Company, Lessee,
            recorded in Volume 601, Pages 120-127,  Entry  No.  149071,  in  the
            Official Public Records of Real Property of Starr County, Texas.

                                                                    Page 9 of 12

                 34.156 acres of land, more or less, out of  Porcion  55,  Starr
                 County,  Texas, within the Falcon Dam Reservoir adjacent to and
                 north of the State Park, as  more fully described in lease, and
                 being the same land depicted on the International Boundary  and
                 Water  Commission  Federal  Mineral Ownership Map of June 1988,
                 No. 24308.

                 INSOFAR AND ONLY INSOFAR as  the above listed lease is included
                 within the boundaries of the Ramirez-U.S.A. Gas Unit "E".

31044-010   Oil and Gas Lease dated June 15, 1981,  but  effective  December  1,
            1981,  by  and between the United States of America, Serial No. NM-A
            42853 (TX), Lessor, and Dorothy  Gourley, Lessee, recorded in Volume
            636, Page 477 in the Official Public Records  of  Real  Property  of
            Starr County, Texas.

                 414.8  acres  of  land,  more  or less, in Starr County, Texas,
                 being a part of  Parcel  S-1,  Tract  1, acquired by the United
                 States for the Falcon Dam and Reservoir project, and being also
                 that part lying within Porciones 55 and 56 of the  area  leased
                 by  the United States to the State of Texas for use as a public
                 park by contract dated December  23, 1954.  The 414.8 acres are
                 more particularly described in said lease.

                 INSOFAR AND ONLY INSOFAR as the above listed lease is  included
                 within the boundaries of the Guerra-U.S.A. Gas Unit "D" and the
                 Ramirez-U.S.A. Gas Unit "E".

31044-011   Oil,  Gas  and  Mineral  Lease  dated April 10, 1990, by and between
            Gilberto  Ramirez,  et  al,   Lessor,  and  Tesoro  Exploration  and
            Production Company, Lessee, recorded in Volume 425,  Pages  337-341,
            Entry No. 85430, in the Official Records of Zapata County, Texas.

                 45.214 acres being a portion of 100 acres out of Tracts "D" and
                 "E"  of  Share  11 of Porcion 14, A-34, said Tracts "D" and "E"
                 being more particularly described in  a Partition of said Share
                 No. 11 in Cause No. 400 of the District Court of Zapata County,
                 Texas, dated 5/27/46, and recorded in Volume 2, Page 304 of the
                 District Court Minutes of Zapata County, Texas.  Said 100 acres
                 being more particularly described in Exhibit  "A"  attached  to
                 lease.

                                                                   Page 10 of 12

31044-012C   Oil, Gas and Mineral Lease dated April 10, 1990, by and between Ada
             Arriaga,  et  al,  Lessor,  and  Tesoro  Exploration and Production
             Company, Lessee, recorded in  Volume  429, Pages 770-774, Entry No.
             86373, in the Official Records of Zapata County, Texas, as  amended
             February  18,  1993,  by  Amendment  to  Oil, Gas and Mineral Lease
             recorded in Volume 473, Page 545,  Entry No. 93799, in the Official
             Records of Zapata County, Texas.

31044-012D   Oil, Gas and Mineral Lease dated December 10, 1992,  but  effective
             April  11,  1993,  by  and  between Anita Arriaga Vera, Lessor, and
             Coastal Oil &  Gas  Corporation,  Lessee,  recorded  in Volume 469,
             Pages 239-242, Entry No. 093096, in the Official Records of  Zapata
             County, Texas.

31044-012E   Oil,  Gas  and Mineral Lease dated December 10, 1992, but effective
             April 11, 1993, by and  between Adolfo Arriaga, Lessor, and Coastal
             Oil & Gas  Corporation,  Lessee,  recorded  in  Volume  469,  Pages
             243-246,  Entry  No.  093097,  in  the  Official  Records of Zapata
             County, Texas.

31044-012F   Oil, Gas and Mineral Lease  dated  December 10, 1992, but effective
             April 11, 1993, by and between Adela Arriaga, Lessor,  and  Coastal
             Oil  &  Gas  Corporation,  Lessee,  recorded  in  Volume 469, Pages
             247-250, Entry  No.  093098,  in  the  Official  Records  of Zapata
             County, Texas.

31044-012G   Oil,  Gas  and  Mineral Lease dated January 15, 1993, but effective
             April 11, 1993, by and  between Margarita R. Arriaga, Individually,
             as Life Tenant and as Independent Administratrix of the  Estate  of
             Antioco  Arriaga,  Deceased;  and Anna Arriaga, Individually and as
             Remainderman of the Life  Estate  of  Margarita R. Arriaga, Lessor,
             and Coastal Oil & Gas Corporation, Lessee, recorded in Volume  471,
             Page  165,  Entry  No.  93535,  in  the  Official Records of Zapata
             County, Texas.

                 97.873 acres, more  or  less,  being  all  of  Share  No. 36 in
                 Porciones 14 and 15, as Partitioned to Francisco Medrano in the
                 Partition of Porciones 14, 15, 16 and 17, by the 49th  District
                 Court  of  Zapata  County  in  Cause  No.  145,  styled  Santos
                 Yzaguirre,  et  al, vs.  Candelario Ramirez, et al, a certified
                 copy of which appears  of  record  in Volume 16, Pages 507-525,
                 Zapata County Deed Records, to which reference  is  here  made,
                 and  which  Share  No.  36  of  Porciones  14  and  15  is more
                 particularly described in said lease.

