PROPERTY PURCHASE AGREEMENT


     THIS PROPERTY PURCHASE  AGREEMENT (this "Agreement") is made as of the 23rd
day of April,  2002,  by and between  Gasco  Energy,  Inc.  ("Gasco"),  a Nevada
corporation  whose  address is 14 Inverness  Drive East,  Suite 236,  Englewood,
Colorado  80112,  and Shama Zoe Limited  Partnership  ("Shama  Zoe"), a Colorado
limited partnership whose address is 7128 South Poplar Lane, Englewood, Colorado
80112.  Shama Zoe was formerly  known as Shama Kafar  Limited  Partnership,  and
certain lease files and other official  property  records do not yet reflect the
name  change  from Shama  Kafar  Limited  Partnership.  In  addition,  Shama Zoe
occasionally  does  business  under the trade name  "Alpine  Gas  Company,"  and
certain assets may be held in the name of Alpine Gas Company.  For the avoidance
of doubt,  reference in this  Agreement  to Shama Zoe and to the Property  shall
always include Shama Kafar and Alpine Gas Company,  as well as the properties of
Shama Kafar and Alpine Gas Company.

                                    ARTICLE I
                                  PROPERTY SALE

     1.1 The Property.  Subject to the exceptions and reservations  specifically
set forth in Section 1.3 below,  the term  "Property" as used in this  Agreement
refers  to all of the  right,  title  and  interest  of Shama  Zoe in and to the
following:

          (a) All oil and gas  interests  now  owned  by Shama  Zoe in  Sublette
     County, Wyoming,  including,  without limitation,  those created by the oil
     and gas  leases  specifically  described  in Exhibit A  (collectively,  the
     "Leases");  all carried  interests,  overriding  royalties,  and production
     payments  associated with the Leases;  all oil, gas, and other hydrocarbons
     and associated substances (collectively,  the "Hydrocarbons")  attributable
     to the Leases and the lands covered thereby (the "Lands"); and all contract
     rights and interests associated with the Leases and Lands.

          (b) The oil and gas wells and units associated therewith, specifically
     described  in Exhibit B  (collectively,  the  "Wells"),  together  with all
     disposal wells on the Lands or on lands pooled or unitized  therewith,  and
     all  personal  property,  equipment,   fixtures,   improvements,   permits,
     rights-of-way  and easements  used or held for use in  connection  with the
     production, gathering, treatment, processing, compression, storing, sale or
     disposal  of  Hydrocarbons  or  water  produced  from  the  properties  and
     interests  described  in Section  1.1(a),  except to the  extent  otherwise
     provided in Section 2.3 in respect of the Ross 13-19 well.

          (c)  The   unitization,   pooling  and   communitization   agreements,
     declarations  and orders,  and the units created thereby and all other such
     agreements  relating to the properties and interests  described in Sections
     1.1(a) and (b) and to the production of Hydrocarbons,  if any, attributable
     to said properties and interests.

          (d) All existing and effective sales, purchase,  exchange,  gathering,
     transportation and processing contracts,  operating  agreements,  balancing
     agreements,  farmout agreements,  service agreements,  and other contracts,
     agreements and instruments of every type and nature whatsoever,  insofar as
     they relate to the  properties and interests  described in Sections  1.1(a)
     through (c).

          (e) The files,  records and data  relating to the items  described  in
     Sections  1.1(a)  through (d)  maintained  by Shama Zoe and relating to the
     interests  described  in Sections  1.1(a)  through (d)  (including  without
     limitation,  all lease files,  land files,  well files,  drilling  reports,
     division order files, abstracts, federal and state status reports and title
     opinions, seismic data, geophysical data and other geologic information and
     data (the "Records").

     1.2 Sale of the Property.  At the Closing (as hereinafter  defined),  Shama
Zoe agrees to transfer the Property to Pannonian Energy, Inc.  ("Pannonian"),  a
wholly owned subsidiary of Gasco,  effective as of 7:00 a.m.,  Mountain Time, on
the Closing Date (as hereinafter  defined) (the "Effective Time"). The transfers
will be made,  as to  federal  and state  leases,  on  customary  assignment  of
operating rights forms and, as to fee leases, Wells and other items described in
Section 1.1(b), on forms  substantially  similar to those used by the parties in
their past dealings.  The separate  assignments of contract rights  mentioned in
Section 1.1(a) (including,  without limitation,  the Exploration  Agreements and
all  side  letters,   amendments,   and  other  agreements  [collectively,   the
"Burlington  Exploration  Agreements"] among Shama Zoe, Pannonian and Burlington
Oil & Gas Company,  LP  ["Burlington"])  and the  assignments  of the contracts,
agreements and other items  described in Sections 1.1(c) and 1.1(d) will be made
only (i) to the extent that they relate to the  interests in the Leases that are
being  assigned  to  Pannonian,  after  giving  effect  to  the  exceptions  and
reservations described in Section 1.3, and (ii) as to 100% of all future earning
rights and preferential rights.

     1.3  Exceptions  and  Reservations.   Notwithstanding  the  foregoing,  the
Property  shall not include any of the following  items,  each of which shall be
excepted  from the  transfer  contemplated  by Section 1.2 and reserved to Shama
Zoe, its successors and assigns:

          (a) A divided 75% leasehold interest (proportionately reduced if Shama
     Zoe is  assigning  less than the full  leasehold  interest  or if the lease
     covers  less  than  the  full fee oil and gas  estate)  in the  Fort  Union
     formation  in all of the Leases being  assigned,  so that  Pannonian  shall
     receive 100% of the Fort Union rights in one  160-acre  quarter  section of
     every  section  and  Shama  Zoe  shall  receive  100% of the  rights in the
     remaining   three   quarter-sections   of  every  section,   as  originally
     contemplated by the Farmout Agreement between Pannonian and Shama Zoe dated
     April 1, 2001;

          (b)  An  undivided  10%  leasehold  interest  in  the  Leases  in  all
     formations other than the Fort Union  formation,  which shall be carried as
     to the full 10%  leasehold  interest by Gasco in the wellbores of the first
     ten wells  drilled by Gasco on lands  covered by the  Leases,  as to a 7.5%
     leasehold  interest  in the  wellbores  of the second ten wells  drilled by
     Gasco on lands covered by the Leases, as to a 5% leasehold  interest in the
     wellbores of the third ten wells  drilled by Gasco on lands  covered by the
     Leases,  and as to a 2.5% leasehold  interest in all formations  other than
     the Fort Union  formation  in the  wellbores  of the next twenty  wells (in
     other words,  wells 31 through 50) drilled by Gasco on lands covered by the
     Leases,  in all cases  carried by  Pannonian  through  the tanks or through
     connection  to the gas sales line,  without  any  recoupment  or  recovery,
     either  before  or  after  payout,  by  Pannonian  of the  amount  paid  in
     connection with the carry from production or otherwise;  provided, however,
     that (i) the carries shall not apply to wells  commenced  with an objective
     of being  completed in the Fort Union  formation  and (ii) the reserved 10%
     leasehold interest and all of the carries shall be proportionately  reduced
     if Shama Zoe is  assigning  less than the full  leasehold  interest  in the
     concerned  lease,  if the lease  covers  less than the full fee oil and gas
     estate,  or if Pannonian is assigning any leasehold  interest to Burlington
     pursuant  to  the  requirements  of  any  of  the  Burlington   Exploration
     Agreements.  The reserved carried working interests shall never apply to or
     burden any interests  that are assigned to  Burlington,  its successors and
     assigns, by Pannonian pursuant to the requirements of any of the Burlington
     Exploration Agreements; and

          (c) An overriding  royalty  interest on production  obtained under the
     terms of each Lease equal to the  difference  between 19% and the landowner
     royalties,   overriding  royalties  and  other  burdens  on  production  in
     existence on the Closing Date, subject to proportionate  reduction if Shama
     Zoe is assigning  less than the full  leasehold  interest in the  concerned
     lease, if the lease covers less than the full fee oil and gas estate, or if
     Pannonian  assigns any  leasehold  interest to  Burlington  pursuant to the
     requirements of any of the Burlington Exploration Agreements.  The reserved
     overriding  royalty  interests shall never apply to or burden any interests
     that are assigned to Burlington,  its successors and assigns,  by Pannonian
     pursuant  to  the  requirements  of  any  of  the  Burlington   Exploration
     Agreements.

