HS RESOURCES INC
10-Q, 1997-08-14
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   FORM 10-Q

(Mark One)

[X]      QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934

For the quarterly period ended      June 30, 1997
                               ------------------------------------------------
                                                             OR
[ ]      TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934

For the transition period from                      to
                               --------------------    ------------------------

Commission file number     0-18886
                      ---------------------------------------------------------

                               HS RESOURCES, INC.
- -------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)

         Delaware                                    94-3036864
- ----------------------------------------  ------------------------------------
(State or other jurisdiction of           (I.R.S. Employer Identification No.)
incorporation or organization)

One Maritime Plaza, Fifteenth Floor
San Francisco, California                                    94111
- ----------------------------------------  ------------------------------------
(Address of principal executive offices)                   (Zip Code)

Registrant's telephone number, including area code            (415) 433-5795
                                                  -----------------------------

- -------------------------------------------------------------------------------
             (Former name, former address and former fiscal year,
                         if changed since last report)

     Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes X     No     
                                             ---      ---
                APPLICABLE ONLY TO ISSUER INVOLVED IN BANKRUPTCY
                  PROCEEDINGS DURING THE PRECEDING FIVE YEARS:

     Indicate by check mark whether the registrant has filed all documents and
reports required to be filed by Sections 12, 13, or 15(d) of the Securities
Exchange Act of 1934 subsequent to the distribution of securities under a plan
confirmed by a court. Yes      No     
                         ---     ---
                     APPLICABLE ONLY TO CORPORATE ISSUERS:

Number of shares of Common Stock, $.001 par value, outstanding as of the close
of business on August 6, 1997: 16,978,206 after deducting 160,358 shares in
treasury.


<PAGE>   2



                               HS RESOURCES, INC.

                                     INDEX

<TABLE>
<CAPTION>
                                                                                                     Page
                                                                                                     ----
<S>                 <C>                                                                               <C>
PART I.  FINANCIAL INFORMATION

         Item 1.    Financial Statements

                    Consolidated Financial Statements:

                    Consolidated Balance Sheets - June 30, 1997 (Unaudited) and
                    December 31, 1996..................................................................3

                    Unaudited Consolidated Statements of Operations - For the Three Months
                    and Six Months Ended June 30, 1997 and 1996........................................5

                    Consolidated Statements of Stockholders' Equity - For the
                    Years Ended December 31, 1996 and 1995 and the Six Months
                    Ended June 30, 1997 (Unaudited)....................................................6

                    Unaudited Consolidated Statements of Cash Flows -
                    For the Six Months Ended June 30, 1997 and 1996....................................7

                    Notes to Unaudited Consolidated Financial Statements...............................8

         Item 2.    Management's Discussion and Analysis of Financial Condition and
                    Results of Operations.............................................................12

PART II.  OTHER INFORMATION

         Item 1.    Legal Proceedings and Environmental Issues........................................21

         Item 2.    Changes in Securities.............................................................22

         Item 3.    Defaults Upon Senior Securities...................................................22

         Item 4.    Submission of Matters to a Vote of Security Holders...............................22

         Item 5.    Other Information.................................................................22

         Item 6.    Exhibits and Reports on Form 8-K..................................................22
</TABLE>



                                       2

<PAGE>   3



                         PART I. FINANCIAL INFORMATION


Item 1. Financial Statements


                               HS RESOURCES, INC.
                          CONSOLIDATED BALANCE SHEETS
                      JUNE 30, 1997 AND DECEMBER 31, 1996

<TABLE>
<CAPTION>
                                                                                June 30,        December 31,
                                                                                  1997              1996
                                                                               (Unaudited)
                                                                              --------------    --------------
<S>                                                                           <C>               <C>           
ASSETS
CURRENT ASSETS
   Cash and cash equivalents                                                  $    2,578,941    $    8,764,756
   Margin deposits                                                                   585,141           575,712
   Accounts receivable
          Oil and gas sales                                                       19,158,099        22,601,396
          Trading and transportation                                               9,703,632        17,786,206
          Trade                                                                    2,596,896         2,255,359
          Other                                                                    6,257,573         5,625,980
   Lease and well equipment inventory, at cost                                     1,500,439         1,724,944
   Prepaid expenses and other                                                        966,447           513,471
   Oil and gas properties held for resale (Note 3)                                24,409,000                --
                                                                              --------------    --------------
          Total current assets                                                    67,756,168        59,847,824
                                                                              --------------    --------------
OIL AND GAS PROPERTIES, AT COST, USING THE FULL COST METHOD
   Undeveloped acreage                                                            63,644,927        54,709,553
   Costs subject to depreciation, depletion and amortization                     727,222,297       727,411,293
   Less accumulated depreciation, depletion and amortization                    (154,314,535)     (129,940,868)
                                                                              --------------    --------------
          Net oil and gas properties                                             636,552,689       652,179,978
                                                                              --------------    --------------
GAS GATHERING AND TRANSPORTATION FACILITIES,
   at cost, net of accumulated depreciation of $1,176,554 and
   $1,032,224 at June 30, 1997 and December 31, 1996, respectively                 4,645,582         4,674,075
                                                                              --------------    --------------
OTHER ASSETS
   Deferred charges and other, net                                                 8,548,544         8,954,781
   Office and transportation equipment and other property,
          net of accumulated depreciation of $4,329,948 and
          $3,401,739 at June 30, 1997 and December 31, 1996, respectively          4,551,147         4,708,436
   Investment in Oil and Gas Limited Partnership                                     890,289           920,285
                                                                              --------------    --------------
          Total other assets                                                      13,989,980        14,583,502
                                                                              --------------    --------------
TOTAL ASSETS                                                                  $  722,944,419    $  731,285,379
                                                                              ==============    ==============
</TABLE>



              The accompanying notes are an integral part of these
                       consolidated financial statements.


                                       3

<PAGE>   4
                              HS RESOURCES, INC.
                         CONSOLIDATED BALANCE SHEETS
                     JUNE 30, 1997 AND DECEMBER 31, 1996



<TABLE>
<CAPTION>
                                                                        June 30,     December 31,
                                                                          1997           1996
                                                                       (Unaudited)
                                                                       -----------   ------------
<S>                                                                    <C>           <C>
LIABILITIES AND STOCKHOLDERS' EQUITY
CURRENT LIABILITIES
   Accounts payable
      Trade                                                           $ 15,541,107   $  9,124,831
      Revenue                                                           15,299,635      8,134,201
      Gas purchases                                                      8,138,483     13,878,187
   Accrued expenses
      Ad valorem and production taxes                                    8,008,737      7,516,095
      Interest                                                           2,785,018      3,179,627
      Other                                                              2,823,935      4,235,410
   Current portion of long-term debt (Note 3)                           24,439,000         30,000
                                                                      ------------   ------------
      Total current liabilities                                         77,035,915     46,098,351
                                                                      ------------   ------------
ACCRUED AD VALOREM TAXES                                                 6,677,170      9,005,922
                                                                      ------------   ------------
LONG-TERM OIL AND GAS PRODUCTION NOTE PAYABLE                              734,696        734,696
                                                                      ------------   ------------
LONG-TERM BANK DEBT, NET OF CURRENT PORTION                            128,591,000    174,000,000
                                                                       ------------   ------------
9 7/8% SENIOR SUBORDINATED NOTES,
   due 2003, net of unamortized discount of
   $375,375 and $404,625 at June 30, 1997 and
   December 31, 1996, respectively                                      74,624,625     74,595,375

9 1/4% SENIOR SUBORDINATED NOTES,
   due 2006, net of unamortized discount of
   $728,437 and $767,287 at June 30, 1997 and
   December 31, 1996, respectively                                     149,271,563    149,232,713
                                                                      ------------   ------------
DEFERRED INCOME TAXES                                                   88,231,217     84,828,612
                                                                      ------------   ------------
COMMITMENTS AND CONTINGENCIES
                                                                      ------------   ------------
MINORITY INTEREST IN OIL AND GAS LIMITED
   PARTNERSHIP                                                               7,936         66,149
                                                                      ------------   ------------
STOCKHOLDERS' EQUITY
   Preferred stock                                                            --             --
   Common stock, $.001 par value, 30,000,000
      shares authorized; 17,138,564 and
      17,127,861 shares issued and outstanding
      at June 30, 1997 and December 31, 1996,
      respectively                                                          17,139         17,128
   Additional paid-in capital                                          163,140,440    163,114,868
   Retained earnings                                                    36,961,516     31,433,399
   Deferred compensation                                                  (180,250)      (171,300)
   Treasury stock, at cost, 160,358 and
      121,952 shares at June 30, 1997 and
      December 31, 1996, respectively                                   (2,168,548)    (1,670,534)
                                                                      ------------   ------------
      Total stockholders' equity                                       197,770,297    192,723,561
                                                                      ------------   ------------
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY                            $722,944,419   $731,285,379
                                                                      ============   ============
</TABLE>

              The accompanying notes are an integral part of these
                       consolidated financial statements.




                                      4
<PAGE>   5



                               HS RESOURCES, INC.
                     CONSOLIDATED STATEMENTS OF OPERATIONS
            THREE MONTHS AND SIX MONTHS ENDED JUNE 30, 1997 AND 1996
                                  (Unaudited)


<TABLE>
<CAPTION>
                                                        Three Months Ended           Six Months Ended
                                                            June 30,                     June 30,
                                                  ---------------------------   ---------------------------
                                                     1997            1996           1997           1996
                                                  ------------   ------------   ------------   ------------
<S>                                               <C>            <C>            <C>            <C>         
REVENUES
   Oil and gas sales                              $ 30,097,353   $ 21,282,730   $ 66,121,529   $ 34,962,160
   Trading and transportation                       23,616,761      4,853,241     56,390,532      4,853,241
   Other gas revenues                                1,093,645        630,641      2,189,247      1,104,704
   Interest income and other                           354,228         62,991        622,493        103,782
                                                  ------------   ------------   ------------   ------------
       Total revenues                               55,161,987     26,829,603    125,323,801     41,023,887
                                                  ------------   ------------   ------------   ------------
EXPENSES
   Production taxes                                  2,027,486      1,624,833      4,833,740      2,689,821
   Lease operating                                   5,940,672      3,110,448     12,370,884      5,936,771
   Cost of trading and transportation               23,491,736      4,732,728     55,465,131      4,732,728
   Depreciation, depletion and amortization         12,850,061      9,084,532     25,315,543     15,191,958
   General and administrative                        1,304,383        899,501      3,031,426      1,762,293
   Interest                                          7,672,671      4,720,530     15,376,355      7,744,682
                                                  ------------   ------------   ------------   ------------
       Total expenses                               53,287,009     24,172,572    116,393,079     38,058,253
                                                  ------------   ------------   ------------   ------------
INCOME BEFORE PROVISION FOR INCOME TAXES             1,874,978      2,657,031      8,930,722      2,965,634
PROVISION FOR INCOME TAXES                             714,367      1,012,330      3,402,605      1,129,907
                                                  ------------   ------------   ------------   ------------
NET INCOME                                        $  1,160,611   $  1,644,701   $  5,528,117   $  1,835,727
                                                  ------------   ------------   ------------   ------------
EARNINGS PER SHARE
   Earnings per common and common
       equivalent share                           $       0.07   $       0.14   $       0.32   $       0.16
                                                  ------------   ------------   ------------   ------------
   Earnings per common and common
       equivalent share assuming full
       dilution                                   $       0.07   $       0.14   $       0.32   $       0.16
                                                  ------------   ------------   ------------   ------------
WEIGHTED AVERAGE NUMBER OF SHARES
  OUTSTANDING
   Weighted average number of common and
       common equivalent shares                     17,423,000     12,058,000     17,500,000     11,604,000
                                                  ------------   ------------   ------------   ------------
   Weighted average number of common and
       common equivalent shares assuming
       full dilution                                17,495,000     12,058,000     17,535,000     11,604,000
                                                  ------------   ------------   ------------   ------------
</TABLE>



              The accompanying notes are an integral part of these
                       consolidated financial statements.