31044-018   Compensatory Royalty Agreement dated August  1, 1991, by and between
            the United States of America, Serial No. TX  NM  86830,  and  Tesoro
            Exploration and

                                                                   Page 11 of 12

            Production  Company,  recorded  in  Volume 639, Pages 450-458, Entry
            158241 of the Official Public Records of Starr County, Texas.

                 14.53 acres of land,  more  or  less,  lying within Porcion 56,
                 A-139, Juan Pantaleon Yzaguirre  Survey,  as  depicted  on  the
                 International  Boundary  and  Water  Commission Map, Falcon Dam
                 Reservoir Area, dated 6/21/54, revised 10/14/55, as recorded in
                 Volume 1, Page 101  of  the  Official  Records of Starr County,
                 Texas, and being a strip 300 feet wide lying equally on  either
                 side of a center line, as more fully described in said lease.

31044-019   Oil,  Gas and Mineral Lease dated effective April 11, 1993, from Abe
            S. Wilson et al, Lessor,  to  Coastal Oil & Gas Corporation, Lessee,
            covering 54.786 acres of land, more or  less,  out  of  Porcion  14,
            Zapata  County,  Texas,  being  more  particularly described in that
            certain Memorandum of Oil,  Gas  and  Mineral  Lease dated August 5,
            1992 and recorded in Volume 464, Page 629 of the  Official  Records,
            Zapata County, Texas.

31044-020   Oil, Gas and Mineral Lease dated August 5, 1992, from Abe S. Wilson,
            et  al,  Lessor,  to Coastal Oil & Gas Corporation, Lessee, covering
            4.391 acres of land, more or less, out of Porcion 14, Zapata County,
            Texas, being more particularly  described in that certain Memorandum
            of Oil, Gas and Mineral Lease dated August 5, 1992 and  recorded  in
            Volume 464, Page 631 of the Official Records, Zapata County, Texas.

31044-003   Oil  and  Gas  Lease  dated  February 28, 1983, but effective May 1,
            1983, by  and  between  the  United  States  of  America, Serial No.
            NM-A-54933(TX), Lessor, and Susan K. Heller, Lessee.

                    148.6 acres of land, more or less, out of Porcion 55,  being
                    a  part of Parcel S-1, Tract-1, Parcel S-1, Tract 2, and the
                    Right-of-Way of Old U.S.  Hwy.  83 (abandoned), all acquired
                    by the United  States  for  the  Falcon  Dam  and  Reservoir
                    Project as more particularly described in lease.

                    INSOFAR  AND  ONLY  INSOFAR  as  the  above  listed lease is
                    included within the boundaries of the Guerra-U.S.A. Gas Unit
                    "C".

                                                                   Page 12 of 12

                                   SCHEDULE 3

Attached to and  made  a  part  of  that  certain  Assignment,  Bill of Sale and
Conveyance dated September 25, 1995, by and between Tesoro E&P Company, L.P. and
Coastal Oil & Gas of Texas, L.P.


                               EXCLUDED PROPERTY

ALL RIGHT, TITLE AND INTEREST OF SELLER IN  THE  BELOW  DESCRIBED  PROPERTY  AND
AGREEMENTS  WILL  BE  RETAINED  BY SELLER AND NO INTEREST WILL BE CONVEYED TO OR
ACQUIRED BY PURCHASER EXCEPT AS PROVIDED FOR IN THE PURCHASE AND SALE AGREEMENT.


1.   Coastal Oil & Gas Corporation # 6 Ramirez-USA Gas Unit "E" well, production
     and related equipment, and the right to drill and produce oil and gas wells
     within the contract  area  set  forth  in  Joint  Operating Agreement dated
     January 14, 1994 between Coastal Oil & Gas Corporation, Tesoro  Exploration
     and  Production  Company,  Sanchez-O'Brien  Oil  & Gas Corporation, Anrosa,
     Ltd., San Juan Oil & Gas  No.  1 Ltd., and Saxet Petroleum, Inc. (Peninsula
     Area) Starr County, Texas.

2.   Bob West Field Central Treating Facility

3.   Tesoro Seismic Data

4.   Starr County Gathering System

5.   Starr-Zapata Pipeline

                                                                    Page 1 of 3

                                   EXHIBIT I

        ATTACHED TO AND MADE A PART OF THAT PURCHASE AND SALE AGREEMENT
       EFFECTIVE APRIL 1, 1995, BY AND BETWEEN TESORO E&P COMPANY, L.P.,
            SELLER, AND COASTAL OIL & GAS OF TEXAS, L.P., PURCHASER

                                CONTESTED TAXES

1992 AD VALOREM TAXES

     Ad valorem taxes paid to  Starr  County,  Texas  for calendar year 1992 are
included in litigation pending in Case No. 9512, Coastal Oil &  Gas  Corporation
v.  Starr County Appraisal Review Board; in the 229th Judicial District Court of
Starr  County,  Texas.  The case was filed on September 28, 1992.  In this case,
Coastal Oil & Gas Corporation seeks a refund of excess taxes paid.

1993 AD VALOREM TAXES

     Ad valorem taxes paid to  Starr  County,  Texas  for calendar year 1993 are
also included in litigation  pending  in  Case  No.  9512,  Coastal  Oil  &  Gas
Corporation  v.   Starr  County  Appraisal  District  and Starr County Appraisal
Review Board; in  the  229th  Judicial  District  Court  of Starr County, Texas.
Coastal Oil & Gas Corporation amended the original case on September 23, 1993 to
include taxes paid for 1993.  In this case, Coastal Oil & Gas Corporation  seeks
a  refund  of excess taxes paid.  Ad Valorem taxes due to Zapata County for 1993
may be assessed by the County.