     1.4  Definition  of Fort Union  Formation.  For  purposes of the  preceding
Section 1.3, the Fort Union Formation shall mean the stratigraphic equivalent of
the  interval  from  2,989 feet to 7,173  feet as  identified  in the Gamma Ray,
Spontaneous  Potential (SP) and the  Resistivity  curves for the Ultra Resources
Cottonwood  Federal #32-33 well located in the SW/4 NE/4 of Section 33, Township
32 North, Range 111 West, Sublette County, Wyoming.

                                   ARTICLE II
                                 PURCHASE PRICE

     2.1 Payment of Purchase Price.

          (a) In  consideration  of the  transfer of the  Property,  Gasco shall
     deliver to Shama Zoe at the Closing a certificate or certificates issued in
     the name of Shama Zoe evidencing  9,500,000  shares (the "Gasco Shares") of
     Gasco's fully paid and  non-assessable  common stock, par value $0.0001 per
     share ("Gasco Stock").

          (b) At the Closing and  following  the  delivery  set forth in Section
     2.1(a),  Shama Zoe shall  deliver to Gasco a  certificate,  accompanied  by
     stock powers duly  endorsed in blank,  evidencing  2,000,000  shares of the
     Gasco Shares delivered pursuant to Section 2.1(a) (the "Holdback  Shares").
     On the date that is 30 days  following the Closing,  Gasco shall deliver to
     Shama Zoe all of the Holdback  Shares,  other than the Retained  Shares (as
     defined  below).  Within 30 days following the Closing,  Gasco shall notify
     Shama Zoe in writing (a "Title  Notice") of any title defect  involving all
     or any portion of the Leases (a "Title  Defect"),  which  notice  shall set
     forth the nature of the  defect.  Following  receipt  of any Title  Notice,
     Shama Zoe shall use its  reasonable  efforts to cure the Title  Defects set
     forth in such  notice  at its sole  expense  within 45 days  following  the
     expiration of the 30-day  period.  If Gasco  notifies  Shama Zoe of a Title
     Defect or Title Defects which, in the aggregate,  relate to an area of Land
     that is in excess of 5% of the total acreage underlying the Leases (in each
     case net to the interest therein  conveyed  pursuant hereto by Shama Zoe to
     Pannonian),  then,  subject to the cure  provisions set forth below,  Gasco
     shall retain a number of Holdback  Shares (the "Retained  Shares") equal to
     the quotient of (i) the number of net acres affected by the Title Defect or
     Title  Defects  multiplied by $100/acre,  divided by (ii)  $1.93/share.  No
     later than the end of the 45-day period  described  above,  Shama Zoe shall
     notify Gasco in writing of its effecting any cure of a Title Defect,  which
     notice shall  describe in reasonable  detail the nature of the cure and the
     Leases thereby  affected.  Gasco shall then have 10 days in which to notify
     Shama Zoe of any disputes it may have as to the effectiveness of such cure,
     or if it has no such disputes, deliver a number of Retained Shares equal to
     the  quotient  of (i) the number of net acres  affected by such cured Title
     Defect  multiplied  by  $100/acre,  divided by (ii)  $1.93/share.  If Gasco
     notifies Shama Zoe of any disputes as to the effectiveness of any cure of a
     Title  Defect,  the  parties  shall  cooperate  with  each  other  and  use
     reasonable  efforts to promptly resolve such dispute.  If any Title Defects
     remain following the conclusion of the foregoing procedures,  Gasco, at its
     option,  may waive the defects  and deliver the related  number of Retained
     Shares to Shama Zoe or reconvey to Shama Zoe its interest in any Leases, or
     portions  thereof,  affected by the Title  Defects that have not been cured
     and for which Retained Shares will be held permanently by Gasco.

     2.2 Registration of Gasco Shares.

          (a) Gasco shall,  as soon as practicable  following the Closing but in
     no event later than May 31, 2002,  file a registration  statement under the
     Securities Act of 1933, as amended (the  "Securities  Act") with respect to
     the resale by Shama Zoe of the Gasco Shares and use  reasonable  efforts to
     cause the  Securities  and  Exchange  Commission  (the  "SEC")  to  declare
     effective the  registration  statement as soon as practicable.  The parties
     hereto  acknowledge that the  registration  statement is not expected to be
     filed with the SEC until the second half of May 2002, and the  registration
     statement  will not be effective  until between 60 and 120 days after it is
     filed.  Subject to Shama  Zoe's  right to sell the Gasco  Shares  under the
     registration statement after it becomes effective,  all of the Gasco Shares
     will be "restricted  securities" as defined in Rule 144  promulgated  under
     the Securities Act and subject to appropriate  legends and  restrictions on
     transfer. In the event the registration statement is not declared effective
     by the SEC by  October  1, 2002,  then  Gasco  shall  issue to Shama Zoe an
     additional  100,000  shares of fully paid,  non-assessable  common stock of
     Gasco and  provide  for  registration  of shares in the same  procedure  as
     described immediately above.

          (b) All expenses  incurred by Gasco in connection with  registrations,
     filings or qualifications pursuant to this Section 2.2, including,  without
     limitation, all registration,  filing and qualification fees, printers' and
     accounting  fees, fees and  disbursements of counsel for Gasco (but not any
     expenses,  fees or  disbursements  incurred by Shama Zoe) shall be borne by
     Gasco.  Any fees or costs  incurred  by Shama  Zoe in  connection  with the
     registration statement shall be borne by Shama Zoe.

          (c)  Except to the extent  information  included  in the  registration
     statement  relates to Shama Zoe and is included in  reliance  upon  written
     information  supplied by Shama Zoe,  Shama Zoe shall not be  responsible or
     liable for the  completeness,  accuracy or sufficiency of the  registration
     statement. Gasco shall indemnify and hold harmless Shama Zoe for any Losses
     (as defined in Section 10.2) arising out of any material misrepresentations
     or untrue statements of material fact in the registration  statement or any
     omission  to  state a  material  fact  required  to be  stated  therein  or
     necessary to make the statements therein not misleading,  other than a Loss
     arising as a result of information  included in the registration  statement
     related to Shama Zoe that is included in reliance upon written  information
     supplied by Shama Zoe.  Shama Zoe shall  indemnify and hold harmless  Gasco
     for any Losses  arising out of any  material  misrepresentations  or untrue
     statement of a material fact in the registration  statement or any omission
     to state a material fact required to be stated therein or necessary to make
     the statements  therein not  misleading  arising as a result of information
     included  in the  registration  statement  related  to  Shama  Zoe  that is
     included in reliance upon written information supplied by Shama Zoe.

          (d) Gasco  shall  furnish  without  charge to Shama Zoe such number of
     copies of the prospectus  included in the  registration  statement and such
     other documents as Shama Zoe may reasonably  request in order to facilitate
     the disposition by Shama Zoe of the Gasco Shares. Gasco shall also promptly
     notify Shama Zoe, after becoming aware thereof,  of the issuance by the SEC
     of  any  stop  order  suspending  the  effectiveness  of  the  registration
     statement  or the  happening  of any event  which  makes  the  registration
     statement or any post-effective  amendment  thereto,  related prospectus or
     any amendment or supplement thereto, or any document  incorporated  therein
     by  reference,  contain any untrue  statement of a material fact or omit to
     state any material fact required to be stated  therein or necessary to make
     the statements  therein in the light of the circumstances  under which they
     were made not  misleading.  Gasco  shall  prepare and file with the SEC all
     such  amendments  and  supplements to the  registration  statement and each
     prospectus  used in  connection  therewith  as may be necessary to keep the
     registration  statement  effective  until the earlier of the disposition of
     all the Gasco Shares by Shama Zoe or two years  following  the Closing Date
     and as may be necessary  to comply with the  provisions  of the  Securities
     Act.