                                       5
<PAGE>   6



                               HS RESOURCES, INC.
                CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
                 FOR THE YEARS ENDED DECEMBER 1996 AND 1995 AND
                       THE SIX MONTHS ENDED JUNE 30, 1997



<TABLE>
<CAPTION>
                                                Common Stock         Additional                                Treasury Stock
                                             -------------------      Paid-In       Retained    Deferred   ----------------------
                                               Shares     Amount      Capital       Earnings  Compensation  Shares       Amount
                                             ----------  -------  -------------   -----------  ---------   --------   ----------- 
<S>                                          <C>          <C>     <C>             <C>          <C>          <C>       <C>         
Balance, December 31, 1994                   10,948,680   10,949  $  97,720,356   $22,210,416  $      --    (40,313)  $  (584,109)
  Purchase of treasury stock                         --       --             --            --         --    (63,700)     (846,625)
  Transfer of treasury stock to 401(k) Plan          --       --          3,328            --         --     26,536       358,287
  Exercise of options by issuance
    of treasury stock, including
    income tax benefit                               --       --         (5,776)           --         --      2,400        33,144
  Net income                                         --       --             --       274,156         --         --            -- 
                                             ----------  -------  -------------   -----------  ---------   --------   ----------- 
Balance, December 31, 1995                   10,948,680   10,949     97,717,908    22,484,572         --    (75,077)   (1,039,303)
  Purchase of treasury stock                         --       --             --            --         --   (113,817)   (1,460,490)
  Transfer of treasury stock to 401(k) Plan          --       --        (53,961)           --         --     20,025       246,708
  Issuance of common stock for Tide West
    acquisition                               6,169,181    6,169     65,231,025            --         --         --            -- 
  Exercise of options by issuance
    of treasury stock, including
    income tax benefit                               --       --         48,606            --         --     46,917       582,551
  Issuance of restricted stock                   10,000       10        171,290            --   (171,300)        --            -- 
  Net income                                         --       --             --     8,948,827         --         --            -- 
                                             ----------  -------  -------------   -----------  ---------   --------   ----------- 
Balance, December 31, 1996                   17,127,861   17,128    163,114,868    31,433,399   (171,300)  (121,952)   (1,670,534)
  Purchase of treasury stock                         --       --             --            --         --    (87,047)   (1,157,935)
  Transfer of treasury stock to 401(k) Plan          --       --        (68,011)           --         --     35,894       485,287
  Exercise of options by issuance
    of treasury stock, including
    income tax benefit                               --       --        (38,811)           --         --     12,747       174,634
  Issuance of restricted stock                    2,500        3         44,997            --    (45,000)        --            -- 
  Amortization of deferred compensation              --       --             --            --     36,050         --            -- 
  Exercise of options by issuance
    of common stock, including
    income tax benefit                            8,203        8         87,397            --         --         --            -- 
  Net income                                         --       --             --     5,528,117         --         --            -- 
                                             ----------  -------  -------------   -----------  ---------   --------   ----------- 
Balance, June 30, 1997
  (Unaudited)                                17,138,564  $17,139  $ 163,140,440   $36,961,516  $(180,250)  (160,358)  $(2,168,548)
                                             ==========  =======  =============   ===========  =========   ========   =========== 
</TABLE>


              The accompanying notes are an integral part of these
                       consolidated financial statements.





                                       6
<PAGE>   7



                               HS RESOURCES, INC.
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                    SIX MONTHS ENDED JUNE 30, 1997 AND 1996
                                  (Unaudited)


<TABLE>
<CAPTION>
                                                                                                    June 30,
                                                                                         ------------------------------
                                                                                             1997             1996
                                                                                         -------------    -------------
<S>                                                                                      <C>              <C>          
CASH FLOWS FROM OPERATING ACTIVITIES
   Net income                                                                            $   5,528,117    $   1,835,727
   Adjustments to reconcile net income to net cash
          provided by operating activities
       Depreciation, depletion and amortization                                             25,315,543       15,191,958
       Amortization of deferred charges, debt issue costs and deferred compensation            915,137          403,913
       Transfer of treasury stock to the 401(k) Plan                                           417,276               -- 
       Gain on sale of fixed assets                                                                 --          (12,175)
       Deferred income tax provision                                                         3,402,605        1,125,315
       Decrease (increase) in accounts and notes receivable                                 10,552,741      (49,891,109)
       Increase (decrease) in accounts payable and accrued expenses                         (2,200,276)      15,582,670
       Other                                                                                  (196,037)      (2,013,353)
                                                                                         -------------    -------------
   Net cash provided by (used in) operating activities                                      43,735,106      (17,777,054)
                                                                                         -------------    -------------
CASH FLOWS FROM INVESTING ACTIVITIES
   Exploration, development and leasehold costs                                            (41,176,600)     (30,615,568)
   Purchase of proved and unproved properties                                                       --     (129,613,524)
   Cash payment for purchase of TideWest, net of cash acquired                                      --      (85,125,084)
   Gas gathering and transportation facilities additions                                      (115,837)        (185,048)
   Other property additions                                                                   (640,257)        (378,368)
   Proceeds from the sale of oil and gas properties                                          8,021,222               -- 
   Proceeds from the sale of fixed assets and other property                                        --           12,175
   Increase in property related payables                                                     6,400,088        9,619,169
                                                                                         -------------    -------------
   Net cash used in investing activities                                                   (27,511,384)    (236,286,248)
                                                                                         -------------    -------------
CASH FLOWS FROM FINANCING ACTIVITIES
   Proceeds from debt                                                                       22,000,000      398,593,596
   Repayments of debt                                                                      (43,000,000)    (136,758,900)
   Debt and equity issuance costs                                                             (416,617)              -- 
   Tide West acquisition costs                                                                      --       (2,694,840)
   Exercise of options                                                                         135,823          132,596
   Purchase of treasury stock                                                               (1,157,935)        (846,931)
   Issuance of common stock                                                                     87,405               -- 
   Minority interest                                                                           (58,213)              -- 
                                                                                         -------------    -------------
   Net cash (used in) provided by financing activities                                     (22,409,537)     258,425,521
                                                                                         -------------    -------------
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS                                        (6,185,815)       4,362,219
   Cash and cash equivalents, beginning of the period                                        8,764,756          116,581
                                                                                         -------------    -------------
   Cash and cash equivalents, end of the period                                          $   2,578,941    $   4,478,800
                                                                                         -------------    -------------
SUPPLEMENTAL CASH FLOW DISCLOSURE
   Interest paid, net of capitalized interest                                            $  14,689,860    $   6,486,655
   Cash paid for income taxes, net of refund                                             $    (427,231)   $          -- 
                                                                                         =============    =============
</TABLE>



              The accompanying notes are an integral part of these
                       consolidated financial statements.




                                       7
<PAGE>   8



                               HS RESOURCES, INC.
              NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS


Note 1.  General

         HS Resources, Inc., a Delaware Corporation (the "Company") was
organized in January 1987. The Company, directly or through subsidiaries,
acquires, develops and exploits oil and gas properties and markets and trades
oil and gas. The interim financial data are unaudited; however, all adjustments
(which are of a normal and recurring nature) have been made which are, in the
opinion of management, necessary for a fair statement of the financial position
of the Company at June 30, 1997, and its results of operations and cash flows
for the interim periods presented. Because of various factors, results of
operations for these periods are not necessarily indicative of results to be
expected for the full year. For a more complete understanding of the Company's
operations and financial position these statements should be read in
conjunction with audited financial statements and notes thereto included in the
Company's December 31, 1996 Annual Report on Form 10-K previously filed with
the Securities and Exchange Commission.

Note 2.  Summary of Significant Accounting Policies

         FINANCIAL INSTRUMENTS The Company engages in price and location risk
management activities for both hedging and trading purposes. Activities for
hedging purposes are entered into by the Company to manage its exposure to
price and location risks in the marketing of its oil and gas production and, in
the case of its marketing activities, third party gas. Gains and losses on
hedging positions are deferred and recognized in the period the underlying
physical transactions occur in "oil and gas sales" and "trading and
transportation revenues" (for third party gas). Activities for trading purposes
are accounted for using the mark-to-market method. Under this method, changes
in the market value of outstanding financial instruments are recognized as a
gain or loss in the period of change on a net basis in "trading and
transportation revenues." The market prices used to value these transactions
reflect management's best estimate considering various factors including
closing exchange and over-the-counter quotations, time value and volatility
factors underlying the commitments. The values are adjusted to reflect the
potential impact of liquidating the Company's position in an orderly manner
over a reasonable period of time under present market conditions.

         ACCOUNTING PRONOUNCEMENTS ISSUED BUT NOT YET EFFECTIVE Effective
January 1, 1998, the Company will adopt the provisions of the Financial
Accounting Standards Board's Statement 128, ("SFAS 128"), Earnings Per Share.
This statement modifies the earnings per share calculation and presentation in
the financial statements. Adoption of SFAS 128 is not expected to have a
material impact on the Company's financial statements.

Note 3.  Subsequent Event

         On June 30, 1997, the Company entered into an agreement to sell certain
non-core properties in Oklahoma and New Mexico to Gothic Energy Corporation.
Consideration for the transaction consists of $24.4 million in cash as well as
title to certain other producing properties near the Company's existing Arkoma
Basin assets. The agreement, effective as of July 1, 1997, is expected to close
no later than August 28, 1997. The Company plans to use the proceeds from the
sale to repay bank debt and thus has reclassified such amounts to "current
portion



                                       8

<PAGE>   9

of long-term debt". The subject properties have been classified as "oil and
gas properties held for resale", and appear in "current assets".

Note 4.  Summary of Guarantees on 9 1/4% and 9 7/8% Senior Subordinated Notes

In November 1996, the Company issued $150 million of its 9 1/4% senior
subordinated notes due in 2006. The Notes are general, unsecured obligations of
the Company, subordinated in right of payment to all existing and any future
senior indebtedness of the Company. The Notes rank pari passu with existing and
any future senior subordinated indebtedness and senior to any future
subordinated indebtedness of the Company. The Notes are fully and
unconditionally guaranteed, jointly and severally, on an unsecured, senior
subordinated basis by two of the Company's subsidiaries, Orion Acquisition, Inc.
and HSRTW, Inc. (the "Subsidiary Guarantors"). Because of the issuance of the
guaranties in connection with the Notes, under the indenture covering the 9 7/8%
Senior Subordinated Notes due 2003, the Company was required to and has issued
similar guaranties from the Subsidiary Guarantors to the trustee under that
indenture.

Sections 13 and 15 (d) of the Securities Exchange Act of 1934 require
presentation of the following supplemental condensed consolidating financial
statements of the Subsidiary Guarantors. Separate complete financial statements
of the respective Subsidiary Guarantors are not material to investors. There
are no significant contractual restrictions on distributions from each of the
Subsidiary Guarantors to the Company.

Investments in subsidiaries are accounted for by the parent under the equity
method for purposes of the supplemental condensed consolidated financial
statement presentation. Under this method, investments are recorded at cost and
adjusted for the parent company's ownership share of the subsidiaries'
cumulative results of operations. In addition, investments increase to reflect
the amount of contributions to subsidiaries and decrease to reflect the amount
of distributions from subsidiaries. The Company eliminates its investment in
subsidiaries, its equity in the earnings of subsidiaries, intercompany
payables and receivables and other transactions between subsidiaries, including
contributions and distributions.





                                       9
<PAGE>   10


                    CONDENSED CONSOLIDATING BALANCE SHEETS

                                 JUNE 30, 1997

<TABLE>
<CAPTION>
                                                               ASSETS

                                                                                           NON-
                                                               SUBSIDIARY GUARANTORS     GUARANTOR    ELIMINATION
                                                  HSR          HSRTW          ORION    SUBSIDIARIES     ENTRIES      CONSOLIDATION
                                              ------------  --------------------------  -----------  -------------   -------------
<S>                                           <C>           <C>           <C>           <C>          <C>             <C>         
Cash and cash equivalents                     $    262,484  $    175,569  $         --  $ 2,140,888  $          --   $  2,578,941
Intercompany receivables                        35,332,530    20,238,884    39,399,544   47,543,596   (142,514,554)            --
Other current assets                            14,646,890     8,206,394     4,284,224   13,885,715       (254,996)    40,768,227
Oil and gas properties held for resale                  --    16,305,000            --    8,104,000             --     24,409,000
                                              ------------  ------------  ------------  -----------  -------------   ------------

      Total current assets                      50,241,904    44,925,847    43,683,768   71,674,199   (142,769,550)    67,756,168
                                              ------------  ------------  ------------  -----------  -------------   ------------

Oil and gas properties, net                    305,826,030   207,528,748   120,470,995    2,726,916             --    636,552,689
Gas gathering and transportation facilities, 
      net                                               --            --            --    4,645,582             --      4,645,582
Deferred charges and other, net                  8,192,770            --       331,318       24,456             --      8,548,544
Office and transportation equipment and other
      property, net                              3,069,697     1,415,520            --       65,930             --      4,551,147
Investments in subsidiaries and other 
      investments                              355,872,158    19,214,664            --      890,289   (375,086,822)       890,289
                                              ------------  ------------  ------------  -----------  -------------   ------------

      Total assets                            $723,202,559  $273,084,779  $164,486,081  $80,027,372  $(517,856,372)  $722,944,419
                                              ============  ============  ============  ===========  =============   ============


                                      LIABILITIES, STOCKHOLDERS' EQUITY AND PARTNERS' CAPITAL

Current liabilities                           $ 28,681,635  $  9,298,563  $    100,880  $14,770,833  $    (254,996)  $ 52,596,915
Current portion of long-term debt               24,439,000            --            --           --             --     24,439,000
Intercompany payables                           91,780,764            --    32,229,786   18,504,004   (142,514,554)            --
Long-term bank debt and other debt, net of
      current portion                          129,325,696            --            --           --             --    129,325,696
9 7/8% senior subordinated notes, due 2003      74,624,625            --            --           --             --     74,624,625
9 1/4% senior subordinated notes, due 2006     149,271,563            --            --           --             --    149,271,563
Other noncurrent liabilities                     6,677,170            --            --           --             --      6,677,170
Deferred income taxes                           20,631,809    61,234,793     2,091,836    4,272,779             --     88,231,217
Minority interest                                       --            --            --           --          7,936          7,936
Stockholders' equity and partners' capital     197,770,297   202,551,423   130,063,579   42,479,756   (375,094,758)   197,770,297
                                              ------------  ------------  ------------  -----------  -------------   ------------
      Total liabilities, stockholders' equity
          and partners' capital               $723,202,559  $273,084,779  $164,486,081  $80,027,372  $(517,856,372)  $722,944,419
                                              ============  ============  ============  ===========  =============   ============
</TABLE>