1994 AD VALOREM TAXES

     Ad valorem taxes paid to  Starr  County,  Texas  for calendar year 1994 are
also included in litigation  pending  in  Case  No.  9512,  Coastal  Oil  &  Gas
Corporation  v.   Starr  County  Appraisal  District  and Starr County Appraisal
Review Board; in  the  229th  Judicial  District  Court  of Starr County, Texas.
Coastal Oil & Gas Corporation amended the original case on August  22,  1994  to

                                                                    Page 2 of 3

include taxes due for 1994.  For 1994, Coastal Oil &  Gas  Corporation  withheld
payment  of  $384,899  of  disputed  tax.  Tesoro E&P Company, LP's share of the
disputed tax is $234,711.

     Ad valorem taxes due Zapata County for  1994 are included in Case No. 3441,
Coastal Oil & Gas Corporation v.  Zapata County Appraisal District; in the  49th
District  Court  of  Zapata  County, Texas.  Coastal Oil & Gas Corporation filed
this case on October 18, 1994.   Coastal  Oil & Gas Corporation withheld payment
of $751,146 of the disputed tax.  Tesoro E&P Company, LP's share of the disputed
tax is $457,956.

1995 AD VALOREM TAXES

     Coastal Oil & Gas Corporation  filed  its  notice  of  intent  to  commence
     litigation  on  July  19, 1995 regarding taxes due for 1995.  On August 25,
     1995, Coastal Oil & Gas Corporation  amended Case No. 9512 to challenge the
     tax assessment by Starr County for 1995.

1991-1995 SEVERANCE TAXES

     Presently, only wells C-2 and E-1 have been certified by the Texas Railroad
Commission as producing gas from a tight formation exempt from  the  7.5%  Texas
severance  tax.  However, gas produced from wells drilled into the L-14 and L-15
sands, the L-24, L-25, L-26,  L-27,  L-28,  L-30,  L-31, L-32, L-33, L-34, L-38,
L-39, L-41, L-43, L-44, L-45 and L-46 sands should also be exempt from the Texas
Severance tax.  Tesoro  E&P  Company,  LP  is  waiting  on  Coastal  Oil  &  Gas
Corporation to file the required paperwork with the Texas Railroad Commission to
request exempt status and secure tax refunds from the Texas Comptroller.

     On  February  28,  1995,  Tesoro  E&P  Company,  L.P. and Coastal Oil & Gas
Corporation  filed  protective  severance  tax  refund  claims  for  natural gas
produced from the Bob West Field during the period  of  March  1,  1991  through
November 30, 1991.  These protective claims extend the general four year statute
of  limitation  period  for  filing  severance  tax refund claims.  In addition,
Tesoro E&P Company, LP is waiting on  Coastal  Oil & Gas Corporation to file and
receive severance tax refund

                                                                    Page 3 of 3

claims on the following wells:
WELL      DATE      PRODUCING FROM TIGHT     PRODUCING FROM
          DRILLED   SANDS                    OTHER SANDS

C-1       1993      L-24/25/26/27/28              NO
C-3       1995      L-24/26/28/30/31/32/33/34     YES
D-1       1994      L-24/25/26/27/28/30/31        NO
D-2*      1994      L-34                          YES
D-3       1991      L-30/31/32 (Plugged in 1993)  YES
D-4       1995      L-25/26/27/28/30/31/32/33/34  NO
E-1       1992      L-14                          YES
E-3       1994      L-14/15                       YES
E-4       1994      L-14/15                       YES
E-5       1994      L-14/15                       YES

Seller retains the rights to all tax refunds for all qualified  production  from
the Subject Properties prior to the Effective Date.


*Perforated  at  the  L-34,  L-38, L-39, L-41, L-43, L-45 and L-46.  These sands
should be classified as "tight sands".

                                                                    Page 1 of 1

                                   EXHIBIT J

        ATTACHED TO AND MADE A PART OF THAT PURCHASE AND SALE AGREEMENT
       EFFECTIVE APRIL 1, 1995, BY AND BETWEEN TESORO E&P COMPANY, L.P.,
            SELLER, AND COASTAL OIL & GAS OF TEXAS, L.P., PURCHASER


                              CALLS ON PRODUCTION


                       (There are no calls on Production)

                                                                    Page 1 of 1

                                   EXHIBIT K

        ATTACHED TO AND MADE A PART OF THAT PURCHASE AND SALE AGREEMENT
       EFFECTIVE APRIL 1, 1995, BY AND BETWEEN TESORO E&P COMPANY, L.P.,
            SELLER, AND COASTAL OIL & GAS OF TEXAS, L.P., PURCHASER



                             There is no Exhibit K

                                                                    Page 1 of 7

                                   EXHIBIT L

        ATTACHED TO AND MADE A PART OF THAT PURCHASE AND SALE AGREEMENT
       EFFECTIVE APRIL 1, 1995, BY AND BETWEEN TESORO E&P COMPANY, L.P.,
            SELLER, AND COASTAL OIL & GAS OF TEXAS, L.P., PURCHASER


                          INGRESS AND EGRESS AGREEMENT

     THIS AGREEMENT is dated  and  effective  this  26th day of September, 1995,
between Tesoro E&P Company, L.P., by and through  its  general  partner,  Tesoro
Exploration  and  Production Company ("Tesoro"), and Coastal Oil & Gas of Texas,
L.P., by  and  through  its  general  partner,  Coastal  Oil  &  Gas Corporation
("Coastal").