          (e) Shama Zoe agrees to furnish to Gasco and its independent  auditors
     such accounting and financial information concerning the Property as may be
     required for such auditors to prepare audited financial  statements for the
     Property for inclusion in the registration statement. Shama Zoe understands
     and  agrees  that in  order  to  sell  any  Gasco  Shares  pursuant  to the
     registration statement, Shama Zoe or the broker effectuating such sale must
     deliver  a copy of the  current  prospectus  included  in the  registration
     statement to the purchaser of such shares prior to or  simultaneously  with
     the delivery of the confirmation for such sale to such purchaser. Shama Zoe
     understands  that any sale which fails to comply with the  requirements  of
     the preceding  sentence will not be in compliance  with the  Securities Act
     and must be  rescinded.  Shama Zoe  understands  that,  upon receipt of any
     notice from Gasco of the  happening  of any event  described  in the second
     sentence of Section 2.2(d) hereof,  Shama Zoe must immediately  discontinue
     disposition  of its Gasco  Shares  pursuant to the  registration  statement
     until the lifting of such stop order or Shama  Zoe's  receipt of the copies
     of the supplemental or amended prospectus, as applicable.

     2.3 Additional Consideration.  Pannonian has previously assigned its entire
interests in the Ross #13-19 wellbore,  together with its leasehold interests in
a mutually  acceptable  spacing unit for that well,  to Shama Zoe, and Shama Zoe
has assumed  all  obligations  relating  to the lease,  insofar as it covers the
agreed  spacing  unit,  and all  obligations  relating  to the  land,  including
plugging  liability and well site reclamation,  associated with the Ross #13-19.
Shama Zoe will retain such  interest  and the  assumed  obligations  in the Ross
#13-19 wellbore and the agreed spacing unit,  neither of which shall be conveyed
to Pannonian under the terms of this Agreement. In addition, until (i) Shama Zoe
has sold all of the Gasco Shares or (ii) Shama Zoe has realized  $12,000,000  in
gross  proceeds or other gross value from the sale or other  disposition  of the
Gasco Shares or (iii) two years  following  the Closing  Date,  whichever  shall
first occur, Gasco shall cause Pannonian to assign to Shama Zoe an undivided 10%
leasehold  interest  (subject to proportionate  reduction if Pannonian  acquires
less than the full  leasehold  interest  estate or if Pannonian is assigning any
leasehold  interest  to  Burlington  pursuant  to the  provisions  of any of the
Burlington Exploration  Agreements) in any new oil and gas leases that Pannonian
may acquire in Sublette County after the Closing Date.

     2.4 No  Adjustments  to  Purchase  Price.  Except as set forth in  Sections
2.1(b) and 2.3,  there will be no  adjustments  to the  Purchase  Price for cost
apportionment, ad valorem or other tax apportionment, title failure, fluctuation
of Gasco common stock market price, production sales, or any other reason.

     2.5  Anti-Dilution.  If prior to the Closing  Date,  Gasco  should split or
combine the  outstanding  shares of Gasco common  stock,  recapitalize  or pay a
dividend or other distribution payable in shares of Gasco common stock, then the
number of Gasco  Shares to be issued  pursuant  to Section  2.1 hereof  shall be
appropriately  adjusted to reflect  such split,  recapitalization,  combination,
dividend or  distribution.  Until (i) Shama Zoe has sold all of the Gasco Shares
or (ii) Shama Zoe has  realized  $12,000,000  in gross  proceeds  or other gross
value from the sale or other  disposition of the Gasco Shares or (iii) two years
following the Closing Date,  whichever shall first occur,  Gasco shall not issue
any  shares of Gasco  common  stock for cash  consideration  less than $1.80 per
share other than  pursuant to the exercise of stock options  outstanding  on the
date hereof,  without the prior written  consent of the general partner of Shama
Zoe.

     2.6  Lock-Up.  Until (i) Shama Zoe has sold all of the Gasco Shares or (ii)
Shama Zoe has realized  $12,000,000  in gross proceeds or other gross value from
the sale or other  disposition of the Gasco Shares or (iii) two years  following
the Closing Date,  whichever shall first occur,  Gasco will not issue any shares
of Gasco common stock that are  registered  under the Securities Act or that are
subject to registration  rights that may be exercised  within the foregoing time
limitations  and Gasco shall not permit  either Marc Bruner or Mark  Erickson to
sell more than  200,000 of his shares of Gasco  common  stock  without the prior
written approval of the general partner of Shama Zoe.

                                   ARTICLE III
                               GASCO'S INSPECTION

     3.1 Access to Records. Immediately after execution of this Agreement, Shama
Zoe will  make  the  Records  available  to Gasco  and its  representatives  for
inspection and review at the offices of Shama Zoe during normal  business hours,
and during non-business hours if reasonably  requested by Gasco, to permit Gasco
to perform its due diligence  review.  Subject to the consent and cooperation of
third  parties,  Shama Zoe will assist  Gasco in Gasco's  efforts to obtain,  at
Gasco's  expense,  such additional  information  from third parties as Gasco may
reasonably request,  for the purposes of Gasco's due diligence review. Gasco may
inspect  the  Records and such  additional  information  only to the extent such
inspection does not violate any  contractual  commitment of Shama Zoe to a third
party.  Shama Zoe shall use  commercially  reasonable  efforts to obtain consent
from any such third  party to  disclose  the  information  and Records to Gasco,
provided  that Gasco  agrees to keep same  confidential  and not  disclose it to
anyone other than its advisors in this  transaction,  and provided  further that
Shama Zoe shall have no obligation to make any payment to obtain such consent.

     3.2 Access to the Property.  Immediately after execution of this Agreement,
Shama  Zoe  agrees  to grant  Gasco  access to the  Property  during  reasonable
business hours, and during non-business hours if reasonably  requested by Gasco,
so Gasco may conduct,  at its sole risk and  expense,  on-site  inspections  and
environmental  assessments of the Property.  If Gasco or its agents  prepares an
environmental  assessment  of any Asset,  Gasco  agrees to keep such  assessment
confidential  and to furnish copies thereof to Shama Zoe. In connection with any
on-site inspections, Gasco (i) agrees not to interfere with the normal operation
of the Property, (ii) agrees to comply with all requirements of the operators of
the Property and (iii)  represents  that it is adequately  insured in accordance
with industry  practice of prudent  operators of oil and gas  properties.  Gasco
waives,  releases  and  agrees to  indemnify  Shama  Zoe,  and their  respective
directors,    officers,    shareholders,    members,   employees,   agents   and
representatives  against all  liabilities  and  obligations,  including  without
limitation,  personal injury, death and/or property damage, arising from Gasco's
activities  on the Property  except to the extent such  liability or damages are
caused by Shama Zoe's negligence or willful misconduct.

                                   ARTICLE IV
                   SHAMA ZOE'S REPRESENTATIONS AND WARRANTIES

     4.1  Limited  Partnership  Representations.  Shama Zoe makes the  following
representations and warranties:

          (a)   Formation/Qualification.   Shama  Zoe  is  a  Colorado   limited
     partnership,  duly organized,  validly  existing and in good standing under
     the laws of the State of Colorado and is  qualified to conduct  business in
     Wyoming.

          (b)  Power  and  Authority.  Shama  Zoe has all  requisite  power  and
     authority  to  own  its  interest  in the  Property  and  to  carry  on its
     businesses as presently conducted and to execute and deliver this Agreement
     and to perform its obligations under this Agreement.

          (c) No  Lien,  No  Violation.  The  execution  and  delivery  of  this
     Agreement does not, and the  fulfillment  of and compliance  with the terms
     and  conditions  hereof  will  not,  as of  Closing,  (i)  create a lien or
     encumbrance on the Property or trigger an outstanding  security interest in
     the Property that will remain in existence after Closing,  (ii) violate, or
     be in  conflict  with,  any  material  provision  of any  statute,  rule or
     regulation  applicable to Shama Zoe or any agreement or instrument to which
     Shama Zoe is a party or by which it is bound,  or, (iii) to its  knowledge,
     violate, or be in conflict with any judgment, decree or order applicable to
     it.

          (d)  Authorization  and  Enforceability.  This  Agreement  is duly and
     validly  authorized and constitutes the legal, valid and binding obligation
     of Shama Zoe, enforceable in accordance with its terms,  subject,  however,
     to the effects of bankruptcy,  insolvency,  reorganization,  moratorium and
     other  laws  for  the  protection  of  creditors,  as  well  as to  general
     principles of equity,  regardless whether such enforceability is considered
     in a proceeding in equity or at law.