                                       10
<PAGE>   11




                CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS

                         SIX MONTHS ENDED JUNE 30, 1997

<TABLE>
<CAPTION>
                                                                                           NON-
                                                              SUBSIDIARY GUARANTORS      GUARANTOR     ELIMINATION
                                                HSR           HSRTW          ORION      SUBSIDIARIES     ENTRIES     CONSOLIDATION
                                            ------------   ------------   -----------   ------------   ------------   -------------
<S>                                         <C>            <C>            <C>           <C>            <C>            <C>          
Revenues
      Oil and gas sales                     $ 24,943,925   $ 17,547,777   $ 5,663,269   $ 17,874,658   $     91,900   $  66,121,529
      Trading and transportation               3,951,228             --            --     63,524,614    (11,085,310)     56,390,532
      Other revenues                           2,483,517        192,065            --        392,858       (256,700)      2,811,740
                                            ------------   ------------   -----------   ------------   ------------   -------------

          Total revenues                      31,378,670     17,739,842     5,663,269     81,792,130    (11,250,110)    125,323,801
                                            ------------   ------------   -----------   ------------   ------------   -------------
Expenses
      Production taxes and lease operating     5,256,742      4,204,535     1,952,770      5,790,577             --      17,204,624
      Cost of trading and transportation       3,811,548             --            --     62,646,995    (10,993,412)     55,465,131
      Depreciation, depletion and 
         amortization                          8,827,898      7,475,635     2,106,584      6,905,426             --      25,315,543
      General and administrative               2,011,134        646,378            --        373,914             --       3,031,426
      Interest expense                        15,152,626        282,094        22,909        175,424       (256,698)     15,376,355
                                            ------------   ------------   -----------   ------------   ------------   -------------

          Total expenses                      35,059,948     12,608,642     4,082,263     75,892,336    (11,250,110)    116,393,079
                                            ------------   ------------   -----------   ------------   ------------   -------------

Income (loss) before provision for income
      taxes                                   (3,681,278)     5,131,200     1,581,006      5,899,794             --       8,930,722
Benefit (provision) for income taxes           1,402,567     (2,268,999)     (602,363)    (1,933,810)            --      (3,402,605)
                                            ------------   ------------   -----------   ------------   ------------   -------------

                                              (2,278,711)     2,862,201       978,643      3,965,984             --       5,528,117
Equity in earnings of subsidiaries             6,401,306      1,405,522            --             --     (7,806,828)             --
                                            ------------   ------------   -----------   ------------   ------------   -------------

Net income                                  $  4,122,595   $  4,267,723   $   978,643   $  3,965,984   $ (7,806,828)  $   5,528,117
                                            ============   ============   ===========   ============   ============   =============
</TABLE>




                CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS

                         SIX MONTHS ENDED JUNE 30, 1997

<TABLE>
<CAPTION>
                                                                                         
                                                                                             NON-
                                                                SUBSIDIARY   GUARANTORS    GUARANTOR    ELIMINATION
                                                  HSR           HSRTW          ORION      SUBSIDIARIES    ENTRIES     CONSOLIDATION
                                              ------------   ------------   -----------   -----------   -----------   ------------
<S>                                           <C>            <C>            <C>           <C>           <C>           <C>         
Cash flow provided by (used in) operating 
      activities                              $ 43,881,627   $ (6,064,996)  $  (522,549)  $ 4,811,497   $ 1,629,527   $ 43,735,106
                                              ------------   ------------   -----------   -----------   -----------   ------------

Cash flows from investing activities
      Exploration, development and leasehold
         costs                                 (28,000,989)    (7,818,560)     (692,005)   (4,665,046)           --    (41,176,600)
      Contributions to subsidiaries             (1,214,554)     2,529,522            --            --    (1,314,968)            --
      Other                                      2,818,211     11,075,372            --      (228,367)           --     13,665,216
                                              ------------   ------------   -----------   -----------   -----------   ------------

          Net cash (used in) provided by 
             investing activities              (26,397,332)     5,786,334      (692,005)   (4,893,413)   (1,314,968)   (27,511,384)
                                              ------------   ------------   -----------   -----------   -----------   ------------

Cash flows from financing activities
      Proceeds from debt                        22,000,000             --            --            --            --     22,000,000
      Repayments of debt                       (43,000,000)            --            --            --            --    (43,000,000)
      Contributions from equity holders                 --             --     1,214,554    (1,124,000)      (90,554)            --
      Other                                     (1,351,324)            --            --       165,792      (224,005)    (1,409,537)
                                              ------------   ------------   -----------   -----------   -----------   ------------

          Net cash (used in) provided by 
             financing activities              (22,351,324)            --     1,214,554      (958,208)     (314,559)   (22,409,537)
                                              ------------   ------------   -----------   -----------   -----------   ------------

Net increase (decrease) in cash and
     cash equivalents                           (4,867,029)      (278,662)           --    (1,040,124)           --     (6,185,815)
Cash and cash equivalents, beginning 
     of the year                                 5,129,513        454,230            --     3,181,013            --      8,764,756
                                              ------------   ------------   -----------   -----------   -----------   ------------

Cash and cash equivalents, end of the
     period                                   $    262,484   $    175,568   $        --   $ 2,140,889   $        --   $  2,578,941
                                              ============   ============   ===========   ===========   ===========   ============
</TABLE>


Certain non cash transactions have taken place between HSR and its subsidiaries
related to the equity contributions. Accordingly, these transactions are not
reflected in the statements of cash flows.





                                      11
<PAGE>   12



Item 2. Management's Discussion and Analysis of Financial Condition and Results
        of Operations

GENERAL Over the past 12 months, the Company has undertaken several strategic
initiatives that have positioned it for a period of significant growth in
reserves, production, cash flow and earnings. In 1995, the Company articulated a
strategy that included (i) consolidating in its core geographic areas,
particularly the Denver-Julesburg Basin ("D-J Basin"), (ii) diversifying its
asset base outside of the D-J Basin, (iii) capturing more of the value stream by
marketing its production and (iv) maximizing its financial flexibility. By
completing the acquisition of all of the D-J Basin properties owned by Basin
Exploration, Inc. (the "Acquisitions") and the merger with Tide West Oil Company
(the "Merger"), by forming two exploration-focused Gulf Coast joint ventures,
SouthTech and Chenier, and by focusing on the gas marketing, transportation and
trading business through the creation of HS Energy Services, Inc., HSR has taken
the fundamental initial steps to implement its strategy.(1) Management's focus
for the foreseeable future will be to continue to execute this strategy with
particular emphasis on activities that maximize the financial returns from HSR's
expanded asset base.

The Company now operates in four significant core areas, the geologic and
geographic diversity of which combine to create an oil and gas company with
attractive, long-lived reserves, balanced with meaningful exposure to
exploration and technologically-driven upside. The Company's strategically
important and profitable presence in the gas marketing, trading and
transportation business, provides the opportunity to increase its operating
margins on production from both the D-J Basin and Mid-Continent areas. The
Company has begun an oil trading and transportation business to be engaged in
the purchase, sale and transport of crude oil.

The United States oil and gas industry is subject to large variations in
profitability due, in part, to fluctuating commodity prices and related changes
in rates of reinvestment by industry participants. Several factors have led to
a positive fundamental outlook for the oil and gas industry and improved
economics for production in the Company's core geographic areas. These include
(i) low gas storage levels combined with relatively high wellhead capacity
utilization, (ii) increasing overall gas demand, (iii) deregulation of
distribution and marketing channels, particularly for D-J Basin and Rocky
Mountain production, and expansion of pipeline capacity to transfer gas to
markets outside the Colorado Front Range and (iv) successful application of
advanced oil and gas exploration, drilling and production technologies.

GAS PRICE CONSIDERATIONS As of June 30, 1997, approximately 76% of the Company's
proved producing reserves consisted of gas. These reserves are located in the
D-J Basin and Mid-Continent areas. The absolute level and volatility of gas
prices have a material impact on the Company.

During 1995 and early 1996, prices for Rocky Mountain gas were substantially
below prices for gas in markets outside the Rocky Mountain region. This
disparity was caused by low demand for Rocky Mountain gas due to an unusually
warm winter season and above-normal availability of hydro-electric power in the
western United States. This condition resulted in excess gas supply in the
Rocky Mountains which led to downward price pressure in the Colorado Front


- --------
(1) The Company has recently taken steps to assume full management of projects
previously jointly managed under the Chenier joint venture.



                                      12
<PAGE>   13



Range market. However, since the beginning of 1996, the market for the Company's
D-J Basin gas had strengthened substantially due to several factors. First, the
excess supply from Wyoming gas producers has declined as a result of increased
demand from West Coast markets. Second, in October 1995 the Colorado Public
Utilities Commission approved tariff changes that effectively eliminated
transportation costs for D-J Basin gas sold to the Colorado Front Range market,
resulting in a transportation cost advantage for D-J Basin producers of
approximately $0.40 per MMBtu. Third, the supply of D-J Basin gas has declined
over the last two years due to the combination of reduced drilling in the D-J
Basin and natural production declines. The average gas price received by the
Company for its D-J Basin production has increased from $1.28 per Mcf in 1995 to
$1.90 per Mcf in 1996 and to $2.08 per Mcf in the six months ended June 30,
1997. In addition, expansion of pipeline capacity has begun, which will begin
service in the fall of 1997, providing additional transportation outlets for
Wyoming producers to markets other than the Colorado Front Range and providing
Colorado Front Range producers access to other markets. The Company believes
that these developments will further reduce the disparity between D-J Basin
pricing and pricing generally available elsewhere in the United States.

The D-J Basin provides a significant portion of the Company's gas production.
Historically, the price of D-J Basin gas (on a Btu-equivalent basis) has been
linked closely to the Colorado Interstate Gas pipeline ("CIG") Rocky Mountain
Index. However, more recently, as a result of the tariff changes and the
seasonal nature of demand in the Colorado Front Range, the price for D-J Basin
gas tends to reflect the CIG Rocky Mountain Index during the low demand summer
months (generally April through October) and to reflect Mid-Continent indices
during the high demand winter periods (generally November through March). KN
Energy has recently announced plans to construct a natural gas pipeline from
Cheyenne, Wyoming to Denver capable of transporting up to 250 million cubic feet
of natural gas per day. The Company does not know how this will affect the gas
market, but does not believe that it will have a material adverse effect on the
price of gas in the Colorado Front Range.

Gas prices in the Mid-Continent are closely tied to established indices which
are influenced by national supply and demand factors. Average gas prices
received by the Company in the Mid-Continent generally fluctuate with changes
in Mid-Continent posted prices, which for the years 1993 through 1996 averaged
$0.25 per Mcf less than the Henry Hub price. The average gas price received
in the Mid-Continent since the Merger in June 1996 through December 31, 1996,
was $2.24 per Mcf, or $0.29 below the Henry Hub price and the average price
during the six months ended June 30, 1997 was $2.29 or $0.22 below the Henry
Hub price (before hedging).

OIL PRICE CONSIDERATIONS Oil prices are established in a highly liquid
international market. Average oil prices received by the Company in the D-J
Basin and Mid-Continent generally fluctuate with changes in the NYMEX West
Texas Intermediate ("NYMEX-WTI") crude oil closing prices. The Company's
average oil price for 1995 was approximately $1.77 per Bbl below NYMEX-WTI
closing prices. The average oil price for 1996 was approximately $0.45 below
NYMEX-WTI closing prices and the average oil price for the six months ended
June 30, 1997 was approximately $0.85 per Bbl below NYMEX-WTI closing prices.
The changes in the relative value of the Company's oil production during these
periods is a result of renegotiation of several oil sales contracts, as well as
the general fluctuation in the market value of the Company's D-J Basin oil
production relative to NYMEX-WTI.




                                      13
<PAGE>   14


RESULTS OF OPERATIONS During 1997 the Company has continued drilling and
development activity in the D-J Basin and exploitation activities in the
Mid-Continent and the Gulf Coast. At June 30, 1997, the Company owned interests
in more than 3,580 producing wells (of which it operated more than 2,680)
compared to 3,590 wells (of which it operated more than 2,640) at June 30,
1996. The Company's results of operations have been significantly affected by
the Acquisitions and the Merger, which occurred in 1996, by its drilling
program and by fluctuations in oil and gas prices.

COMPARISON OF THREE MONTHS AND SIX MONTHS ENDED JUNE 30, 1997 AND 1996

OIL AND GAS REVENUES For the comparative three month periods, oil production
increased from 471 MBbls to 608 MBbls and gas production increased from 7,092
MMcf to 10,060 MMcf, or 29% and 42%, respectively. Average oil prices realized
decreased by 5% from $20.40 to $19.48 per Bbl and average gas prices realized
increased by 10% from $1.65 to $1.81 per Mcf. The production increases were the
result of additional production from the properties acquired in the
Acquisitions and the Merger and new wells drilled by the Company. The net
effect of these changes resulted in an increase in oil and gas revenues from
$21.3 million to $30.1 million or 41%. During the period, the Company also
recognized $1.1 million in other gas revenues from the sale of tax credits 
compared to $630,641 for the comparative prior year period.