     WHEREAS, Tesoro and Coastal are  the  owners  of  an  interest  in  certain
drilling  and production pads, flow lines, gathering lines, roads and associated
easements which are  depicted  on  Schedule  1  and  described in the agreements
listed on Schedule 2 ("Properties");

     WHEREAS, the parties desire to enter into an agreement governing the  grant
to each other of reciprocal rights for the use of the Properties and the sharing
of  costs  in connection with their drilling, completing and workover operations
("Operations");

     NOW THEREFORE,  in  consideration  of  the  mutual  promises  and covenants
contained in this Agreement, the parties agree as follows:

     1.  Tesoro grants to Coastal all of its right, title and interest in and to
the drilling and production pads C-1 and D-1 ("conveyed pads") as set  forth  on
Schedule  1  and the flow lines, roads and associated easements used exclusively
in connection with the wells located  on the conveyed pads.  Tesoro reserves the
right to use the conveyed pads, flow lines, roads and associated  easements  and
the  right  of  ingress  and  egress  thereto  in connection with its operations
(provided,  however,  Coastal  shall  have  a  preference  with  respect  to its
production and  available  capacity  in  regard  to  said  flow  lines).  Tesoro
specifically  reserves  the  right  to  directionally drill oil and gas wells to
bottom hole locations under lands that it  owns or leases from the conveyed pads
and to produce such wells.

     2.  Tesoro retains all of its right, title  and  interest  in  and  to  all
remaining drilling  and  production  pads  ("retained  pads")  and  flow  lines,
gathering  lines, roads and associated easements as set forth on Schedules 1 and
2.  Tesoro grants  Coastal  the  right  to  use  the  retained pads, flow lines,
gathering lines, saltwater lines, roads and associated easements and  the  right
of  ingress  and  egress  thereto  in  connection with its operations (provided,
however, Tesoro shall  have  a  preference  with  respect  to its production and
available capacity in regard to said flow lines, gathering lines  and  saltwater
lines).   Coastal  is  specifically granted the right to directionally drill oil
and gas wells to bottom hole locations  under  lands that it owns or leases from
the retained pads and to produce such wells.

                                                                    Page 2 of 7

     3.    With  respect  to  each  of  the conveyed pads and retained pads, the
reciprocal rights granted herein  shall  be  exercised  on an alternating basis,
that is, after one party completes an Operation on a pad or one party  does  not
commence an Operation on a pad within the applicable time period, then the other
party  shall  have  thirty  (30)  days, or forty-eight (48) hours in the event a
drilling, completion or workover  rig  ("rig")  is  on  location, to commence an
Operation on  such  pad;  provided,  however,  if  neither  party  conducts  any
Operations  on  a  pad for four (4) consecutive 30 day periods (i.e. one hundred
twenty (120) day period), then  the  first  party  to  notify the other party in
writing that it desires to conduct an Operation on such pad, shall  have  thirty
(30) days to commence such operation.

     Should  there be existing Operations on a pad at the effective date of this
Agreement, the Operations being conducted shall be allowed to continue until the
completion of  said  Operation.   Subject  to  the  completion  of such existing
Operations, Coastal will have the first option to commence the initial Operation
under this agreement for the conveyed pads,  and  Tesoro  will  have  the  first
option  to  commence the initial Operation under this Agreement for the retained
pads.

     All Operations must  be  commenced  within  the  applicable time period and
shall be continuous with no more than ten (10) days in aggregate of no  activity
from   the   commencement   of   the  Operation  until  the  completion  of  the
Operation.  The parties agree to  cooperate  in  the  event  of an emergency and
adjust the Operations sequence accordingly.

     Notwithstanding anything herein to  the  contrary,  a  party  obligated  to
conduct  an  Operation to preserve a lease or comply with an obligation pursuant
to a lease, farmout/farmin or  other  agreement  will be given a preference with
respect to the order of conducting Operations.

     4.  The parties agree to keep the Properties in good condition  and  repair
and to share maintenance costs of the Properties on the following basis:

     A.   All  maintenance  costs associated with flow lines and gathering lines
          shall be borne by the parties owning said lines;

     B.   All maintenance  costs  associated  with  the  conveyed pads, retained
          pads and shared well equipment shall be borne by the parties based  on
          the number and percentage of ownership of the wells located on the pad
          or  hooked  up  to the shared well equipment (provided that each party
          shall bear all costs  associated  with  conducting operations on their
          respective wells); and

     C.   All maintenance  costs associated with a road shall be  borne  by  the
          parties  based  on the number and percentage of ownership of all wells
          served by the respective road.  Notwithstanding anything herein to the
          contrary, all costs  associated  with  the  main  road (including gate
          guard, if any) leading from the entrance of Rancho Falcon to  the  Bob
          West Field Treating Facility ("Facility") shall be borne by the owners
          of the Facility.

                                                                    Page 3 of 7

No other fees for the rights granted in this Agreement will be charged to either
party except as provided in this paragraph.

     5.  This  Agreement and the Exhibits hereto constitute the entire agreement
of the parties  as  to  the  matters  contained  herein  and supersede all prior
agreements,  understandings,  negotiations,  discussions  and   representations,
whether  oral or written, of the parties.  No supplement, amendment, alteration,
modification, waiver or termination of the Agreement shall be enforceable unless
executed in writing by the  parties  hereto.  No reference to any Exhibit herein
is intended to ratify or revive any agreements described herein.