          (e) No Bankruptcy.  There are no bankruptcy proceedings pending, being
     contemplated by or, to Shama Zoe's knowledge, threatened against Shama Zoe.

          (f) No Broker's Fees. Shama Zoe has not engaged any broker,  finder or
     investment  banker  for  which  Gasco  could  be  liable  for  any  fees or
     commissions in connection with the transactions contemplated hereby.

          (g)  Litigation.  Shama  Zoe has not  received  any  written  claim or
     written  demand  notice that has not been  resolved  that would  materially
     adversely  affect  the  Property.  There  are no  actions,  suits,  ongoing
     governmental investigations,  written governmental inquiries or proceedings
     pending or, to its  knowledge,  threatened in writing  against it or any of
     the Property, in any court or by or before any federal, state, municipal or
     other  governmental  agency  that  would  affect  Shama  Zoe's  ability  to
     consummate the transaction  contemplated  hereby,  or materially  adversely
     affect the Property or Shama Zoe's ownership or operation of the Property.

     4.2  Shama  Zoe's  Representations  and  Warranties  with  Respect  to  the
Property. Shama Zoe makes the following representations and warranties regarding
the Property:

          (a) No  Liens.  Except  for  the  matters  disclosed  on the  exhibits
     attached hereto,  the Property will be conveyed to Pannonian at the Closing
     free and clear of all liens and encumbrances.

          (b)  Judgments.  There are no  unsatisfied  judgments  or  injunctions
     issued by a court of competent  jurisdiction or other  governmental  agency
     outstanding  against  Shama  Zoe  that  would  be  reasonably  expected  to
     materially  interfere  with the  operation  of the Property or impair their
     ability to consummate the transaction contemplated hereby.

          (c)  Compliance  with Law.  With  respect to the  Property,  as of the
     Closing,  Shama  Zoe has not  received  written  notice  (i) of a  material
     violation of any statute, law, ordinance, regulation, permit, rule or order
     of any  federal,  state  or  local  government  or any  other  governmental
     department  or  agency,  or any  judgment,  decree  or order of any  court,
     applicable to their business or operations which remains uncured, and which
     would have a material  adverse  effect on any of the  Property or (ii) from
     any  government  authority  with  jurisdiction  over the Property  that any
     portion of the Property is not in substantial  compliance  with  applicable
     laws.

          (d) Calls on Production.  There are no calls on or preferential rights
     to purchase production from the Property.

          (e) Purchase Rights and Consents.  There are no preferential  purchase
     rights  burdening  the Property nor is there the need to obtain any consent
     or  permission  from any third  party in respect of Shama  Zoe's entry into
     this Agreement or the consummation of any transaction  contemplated by this
     Agreement.

          (f) Books and Records.  Shama Zoe maintains  records that  accurately,
     validly and fairly  reflect  all of its  transactions  with  respect to the
     Property  in a manner to permit  preparation  of  financial  statements  in
     accordance  with  generally  accepted  accounting  principles and any other
     criteria  applicable to such statements and to maintain  accountability for
     assets.

                                    ARTICLE V
                     GASCO'S REPRESENTATIONS AND WARRANTIES


         Gasco makes the following representations and warranties on behalf of
itself and all of its Subsidiaries (as defined in Section 5.1 below). All
references to Gasco in this Article V shall be deemed to include Gasco and all
of its Subsidiaries except as otherwise may be specifically indicated.


     5.1 Organization and Qualification.  Each of Gasco, Pannonian,  and Gasco's
other direct or indirect  subsidiaries  (Pannonian and such other  subsidiaries,
the  "Subsidiaries")  is a  corporation  or a  limited  liability  company  duly
organized,  validly  existing  and  in  good  standing  under  the  laws  of the
jurisdiction  of its  organization,  and has the requisite  corporate  power and
authority to own or lease all material property that it purports to own or lease
and to carry on its business as now being conducted.  Each of the  Subsidiaries,
along with the nature and amount of Gasco's ownership  therein,  is set forth on
Exhibit C hereto.  Each of Gasco and the  Subsidiaries  is duly  qualified  as a
foreign  corporation or limited liability company,  and is in good standing,  in
each  jurisdiction  where the  character of its  properties  owned or held under
lease or the nature of its activities makes such qualification necessary, except
to the extent that the failure to so qualify  would not have a material  adverse
effect  on  the  business  or  financial  condition  of  any  of  Gasco  or  the
Subsidiaries.

     5.2 Articles of Incorporation and Bylaws. Gasco has heretofore furnished to
Shama  Zoe or its  counsel  a  complete  and  correct  copy of its  Articles  of
Incorporation, as amended, and the Bylaws, as amended, of Gasco, as presently in
effect.

     5.3  Capitalization.  As of April 23, 2002, the authorized capital stock of
Gasco consists of  100,000,000  shares of $.0001 par value Common Stock of which
32,012,500  shares are issued and 31,938,800  shares are outstanding;  5,000,000
shares  of  Preferred  Stock,  of which  500  shares  of  Series  A  Convertible
Redeemable  Preferred  Stock,  $.001  par  value,  are  outstanding.  There  are
4,750,000  shares of Common Stock  reserved for issuance upon  conversion of the
outstanding Preferred Stock. There are 6,642,750 shares of Common Stock reserved
for issuance  upon exercise of stock  options  granted by Gasco and  outstanding
warrants  of  Gasco.  Except  for  this  Agreement  and the  foregoing  options,
warrants, and Preferred Stock there are no options, warrants, Preferred Stock or
other rights,  agreements or commitments  that do or may obligate Gasco to issue
any shares of its capital  stock.  The Gasco Shares,  upon issuance on the terms
and conditions specified herein, will be duly authorized,  validly issued, fully
paid and  nonassessable,  and free of  preemptive  rights.  Upon delivery of the
Gasco Shares,  in  consideration  of the purchase price,  Shama Zoe will acquire
valid  and  marketable  title  to  the  Gasco  Shares  free  and  clear  of  any
encumbrances  and  restrictions  except as set forth in Sections  2.1 and 2.2 of
this Agreement.

     5.4 Capacity,  Authorization and Enforceability of Agreement. Gasco has the
requisite  corporate  power and authority to enter into this  Agreement,  and to
perform its obligations  hereunder and thereunder.  This Agreement has been duly
authorized,  executed and delivered by Gasco and constitutes a legal,  valid and
binding obligation of Gasco enforceable against the Gasco in accordance with its
terms   subject,   however,   to  the   effects   of   bankruptcy,   insolvency,
reorganization,  moratorium and similar laws for the protection of creditors, as
well as to general principles of equity,  regardless whether such enforceability
is considered in a proceeding in equity or at law.

     5.5 No Conflict;  Required Filings and Consents. The execution and delivery
of this Agreement and the  consummation of the  transactions  herein and therein
contemplated will not conflict with or violate any law or regulation, or, to its
knowledge,  any court order,  judgment or decree applicable to Gasco or by which
its property is bound or affected,  or conflict  with or result in any breach of
or constitute a default (or any event which  without  notice or lapse of time or
both would become a default)  under, or give to others any rights of termination
or cancellation  of, or result in the creation of any lien or encumbrance on any
of the  properties  or  assets  of  Gasco  pursuant  to:  (a)  the  Articles  of
Incorporation  or  Bylaws  of Gasco or (b) any  material  contract,  instrument,
permit,  license or franchise to which Gasco is a party or by which Gasco or its
property is bound or affected.  Except for applicable  requirements,  if any, of
the Securities  Act, the Securities  Exchange Act of 1934 (the "Exchange  Act"),
the Employee  Retirement  Income Security Act of 1974 and state  securities laws
("Blue Sky Laws"),  (i) Gasco is not  required  to submit any notice,  report or
other filing with any governmental or regulatory authority, domestic or foreign,
in  connection  with  the  execution  or  delivery  of  this  Agreement,  or the
consummation of the  transactions  contemplated  by this Agreement,  and (ii) no
waiver,  consent,  approval or  authorization  of any governmental or regulatory
authority,  domestic or foreign,  is required to be obtained or made by Gasco in
connection with its execution or delivery of this Agreement or the  consummation
of the transactions intended hereby.