For the comparative six month periods, oil production increased from 766 MBbls
to 1,167 MBbls and gas production increased from 12,054 MMcf to 20,031 MMcf, or
52% and 66%, respectively. Average oil prices realized increased by 3% from
$19.78 to $20.37 per Bbl and average gas prices realized increased by 29% from
$1.64 to $2.11 per Mcf. The production increases were the result of additional
production from the properties acquired in the Acquisitions and the Merger and
new wells drilled by the Company. The net effect of these changes resulted in
an increase in oil and gas revenues from $35 million to $66.1 million or 89%.
During the period, the Company also recognized $2.2 million in other gas
revenues from the sale of tax credits compared to $1.1 million for the 
comparative prior year period.

The Company, through its gas marketing division and its wholly owned
subsidiary, HS Energy Services, Inc., actively markets a portion of its own gas
production, markets gas to third parties and supplies gas to end-users. Trading
and transportation net margins were $125,025 and $925,401 for the three months
and six months ended June 30, 1997, respectively.

INTEREST INCOME AND OTHER INCOME Interest and other income increased by
$291,237, or 462% for the three month comparative periods and by $518,711, or
500%, for the six month comparative periods. The increase in interest and other
income was mainly due to short term investing of the Company's available funds,
as well as income recorded on the Company's interest in a limited partnership.

PRODUCTION EXPENSES Lease operating expenses increased by $2,830,224, or 91%,
for the three month comparative periods and by $6,434,113, or 108%, for the six
month comparative periods. On a Boe basis, lease operating expenses increased
from $1.88 to $2.60 for the three month 





                                      14
<PAGE>   15


comparative periods and from $2.14 to $2.75 for the six month comparative
periods. This increase is primarily the result of a different mix of wells in
the current year, including wells with historically higher operating costs
which were acquired as a result of the Acquisitions, and a significant number of
workovers on producing wells. Production taxes increased by $402,653, or 25%,
for the three month comparative periods and by $2,143,919, or 80%, for the six
month comparative periods, due to increased production and prices.

DEPRECIATION, DEPLETION AND AMORTIZATION Depreciation, depletion and
amortization ("DD&A"), a non-cash expense, increased by $3,765,529, or 41%, for
the three month comparative periods and by $10,123,585, or 67%, for the six
month comparative periods, due to an increase in production and an increase in
the depletion rate. On a Boe basis, the Company's weighted average depletion
rate increased from $5.22 for the six months ended June 30, 1996 to $5.41 for
the six months ended June 30, 1997. The Company adjusts its DD&A rate based on
material changes in its reserves and on an annual basis based on year end
engineering.

GENERAL AND ADMINISTRATIVE EXPENSE General and administrative expense reflects
costs incurred net of administrative costs directly attributable to drilling
and well operations, which costs are included in lease operating expenses or
are capitalized. General and administrative expenses increased by $404,882, or
45%, for the three month comparative periods and by $1,269,133, or 72%, for the
six month comparative periods. The increase is primarily attributable to the
Merger and retention of the former Tide West employees. On a Boe basis, general
and administrative expenses increased from $0.54 to $0.57 for the three month
comparative periods and from $0.64 to $0.67 for the six month comparative
periods.

INTEREST EXPENSE Interest expense increased by $2,952,141, or 63%, for the
three month comparative periods and by $7,631,673, or 99%, for the six month
comparative periods, due to increased borrowings on the Company's long-term
bank debt. Also, in November 1996, the Company issued $150 million of its 9
1/4% senior subordinated notes due in 2006.

PROVISION FOR INCOME TAXES The Company follows the provisions of Statement of
Financial Accounting Standards ("SFAS") No. 109. Pursuant to SFAS 109, the
Company has recorded a tax provision based on tax rates in effect during the
period. Accordingly, the Company accrued taxes at the rate of 38.1% in 1997 and
1996. Due to incurrance of a significant amount of intangible drilling costs,
which are deductible for tax purposes, substantially all of the Company's tax
provision in both periods is deferred.

LIQUIDITY AND CAPITAL RESOURCES

Financing Sources

The Company is committed to reducing its ratio of debt to total book
capitalization, and is currently implementing numerous programs to do so. Since
December 31, 1996 the Company has reduced its long-term bank debt from $174
million to $153 million with the proceeds from the sale of non-core,
non-strategic properties and the application of excess working capital. In
addition, as discussed in Note 3, the Company plans to further reduce its
long-term debt by $24.4 million in connection with the sale of the Gothic
properties. The Company believes that it will be able to arrange a favorable
combination of financing alternatives to fund its ongoing capital requirements
and reduce its overall financial leverage. Until this debt ratio is reduced, the
Company currently plans to fund capital expenditures attributable to exploration
and 


                                      15
<PAGE>   16


drilling activities primarily out of its expected cash flow from operations.
The Company has financed, and expects to continue to finance, its acquisition
activities, if any, with (i) cash flow from operations, (ii) borrowings under
the Chase Facility (defined below), (iii) public offerings of equity and debt,
(iv) divestitures (including asset monetizations) of non-core assets and (v)
the TCW Facility (as defined). Borrowings in connection with acquisitions may
have the effect of increasing the Company's leverage.

On June 14, 1996, the Company amended the terms of its senior bank credit
facility with The Chase Manhattan Bank, as agent (the "Chase Facility"), to
increase the maximum credit amount to $350 million. Under the terms of the Chase
Facility, no principal payments are required until June 14, 2001, assuming the
Company maintains a Borrowing Base sufficient to support the outstanding loan
balance. The Borrowing Base is based on the underlying value of the Company's
oil and gas properties.  Upon consummation of the Offering (defined below) and
the application of the estimated net proceeds therefrom, the borrowing base
under the Chase Facility was set at $275 million.  As a result of the sale of
properties to Gothic Energy Corporation, effective August 28, 1997, the
borrowing base will be adjusted to $261 million. The Chase Facility bears
interest at the Base Rate plus 0% to 0.5% or LIBOR plus 0.75% to 1.5%.

In November 1996, the Company issued $150 million of its 9 1/4% senior
subordinated notes due in 2006 (the "Notes"). The offering of the Notes (the
"Offering") was undertaken in order to replace a portion of the Company's
outstanding indebtedness under the Chase Facility with fixed rate term debt. On
April 25, 1997, the Company exchanged $150 million of new notes registered
under the Securities Act of 1933 (the "New Notes"), for the Notes which were
offered in a private offering exempt from securities registration. The material
terms of the New Notes are identical to the Notes.

The Company also continues to maintain its arrangement with a Trust Company of
the West-related entity covering a proposed $90 million non-recourse,
volumetric overriding royalty facility (the "TCW Facility") of which
approximately $80 million is available. The proceeds from the TCW Facility may
be used by the Company at its discretion for a variety of corporate purposes,
including acquisitions of new properties, exploration and development drilling
and monetization of existing corporate properties.

The Company anticipates that its available borrowing capacity under the Chase
Facility, combined with its operating cash flow and the TCW Facility, provide
the Company with the financial resources and flexibility to fund current and
ongoing development activities and to meet other financial obligations. Since
the consummation of the Merger and the Acquisitions, the Company has monetized
approximately $45 million of non-strategic properties (of which $24.4 million
is pending at June 30, 1997 as discussed below), using the proceeds to reduce
outstanding borrowings under the Chase Facility. As further discussed in Note 3
to the unaudited Consolidated Financial Statements, the Company entered into an
agreement to sell certain non-core properties. The Company will receive $24.4
million in cash and title to certain other producing properties near the
Company's existing Arkoma Basin assets. The agreement is expected to close no
later than August 28, 1997. The Company plans to use the proceeds from the sale
to repay bank debt and thus has reclassified such amounts to "current portion of
long-term debt". The subject properties have been classified as "oil and gas
properties held for resale", and appear in "current assets". The nature of the
Company's current development strategies and other


                                      16
<PAGE>   17


activities provide the Company with considerable flexibility in terms of the
timing and magnitude of its capital expenditures. If the Company experiences
unforeseen changes in its working capital position or capital resources,
management may revise the capital expenditure program accordingly or
alternatively may supplement the capital position of the Company through, among
other things, the issuance of additional equity or debt securities or by
entering into joint venture arrangements.

Capital Commitments

For the six months ended June 30, 1997, the Company incurred total exploration,
development and leasehold capital expenditures of $41.2 million. The Company
estimates capital expenditures for 1997 will be between $65-$75 million, which
will be allocated in varying amounts primarily to activities in the Company's
four core geographic areas: the D-J Basin, the Northern Rockies, the Anadarko
and Arkoma Basins of the Mid-Continent and the on-shore Gulf Coast region. The
Company continuously evaluates its inventory of drilling opportunities and
adjusts the amount and allocation of its capital program based on a number of
factors, including seismic results, prospect readiness, product prices, service
company availability and rates, acquisitions and capital position.

A major component of the Company's capital expenditure program includes costs
associated with consolidation activities and development drilling in the D-J
Basin, and, to a lesser extent, the development of its other Rocky Mountain
properties. The Company has incurred approximately $18.4 million in capital
expenditures in the six months ended 1997 for drilling and recompleting wells on
the Company's D-J Basin properties.

The second component of the Company's capital expenditure program is the
continued exploitation of the properties acquired as a result of the Merger
with Tide West. For the six months ended June 30, 1997, the Company has
incurred total acquisition, exploitation and development expenditures in the
Mid-Continent area of $9.5 million. The Company is currently evaluating a
variety of opportunities that include increased exploitation, exploration and
density drilling, recompletions and field extensions.

The final component of the Company's capital expenditure program is to develop
exploitation and exploration prospects in the Gulf Coast. As described below,
the Company has entered into two joint ventures. During the six-month period
ended June 30, 1997, the Company incurred total capital expenditures of $10.4
million in the Gulf Coast. This includes approximatley $5.4 million which the
Company spent under the SouthTech joint venture in the six months ended June 30,
1997, for seismic, leasehold, overhead costs and drilling.

In June 1996, the Company entered into an exploration and development agreement
with Chenier Exploration, Inc. ("CEI"), pursuant to which the Company purchased
from CEI and a third party interests in properties in the Gulf Coast for
approximately $1.9 million, of which $1.2 million was paid in cash and the
remaining portion was funded with a promissory note. Under the terms of the
agreements, CEI was responsible for the generation and development of prospects
in the project areas. On June 24, 1997, the Company gave notice of termination
of this venture, and has since assumed management of the venture projects.
Certain disputes have arisen between the Company and CEI concerning their
respective rights and obligations, but the Company believes




                                      17
<PAGE>   18

these disputes will not interfere with development of the projects. For the six
months ended June 30, 1997, the Company spent $5.0 million for seismic,
leasehold, drilling and overhead costs. See - Part II, Item 1 - Legal
Proceedings and Environmental Issues - Litigation.

In 1994, the Company entered into an exploration agreement with Union Pacific
Resources Company covering drilling locations in the D-J Basin, pursuant to
which the Company committed to spend $9.3 million during the two years ended
June 1996 and meet certain other minimum obligations. In 1996, the Company
elected to extend the agreement and committed to spend approximately $2.4
million by June 1997. All such commitments have been met under these
agreements. The Company has also entered into a number of other standard
industry arrangements that require the drilling of wells or other activities.
The Company believes that it will meet its obligations under these
arrangements, which individually and in the aggregate are not material.

Working Capital and Cash Flow

Net cash provided by operating activities for the six months ended June 30,
1997, was $43.7 million, up from the same period in 1996. This is primarily the
result of (i) additional oil and gas production revenues attributable to the
larger number of producing wells resulting from the Company's drilling
activities and the wells acquired in the Acquisitions and the Merger, and (ii)
higher product prices. Future cash flows will be influenced by, among other
factors, the number of producing wells on line, product prices and production
constraints.

Risk Management. The Company uses financial instruments to reduce its exposure
to market fluctuations in the price and transportation cost of oil and gas. The
Company's general strategy is to hedge price and location risk with swap,
collar, floor and ceiling arrangements. When utilizing such instruments, in
order to minimize basis risk the Company hedges its production back to the
wellhead to the maximum extent possible. In addition to hedging activities, the
Company is engaged in using the financial markets to capture trading margins.
The Company has established policies with respect to open positions which limit
its exposure to market risk and requires reporting to management of the
potential financial exposure on a daily basis resulting from both hedging and
trading activities.

Hedging Activities. Activities for hedging purposes are entered into by the
Company to manage its exposure to price and location risks in the marketing of
its oil and gas production and, in the case of its marketing activities, third
party gas. Gains and losses on hedging positions are recognized in the period
the underlying physical transactions occur in "oil and gas sales" and "trading
and transportation revenues" (for third party gas).

The Company has entered into the following forward sales and swap arrangements
with respect to its gas production for the quarters and in total as indicated 
below. Note that total average daily gas production for the quarter ended 
June 30, 1997 was 110,545 Mcf/day.




                                      18
<PAGE>   19


<TABLE>
<CAPTION>
                                                        AVERAGE DAILY VOLUME (MCFD)
                                          -----------------------------------------------------
Counterparty Pays:                           1.99      $2.21       $1.67      $1.33      $1.71
Company Pays:                                NGPL       PEPL        CIG        CIG      Wng(Tok)
- -----------------------------------------------------------------------------------------------
<S>                                       <C>        <C>        <C>        <C>          <C>    
Period Hedged:
   July 1997                                 10,000         --     20,000      2,065        710
   August 1997                               10,000         --     20,000      2,065        710
   September 1997                            10,000     20,000     20,000      2,133        710
   October 1997                              10,000     20,000     10,000      1,989        722
   November 1997                                 --         --         --      2,056        699
   December 1997                                 --         --         --      1,989        722
   First Quarter 1998                            --         --         --      1,989        711
   Second Quarter 1998                           --         --         --      1,890        692
   Third Quarter 1998                            --         --         --      1,804        674
   Fourth Quarter 1998                           --         --         --      1,696        663

Total Quantity Hedged (Number of          1,230,000  1,220,000  2,150,000  1,050,000    381,000
   Days Times Daily Volume Hedged)
</TABLE>



The Company has hedged approximately 25% of its oil production at $20.59 per
Bbl through April 30, 1998. Additionally, with respect to the hedging of third
party gas, the Company has hedged 1.2 Bcf through January 1998 with offsetting
physical positions at settlement prices which are based upon NYMEX future
prices or other published indices.