     6.  All accounting for costs  and  payment  thereof  associated  with  this
Agreement  will  be  in  accordance  with the accounting procedures set forth in
Exhibit C to that certain  Operating  Agreement  dated September 20, 1989 by and
between Tesoro Exploration and Production Company, as Operator, and Coastal  Oil
& Gas Corporation, as Non-Operator.

     7.  This Agreement shall be governed by and construed according to the laws
of  Texas,  without  regard  to the conflicts rules that would apply the laws of
another jurisdiction.

Executed the day first above written.


                              ASSIGNOR:

                              TESORO E&P COMPANY, L.P.
                              By Tesoro Exploration and Production Company
                              its General Partner

                              By:  /s/ Robert W. Oliver
                                      Robert W. Oliver
                                      President

                              ASSIGNEE:

                              COASTAL OIL & GAS OF TEXAS, L.P.
                              By: Coastal Oil & Gas Corporation, its General
                              Partner


                              By:  /s/ Gregory W. Hutson
                                   Gregory W. Hutson
                                   Vice President

                                                                    Page 4 of 7

STATE OF TEXAS

COUNTY OF BEXAR

     This instrument was acknowledged before me  this  26th  day  of  September,
1995,  by  Robert  W.  Oliver,  President  of  Tesoro Exploration and Production
Company, a Delaware corporation, general partner  of Tesoro E&P Company, L.P., a
limited partnership, on behalf of said partnership.


                                /s/ Linda D. Hunter
                              Notary Public in and for the State of Texas



STATE OF TEXAS

COUNTY OF Bexar

     This instrument was acknowledged before me  this  26th  day  of  September,
1995, by Gregory W. Hutson, Vice President of Coastal Oil & Gas Corporation, the
general  partner  of  Coastal  Oil  &  Gas  of  Texas,  L.P.,  a  Texas  limited
partnership, on behalf of said partnership.


                                /s/ Linda D. Hunter
                              Notary Public in and for the State of Texas


                                                                    Page 5 of 7



The item omitted is Schedule 1 of Exhibit L, page 5 of 7.  Schedule 1 is a  plat
of  a portion of Bob West Field, Zapata and Starr Counties, Texas indicating the
pads, flow lines and roads described in the Ingress and Egress Agreement.

                                                                    Page 6 of 7

                                   SCHEDULE 2

                       SURFACE USE & EASEMENT AGREEMENTS


1.   Surface Use  and Easement Agreement dated March 31, 1992, effective January
     10, 1992 between Amando Pena, Sr.  and  wife, Cleotilde R. Pena and Coastal
     Oil & Gas Corporation.  [SA-005-31044](COG 70491)

2.   Memorandum of  Surface Use and Easement Agreement dated effective March 31,
     1992 between Amando Pena, Sr. and wife, Cleotilde R. Pena and Coastal Oil &
     Gas Corporation, recorded in Volume 654, Page  475,  Entry  161702,  Public
     Records, Starr County, Texas.

3.   Amendment  to  Surface  Use  and  Easement Agreement  dated April 16, 1993,
     between Amando Pena, Sr. and wife, Cleotilde  R. Pena and Coastal Oil & Gas
     Corporation, recorded  in  Volume  669,  Page  244,  Entry  165254,  Public
     Records, Starr County, Texas.

4.   Second  Amendment  to  Surface  Use and Easement  Agreement dated April 21,
     1994, between Amando Pena, Sr. and  wife, Cleotilde R. Pena and Coastal Oil
     & Gas Corporation, recorded in Volume 693, Page 441, Entry  170266,  Public
     Records, Starr County, Texas.

5.   Third Amendment to Surface Use  and Easement Agreement dated August 1, 1994
     between  Amando Pena, Sr. and wife, Cleotilde R. Pena and Coastal Oil & Gas
     Corporation, recorded  in  Volume  699,  Page  748,  Public  Records, Starr
     County, Texas.

6.   Easement and Surface  Agreement dated March 10, 1994 between  Amando  Pena,
     Sr.,  et ux and Coastal Oil & Gas Corporation, recorded in Volume 691, Page
     179 of the  Public  Records  of  Starr  County,  Texas.  (Drilling Pads and
     Right-of-Way) [SA-008-31044]

7.   Surface Use Agreement and  Damage  Release  dated  July  29,  1992  between
     Josephine  L.  Jisha,  et al and Coastal Oil & Gas Corporation, recorded in
     Volume 658, Page 80, Public Records, Starr County, Texas.  [SA-006-31044]

8.   Amendment to  Surface Use and  Agreement and Damage Release dated September
     26, 1992, effective July 29, 1992 between Josephine L.  Jisha,  et  al  and
     Coastal  Oil  &  Gas  Corporation,  recorded in Volume 662, Page 305, Entry
     163564, Public Records, Starr County, Texas.

9.   Surface Use Agreement and  Damage  Release  dated  January 13, 1994 between
     Josephine L. Jisha, et al and Coastal Oil & Gas  Corporation,  recorded  in
     Volume   693,  Page  354,  Entry  170238,  Public  Records,  Starr  County,
     Texas.  (Pad for #2 State Park-USA Well) [SA-009-31044] (COG 72337)

                                                                    Page 7 of 7

10.  Surface Use Agreement and  Damage  Release  dated  October 6, 1994, between
     Josephine L. Jisha, et al and Coastal Oil & Gas  Corporation,  recorded  in
     Volume  704,  Page  846, Entry 172873, Public Records, Starr County, Texas.
     [SA-010-31044] (COG 72352)

11.  Salt Water Disposal Well Agreement  dated  June 29, 1993, but effective May
     1, 1993, between Amando Pena, Sr. and wife, Cleotilde R. Pena  and  Coastal
     Oil & Gas Corporation.