     5.6  Financial  Statements;   Securities  Reports.   Gasco  has  previously
furnished  or will  furnish  to Shama  Zoe  prior to the  Closing  with true and
complete  copies of its  Annual  Report on Form 10-K for the  fiscal  year ended
December  31,  2001 and any  amendment  thereto,  all  Form  8-K's  filed  after
September 30, 2001, its Form 10-Q for the quarter ended March 31, 2002,  and, if
available prior to Closing,  its definitive  proxy statement for the 2002 Annual
Meeting  of  Shareholders,  in each  case as  filed  with  or  furnished  to the
Securities  and  Exchange  Commission  (the  "SEC")   (collectively,   the  "SEC
Reports").  The foregoing  filings with the SEC, along with all other reports or
other filings  required  under the Exchange Act, the Securities Act of 1933, any
other applicable federal securities laws, the rules and regulations  promulgated
thereunder, and Blue Sky Laws shall be referred to collectively hereafter as the
"Securities  Reports." The Exchange Act, the  Securities  Act of 1933, any other
applicable  federal  securities  laws,  the  rules and  regulations  promulgated
thereunder, and Blue Sky Laws shall be referred to as the "Securities Laws." The
financial  statements  and  schedules  contained in the  Securities  Reports (or
incorporated  therein  by  reference)  were  prepared  or  will be  prepared  in
accordance with generally accepted accounting principles applied on a consistent
basis throughout the periods involved (except as specifically disclosed therein)
and fairly present the information  purported to be included therein.  Gasco has
filed all Securities  Reports as required under the Securities Laws. Each of the
Securities  Reports was filed with or  furnished  to the SEC and any  applicable
state  securities  regulatory  agencies  on a timely  basis and,  on the date of
filing thereof,  complied in all material  respects with the requirements of the
Securities  Laws, and did not contain any untrue statement of a material fact or
omit to state a material fact required to be stated therein or necessary to make
the  statements  therein,  in light of the  circumstances  under which they were
made, not misleading.

     5.7 Property,  Leases and Licenses.  Gasco has good and defensible title to
all of the properties and assets that the Securities  Reports indicate are owned
by it,  free and  clear of all  liens,  security  interests,  pledges,  charges,
encumbrances,  and  mortgages  except  as  may  be  properly  described  in  the
Securities  Reports or such as in the  aggregate do not now have and will not in
the  future  have a  material  adverse  effect  upon the  operations,  business,
properties,  or assets of Gasco;  provided,  however,  that no representation or
warranty  whatsoever  is made with  respect  to any  non-producing  oil,  gas or
mineral leases or interests.

     5.8 Material  Contracts,  Leases and  Licenses.  Any  contract,  agreement,
instrument,  lease,  or license  required to be  described  in the  Registration
Statement or the Securities  Reports has been properly  described  therein.  Any
contract,  agreement,  instrument,  lease, or license required to be filed as an
exhibit to the Registration  Statement has been filed with the SEC as an exhibit
to a Securities  Report.  Such contracts,  agreements,  instruments,  leases and
licenses  shall be referred to as the "Required  Agreements."  Except insofar as
any Required  Agreement  has been  terminated by its terms or otherwise has been
terminated  or amended in any material  respects as set forth in any  Securities
Reports,  each such  Required  Agreement is in full force and is the valid,  and
binding  obligation  of the  parties  thereto and is  enforceable  as to them in
accordance  with its terms.  Gasco enjoys  peaceful and  undisturbed  possession
under all leases and licenses under which it is operating.  Gasco is not a party
to or bound by any  Required  Agreement,  or  subject  to any  charter  or other
restriction,  which has had or may in the future have a material  adverse effect
on the financial condition, results of operations, business, properties, assets,
liabilities, or future prospects of Gasco.

     5.9 Intellectual and Intangible Property. All patents, patent applications,
trademarks,  trademark  applications,  trade names,  service marks,  copyrights,
franchises, technology, know-how and other intangible properties and assets (all
of the  foregoing  being  herein  called  "Intangibles")  that Gasco owns or has
pending,  or under which it is licensed,  are in good standing and  uncontested.
Except as otherwise  disclosed in the Securities  Reports,  the  Intangibles are
owned by Gasco, free and clear of all liens,  security interests,  pledges,  and
encumbrances.  All registered  trademarks used by Gasco to identify its services
are protected by registration in the name of Gasco on the principal  register of
the  United  States  Patent  Office.  There is no  right  under  any  Intangible
necessary to the business of Gasco as presently  conducted or as the  Securities
Reports indicate it contemplates  conducting  (except as may be so designated in
the Securities Reports). Gasco has not infringed, is not infringing, and has not
received notice of infringement with respect to asserted  Intangibles of others.
To the knowledge of Gasco,  there is no infringement by others of Intangibles of
Gasco. To the knowledge of Gasco, there is no Intangible of others which has had
or  may  in the  future  have  a  materially  adverse  effect  on the  financial
condition, results of operations,  business, properties, assets, liabilities, or
future prospects of Gasco.

     5.10 Compliance  with Law. Gasco is in compliance in all material  respects
with all laws and  regulations  applicable to its  operations or with respect to
which compliance is a condition of engaging in the business  thereof,  except to
the extent that  failure to comply would not have a material  adverse  effect on
the business or  financial  condition  of Gasco.  With respect to  Environmental
Laws, compliance therewith is deemed to include, without limitation, that:

          (a)  Gasco  has   acquired   all   material   permits,   licenses  and
     authorization required under any Environmental Laws in order to conduct its
     business as it has been  historically  conducted and Gasco is in compliance
     with all such permits, licenses and authorizations;

          (b)  There  has been no  material  Release  by Gasco  or,  to the best
     knowledge  of  Gasco's  executive  officers,  by any other  person,  of any
     Hazardous Substances,  Oils, Pollutants or Contaminants or any other wastes
     produced by, or resulting  from,  any business,  commercial,  or industrial
     activities  operations,  or  processes,  on,  beneath,  or  adjacent to any
     property currently owned,  occupied or held by Gasco for which Gasco may be
     held liable under any Environmental Laws; and

          (c) to Gasco's knowledge,  there exists no written or tangible report,
     synopsis or summary of any asbestos,  toxic waste or Hazardous  Substances,
     Oils, Pollutants or Contaminants  investigation made with respect to all or
     any portion of the assets of Gasco  (whether or not prepared by experts and
     whether or not in the possession of the executive officers of Gasco).

         The following definitions apply to the foregoing provisions regarding
Environmental Laws:

          (1)  Environmental  Laws  means all  federal,  state  and local  laws,
     regulations,  rules and  ordinances  relating to pollution or protection of
     the environment,  including,  without limitation, laws relating to Releases
     or  threatened  Releases  of  Hazardous  Substances,  Oils,  Pollutants  or
     Contaminants  into the indoor or outdoor  environment  (including,  without
     limitation,  ambient air,  surface water,  groundwater,  land,  surface and
     subsurface  strata) or otherwise  relating to the manufacture,  processing,
     distribution,  use, treatment,  storage, Release,  transport or handling of
     Hazardous Substances, Oils, Pollutants or Contaminants.

          (2) Hazardous  Substances,  Oils, Pollutants or Contaminants means all
     substances  defined as such in the  National Oil and  Hazardous  Substances
     Pollutant  Contingency Plan, 40 C.F.R.  ss.300.6,  or defined as such under
     any Environmental Laws.

          (3) Release means any release,  spill, emission,  discharge,  leaking,
     pumping, injection,  deposit, disposal,  discharge,  dispersal, leaching or
     migration  into the indoor or  outdoor  environmental  (including,  without
     limitation,  ambient  air,  surface  water,  groundwater,  and  surface  or
     subsurface  strata) or into or out of any property,  including the movement
     of Hazardous Substances, Oils, Pollutants or Contaminants through or in the
     air, soil, surface water, groundwater or any property.