Trading Activities. The Company engages in the trading of various energy
related financial instruments which require payments to (or receipt of payments
from) counterparties based on the differential between a fixed and variable
price for the commodity, swap or other contractual arrangement. Activities for
trading purposes are accounted for using the mark-to-market method. Under this
method, changes in the market value of outstanding financial instruments are
recognized as a gain or loss in the period of change on a net basis in "trading
and transportation revenues." The market prices used to value these
transactions reflect management's best estimate considering various factors
including closing exchange and over-the-counter quotations, time value and
volatility factors underlying the commitments. The values are adjusted to
reflect the potential impact of liquidating the Company's position in an
orderly manner over a reasonable period of time under present market
conditions.

Company policy requires that financial instrument purchase and sales contracts
be balanced in terms of contract volumes and the timing of performance and
delivery obligations. As of June 30, 1997, all open positions were balanced
with an offsetting position. Gains of $2,300 were recognized in connection with
these activities for the second quarter of 1997 and $26,349 for the six months
ended June 30, 1997. These gains are included in "trading and transportation
revenues".

Credit Risk. While notional amounts are used to express the volume of various
derivative financial instruments, the amounts potentially subject to credit
risk in the event of nonperformance by the third parties are substantially
smaller. Counterparties to the swap, collar, floor and ceiling arrangements
discussed above are investment grade financial institutions. Accordingly, the
Company does not anticipate any material impact to its financial position or
results of operations as a result of nonperformance by the third parties on
financial instruments related to hedging activities or trading activities.



                                       19
<PAGE>   20


Interest Rate Swaps. During the second quarter of 1995, the Company entered
into an interest rate exchange agreement with a financial institution to hedge
its interest rate on $40 million of the Company's borrowings at 7.76% through
May 2002. Under the terms of the agreement, the difference between the
Company's fixed rate of 7.76% and the three month LIBOR rate plus 1.125% is
received or paid by the Company.

The Company, through the Merger, assumed interest rate exchange agreements with
two financial institutions to hedge its interest rate on a total of $40 million
of the Company's borrowings at rates ranging from 6.16% to 7.32% for 1997
through 1999. Under the terms of these agreements, the difference between the
Company's fixed rate and the three month LIBOR rate is received or paid by the
Company.

Contingencies

In May 1995, the Company was named as a respondent by the United States
Environmental Protection Agency (the "EPA") in an administrative order brought
under the Resource Conservation and Recovery Act ("RCRA") by the EPA against
the owner/operator of an oilfield production water evaporation facility. Based
on its evaluation of the above matters, and after consideration of reserves
established, the Company believes the resolution of such matters will not have
a material adverse effect on the Company's financial position or results of
operations.

DISCLOSURE REGARDING FORWARD-LOOKING STATEMENTS

This 10-Q Report includes statements that are not purely historical and are
"forward-looking statements" within the meaning of Section 27A of the
Securities Act and Section 21E of the Securities Exchange Act of 1934, as
amended (the "Exchange Act"), including statements regarding the Company's
expectations, hopes, beliefs, intentions or strategies regarding the future.
All statements other than statements of historical facts included in this 10-Q
Report, including without limitation, statements under "Legal Proceedings and
Environmental Issues" and "Management's Discussion and Analysis of Financial
Condition and Results of Operations" regarding reserves and their values;
planned capital expenditures; increases in oil and gas production; trends and
expectations concerning oil and gas prices; the Company's financial position,
business strategy and other plans and objectives for future operations,
divestitures and debt repayment; potential liabilities or the expected absence
thereof; and the potential outcome of environmental matters, litigation or other
proceedings are forward-looking statements. All forward-looking statements
included or incorporated by reference in this 10-Q Report are based on
information available to the Company on the date hereof, and the Company
assumes no obligation to update such forward-looking statements. Although the
Company believes that the assumptions and expectations reflected in such
forward-looking statements are reasonable, it can give no assurance that such
expectations will prove to have been correct or that the Company will take any
actions that may presently be planned.

There are numerous uncertainties inherent in estimating quantities of proved
oil and gas reserves and projecting future rates of production and timing of
development expenditures, including many factors beyond the control of the
Company. Many factors may affect the Company's expectations and plans. Capital
expenditure and financing plans may change in connection with the success of
drilling activities, the general availability of capital, interest rates, and
cash flow 


  
                                       20
<PAGE>   21

available from operations. Cash flow available from operations may change
depending on costs of materials and services, regulatory burdens and commodity
prices. Oil and gas prices are volatile, and there are several potentially
significant adverse effects to the Company which can result if product prices
decline materially. First, lower product prices will adversely impact the
Company's cash flow and could cause the Company to (i) curtail its capital
program, (ii) borrow additional amounts under its revolving credit agreement,
and/or (iii) issue additional debt or equity securities. Second, lower product
prices could cause the borrowing base under the Company's bank credit agreement
to be reduced and certain covenant tests to be adversely affected. Third, under
rules promulgated by the Securities and Exchange Commission, companies that
follow the full cost accounting method are required to make quarterly "ceiling
test" calculations. Lower product prices adversely impact the ceiling
calculation. Should the Company realize sustained lower product prices, it
could be required to write down its oil and gas properties, resulting in a
non-cash charge against earnings.

Certain additional important factors that could cause actual results to differ
materially from the Company's forward-looking statements are disclosed under
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" and elsewhere in this 10-Q Report and in the Company's 8-K Report
filed February 26, 1997. All subsequent written or oral forward-looking
statements attributable to the Company or persons acting on its behalf are
expressly qualified in their entirety by the factors mentioned above.

                           PART II. OTHER INFORMATION

Item 1.  Legal Proceedings and Environmental Issues

Litigation. At this time, the Company is involved in no material litigation,
however, the Company is involved in various claims and lawsuits incidental to
its business.

On July 22, 1997, CEI commenced a lawsuit against the Company in the United
States District Court for the Eastern District of Texas (Civil action No 1:97
CV 399). The action follows the Company's notice of termination of the Chenier
joint venture and the Company's assumption of ongoing management of the venture
projects. The suit claims that the Company is obligated to continue paying
certain general and administrative costs to CEI for up to nine months following
termination, and makes other claims. The Company disputes all of CEI's claims,
intends to vigorously defend the suit, and intends to counterclaim against CEI
for damages for breach of contract and other claims. The Company is also
attempting to enforce the agreement between the parties for arbitration of all
disputes. The amounts in dispute under the suit are not material to the
Company.

Environmental Proceedings. The owner of an oil field waste disposal facility, a
major oil company and the Company were named as respondents by the United
States Environmental Protection Agency ("EPA") in an administrative order
brought by the EPA against Weld County Waste Disposal, Inc. ("WCWDI") under
section 7003 of the Resource Conservation and Recovery Act ("RCRA") on May 11,
1995. WCWDI operated and continues to own two evaporation pits in Colorado for
the disposal of non-hazardous production wastes. The EPA order requires that
work be performed to abate a perceived endangerment to wildlife, the
environment or public welfare. The Company and other non-operator respondents
are working 


                                      21
<PAGE>   22

together with the EPA to close the pits and to develop work plans and
characterization studies, and the facility has been permanently closed.

The Company has utilized this facility in past years to dispose of its
production and flowback water. During the period of its use, the Company
believed that the facility was operating in compliance with all applicable
legal requirements and, along with other oil and gas operators, paid a fee to
WCWDI for using this disposal facility. There were a number of other
significant contributors to the facility during the period reviewed by the EPA
(1988 through 1994) and additional contributors during the period from 1977,
when it was constructed, through 1988. The Company and the major oil company
were named because they were deemed the major contributors of waste volumes to
the facility for the period reviewed by the EPA. Certain other contributors are
participating in their share of the reclamation costs.

Based on the Company's current knowledge and its expectation of proportionate
reimbursement from other parties who utilized the facility, the Company does
not believe that its share of the reclamation costs will have a material impact
on its financial condition or results of operations. By agreement with other
contributing parties, the Company is currently paying approximately 50% of the
costs associated with the project, but after recovery from additional liable
parties, the Company's percentage share of overall costs may be reduced to as
low as 40%. The Company has spent approximately $577,000 on its behalf to date
on the project. The Company's share of total costs associated with the project,
at the 50% level of participation, are currently estimated to range from $1 to
$2 million over three years. The Company believes that it has adequately
reserved for the estimated liability.

Item 2.    Changes in Securities   None.

Item 3.    Defaults Upon Senior Securities   None.

Item 4.    Submission of Matters to a Vote of Security Holders The Company
           held its annual meeting of the stockholders on May 22, 1997. In
           addition to the election of directors, the following matter was
           submitted to a vote of the stockholders:

               To approve the HS Resources, Inc. 1997 Performance and Equity
               Incentive Plan. 10,876,621 votes were for, 532,252 votes were
               against, and 89,161 votes abstained. Broker non-voters in the
               amount of 2,936,672 were counted for purposes of obtaining a
               quorum, but were not counted in the vote. The matter was,
               therefore, approved by the Company's stockholders at the
               meeting.

Item 5.    Other Information   None.

Item 6.    Exhibits and Reports on Form 8-K.

               a. List of Exhibits.




                                      22
<PAGE>   23

Exhibit
Number                         Description of Exhibits


3.1        Amended and Restated Certificate of Incorporation of the Company.
           (Incorporated herein by reference to Exhibit 3.1 to the Company's
           Registration Statement on Form S-1, No. 33-52774, filed October 2,
           1992.)

3.2        Third Amended and Restated Bylaws of the Company adopted December
           16, 1996. (Incorporated by reference to Exhibit 3.2 to the Company's
           Registration Statement on Form S-4, No 333-19433, filed January 8,
           1997.)

4.1        Form of Indenture dated December 1, 1993, entered into between the
           Company and the Trustee. (Incorporated by reference to Exhibit 4.7
           to Amendment No. 3 to the Company's Registration Statement on Form
           S-3, No. 33-70354, filed November 23, 1993.)

4.2        Indenture dated November 27, 1996, among the Company, Orion
           Acquisition, Inc., HSRTW, Inc., and Harris Trust and Savings Bank as
           Trustee. (Incorporated by reference to Exhibit 4.2 to the Company's
           Registration Statement on Form S-4, No 333-19433, filed January 8,
           1997.)

4.3        First Supplemental Indenture dated November 25, 1996 among the
           Company, Orion Acquisition, Inc., HSRTW, Inc., and Harris Trust and
           Savings Bank as Trustee. (Incorporated by reference to Exhibit 4.3
           to the Company's Registration Statement on Form S-4, No 333-19433,
           filed January 8, 1997.)

10.1       Amended Note and Warrant Purchase Agreement dated January 15, 1991,
           among NGP, Resolute Resources, Inc., and the Company. (Incorporated
           by reference to Exhibit 4.4.1 to the Company's Quarterly Report on
           Form 10-Q for the quarter ended December 31, 1990, filed February
           14, 1991.)

10.1.1     Amendment No. 1 to Note and Warrant Purchase Agreement dated June
           28, 1991, between the Company and NGP. (Incorporated by reference to
           Exhibit 4.4.2 to the Company's Annual Report on Form 10-K for the
           fiscal year ended June 30, 1991, filed September 30, 1991.)

10.1.2     Second Amendment to Note and Warrant Purchase Agreement dated August
           17, 1992, between the Company and NGP. (Incorporated by reference to
           Exhibit 4.2.2 to Amendment No. 2 to the Company's Registration
           Statement on Form S-1, No. 33-52774, filed November 19, 1992.)

10.1.3     Third Amendment to Note and Warrant Purchase Agreement dated October
           21, 1993, between the Company and NGP. (Incorporated by reference to
           Exhibit 4.1.3 to Amendment No. 2 to the Company's Registration
           Statement on Form S-3, No. 33-70354, filed November 23, 1993.)

10.2       Amended and Restated Warrant Agreement dated January 15, 1991,
           between NGP and the Company. (Incorporated by reference to Exhibit
           4.5.1 to the Company's Quarterly Report on Form 10-Q for the quarter
           ended December 31, 1990, filed February 14, 1991.)



                                      23
<PAGE>   24


10.3       Amended Warrant No. W-1, dated January 15, 1991, and issued by the
           Company to NGP. (Incorporated by reference to Exhibit 4.6.1 to the
           Form 8, Second Amendment to Form 10, filed April 8, 1991.)

10.3.1     Amendment No. 1 to Amended Warrant No. W-1, dated December 30, 1991,
           and issued by the Company to NGP. (Incorporated by reference to
           Exhibit 4.6.2 to the Company's Quarterly Report on Form 10-Q for the
           quarter ended December 31, 1991, filed on February 14, 1991.)

10.4       Form of Warrant No. W-10, dated January 28, 1992, and issued by the
           Company to NGP. (Incorporated by reference to Exhibit 4.16 to
           Amendment No. 1 to the Company's Registration Statement on Form S-1,
           No. 33-52774, filed November 9, 1992.)