                                                                    Page 1 of 7

                                   EXHIBIT M

        ATTACHED TO AND MADE A PART OF THAT PURCHASE AND SALE AGREEMENT
       EFFECTIVE APRIL 1, 1995, BY AND BETWEEN TESORO E&P COMPANY, L.P.,
            SELLER, AND COASTAL OIL & GAS OF TEXAS, L.P., PURCHASER

                        AMENDMENT TO OPERATING AGREEMENT

     This Amendment to Operating  Agreement  effective  April 1, 1995 is entered
into this 26th day of September, 1995 by and between Tesoro  E&P  Company,  L.P.
("Tesoro") and Coastal Oil & Gas Corporation ("Coastal").

     WHEREAS,  Tesoro  Exploration and Production Company, and Coastal Oil & Gas
Corporation, entered into that  certain  Operating Agreement dated September 20,
1989,  as  amended   by   Modification   of   Operatorship   ("Modification   of
Operatorship")  dated  December 3, 1991 appointing Coastal Oil & Gas Corporation
as  Production  Operator  and  Tesoro  Exploration  and  Production  Company  as
Geological Operator ("Operating Agreement"),  covering  the oil, gas and mineral
leases, rights, and interests described therein;

     WHEREAS, Tesoro Exploration and Production Company assigned its  rights  in
the  Operating Agreement to Tesoro Petroleum Corporation, effective as of May 1,
1994;

     WHEREAS, Tesoro Petroleum Corporation assigned  its rights in the Operating
Agreement to Tesoro E&P Company, L.P., effective as of May 1, 1994; and

     WHEREAS, it is the desire of the parties hereto to amend  and  revise  said
Operating  Agreement to provide for a revised Exhibit "A", a revised Exhibit "B"
and to elect Coastal as the Operator under the Operating Agreement.

     NOW,  THEREFORE,  in  consideration  of  the  premises  and  of  the mutual
covenants contained herein, (a) Exhibits "A" and "B" attached to  the  Operating
Agreement  are  hereby  deleted in their entirety and are hereby replaced by the
Revised Exhibit "A" and Revised  Exhibit  "B"  attached hereto as Schedule I and
Schedule II, respectively, and made a part hereof; and (b) Tesoro hereby  elects
Coastal as Operator under the Operating Agreement.

     Except  as herein amended and revised, the Operating Agreement shall remain
in force and effect.  This Agreement  shall  be binding upon the parties hereto,
their successors and assigns.

     Executed on the date first written above.

                                                                    Page 2 of 7

                              COASTAL OIL & GAS CORPORATION


                              By: /s/ Gregory W. Hutson
                                   Gregory W. Hutson
                                   Vice President


                              TESORO E&P COMPANY, L.P.
                              By Tesoro Exploration and Production Company
                              its General Partner


                              By: /s/ Robert W. Oliver
                                    Robert W. Oliver
                                    President

                                                                    Page 3 of 7

STATE OF TEXAS

COUNTY OF Bexar

     This  instrument  was acknowledged before me on this 26th day of September,
1995 by Gregory W. Hutson, Vice  President  of  Coastal Oil & Gas Corporation, a
Delaware corporation, on behalf of said corporation.


                                /s/ Linda D. Hunter
                              Notary Public in and for the State of Texas




STATE OF TEXAS

COUNTY OF BEXAR

     This instrument was acknowledged before me on this 26th day  of  September,
1995  by  Robert  W.  Oliver,  President  of  Tesoro  Exploration and Production
Company, a Delaware corporation, General Partner  of Tesoro E&P Company, L.P., a
limited partnership, on behalf of said partnership.


                                /s/ Linda D. Hunter
                              Notary Public in and for the State of Texas


                                                                    Page 4 of 7

                                   SCHEDULE I

Attached to and made a part of that certain  Amendment  to  Operating  Agreement
effective April 1, 1995, by and between Coastal Oil & Gas Corporation and Tesoro
E&P Company, L.P.


                              REVISED EXHIBIT "A"


Attached  to and made a part of that certain Operating Agreement dated September
20, 1989, as amended, by and between Coastal Oil & Gas Corporation, as Operator,
and Tesoro E&P Company, L.P., as Non-Operator.


1.  IDENTIFICATION OF LANDS SUBJECT TO THIS AGREEMENT:

  All of those  lands  and  the  lease  identified  on  the  Revised Exhibit "B"
  attached hereto

2.  RESTRICTIONS, IF ANY, AS TO DEPTHS, FORMATIONS OR SUBSTANCES:

  None as to the parties hereto; however, see the lease for lease restrictions.

3.  PERCENTAGES OR FRACTIONAL INTERESTS OF THE PARTIES:

          Tesoro E&P Company, L.P.           70%
          Coastal Oil & Gas Corporation      30%

4.  OIL AND GAS LEASES AND/OR OIL AND GAS INTERESTS SUBJECT TO THIS AGREEMENT:

     a.  The lease shown on the Revised Exhibit "B" attached hereto as  Schedule
         II.

     b.  The  Surface  Use,  Easement,  and Damage  Release Agreements listed on
         Exhibit "B-2" attached hereto.

