EXHIBIT 10-11

                    ASSIGNMENT, CONVEYANCE AND BILL OF SALE
                    ---------------------------------------

     THIS ASSIGNMENT, CONVEYANCE AND BILL OF SALE (hereinafter referred to as
"this Assignment"), dated effective as of December 1, 1995 at 7:00 a.m. at the
location of the properties (hereinafter referred to as the "Effective Time"), is
from AMERAC ENERGY CORPORATION, formerly known as Wolverine Exploration Company,
a Delaware corporation (hereinafter referred to as "Assignor"), the address of
which is 700 Louisiana, Suite 3330, Houston, Texas 77002-2730, to MULL DRILLING
COMPANY, INC., a Kansas corporation (hereinafter referred to as "Assignee"), the
address of which is 221 North Main Street, Suite 300, Wichita, Kansas 67202.

     For Ten Dollars ($10.00) and other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged by Assignor, Assignor
has transferred, granted bargained, sold, conveyed and assigned, and does hereby
transfer, grant, bargain, sell, convey and assign to Assignee all of Assignor's
right, title and interest of any and every nature whatsoever in and to the
following (all of which are hereinafter collectively referred to as the
"Properties"):

     A.  The Oil and Gas Leases described in Exhibit "A" attached hereto and
made a part hereof (hereinafter referred to as the "Leases"), insofar and only
insofar as the Leases cover the lands described in Exhibit "A" (hereinafter
referred to as the "Lands");

     B.  All agreements affecting the Leases insofar as they cover the Lands,
including, but not limited to, all unit agreements including the Unit Agreement
for the Northwest Arapahoe Unit, unit operating agreements including the Unit
Operating Agreement for the Northwest Arapahoe Unit, operating agreements,
farmout agreements, assignments, gas sale contracts, gas processing contracts,
and all other agreements, surface leases, permits, rights-of-ways, easements,
licenses and authorizations in any way relating the Leases insofar as they cover
the Lands.

     C.  All wells located on the Lands or on lands pooled, communitized or
unitized therewith, together with the personal property, fixtures, improvements
and other property, whether real, personal or mixed, on, appurtenant to or used
or obtained by Assignor in connection with such wells or with the production
therefrom.

     D.  All oil, gas, casinghead gas, condensate, distillate, liquid
hydrocarbons, gaseous hydrocarbons, products refined and manufactured therefrom,
helium, other minerals, and the accounts and proceeds from the sale of all of
the foregoing to the extent that such production is produced from the Lands or
from lands pooled, communitized or unitized therewith after the Effective Time.

     TO HAVE AND TO HOLD the Properties unto Assignee and its successors and
assigns forever.

     This Assignment is made and accepted expressly subject to the following:

     1.  All obligations with respect to the maintenance and daily operation of
the Properties, including any ad valorem, production, severance, excise or other
similar taxes and assessments (other than taxes measured by the income or
profits of Assignor) shall be apportioned between Assignor Assignee as of the
Effective Time.  Notwithstanding any other provision contained herein, all such
taxes based on or measured by the ownership of the Properties during calendar
year 1994, the production from the Properties during calendar year 1994 or the
receipt of proceeds from the Properties during calendar year 1994 shall remain
the responsibility of Assignor; and all such taxes based on or measured by the
ownership of the Properties during calendar year 1995, the production from the
Properties during calendar year 1995 or the receipt of proceeds from the
Properties during calendar year 1995 

 
shall be prorated between Assignor and Assignee as of the Effective Time.

     2.  Assignor warrants to Assignee, and its successors and assigns, that
Assignor's title to the Properties is free and clear of all liens, encumbrances,
burdens, claims and defects of title arising by, through or under Assignor, and
that Assignor has not previously transferred the Properties.

     3.  Assignor hereby transfers and quitclaims to Assignee, and its
successors and assigns, to the extent to transferable, the benefit of and the
right to enforce the covenants and warranties, if any, which Assignor is
entitled to enforce with respect to the Properties against Assignor's
predecessors in title to the Properties.