10.5       1987 Stock Incentive Plan, as amended December 2, 1996. (Incorporated
           by reference to Exhibit 10.5 to the Company's Quarterly Report on
           Form 10-Q for the quarter ended March 31, 1997, filed May 15, 1997.)

10.6       Common Stock Purchase Warrant dated July 12, 1990 by the Company to
           James E. Duffy. (Incorporated by reference to Exhibit 10.5 to the
           Form 8, Second Amendment to Form 10, filed April 8, 1991.)

10.7       HS Resources, Inc. Rule 701 Compensatory Benefit Plan. (Incorporated
           by reference to Exhibit 10.5.2 to the Form 8, Second Amendment to
           Form 10 filed April 8, 1991.)

10.8       1992 Directors' Stock Option Plan. (Incorporated by reference to
           Exhibit 10.10 to Amendment No. 1 to the Company's Registration
           Statement on Form S-1, No. 33-52774, filed November 9, 1992.)

10.8.1     1993 Directors' Stock Option Plan. (Incorporated by reference to
           Exhibit 10.8.1 to the Company's Annual Report on Form 10-K for the
           fiscal year ended December 31, 1993, filed March 31, 1994 (as amended
           by Form 10-K/A-1 on April 8, 1994.))

10.9       Form of Indemnification Agreement for Directors of the Company.
           (Incorporated by reference to Exhibit 10.16 to the Company's Annual
           Report on Form 10-K for the fiscal year ended December 31, 1995,
           filed March 25, 1996.)

10.10      Lease Agreement dated October 6, 1993, between the Company and JMB
           Group Trust IV and Endowment and Foundation Realty, Ltd. -- JMB III
           for the premises at One Maritime Plaza, San Francisco, California.
           (Incorporated by reference to Exhibit 10.13 to the Company's Annual
           Report on Form 10-K for the fiscal year ended December 31, 1993,
           filed March 31, 1994 (as amended by Form 10-K/A-1 on April 8,
           1994.))

10.11      Lease Agreement dated March 28, 1994, between the Company and 1999
           Broadway Partnership for the premises at 1999 Broadway, Denver,
           Colorado. (Incorporated by reference to Exhibit 10.15 to the
           Company's Quarterly Report on Form 10-Q for the quarter ended June
           30, 1994, filed August 12, 1994.)

10.12      Interest exchange agreement between The Chase Manhattan Bank, N.A.
           and the Company dated May 9, 1995. (Incorporated by reference to
           Exhibit 10.19 to the Company's Quarterly Report on Form 10-Q for the
           quarter ended June 30, 1995, filed August 14, 1995.)

10.13      Amended and Restated Agreement and Plan of Merger, dated as of April
           29, 1996, among the Company, HSR Acquisition, Inc. and Tide West Oil
           Co. (Incorporated by reference as Annex A to Amendment No. 2 to the
           Company's Registration Statement on Form S-4, No. 333-01991, filed
           on May 2, 1996.)



                                      24
<PAGE>   25

10.14      Agreement for Purchase and Sale of Assets, dated as of February 24,
           1996, among the Company, Basin Exploration, Inc. ("Basin") and Orion
           Acquisition, Inc. ("Orion"). (Incorporated by reference to Exhibit
           2.3 to the Company's Form 8-K, filed March 12, 1996.)

10.15      Agreement for Purchase and Sale of Assets [Wattenberg], dated as of
           February 24, 1996, among the Company, Orion and Basin. (Incorporated
           by reference to Exhibit A to the Company's Schedule 13D relating to
           Basin Exploration, Inc. filed on March 6, 1996.)

10.16      Purchase and Sale Agreement, dated December 1, 1995, between the
           Company and Wattenberg Gas Investments, LLC. (Incorporated by
           reference to Exhibit 10.26 to the Company's Annual Report on Form
           10-K for the fiscal year ended December 31, 1995, filed March 25,
           1996.)

10.17      Rights Agreement, dated as of February 28, 1996, between the
           Company and Harris Trust Company of California as Rights Agent.
           (Incorporated by reference to Exhibit 1 to the Company's Form 8-A,
           filed March 11, 1996.)

10.18      Purchase and Sale Agreement dated March 25, 1996 between Orion
           Acquisition, Inc., the Company and Wattenberg Resources Land,
           L.L.C. (Incorporated by reference to Exhibit 10.28 to the Company's
           Quarterly Report on Form 10-Q for the quarter ended March 31, 1996,
           filed May 15, 1996.)

10.19      Credit Agreement, dated as of June 7, 1996, among the Company and
           The Chase Manhattan Bank, N.A. ("Chase"), as agent of the Banks
           signatory thereto. (Incorporated by reference to Exhibit 10.20 to
           the Company's Quarterly Report on Form 10-Q for the quarter ended
           June 30, 1996, filed August 14, 1996.)

10.20      Amended and Restated Credit Agreement dated as of June 14, 1996,
           among the Company, Chase as agent, and the Banks signatory thereto.
           (Incorporated by reference to Exhibit 10.21 to the Company's
           Quarterly Report on Form 10-Q for the quarter ended June 30, 1996,
           filed August 14, 1996.)

10.21      First Amendment to Amended and Restated Credit Agreement dated as
           of June 17, 1996, by and among the Company and Chase in its
           individual capacity and as agent for the Lenders. (Incorporated by
           reference to Exhibit 10.22 to the Company's Quarterly Report on
           Form 10-Q for the quarter ended June 30, 1996, filed August 14,
           1996.)

10.22      Second Amendment to Amended and Restated Credit Agreement dated as
           of November 27, 1996 among the Company and Chase in its individual
           capacity and as agent for the Lenders. (Incorporated by reference
           to Exhibit 10.22 to the Company's Registration Statement on Form
           S-4, No 333-19433, filed January 8, 1997.)

10.23      Assignment of Liens and Amendment of Amended, Restated and
           Consolidated Mortgage, Assignment of Production, Security Agreement
           and Financing Statement, dated June 14, 1996, among Chase
           (Assignor), Chase (Assignee) and the Company. (Incorporated by
           reference to Exhibit 10.23 to the Company's Quarterly Report on
           Form 10-Q for the quarter ended June 30, 1996, filed August 14,
           1996.)

10.24      Guaranty Agreement by HSR Acquisition, Inc. in favor of Chase, as
           Agent, dated June 14, 1996. (Incorporated by reference to Exhibit
           10.24 to the Company's Quarterly Report on Form 10-Q for the quarter
           ended June 30, 1996, filed August 14, 1996.)



                                      25
<PAGE>   26

10.25      Guaranty Agreement by Orion Acquisition, Inc. in favor of Chase, as
           Agent, dated June 14, 1996. (Incorporated by reference to Exhibit
           10.25 to the Company's Quarterly Report on Form 10-Q for the quarter
           ended June 30, 1996, filed August 14, 1996.)

10.26      First Amendment to Guaranty Agreement dated as of June 17, 1996, by
           and among Orion Acquisition, Inc. and Chase, in its individual
           capacity and as agent for the Lenders. (Incorporated by reference to
           Exhibit 10.26 to the Company's Quarterly Report on Form 10-Q for the
           quarter ended June 30, 1996, filed August 14, 1996.)

10.27      First Amendment to Guaranty Agreement dated as of June 17, 1996, by
           and among HSRTW, Inc. (formerly HSR Acquisition, Inc.) and Chase,
           in its individual capacity and as agent for the Lenders.
           (Incorporated by reference to Exhibit 10.27 to the Company's
           Quarterly Report on Form 10-Q for the quarter ended June 30, 1996,
           filed August 14, 1996.)

10.28      Third Amendment and Supplement to Amended, Restated and
           Consolidated Mortgage, Assignment of Production, Security Agreement
           and Financing Statement, dated as of July 15, 1996, by and between
           the Company and Chase. (Incorporated by reference to Exhibit 10.28
           to the Company's Quarterly Report on Form 10-Q for the quarter
           ended June 30, 1996, filed August 14, 1996.)

10.29      Hedging Agreement between Chase and the Company dated May 1, 1996.
           (Incorporated by reference to Exhibit 10.29 to the Company's
           Quarterly Report on Form 10-Q for the quarter ended June 30, 1996,
           filed August 14, 1996.)

10.30      Hedging Agreement between Chase and the Company dated May 1, 1996.
           (Incorporated by reference to Exhibit 10.30 to the Company's
           Quarterly Report on Form 10-Q for the quarter ended June 30, 1996,
           filed August 14, 1996.)

10.31      Hedging Agreement between Chase and the Company dated June 1, 1996.
           (Incorporated by reference to Exhibit 10.31 to the Company's
           Quarterly Report on Form 10-Q for the quarter ended June 30, 1996,
           filed August 14, 1996.)

10.32      Purchase and Sale Agreement between the Company and Wattenberg Gas
           Investments, LLC dated April 25, 1996. (Incorporated by reference to
           Exhibit 10.32 to the Company's Quarterly Report on Form 10-Q for the
           quarter ended June 30, 1996, filed August 14, 1996.)

10.33      Purchase and Sale Agreement between Wattenberg Resources Land L.L.C.
           and Wattenberg Gas Investments, LLC dated May 21, 1996.
           (Incorporated by reference to Exhibit 10.33 to the Company's
           Quarterly Report on Form 10-Q for the quarter ended June 30, 1996,
           filed August 14, 1996.)

10.34      Purchase and Sale Agreement between Orion Acquisition, Inc. and
           Wattenberg Gas Investments, LLC dated June 14, 1996. (Incorporated 
           by reference to Exhibit 10.34 to the Company's Quarterly Report on 
           Form 10-Q for the quarter ended June 30, 1996, filed August 14,
           1996.)

10.35      Purchase and Sale Agreement between Wattenberg Resources Land
           L.L.C. and Wattenberg Gas Investments, LLC dated June 14, 1996.
           (Incorporated by reference to Exhibit 10.35 to the Company's
           Quarterly Report on Form 10-Q for the quarter ended June 30, 1996,
           filed August 14, 1996.)



                                      26
<PAGE>   27

10.36       Purchase and Sale Agreement between Orion Acquisition, Inc. and
            Wattenberg Gas Investments, LLC dated June 14, 1996.
            (Incorporated by reference to Exhibit 10.36 to the Company's
            Quarterly Report on Form 10-Q for the quarter ended June 30,
            1996, filed August 14, 1996.)

10.37       Purchase and Sale Agreement between the Company and Wattenberg Gas
            Investments, LLC dated June 28, 1996. (Incorporated by reference to
            Exhibit 10.37 to the Company's Quarterly Report on Form 10-Q for
            the quarter ended June 30, 1996, filed August 14, 1996.)

10.38       Purchase and Sale Agreement between HSRTW, Inc. and Westtide
            Investments, LLC dated August 9, 1996. (Incorporated by reference
            to Exhibit 10.37 to the Company's Quarterly Report on Form 10-Q for
            the quarter ended September 30, 1996, filed November 7, 1996.)

10.39       Acquisition Agreement between the Company and TCW Portfolio No.
            1555 DR V Sub-Custody Partnership, L.P. dated August 30, 1996.
            (Incorporated by reference to Exhibit 10.38 to the Company's
            Quarterly Report on Form 10-Q for the quarter ended September
            30, 1996, filed November 7, 1996.)

10.40       Purchase Agreement dated November 27, 1996 among the Company, Orion
            Acquisition, Inc., HSRTW, Inc., Salomon Brothers Inc., Chase
            Securities Inc., Lehman Brothers Inc., and Prudential Securities
            Incorporated. (Incorporated by reference to Exhibit 10.40 to the
            Company's Registration Statement on Form S-4, No 333-19433, filed
            January 8, 1997.)

10.41       Registration Agreement dated November 27, 1996 among the
            Company, Orion Acquisition, Inc., HSRTW, Inc. and Salomon
            Brothers Inc. in its individual capacity and as agent for Chase
            Securities Inc., Lehman Brothers Inc., and Prudential Securities
            Incorporated. (Incorporated by reference to Exhibit 10.41 to the
            Company's Registration Statement on Form S-4, No 333-19433,
            filed January 8, 1997.)

10.42       Employment Agreement between James Piccone and the Company dated
            April 21, 1995. (Incorporated by reference to Exhibit 10.42 to
            the Company's Annual Report on Form 10-K for the fiscal year
            ended December 31, 1996, filed March 18, 1997 (as amended by
            Form 10-K/A-1 on March 20, 1997.))

10.43*      Purchase and Sale Agreement dated June 30, 1997 among HSRTW,
            Inc. and Horizon Gas Partners, L.P. as Seller and Gothic Energy
            Corporation as Buyer.

10.44*      Amendment to Purchase and Sale Agreement dated as of July 16, 1997,
            among HSRTW, Inc. and Horizon Gas Partners, L.P. as Seller and
            Gothic Energy Corporation as Buyer.

27*         Financial Data Schedule

- -------------------------

*     Filed herewith

   b. Reports on Form 8-K. None.


                                      27
<PAGE>   28



                                   SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, HS
Resources, Inc. has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.

                                HS RESOURCES, INC.