5.  ADDRESSES OF THE PARTIES FOR NOTICE PURPOSES:

          Tesoro E&P Company L.P.       Coastal Oil & Gas Corporation
          8700 Tesoro Drive             P. O. Box 521
          San Antonio, Texas 78217      Corpus Christi, Texas 78403-0521

                                                                    Page 5 of 7

                                  SCHEDULE II

Attached to and made a  part  of  that  certain Amendment to Operating Agreement
effective April 1, 1995, by and between Coastal Oil & Gas Corporation and Tesoro
E&P Company, L.P.


                              REVISED EXHIBIT "B"

Attached to and made a part of that certain  Amendment  to  Operating  Agreement
effective April 1, 1995, by and between Coastal Oil & Gas Corporation and Tesoro
E&P Company, L.P.


31044-010 Oil and Gas Lease dated June 15, 1981, but effective December 1, 1981,
          by  and  between  the  United States of America, Serial No. NM-A 42853
          (TX), Lessor, and  Dorothy  Gourley,  Lessee,  recorded in Volume 636,
          Page 477 in the Official Public Records  of  Real  Property  of  Starr
          County, Texas.

          414.8  acres  of  land,  more or less, in Starr County, Texas, being a
          part of Parcel S-1, Tract  1,  acquired  by  the United States for the
          Falcon Dam and Reservoir project,  and  being  also  that  part  lying
          within  Porciones 55 and 56 of the area leased by the United States to
          the State of Texas for use as a public park by contract dated December
          23, 1954.  The 414.8  acres  are  more  particularly described in said
          lease.

          INSOFAR AND ONLY INSOFAR as the  above  listed  lease  covers  198.004
          acres,  more or less, that is not included in and is lying outside the
          boundaries of the Guerra 352 Acre  Gas Unit "A", the Guerra-U.S.A. 640
          Acre Gas Unit "D" and the Ramirez-U.S.A. 352  Acre  Gas  Unit  "E"  in
          Starr and Zapata Counties, Texas.

                                                                    Page 6 of 7

                                  EXHIBIT B-2
                  TO REVISED EXHIBIT A TO OPERATING AGREEMENT
                            DATED SEPTEMBER 20, 1989

                       SURFACE USE & EASEMENT AGREEMENTS


1.  Surface Use and Easement  Agreement  dated March 31, 1992, effective January
    10, 1992 between Amando Pena, Sr. and wife, Cleotilde R.  Pena  and  Coastal
    Oil & Gas Corporation.  [SA-005-31044](COG 70491)

2.  Memorandum  of Surface  Use and Easement Agreement dated effective March 31,
    1992 between Amando Pena, Sr. and wife,  Cleotilde R. Pena and Coastal Oil &
    Gas Corporation, recorded in Volume 654,  Page  475,  Entry  161702,  Public
    Records, Starr County, Texas.

3.  Amendment  to  Surface  Use  and  Easement  Agreement dated  April 16, 1993,
    between Amando Pena, Sr. and wife,  Cleotilde  R. Pena and Coastal Oil & Gas
    Corporation, recorded in Volume 669, Page 244, Entry 165254, Public Records,
    Starr County, Texas.

4.  Second Amendment to Surface Use and Easement Agreement dated April 21, 1994,
    between Amando Pena, Sr. and wife, Cleotilde R. Pena and Coastal Oil  &  Gas
    Corporation, recorded in Volume 693, Page 441, Entry 170266, Public Records,
    Starr County, Texas.

5.  Third  Amendment to  Surface Use and Easement Agreement dated August 1, 1994
    between Amando Pena, Sr. and wife,  Cleotilde  R. Pena and Coastal Oil & Gas
    Corporation, recorded in Volume 699, Page 748, Public Records, Starr County,
    Texas.

6.  Easement and Surface Agreement dated March 10,  1994  between  Amando  Pena,
    Sr.,  et  ux and Coastal Oil & Gas Corporation, recorded in Volume 691, Page
    179 of the  Public  Records  of  Starr  County,  Texas.   (Drilling Pads and
    Right-of-Way) [SA-008-31044]

7.  Surface Use Agreement  and  Damage  Release  dated  July  29,  1992  between
    Josephine  L.  Jisha,  et  al and Coastal Oil & Gas Corporation, recorded in
    Volume 658, Page 80, Public Records, Starr County, Texas.  [SA-006-31044]

8.  Amendment to Surface Use  and  Agreement  and Damage Release dated September
    26, 1992, effective July 29, 1992 between Josephine  L.  Jisha,  et  al  and
    Coastal  Oil  &  Gas  Corporation,  recorded  in Volume 662, Page 305, Entry
    163564, Public Records, Starr County, Texas.

9.  Surface Use Agreement  and  Damage  Release  dated  January 13, 1994 between
    Josephine L. Jisha, et al and Coastal Oil &  Gas  Corporation,  recorded  in
    Volume  693,  Page  354,  Entry

                                                                    Page 7 of 7

    170238, Public Records, Starr  County,  Texas.   (Pad  for #2 State Park-USA
    Well) [SA-009-31044] (COG 72337)

10. Surface Use  Agreement and Damage Release dated  October  6,  1994,  between
    Josephine  L.  Jisha,  et  al and Coastal Oil & Gas Corporation, recorded in
    Volume 704, Page 846,  Entry  172873,  Public  Records, Starr County, Texas.
    [SA-010-31044] (COG 72352)

11. Salt Water  Disposal Well Agreement dated June 29, 1993, but  effective  May
    1,  1993,  between  Amando Pena, Sr. and wife, Cleotilde R. Pena and Coastal
    Oil & Gas Corporation.