     5.11 Absence of Certain  Changes.  Except as  disclosed  in the  Securities
Reports or as contemplated by this Agreement, since December 31, 2002, there has
not been:


          (a) any material  adverse  change in the business,  assets,  condition
     (financial or otherwise), operations or prospects of Gasco;

          (b) any damage,  destruction or loss,  whether covered by insurance or
     not,  having  a  material  adverse  effect  on the  business  or  financial
     condition of Gasco;

          (c) any  issuance  of capital  stock or of rights to  acquire  capital
     stock or  securities  convertible  into capital  stock,  or any  agreements
     relating to such issuance, other than the issuance of Common Stock upon the
     exercise of stock  options under the option plans of Gasco and the issuance
     of 4,750,000  shares of Common Stock upon the  conversion  of 500 shares of
     Series A Convertible Redeemable Preferred Stock;

          (d) any redemption, repurchase or other acquisition of Common Stock of
     Gasco or any  declaration or payment of any dividend or other  distribution
     in cash,  stock or property with respect to Common Stock,  or any amendment
     to the  Articles of  Incorporation  or Bylaws or  comparable  documents  of
     Gasco, other than an amendment to the Bylaws dated April 18, 2002;

          (e) any labor dispute,  other than routine individual  grievances that
     are not,  singly or in the  aggregate,  material to the  business,  assets,
     condition (financial or otherwise), operations or prospects of Gasco;

          (f)  any  entering  into of any  material  commitment  or  transaction
     including,  without limitation,  any borrowing,  repayment of indebtedness,
     capital  expenditure  or business  combination,  other than in the ordinary
     course of business consistent with past practice or as contemplated by this
     Agreement;

          (g) any  transfer  of or rights  granted  under any  material  leases,
     licenses, agreements,  patents, trademarks, trade names or copyrights other
     than those transferred or granted in the ordinary course of business;

          (h) any change by Gasco in  accounting  principles  or methods  except
     insofar  as may have  been  required  by a  change  in  generally  accepted
     accounting principles;

          (i)  any  entering  into of any  contract,  agreement,  commitment  or
     arrangement with respect to any of the foregoing; or

          (j) any pending or, to the knowledge of Gasco,  threatened  litigation
     or investigation against Gasco which individually or in the aggregate might
     result in any material  adverse change in the business,  assets,  condition
     (financial or otherwise), operations or prospects of Gasco.

     5.12  Litigation.   There  is  no  action,  suit,   proceeding,   claim  or
investigation by any person, entity,  administrative agency or governmental body
pending or, to Gasco's knowledge,  threatened against it before any governmental
authority  that impedes or is likely to impede its ability (i) to consummate the
transactions contemplated by this Agreement or (ii) to assume the liabilities to
be assumed by it under this Agreement.

     5.13  Offering.  Subject to the  accuracy  of Shama  Zoe's  representations
herein,  the offer,  sale and issuance of the Gasco Shares to be issued to Shama
Zoe in  conformity  with the  terms of this  Agreement  constitute  transactions
exempt from the registration requirements of Section 5 of the Act.

     5.14 Conduct of Business by Gasco Pending the Closing. Prior to the Closing
Date,  unless  Shama  Zoe  shall  otherwise  agree in  writing  or as  otherwise
contemplated by this Agreement.

          (i) Gasco  agrees to conduct its  business  only in the  ordinary  and
     usual   course,   and  to  use  its  best   efforts  to  ensure   that  the
     representations of Gasco contained  hereinabove shall at all times continue
     to be true.

          (ii) Gasco shall use its best efforts to preserve  intact the business
     organization  of Gasco,  to keep  available  the  services  of its  current
     officers  and key  employees,  and to preserve the goodwill of those having
     business relationship with Gasco.

     5.15  Gasco's   Evaluation.   In  entering  into  this   Agreement,   Gasco
acknowledges and affirms that it has relied and will rely solely on the terms of
this Agreement and upon its independent  analysis,  evaluation and investigation
of, and judgment with respect to, the business,  economic,  legal,  tax or other
consequences of this transaction, including without limitation, its own estimate
and  appraisal of the extent and value of the  Property,  and the  petroleum and
natural gas associated with the Property.

     5.16 No  Bankruptcy.  There are no bankruptcy  proceedings  pending,  being
contemplated by or, to Gasco's knowledge, threatened against Gasco.

     5.17 No  Broker's  Fees.  Gasco  has not  engaged  any  broker,  finder  or
investment  banker  for  which  Shama  Zoe  could  be  liable  for  any  fees or
commissions in connection with the transactions contemplated hereby.

     5.18  Fairness  Opinion.  Gasco has  received  a  fairness  opinion  from a
qualified independent third party that the purchase of the Property is fair from
a financial view, to the shareholders of Gasco.

                                   ARTICLE VI
                         CONDITIONS PRECEDENT TO CLOSING

     6.1 Shama Zoe's Conditions  Precedent.  The obligations of Shama Zoe at the
Closing are subject,  at the option of Shama Zoe, to the  satisfaction or waiver
at or prior to the Closing of the following conditions precedent:

          (a) All  representations  and  warranties  of Gasco  contained in this
     Agreement are true in all material respects (considering the transaction as
     a whole) at and as of the Closing in accordance with their terms as if such
     representations and warranties were remade at and as of the Closing;

          (b) No order  has been  entered  by any court or  governmental  agency
     having  jurisdiction  over  the  parties  or the  subject  matter  of  this
     Agreement that restrains or prohibits the purchase and sale contemplated by
     this Agreement and that remains in effect at the time of Closing;

          (c)  Gasco  shall  have   delivered  to  Shama  Zoe  a  draft  of  the
     registration statement referred to in Section 2.2(a) that is in a form that
     is substantially ready to be filed with the SEC.

          (d) Shama Zoe shall have obtained a due diligence memo  concerning any
     material adverse change in the business,  assets,  condition  (financial or
     otherwise), operations or prospects of Gasco.

     6.2 Gasco's Conditions  Precedent.  The obligations of Gasco at the Closing
are subject,  at the option of Gasco, to the  satisfaction or waiver at or prior
to the Closing of the following conditions precedent:

          (a) All  representations and warranties of Shama Zoe contained in this
     Agreement are true in all material  respects  (considering the transactions
     as a whole) at and as of the Closing in  accordance  with their terms as if
     such representations were remade at and as of the Closing;

          (b) No order  has been  entered  by any court or  governmental  agency
     having  jurisdiction  over  the  parties  or the  subject  matter  of  this
     Agreement that restrains or prohibits the purchase and sale contemplated by
     this Agreement and that remains in effect at the time of Closing;

          (c) The Gasco Board of Directors  shall have  approved the purchase of
     the Property pursuant to the provisions of this Agreement; and

          (d) From the date of this  Agreement  until  Closing,  there shall not
     have been any material change in the Property, taken as a whole.

                                   ARTICLE VII
                   RIGHT OF TERMINATION; LIMITATION OF DAMAGES

     7.1  Termination.  This Agreement may be terminated in accordance  with the
following provisions:

          (a) by Shama Zoe if Shama  Zoe's  conditions  set forth in Section 6.1
     are not satisfied through no fault of Shama Zoe, or are not waived by Shama
     Zoe, at or before the Closing Date;

          (b) by Gasco if Gasco's  conditions  set forth in Section  6.2 are not
     satisfied  through  no fault of Gasco,  or are not  waived by Gasco,  at or
     before the Closing;

          (c) by Shama Zoe if,  through no fault of Shama Zoe,  the Closing does
     not occur on or before the Closing Date;

          (d) by Gasco if, through no fault of Gasco, the Closing does not occur
     on or before the Closing Date;

          (e) by mutual agreement of the parties.

     7.2 Limitation on Damages.  Gasco and Shama Zoe expressly waive any and all
rights to consequential, special, incidental, punitive, or exemplary damages and
loss  of  profits  resulting  from a  breach  or  wrongful  termination  of this
Agreement.

                                  ARTICLE VIII
                                     CLOSING

     8.1 Date of Closing.  The Closing of the transactions  contemplated  hereby
(the  "Closing")  shall be held on or before  Thursday,  May 23, 2002 or at such
other time as Gasco and Shama Zoe may mutually agree (the "Closing Date").

     8.2 Place of Closing. The Closing shall be held at the offices of Shama Zoe
in Denver,  Colorado  or at such other time and place as Gasco and Shama Zoe may
mutually agree in writing.