Dated:   August 14, 1997        By:/s/ JAMES E. DUFFY
                                   ------------------------------------------
                                   James E. Duffy
                                   Vice President and Chief Financial Officer

                                By:/s/ ANNETTE MONTOYA
                                   ------------------------------------------
                                   Annette Montoya
                                   Vice President and Principal Accounting
                                   Officer






                                      28
<PAGE>   29
                               Index to Exhibits


<TABLE>
<CAPTION>

                                                                                          Sequentially
Exhibit                                                                                     Numbered
Number                  Description                                                           Page 
- -------                 -----------                                                       ------------
<S>                     <C>                                                               <C>

10.43*      Purchase and Sale Agreement dated June 30, 1997 among HSRTW,
            Inc. and Horizon Gas Partners, L.P. as Seller and Gothic Energy
            Corporation as Buyer.

10.44*      Amendment to Purchase and Sale Agreement dated as of July 16, 1997,
            among HSRTW, Inc. and Horizon Gas Partners, L.P. as Seller and
            Gothic Energy Corporation as Buyer.

27*         Financial Data Schedule
</TABLE>

<PAGE>   1
                                                                   EXHIBIT 10.43




                          PURCHASE AND SALE AGREEMENT




                                     DATED


                                 JUNE 30, 1997


                                     AMONG



                                  HSRTW, INC.

                                      AND
                           HORIZON GAS PARTNERS, L.P.

                                   AS SELLER


                                      AND
                           GOTHIC ENERGY CORPORATION
                                    AS BUYER
<PAGE>   2





                          PURCHASE AND SALE AGREEMENT

         This Purchase and Sale Agreement ("Agreement"), dated June 30, 1997,
is among HSRTW, INC. ("HSRTW"), a Delaware corporation, with an office address
of 1999 Broadway, Suite 3600, Denver, CO  80202, and HORIZON GAS PARTNERS, L.P.
("Horizon"), a Delaware limited partnership, with an office address of 2512-C
East 71st Street, Tulsa, OK  74136-5575 (collectively "Seller"), and GOTHIC
ENERGY CORPORATION ("Buyer"), an Oklahoma corporation, with an office address
of 5727 South Lewis Avenue, Suite 700, Tulsa, Oklahoma  74105-7148.

         In consideration of the mutual promises contained herein, the benefits
to be derived by each party hereunder and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged,
Seller and Buyer agree as follows:

1PURCHASE AND SALE

         1.1     PURCHASE AND SALE.  Seller agrees to sell and convey and Buyer
                 agrees to pay for and receive the Interests (as defined in
                 Section 1.2), subject to the terms and conditions of this
                 Agreement.

         1.2     INTERESTS.  Subject to the reservations set forth in Section
                 1.3, all of Seller's right, title and interest in and to the
                 following shall herein be called the "Interests:"

                 (a)      The oil and gas wells and locations described in
                          Exhibit "A-1" hereto (collectively the "Wells"),
                          together with all oil, gas and mineral production
                          from the Wells to the extent such production occurs
                          after the Effective Time;

                 (b)      The leasehold estates created by the leases,
                          licenses, permits and other agreements described in
                          Exhibit "A-2," which Exhibit shall be provided by
                          Seller and approved by Buyer by July 15, 1997,
                          INSOFAR AND ONLY INSOFA, as they cover the land (the
                          "Land") described in Exhibit "A-2" (the leasehold
                          estates insofar as they cover the Land are called the
                          "Leases") together with all overriding royalty
                          interests, production payments and other payments out
                          of or measured by the value of oil and gas production
                          from or attributable to the Leases as to periods
                          after the Effective Time insofar as the Leases cover
                          the Lands, unless expressly excluded and reserved by
                          Seller;

                 (c)      All personal property, fixtures and improvements
                          appurtenant to the Wells, or the Leases or used
                          exclusively in connection with the operation of the
                          Wells, or the Leases or with the production,
                          treatment, sale or disposal of hydrocarbons or water
                          produced therefrom or attributable
<PAGE>   3
                          thereto, including without limitation, pipelines,
                          gathering systems and compression facilities
                          appurtenant to or located upon the Leases and cores,
                          cuttings, geophysical and other geological property
                          (to the extent transferable) relating exclusively to
                          the Lands and Wells; excluding, however, tools,
                          pulling machines, vehicles, mobile equipment, rolling
                          stock, tubulars or other drilling or production
                          inventory, or equipment temporarily located on the
                          Lands; and

                 (d)      All rights, privileges, benefits, and appurtenances
                          in any way belonging, incidental to, or appertaining
                          to the property, interests and rights described in
                          Sections 1.2(a) through 1.2(c) to the extent
                          necessary or beneficial to the future operation of
                          such interests, including, to the extent
                          transferable, all agreements, product purchase and
                          sale contracts, surface leases, gas gathering
                          contracts, salt water disposal agreements and wells,
                          processing agreements, compression agreements,
                          equipment leases, permits, gathering lines,
                          rights-of-way, easements, licenses, farmouts and
                          farmins, options, orders, pooling, spacing or
                          consolidation agreements and operating agreements and
                          all other agreements relating thereto;

                 (e)      All lease, land, well, production, engineering,
                          geological, geophysical, litigation, accounting,
                          title, division order and tax files, copies of
                          relevant tax (other than income tax) files, emergency
                          response and environmental compliance plans,
                          abstracts, title opinions, logs, maps and all other
                          books, files, records and data of Seller insofar as
                          they relate exclusively to the Assets described in
                          Exhibit "A," but excluding any records or data that
                          cannot be transferred because of (i) prior legal
                          restrictions, (ii) are proprietary or confidential,
                          or (iii) are subject to attorney/client privilege;

                 (f)      All other right, title or interest of Seller in and
                          to the interests and properties described in Exhibits
                          "A-1" and "A-2" not expressly reserved by Seller.

                 (g)      All benefit or liability associated with gas
                          imbalance attributable to the wells prior to the
                          Effective Time.

         1.3     RESERVED INTERESTS. Seller hereby shall reserve and except
                 from the sale and conveyance of the Interests in favor of
                 Seller, its successors and assigns, the following:

                 (a)      All accounts receivable attributable to the Interests
                          that are, in accordance with generally accepted
                          accounting principles, attributable to the period
                          prior to the Effective Time;

                 (b)      All claims and rights attributable to periods prior
                          to the Effective Time, other than claims relating to
                          underproduction of gas attributable to the Interests
                          as of the Effective Time, including, without
                          limitation, the right





                                       2
<PAGE>   4
                          to initiate, prosecute or participate, at Seller's
                          sole cost and expense, in all audits, audit claims
                          and tax claims or proceedings relating to or
                          including periods prior to the Effective Time,
                          regardless of when commenced, arising out of or under
                          applicable law, operating or product sale agreements
                          or otherwise, and to recover all costs and expenses
                          claimed or shown by such audits or proceedings as
                          owing to the owner of the Interests for periods prior
                          to the Effective Time;

                 (c)      All rights, if any, to recover additional production
                          or proceeds therefrom attributable to the Interests
                          for any production month prior to the Effective Time,
                          resulting from any adjustment to the net revenue
                          interest attributable to the Interests in the
                          applicable division orders; and

                 (d)      All rights of access to and use of the Land,
                          including surface and subsurface rights, in
                          connection with exploration, drilling, development,
                          operations or any other purpose related to any right
                          and/or interest of Seller which has been excepted and
                          reserved hereunder including, without limitation,
                          ingress and egress over the Land for the aforesaid
                          purposes upon properties adjoining the Land.

         1.4     EFFECTIVE TIME.  The purchase and sale of the Interests shall
                 be effective as of July 1, 1997, at 7:00 a.m., at the location
                 of the Interests (the "Effective Time").

2        PURCHASE PRICE

         2.1     PURCHASE PRICE.  The purchase price to be paid by Buyer for
                 the Interests shall be $27,500,000 plus the properties
                 described on Exhibit "G" (the "Purchase Price") (such property
                 described on Exhibit "G" shall be referred to as "Buyer
                 Property"),  subject to adjustment as set forth in Section and
                 payable as follows:

                 (a)      an earnest money deposit of $15,000 payable to Seller
                          plus delivery to HS Resources, Inc. of 1,500,000
                          shares of Buyer's Common Stock pursuant to the terms
                          of a Stock Subscription Agreement entered into
                          concurrently herewith a copy of which is attached as
                          Exhibit "H" and a Registration Rights Agreement
                          entered into concurrently herewith a copy of which is
                          attached hereto as Exhibit "I" (collectively the
                          "Earnest Money"); and

                 (b)      the Purchase Price, payable at Closing.

         2.2     ADJUSTMENTS TO PURCHASE PRICE.

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

                          (i)     the value of all oil in storage above the
                                  pipeline connection, being 16" from the tank
                                  bottoms, or in transit as of the Effective
                                  Time and not previously sold by Seller that
                                  is attributable to the





                                       3
<PAGE>   5
                                  Interests, such value to be the market price
                                  in effect as of the Effective Time or the
                                  price set forth in any applicable purchase
                                  contract, less taxes and gravity adjustments
                                  deducted by the purchaser of such oil;

                          (ii)    the amount of all expenditures; rentals and
                                  other charges; ad valorem, property,
                                  production, excise, severance and similar
                                  taxes based upon or measured by the ownership
                                  of property or the production of hydrocarbons
                                  or the receipt of proceeds therefrom;
                                  expenses billed under applicable operating
                                  agreements and, in the absence of an
                                  operating agreement, expenses of the sort
                                  customarily billed under such agreements,
                                  paid by or on behalf of Seller in connection
                                  with the operation of the Interests, in
                                  accordance with generally accepted accounting
                                  principles, to the extent not provided for in
                                  Section 2.2(a)(iii) below, attributable to
                                  the period after the Effective Time; the
                                  amount of overhead under operating agreements
                                  for operations conducted during the period
                                  from the Effective Time through the Closing
                                  Date.  On wells where Seller is acting as
                                  operator, including salt water disposal
                                  wells, overhead for the period between the
                                  date of this Agreement and the Closing Date
                                  shall be deemed to be $50,000.  It is
                                  expressly agreed that Seller shall retain all
                                  COPAS overhead payments made by third parties
                                  for the period prior to the Effective Time;

                          (iii)   an amount equal to all prepaid expenses
                                  attributable to the Interests that are paid
                                  by or on behalf of Seller that are, in
                                  accordance with generally accepted accounting
                                  principles, attributable to the period after
                                  the Effective Time, including, without
                                  limitation, prepaid utility charges and
                                  prepaid ad valorem, property, production,
                                  severance and similar taxes based upon or
                                  measured by the ownership of property or the
                                  production of hydrocarbons or the receipt of
                                  proceeds therefrom; and

                          (iv)    any other amount agreed upon by Seller and
                                  Buyer.

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

                          (i)     proceeds of production received by Seller
                                  attributable to the Interests that are, in
                                  accordance with generally accepted accounting
                                  principles, attributable to the period of
                                  time from and after the Effective Time;

                          (ii)    an amount equal to unpaid ad valorem,
                                  property, production, severance and similar
                                  taxes and assessments based upon or measured
                                  by the ownership of the production
                                  attributable to the





                                       4
<PAGE>   6
                                  Interests prior to the Effective Time, which
                                  amounts shall, to the extent not actually
                                  assessed, be computed based on such taxes and
                                  assessments for the preceding tax year (such
                                  amount to be prorated for the period of
                                  Seller's and Buyer's ownership before and
                                  after the Effective Time);

                          (iii)   an amount equal to the sum of all Title
                                  Defect and adjustments for Violations of
                                  Environmental Laws, if any, which have been
                                  agreed upon by the parties;

                          (iv)    an amount equal to all cash in, or
                                  attributable to, suspense accounts relative
                                  to the Interests and held by Seller; and

                          (v)     any other amount agreed upon by Seller and
                                  Buyer.

         2.3     ADJUSTMENTS TO PURCHASE PRICE FOR BUYER PROPERTY.  Similar
                 adjustments as set forth in paragraph 2.2 shall be made for
                 the Buyer Property, except that the overhead for operations on
                 the Buyer Property shall be deemed to be $12,000 rather than
                 $50,000.

         2.4     ALLOCATION OF PURCHASE PRICE.  By July 15, 1997, Buyer shall
                 modify Exhibit  "A-1" and submit such modification to Seller
                 for approval in order that Exhibit "A-1" sets forth an
                 allocation of the Purchase Price among Interests and other
                 designated items that comprise the Interests (the "Allocated
                 Value").  Seller shall prepare a similar allocation with
                 respect to the Buyer Property.  The allocations will be
                 provided for the purpose of (a) establishing a basis for
                 certain taxes, (b) obtaining waivers of or making offers with
                 respect to any preferential rights to purchase the Interests,
                 and (c) handling those instances for which the Purchase Price
                 is adjusted as provided herein.  If necessary to determine the
                 Allocated Value of a portion of any Interest for which an
                 Allocated Value is set forth on Exhibit "A-1", such allocation
                 shall be determined on a reasonable engineering basis
                 consistent with the evaluation implicit in the Allocated
                 Values shown on Exhibit "A-1."

3        REPRESENTATIONS AND WARRANTIES

         3.1     REPRESENTATIONS AND WARRANTIES OF SELLER.  Each Seller, as to
                 its portion of the Interests, represents and warrants to Buyer
                 as of the date hereof and as of the Closing Date as follows:

                 (a)      Organization.  HSRTW is a corporation duly organized,
                          validly existing and in good standing under the laws
                          of the state of Delaware, and is duly qualified to
                          carry on its business in each state where its portion
                          of the Interests are located.  Horizon is a limited
                          partnership duly organized, validly existing and in
                          good standing under the laws of the state of





                                       5
<PAGE>   7
                          Delaware and is qualified to carry on its business in
                          each state where its portion of the Interests are
                          located.