                                                                    Page 1 of 2

                                   EXHIBIT N

        ATTACHED TO AND MADE A PART OF THAT PURCHASE AND SALE AGREEMENT
       EFFECTIVE APRIL 1, 1995, BY AND BETWEEN TESORO E&P COMPANY, L.P.,
            SELLER, AND COASTAL OIL & GAS OF TEXAS, L.P., PURCHASER

                  TERMINATION OF MODIFICATION OF OPERATORSHIP
                      Chaparral Prospect/Condado Prospect
                                 Bob West Field
                         Starr & Zapata Counties, Texas

     WHEREAS, Tesoro Exploration and  Production  Company  and Coastal Oil & Gas
Corporation entered into a Modification of Operatorship Agreement ("Modification
of Operatorship") dated December 3, 1991,  that,  among  other  things,  amends,
modifies,   or   affects  the  below  listed  Operating  Agreements  ("Operating
Agreements") covering properties  in  the  Bob  West  Field  in Starr and Zapata
Counties, Texas:

     1.   Operating  Agreement  dated  September  20,   1989,   between   Tesoro
          Exploration and Production Company, as Operator, and Coastal Oil & Gas
          Corporation, as Non-Operator.

     2.   Operating Agreement dated December 1, 1990, between Tesoro Exploration
          and   Production   Company,   as  Operator,  and  Coastal  Oil  &  Gas
          Corporation, Jaffe Energy, Inc. and Falcon Aircraft Conversions, Inc.,
          as Non-Operators (USA-Guerra Gas Unit "B").

     3.   Operating Agreement dated  March  1,  1994,  but effective October 10,
          1991, between Coastal Oil & Gas Corporation, as Operator,  and  Tesoro
          Exploration  and  Production  Company  and  KCS  Resources,  Inc.,  as
          Non-Operators (Guerra Gas Unit "A").

     4.   Operating  Agreement  dated  March  1,  1994, but effective October 3,
          1993, between Coastal Oil &  Gas  Corporation, as Operator, and Tesoro
          Exploration  and  Production  Company  and  KCS  Resources,  Inc.,  as
          Non-Operators (USA-Guerra Gas Unit "B").

     WHEREAS, Tesoro Exploration and Production Company, assigned its rights  in
the  Operating  Agreements  and Modification of Operatorship to Tesoro Petroleum
Corporation, effective as of May 1, 1994; and

     WHEREAS, Tesoro Petroleum Corporation assigned  its rights in the Operating
Agreements and  Modification  of  Operatorship  to  Tesoro  E&P  Company,  L.P.,
effective as of May 1, 1994; and

                                                                    Page 2 of 2

     WHEREAS,  it  is  the  desire  of  the  parties  hereto  to  terminate  the
Modification  of  Operatorship as set forth herein and to name Coastal Oil & Gas
Corporation as Operator under the Operating Agreements.

     NOW,  THEREFORE,  in  consideration  of  the  premises  and  of  the mutual
covenants contained herein:  (a) the  Modification  of  Operatorship  is  hereby
terminated  and  the Operating Agreements are hereby amended to delete therefrom
any reference to the  Modification  of  Operatorship  except as to the following
provisions that shall remain in full force and effect to-wit:

     Tesoro and Coastal shall coordinate their efforts to obtain  the  agreement
     of Tennessee to pay Tesoro's net revenue interest directly to Tesoro and to
     pay  the  remaining  proceeds  from  the  sale  of  production purchased by
     Tennessee to Coastal.

     Tesoro and  Coastal  shall  continue  to  jointly  prosecute  the Tennessee
     lawsuit; provided, however, either party may settle its claims  upon  terms
     it determines to be reasonable.

and (b) Tesoro hereby elects Coastal as Operator under the Operating Agreements.

     The  rights and duties of the parties hereto under the Operating Agreements
shall remain as provided  for  therein  except  as  specifically amended by this
Agreement and the Operating Agreements shall remain in force and  effect.   This
Agreement  shall  be  binding  upon  the  parties  hereto,  their successors and
assigns.

     EXECUTED this 26th day of September, 1995.

                              COASTAL OIL & GAS CORPORATION


                              By: /s/ Gregory W. Hutson
                                   Gregory W. Hutson
                                   Vice President


                              TESORO E&P COMPANY, L.P.
                              By Tesoro Exploration and Production Company
                              its General Partner


                              By: /s/ Robert W. Oliver
                                    Robert W. Oliver
                                    President

STATE OF TEXAS

COUNTY OF Bexar

     This instrument was acknowledged before  me  on this 26th day of September,
1995 by Gregory W. Hutson, Vice President of Coastal Oil &  Gas  Corporation,  a
Delaware corporation, on behalf of said corporation.


                                /s/ Linda D. Hunter
                              Notary Public in and for the State of Texas




STATE OF TEXAS

COUNTY OF BEXAR

     This  instrument  was acknowledged before me on this 26th day of September,
1995 by  Robert  W.  Oliver,  President  of  Tesoro  Exploration  and Production
Company, a Delaware corporation, General Partner of Tesoro E&P Company, L.P.,  a
limited partnership, on behalf of said partnership.


                                /s/ Linda D. Hunter
                              Notary Public in and for the State of Texas