     4.  Assignor represents and warrants to Assignee that:

          (a) Assignor is duly incorporated and existing under the laws of the
     State of Delaware and is duly authorized and qualified to transact business
     in the State of Colorado; all franchise taxes due from Assignor have been
     paid; Assignor is in good standing in each such jurisdiction; and Assignor
     has all requisite power and authority, corporate or otherwise, to conduct
     its business and to own the Properties.

          (b) Assignor has all requisite power and authority to execute and
     deliver, and to perform all its obligations under, this Assignment and all
     other documents and instruments executed in connection herewith, and the
     execution and delivery by Assignor of this Assignment and all other
     documents contemplated hereby or referred to herein, and the performance by
     Assignor of the promises, covenants and the agreements herein made by
     Assignor, will not be in violation of its charter, by-laws or any agreement
     or indenture to which Assignor is subject or by which it is bound.

          (c) The execution and delivery by Assignor of this Assignment and all
     other documents contemplated hereby or referred to herein have been duly
     authorized by all necessary corporate action and do not and will not: (I)
     require any consent or approval of any of its stockholders, (ii) violate
     its charter or by-laws, or (iii) violate provisions of any law, rule,
     regulation, order, writ, judgment, injunction, decree, determination or
     award presently in effect having applicability to it.

          (d) No authorization, consent, approval, license, exemption of or
     filing or registration with any court or governmental department,
     commission, board, bureau, agency or instrumentality, domestic or foreign,
     is or will be necessary to the valid execution, delivery or performance by
     Assignor of this Assignment or any other document contemplated hereby or
     referred to herein, other than approval by the Bureau of Land Management of
     the Assignment of the Federal Oil and Gas Lease.

          (e) This Assignment constitutes the legal, valid and binding
     obligation of Assignor, enforceable against Assignor in accordance with its
     terms, except as limited by bankruptcy, insolvency or other laws of general
     application relating to the enforcement of creditors' rights.

          (f) Assignor has not incurred any obligation or liability, contingent
     or otherwise, for brokers' or finders' fees in respect of the matters
     provided for in this Assignment, and , if any such obligation or liability
     exists, it shall be the sole obligation of Assignor, and Assignee shall
     have no responsibility therefor.

                                      -2-

 
          (g) The representations and warranties of Assignor made in this
     Assignment or in any other document referred to herein and delivered or to
     be delivered by Assignor pursuant hereto do not contain and will not
     contain any untrue statements of a material fact or omit to state a
     material fact necessary in order to make the statements herein or therein,
     in light of the circumstances under which they were made, not misleading,
     and Assignor is unaware of any allegations, demands or notices, oral or
     written, from any of the lessors of the Leases regarding the validity of
     the Leases, and there are no other material facts or circumstances known to
     Assignor that may affect the ownership or validity of Assignor's title to
     the Properties that are not disclosed herein.

     5.  Assignee represents and warrants to Assignor that:

          (a) Assignee is duly incorporated and existing under the laws of the
     State of Kansas and is duly authorized and qualified to transact business
     in the State of Colorado; all franchise taxes due from Assignee have been
     paid; Assignee is in good standing in each such jurisdiction; and Assignee
     has all requisite power and authority, corporate or otherwise, to conduct
     its business and to own the Properties .

          (b) Assignee has all requisite power and authority to execute and
     deliver, and to perform all its obligations under, this Assignment and all
     other documents and instruments executed in connection herewith, and the
     execution and delivery by Assignee of this Assignment and all other
     documents contemplated hereby or referred to herein, and the performance by
     Assignee of the promises, covenants and agreements herein made by Assignee,
     will not be in violation of its charter, by-laws or any agreement or
     indenture to which it is subject or by which it is bound.

          (c) The execution and delivery by Assignee of this Assignment and all
     other documents contemplated hereby or referred to herein have been duly
     authorized by all necessary corporate action and do not and will not: (I)
     require any consent or approval of any of its stockholders, (ii) violate
     its charter or by-laws, or (iii) violate provisions of any law, rule,
     regulation, order, writ, judgment, injunction, decree, determination or
     award presently in effect having applicability to it.

          (d) No authorization, consent, approval, license, exemption of or
     filing or registration with any court or governmental department,
     commission, board, bureau, agency or instrumentality, domestic or foreign,
     is or will be necessary to the valid execution, delivery or performance by
     Assignee of this Assignment or any other document contemplated hereby or
     referred to herein, other than approval by the Bureau of Land Management of
     the assignment of the Federal Oil and Gas Lease.