                                   ARTICLE IX
                            POST-CLOSING OBLIGATIONS

     9.1  Records.  Shama Zoe agrees to make the Records  relating to the Leases
and Lands available for pick up by Gasco as soon as is reasonably practical, but
in any event on or before 5 days after  Closing.  Shama Zoe may retain copies of
the Records and Shama Zoe may review and copy the Records upon reasonable notice
for so long as Gasco retains the Records.  Gasco agrees that the Records will be
maintained in compliance with all applicable laws governing document  retention.
The other records (principally seismic data, geophysical data and other geologic
information  and  data)  shall  remain in the  custody  of Shama  Zoe,  although
Pannonian may review and obtain copies of these Records upon reasonable notice.

     9.2  Further  Assurances.  From time to time after  Closing,  Shama Zoe and
Gasco shall each  execute,  acknowledge  and  deliver to the other such  further
instruments  and take such other action as may be reasonably  requested in order
to accomplish more effectively the purposes of the transactions  contemplated by
this Agreement.

                                    ARTICLE X
                  ASSUMPTION OF OBLIGATIONS AND INDEMNIFICATION

     10.1 Pannonian's  Assumption of Liabilities and Obligations.  Upon Closing,
Gasco shall cause  Pannonian to assume and pay,  perform,  fulfill and discharge
all claims,  costs,  expenses,  liabilities  and  obligations  attributed to the
Property  and the period of time after the  Effective  Time  (collectively,  the
"Assumed  Liabilities").  Shama Zoe shall be responsible only for claims, costs,
expenses,  liabilities and obligations  accruing or relating to the Property and
period  of  time  prior  to the  Effective  Time  (collectively,  the  "Retained
Liabilities").

     10.2  Indemnification.  "Losses"  shall  mean  any  actual  losses,  costs,
expenses  (including  court costs,  reasonable  fees and expenses of  attorneys,
technical  experts  and  expert  witnesses  and  the  cost  of   investigation),
liabilities,  damages,  demands,  suits, claims, and sanctions of every kind and
character  (including  civil  fines)  arising  from,  related  to or  reasonably
incident  to  matters  indemnified  against;   excluding  however  any  special,
consequential,  punitive or  exemplary  damages,  loss of profits  incurred by a
party hereto or Loss incurred as a result of the indemnified party  indemnifying
a third  party.  For  purposes  of this  Article X, Gasco shall mean and include
Pannonian.

     After the Closing, the parties agree to indemnify each other as follows:

          (a) Shama Zoe's  Indemnification of Gasco. Shama Zoe assumes all risk,
     liability,  obligation  and Losses in  connection  with,  and shall defend,
     indemnify, and save and hold harmless Gasco, its partners and all officers,
     directors, employees and agents of Gasco and its partners, from and against
     all  Losses  which  arise  from or in  connection  with  (i)  the  Retained
     Liabilities,  (ii) any matter for which  Shama Zoe has agreed to  indemnify
     Gasco under this  Agreement,  and (iii) any breach of the  representations,
     warranties, covenants or agreements by Shama Zoe under this Agreement.

          (b)  Gasco's  Indemnification  of Shama Zoe.  Gasco  assumes all risk,
     liability,  obligation  and Losses in  connection  with,  and shall defend,
     indemnify,  and save and hold harmless Shama Zoe, its respective  officers,
     directors, members, employees and agents, from and against all Losses which
     arise from or in  connection  with (i) the  Assumed  Liabilities,  (ii) any
     matter  for  which  Gasco  has  agreed to  indemnify  Shama Zoe under  this
     Agreement, and (iii) any breach of representations,  warranties, covenants,
     or agreements by Gasco under this Agreement.

          (c) Release.  Gasco shall be deemed to have released  Shama Zoe at the
     Closing from any Losses for which Gasco has agreed to  indemnify  Shama Zoe
     hereunder,  and Shama Zoe  shall be  deemed to have  released  Gasco at the
     Closing from any Losses for which Shama Zoe has agreed to  indemnify  Gasco
     hereunder.

     10.3 Limitation on Shama Zoe's Indemnity Obligations.  If the Loss directly
caused by the breach of the  representation or warranty does not exceed a $5,000
threshold  or if the Loss  directly  caused by the breach is not an actual  Loss
already  incurred by Gasco,  then the parties  deem that the  representation  or
warranty has not been breached on account of such Loss.

     10.4  Procedure.  The  indemnifications  contained in Section 10.2 shall be
implemented as follows:

          (a) Coverage.  Such indemnity  shall extend to all Losses  suffered or
     incurred by the indemnified party.

          (b) Claim Notice. The party seeking indemnification under the terms of
     this Agreement  ("Indemnified Party") shall submit a written "Claim Notice"
     to the other party  ("Indemnifying  Party")  which,  to be effective,  must
     state: (i) the amount of each payment claimed by an Indemnified Party to be
     owing,  (ii) the basis for such claim, with supporting  documentation,  and
     (iii) a list  identifying to the extent  reasonably  possible each separate
     item of Loss for which payment is so claimed.  The amount  claimed shall be
     paid by the Indemnifying Party to the extent required herein within 30 days
     after receipt of the Claim Notice,  or after the amount of such payment has
     been finally established, whichever last occurs.

          (c) Information.  Within 60 days after the Indemnified  Party receives
     notice  of a claim or legal  action  that may  result  in a Loss for  which
     indemnification  may be sought  under  this  Article  10 (a  "Claim"),  the
     Indemnified   Party  shall  give  written  notice  of  such  Claim  to  the
     Indemnifying  Party. If the Indemnifying  Party or its counsel so requests,
     the Indemnified  Party shall furnish the Indemnifying  Party with copies of
     all  pleadings  and other  information  with respect to such Claim.  At the
     election of the  Indemnifying  Party made  within 60 days after  receipt of
     such notice,  the Indemnified Party shall permit the Indemnifying  Party to
     assume  control of such Claim (to the extent  only that such  Claim,  legal
     action or other matter relates to a Loss for which the  Indemnifying  Party
     is liable),  including the  determination of all appropriate  actions,  the
     negotiation  of  settlements on behalf of the  Indemnified  Party,  and the
     conduct of litigation through attorneys of the Indemnifying Party's choice;
     provided,  however,  that no such settlement can result in any liability or
     cost to the  Indemnified  Party for which it is entitled to be  indemnified
     hereunder without its consent.  If the Indemnifying  Party elects to assume
     control,  (i) any expense incurred by the Indemnified  Party thereafter for
     investigation  or defense of the matter  shall be borne by the  Indemnified
     Party, and (ii) the Indemnified Party shall give all reasonable information
     and assistance,  other than pecuniary,  that the  Indemnifying  Party shall
     deem necessary to the proper defense of such Claim,  legal action, or other
     matter. In the absence of such an election,  the Indemnified Party will use
     its best efforts to defend, at the Indemnifying Party's expense, any claim,
     legal  action or other matter to which such other  Party's  indemnification
     under this Article 10 applies  until the  Indemnifying  Party  assumes such
     defense, and, if the Indemnifying Party fails to assume such defense within
     the time period provided above,  settle the same in the Indemnified Party's
     reasonable  discretion at the Indemnifying Party's expense. If such a Claim
     requires immediate action,  both the Indemnified Party and the Indemnifying
     Party will cooperate in good faith to take appropriate  action so as not to
     jeopardize defense of such Claim or either Party's position with respect to
     such Claim.