          (e) This Assignment constitutes the legal, valid and binding
     obligation of Assignee, enforceable against Assignee in accordance with its
     terms, except as limited by bankruptcy, insolvency or other laws of general
     application relating to the enforcement of creditors' rights.

          (f) Assignee has not incurred any obligation or liability, contingent
     or otherwise, for brokers' or finders' fees in respect of the matters
     provided for in this Assignment, and , if any such obligation or liability
     exists, it shall be the sole obligation of Assignee, and Assignor shall
     have no responsibility therefor.

                                      -3-

 
          (g) The representations and warranties of Assignee made in this
     Assignment or in any other document referred to herein an delivered or to
     be delivered by Assignee pursuant hereto do not contain and will not
     contain any untrue statements of a material fact or omit to state a
     material fact necessary in order to make the statements herein or therein,
     in light of the circumstances under which they were made, not misleading.

     6.  Each party, at the request of the other and without further
consideration, will from time to time execute and delivery such other and
further instruments, make such cash payments, deliver such documents and
records, and do and perform such other and further acts and things as may be
necessary or appropriate to effect the purpose and intent of this Assignment,
including, but not limited to, the execution of transfer orders and title
curative instruments.

     7.  In connection with the Leases which are Federal Oil and Gas Leases,
assignments of record title and/or operating rights will be executed
concurrently herewith by Assignor to Assignee in sufficient counterparts to
fulfill applicable Federal statutory and regulatory requirements, and while such
assignments will be unqualified in form and will not specifically contain all of
the terms and conditions hereof, they shall be deemed to contain all of the
terms and conditions set forth herein as fully to all intents and purposes as
though the same were set forth at length in each such assignment.  The interest
conveyed by such separate assignments are the same as, and not in addition to,
the interests herein conveyed.

     8.  This Assignment may be executed in any number of counterparts with the
same effect as if both parities had executed the same copy.  Each counterpart
shall be deemed an original for all purposes and all counterparts shall together
constitute but one and the same instrument.

     9.  This Assignment shall be binding upon and inure to the benefit of
Assignor and Assignee and their respective successors and assigns.

     EXECUTED on the dates contained in the acknowledgments of this Assignment
to be effective for all purposes as of the Effective Time.

[SEAL]                                 AMERAC ENERGY CORPORATION, formerly 
                                       known as Wolverine Exploration Company

                                       By /s/ Jeffrey B. Robinson
                                       ---------------------------------------
                                                 Jeffrey B. Robinson
                                                     President
ATTEST:

  /s/ Mary Ann Arnold
- -----------------------
    Mary Ann Arnold
       Secretary



                                       MULL DRILLING COMPANY, INC.

                                       By /s/ Mark A. Shreve
                                       ---------------------------------------
                                                   Mark A. Shreve
                                                      President
Attest:


        /s/ Gary D. Turybury
    -------------------------------------------
                 Gary D. Turybury
                    Secretary

                                      -4-

 
STATE OF      TEXAS             )
        ------------------------ 
                                ) ss.
COUNTY OF     HARRIS            )
         ----------------------- 


     The foregoing instrument was acknowledged before me this day of 04th day of
January, 1996, by Jeffrey B. Robinson, as President of AMERAC ENERGY
CORPORATION, formerly known as Wolverine Exploration Company, a Delaware
corporation, on behalf of the corporation.

     WITNESS my hand and official seal.

     My commission expires:  November 28, 1998.


[SEAL]
                   /s/ M. A. Arnold
             ------------------------------
                    Notary Public



 
STATE OF      KANSAS            )
        ------------------------ 
                                ) ss.
COUNTY OF     SEDGWICK          )
         ----------------------- 


     The foregoing instrument was acknowledged before me this 17th day of
January, 1996, by Mar A. Shreve as President of MULL DRILLING COMPANY, INC., a
Kansas corporation, on behalf of the corporation.


     WITNESS my hand and official seal.

     My commission expires:  October 14, 1998.



                   /s/ Maria R. Olmstead
             ------------------------------
                      Notary Public
                    Maria R. Olmstead

[SEAL]

                                      -5-