          (d) Dispute. If the existence of a valid Claim or amount to be paid by
     an  Indemnifying  Party  is  in  dispute,   the  parties  agree  to  submit
     determination  of the  existence  of a valid Claim or the amount to be paid
     pursuant to the Claim  Notice to binding  arbitration  in Denver,  Colorado
     such  arbitration to be conducted as follows:  The  arbitration  proceeding
     shall be governed by Colorado law and shall be conducted in accordance with
     the Commercial  Arbitration Rules of the American  Arbitration  Association
     ("AAA"),  with  discovery to be conducted  in  accordance  with the Federal
     Rules of Civil Procedure, and with any disputes over the scope of discovery
     to be  determined by the  arbitrators.  The  arbitration  shall be before a
     three person panel of neutral  arbitrators,  consisting  of one person from
     each of the following categories:  (1) an attorney who has practiced in the
     area of oil and gas law for at least 10 years;  (2) a retired  judge at the
     United States District Court or Appellate  Court level having  jurisdiction
     in Colorado or Wyoming;  and (3) a person with at least 10 years of oil and
     gas  industry  experience  as a petroleum  engineer and  experience  in the
     geologic  basin where the Property is located.  The AAA shall submit a list
     of  persons  meeting  the  criteria  outlined  above for each  category  of
     arbitrator,  and the parties  shall select one person from each category in
     the manner  established by the AAA. The arbitrators shall conduct a hearing
     no later than 60 days after submission of the matter to arbitration,  and a
     written decision shall be rendered by the arbitrators within 30 days of the
     hearing.  At the  hearing,  the parties  shall  present  such  evidence and
     witnesses as they may choose, with or without counsel.  Adherence to formal
     rules of evidence  shall not be required  but the  arbitration  panel shall
     consider any evidence and testimony  that it determines to be relevant,  in
     accordance with procedures that it determines to be appropriate.  Any award
     entered in the  arbitration  shall be made by a written opinion stating the
     reasons and basis for the award made and any  payment  due  pursuant to the
     arbitration shall be made within 15 days of the arbitrators'  decision. The
     final decision may be filed in a court of competent jurisdiction and may be
     enforced by any party as a final  judgment of such court.  Each party shall
     bear its own costs and expenses of the arbitration, provided, however, that
     the costs of employing the arbitrators  shall be borne 50% by Shama Zoe and
     50% by Gasco.

     10.5 No  Insurance;  Subrogation.  The  indemnifications  provided  in this
Article 10 shall not be  construed as a form of  insurance.  Gasco and Shama Zoe
hereby waive for themselves,  their  successors or assigns,  including,  without
limitation, any insurers, any rights to subrogation for Losses for which each of
them is respectively  liable or against which each respectively  indemnifies the
other, and, if required by applicable policies, Gasco and Shama Zoe shall obtain
waiver of such subrogation from their respective insurers.

     10.6 Reservation as to Non-Parties.  Nothing herein is intended to limit or
otherwise  waive any recourse  Gasco or Shama Zoe may have against any non-party
for any  obligations  or  liabilities  that may be incurred  with respect to the
Property.

                                   ARTICLE XI
                                  MISCELLANEOUS

     11.1 Expenses.  Except as otherwise  specifically provided, all fees, costs
and expenses  incurred by Gasco or Shama Zoe in negotiating this Agreement or in
consummating  the  transactions  contemplated by this Agreement shall be paid by
the party incurring the same, including, without limitation,  engineering, land,
title, legal and accounting fees, costs and expenses.

     11.2 Notices.  All notices and  communications  required or permitted under
this  Agreement  shall be in  writing  and  addressed  as set forth  below.  Any
communication  or delivery  hereunder shall be deemed to have been duly made and
the  receiving  party  charged  with notice (i) if  personally  delivered,  when
received,  (ii) if sent by telecopy or  facsimile  transmission,  when  received
(iii) if mailed, 5 business days after mailing,  certified mail,  return receipt
requested,  or (iv) if sent by overnight  courier,  one day after  sending.  All
notices shall be addressed as follows:

         If to Shama Zoe:

                  Shama Zoe Limited Partnership
                  7128 South Poplar Lane
                  Englewood, Colorado 80112
                  Attention:  Gilman Hill
                  Telephone:  303-771-1101
                  Fax:  303-771-1134

         If to Gasco:

                  Gasco Energy, Inc.
                  14 Inverness Drive East, Suite 236
                  Englewood, Colorado 80112
                  Attention:  Howard Sharpe
                  Telephone:  (303) 713-0054
                  Fax:  303-483-0011

Any party may, by written notice so delivered to the other  parties,  change the
address or individual to which delivery shall thereafter be made.

     11.3  Amendments.  Except for  waivers  specifically  provided  for in this
Agreement,  this  Agreement may not be amended nor any rights  hereunder  waived
except by an instrument  in writing  signed by the party to be charged with such
amendment  or waiver  and  delivered  by such  party to the party  claiming  the
benefit of such amendment or waiver.

     11.4 Assignment. Gasco and Shama Zoe shall not assign all or any portion of
its respective  rights or delegate all or any portion of its  respective  duties
under this Agreement unless it continues to remain liable for the performance of
its obligations hereunder.

     11.5 Headings.  The headings of the Articles and Sections of this Agreement
are for  guidance  and  convenience  of  reference  only and  shall not limit or
otherwise affect any of the terms or provisions of this Agreement.

     11.6  References.  References  made in this  Agreement,  including use of a
pronoun,  shall be deemed to  include  where  applicable,  masculine,  feminine,
singular or plural, individuals or entities. As used in this Agreement, "person"
shall  mean  any  natural  person,  corporation,   partnership,  trust,  limited
liability company, court, agency, government, board, commission, estate or other
entity or authority.

     11.7 Governing Law. This Agreement and the transactions contemplated hereby
and any  arbitration or dispute  resolution  conducted  pursuant hereto shall be
construed in accordance with, and governed by, the laws of the State of Colorado
without reference to the conflict of laws principles thereof.

     11.8 Entire Agreement.  This Agreement constitutes the entire understanding
among the parties, their respective partners, shareholders,  officers, directors
and  employees  with  respect to the  subject  matter  hereof,  superseding  all
negotiations, prior discussions and prior agreements and understandings relating
to such subject matter; provided,  however, that without limiting the generality
of  the  foregoing,  this  Agreement  is  the  result  of  a  renegotiation  and
restructuring of transactions originally set forth in a letter agreement between
Shama Zoe and Pannonian,  dated February 11, 2002 (the "February 11 Agreement"),
and until the Closing,  (a) the February 11 Agreement shall remain in full force
and effect except that the $300,000  option payment due on May 15, 2002 shall be
eliminated,  and (b) the  provisions  of the February 11 Agreement  will control
over any contrary  provisions of this  Agreement;  provided,  however,  that the
provisions of this Agreement shall apply to the maximum extent not  inconsistent
with the February 11  Agreement.  After the Closing,  the February 11 Agreement,
and as of the date  hereof,  all other  agreements  between the  parties  hereto
relating  to the subject  matter  hereof,  shall be  completely  superseded  and
replaced by this Agreement.

     11.9  Knowledge.  The  knowledge of a party shall mean for purposes of this
Agreement,  the  actual,  conscious  knowledge  of the  party  at the  time  the
assertion  regarding  knowledge is made  including  such knowledge as would have
been obtained by a reasonable and prudent  operator given the  circumstances  in
question.  If the party is a  corporation  or other  entity other than a natural
person,  knowledge of such party shall mean the such actual, conscious knowledge
must be on the part of the person having supervising  management  authority over
the matters to which such knowledge  pertains  including such knowledge as would
have been obtained by a reasonable and prudent operator given the  circumstances
in question.

     11.10 Binding Effect. This Agreement shall be binding upon, and shall inure
to the benefit of, the  parties  hereto,  and their  respective  successors  and
assigns.

     11.11 Limitation on Damages. The parties expressly waive any and all rights
to consequential, special, incidental, punitive or exemplary damages, or loss of
profits resulting from breach of this Agreement.

     11.12 No Third-Party  Beneficiaries.  This Agreement is intended to benefit
only the parties hereto and their respective permitted successors and assigns.

     11.13  Severability.  If at any time  subsequent  to the date  hereof,  any
provision of this Agreement shall be held by any court of competent jurisdiction
to be illegal,  void or  unenforceable,  such provision shall be of no force and
effect, but the illegality or  unenforceability  of such provision shall have no
effect upon and shall not impair the  enforceability  of any other  provision of
this Agreement.

     11.14 Waiver. No consent or waiver, express of implied, to or of any breach
or default in the  performance  of any  obligation or covenant  hereunder  shall
constitute  a consent  or waiver to or of any  other  breach or  default  in the
performance of the same or any other obligations hereunder.

     11.15 Survival. The representations,  warranties,  covenants and agreements
made herein shall survive the Closing.






     IN WITNESS WHEREOF, the parties have executed this Agreement as of the date
first set forth above.


SHAMA ZOE LIMITED PARTNERSHIP               GASCO ENERGY, INC.



By:                                          By:
- -----------------------------                ----------------------------------
   Gilman Hill, General Partner                 Mark A. Erickson, President