                 (b)      Power.  Each Seller has all requisite corporate, or
                          partnership, as appropriate,  power and authority to
                          carry on its business as presently conducted, to
                          enter into this Agreement, and to perform its
                          obligations under this Agreement.  The consummation
                          of the transactions contemplated by this Agreement
                          will not violate, or be in conflict with (i) any
                          provision of HSRTW's Articles of Incorporation or
                          Bylaws or the Limited Partnership Agreement of
                          Horizon, as the case may be, or (ii) any provision of
                          any agreement or instrument to which either Seller is
                          a party or by which either Seller is bound,
                          noncompliance with which would have a material effect
                          upon Buyer's ownership or operation of the Interests,
                          or upon any of the transactions contemplated by this
                          Agreement or, to its knowledge, any judgment, decree,
                          order, statute, rule or regulation applicable to
                          Seller; except that HSRTW is obligated under its
                          senior credit facility to obtain the consent of the
                          majority lenders under that facility (the "Bank
                          Consent") to consummate the transaction contemplated
                          by this Agreement, which consent must be obtained on
                          or before August 1, 1997.

                 (c)      Authorization, Enforceability.  This Agreement has
                          been duly authorized, executed and delivered on
                          behalf of Seller and constitutes the legal, valid and
                          binding obligation of Seller, enforceable in
                          accordance with its terms, subject, however, to the
                          effects of bankruptcy, insolvency, reorganization and
                          other laws for the protection of creditors.

                 (d)      Broker.  Seller has not incurred any liability,
                          contingent or otherwise, for brokers or finders fees
                          relating to the transactions contemplated by this
                          Agreement for which Buyer shall have any
                          responsibility whatsoever.

                 (e)      Bankruptcy.  There are no bankruptcy, reorganization
                          or other arrangement proceedings pending, being
                          contemplated by or, to the knowledge of Seller,
                          threatened against Seller.

                 (f)      Royalties.  To the actual knowledge of Seller, all
                          royalties, rentals, and other payments due and
                          payable by Seller under all Leases comprising the
                          Interests for the period Seller has owned such
                          Interests ("Seller's Ownership Period") have been
                          properly and timely paid to the extent that the
                          failure to so pay would cause a material adverse
                          effect on the Interests.

                 (g)      Third-Party Waivers.  To the actual knowledge of
                          Seller, all requisite third-party consents to assign
                          and preferential rights of purchase affecting the
                          Interests will be listed on Exhibits "B" and "C"
                          respectively, such Exhibits to be completed by Seller
                          on or before July 15, 1997.





                                       6
<PAGE>   8
                 (h)      Litigation, Proceedings and Claims.  There are no
                          actions, suits or arbitration proceedings to which
                          Seller is a party pending or, to Seller's actual
                          knowledge, threatened in writing, before any court or
                          governmental agency that would result in material
                          impairment or loss of Seller's title to the Interests
                          or would otherwise materially adversely affect the
                          Interests.

                 (i)      Mortgages and Other Instruments.  Assuming the timely
                          receipt of the Bank Consent, neither the performance
                          of this Agreement, nor the consummation of the
                          transactions contemplated by this Agreement, will
                          cause a breach of any of the terms and conditions, or
                          will result in the creation or imposition of any lien
                          upon any of the Interests, or the production of oil,
                          gas or other minerals from the Interests pursuant to
                          the terms of any agreement or other instrument to
                          which Seller is a party or by which it is bound.

                 (j)      Sales Contracts.  Exhibit "D" will list all material
                          contracts or agreements to which Seller is a party
                          for the sale of oil or gas from the Interests which
                          are not terminable upon 90 days' or less notice, such
                          Exhibit to be completed by Seller on or before July
                          15, 1997.

                 (k)      Contracts and Agreements.  Except as will be set
                          forth on Exhibit "E" (the "Disclosure Schedule") or
                          otherwise identified pursuant to this Agreement,
                          there are no contracts or agreements to which Seller
                          is a party which are unusually burdensome and
                          non-standard and which materially and adversely
                          affect the value of the Interests, such Exhibit to be
                          completed by Seller on or before July 15, 1997.

                 (l)      Prepayment or Related Arrangements.  Seller has not
                          entered into any arrangement under which Buyer will
                          be obligated, by virtue of a prepayment arrangement,
                          a "take or pay" arrangement, a production payment, or
                          any other arrangement other than gas balancing
                          agreements or arrangements, to deliver hydrocarbons
                          from the Interests at some future time without then
                          or thereafter receiving full payment therefore, or to
                          make payment at some future time for hydrocarbons
                          already produced and sold from the Interests.

                 (m)      Tax Partnership.  To Seller's actual knowledge except
                          as may be disclosed in the Disclosure Schedule, no
                          portion of the Interest, are subject to any form of
                          agreement (whether formal or informal, written or
                          oral) deemed by any state or federal tax statute,
                          rule or regulation to be or to have created a tax
                          partnership.

         3.2     REPRESENTATIONS AND WARRANTIES OF BUYER.  Buyer represents and
                 warrants to Seller as of the date hereof and as of the Closing
                 Date as follows:





                                       7
<PAGE>   9
                 (a)      Organization.  Buyer is a corporation duly organized,
                          validly existing and in good standing under the laws
                          of the state of Oklahoma and it is duly qualified to
                          carry on its business in each state where the
                          Interests are located.

                 (b)      Power.  Buyer has all requisite corporate power and
                          authority to carry on its business as presently
                          conducted, to enter into this Agreement, to purchase
                          the Interests on the terms described in this
                          Agreement and to perform its other obligations under
                          this Agreement.  The consummation of the transactions
                          contemplated by this Agreement will not violate, or
                          be in conflict with (i) any provision of its Articles
                          of Incorporation or Bylaws; or (ii) any provision of
                          any agreement or instrument to which it is a party or
                          by which it is bound, noncompliance with which would
                          have a material effect upon any of the transactions
                          contemplated by this Agreement or Buyer's ability to
                          adhere to and/or perform any obligation hereunder or
                          in connection herewith, or, to its knowledge, any
                          judgment, decree, order, statute, rule or regulation
                          applicable to Buyer.

                 (c)      Authorization, Enforceability.  This Agreement has
                          been duly authorized, executed and delivered on
                          behalf of Buyer and constitutes the legal, valid and
                          binding obligation of Buyer, enforceable in
                          accordance with its terms, subject, however, to the
                          effects of bankruptcy, insolvency, reorganization and
                          other laws for the protection of creditors.

                 (d)      Broker.  Buyer has incurred no liability, contingent
                          or otherwise, for brokers or finders fees relating to
                          the transactions contemplated by this Agreement for
                          which Seller shall have any responsibility
                          whatsoever.

                 (e)      Investment Purpose.  The Interests to be acquired by
                          Buyer pursuant to this Agreement are being acquired
                          by it for its own account for investment purposes and
                          not for distribution within the meaning of any
                          securities law.  In acquiring the Interests, it is
                          acting in the conduct of its own business and not
                          under any specific contractual commitment to any
                          third party, or any specific nominee agreement with
                          any third party, to transfer to, or to hold title on
                          behalf of, such third party, with respect to all or
                          any part of the Interests.

                 (f)      Bankruptcy.  There are no bankruptcy, reorganization
                          or arrangement proceedings pending, being
                          contemplated by or, to the knowledge of Buyer,
                          threatened against Buyer.

                 (g)      Buyer Knowledge.  Buyer is experienced and
                          knowledgeable in the oil and gas business and is
                          aware of its risks.  Buyer has been afforded the
                          opportunity to examine materials made available to it
                          by Seller in the Offering Memorandum (and associated
                          data delivered to Buyer, including mechanical data)
                          and in the data room in Seller's offices in Tulsa,





                                       8
<PAGE>   10
                          Oklahoma with respect to the Interests (collectively
                          the "Background Materials").  The Background
                          Materials are files, or copies thereof, that Seller
                          has used in its normal course of business and other
                          information about the Interests that Seller has
                          compiled or generated.  Buyer acknowledges and agrees
                          that Seller has made no representations or
                          warranties, express or implied, written or oral, as
                          to the accuracy or completeness of the Background
                          Materials or any other information relating to the
                          Interests furnished by or on behalf of Seller or to
                          be furnished to Buyer or its representatives.  In
                          entering into this Agreement, Buyer acknowledges and
                          affirms that it has relied and will rely solely 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 its own estimate and
                          appraisal of the extent and value of the petroleum,
                          natural gas and other reserves of the Interests.
                          Buyer's representatives have visited Seller's office
                          and have been given opportunities to examine the
                          books and records Seller has made available relating
                          to the Interests.  Neither Seller nor its affiliates,
                          agents, representatives or employees shall have any
                          liability to Buyer or its affiliates, agents,
                          representatives or employees resulting from any use,
                          authorized or unauthorized, of the Background
                          Materials or other information relating to the
                          Interests provided by or on behalf of Seller or its
                          agents, representatives or employees.

4        COVENANTS AND AGREEMENTS

         4.1     COVENANTS AND AGREEMENTS OF SELLER.  Seller covenants and
                 agrees with Buyer as follows:

                 (a)      Upon execution of this Agreement, Seller will make
                          available to Buyer for examination at a location
                          designated by Seller, unless legally prohibited from
                          doing so or unless certain documents are subject to
                          attorney/client privilege, such title information,
                          production information and other information relating
                          to the Interests in Seller's possession, including
                          without limitation, accounting files, production
                          files, land files, lease files, well files, division
                          order files, contract files and marketing files.
                          Subject to the consent and cooperation of operators
                          and other third parties, Seller will cooperate with
                          Buyer in Buyer's efforts to obtain, at Buyer's sole
                          expense, such additional information relating to the
                          Interests as Buyer may reasonably desire, to the
                          extent in each case that Seller may do so without
                          violating legal constraints or any obligation of
                          confidence or unless certain documents are subject to
                          attorney/client privilege.

                 (b)      During the period beginning on the date of this
                          Agreement and concluding on the Closing Date, Seller
                          shall, unless specifically waived by Buyer in
                          writing:





                                       9
<PAGE>   11
                          (i)     subject to the provisions of applicable
                                  operating and other agreements, Seller shall
                                  continue to operate and administer the
                                  Interests in a good and workmanlike manner
                                  consistent with its past practices, and shall
                                  carry on its business with respect to the
                                  Interests in substantially the same manner as
                                  before execution of this Agreement;

                          (ii)    Seller shall, except for emergency action
                                  taken in the face of risk to life, property
                                  or the environment, submit to Buyer for prior
                                  written approval, all requests for operating
                                  or capital expenditures and all proposed
                                  contracts and agreements relating to the
                                  Interests that involve individual commitments
                                  of more than $50,000 net to Seller's
                                  interest;

                          (iii)   Buyer acknowledges that Seller owns an
                                  undivided interest in certain of the
                                  Interests, and Buyer agrees that the acts or
                                  omissions of the other working interest
                                  owners who are not affiliated with Seller
                                  shall not constitute a violation of the
                                  provisions of this Agreement, nor shall any
                                  action required by a vote of working interest
                                  owners constitute such a violation so long as
                                  Seller has voted its interest in a manner
                                  that complies with the provisions of this
                                  Agreement; and

                          (iv)    notwithstanding anything to the contrary in
                                  this Agreement, Seller shall have no
                                  liability to Buyer for the incorrect payment
                                  of delay rentals, royalties, shut-in
                                  royalties or similar payments or for any
                                  failure to make any such payments through
                                  mistake or oversight unless caused by
                                  Seller's gross negligence or willful
                                  misconduct.

         4.2     COVENANTS AND AGREEMENTS OF BUYER.  Buyer covenants and agrees
                 with Seller that:

                 (a)      Buyer shall for the period between the date of this
                          Agreement and Closing  maintain its corporate status
                          and assure that, as of the Closing Date, it will not
                          be under any material corporate, legal or contractual
                          restriction that would prohibit or delay the timely
                          consummation of the transaction contemplated
                          hereunder.

                 (b)      With respect to Wells operated by Seller included in
                          the  Interests assigned to Buyer at Closing, Buyer
                          shall, subject to the applicable terms of existing
                          operating agreements, take over operations as of 7:00
                          a.m. local time at the wellsite on the day after
                          Closing. Upon taking over operations, Buyer shall
                          post all necessary state, federal and local bonds and
                          shall assist Seller in having Seller's existing bonds
                          released, or in the alternative, having the Wells
                          operated by Buyer released from Seller's existing
                          bond.  Seller shall cooperate (without any obligation
                          to spend funds doing so)





                                       10
<PAGE>   12
                          with Buyer in Buyer's effort to be elected or
                          appointed operator of any Well for which Seller
                          currently acts as operator. To the extent that Seller
                          is unable to have its resignation as operator of any
                          of the Interests  become effective as of Closing,
                          Buyer's operations of such Interests shall be
                          considered contract operations on behalf of Seller.
                          Buyer shall defend, indemnify, save and hold harmless
                          Seller, its affiliates, and its and their, officers,
                          directors, employees, and agents against all losses,
                          damages, claims, demands, costs, expenses,
                          liabilities, and sanctions of each and every
                          character, including without limitation, reasonable
                          attorneys' fees, court costs, and costs of
                          investigation or arbitration, that arise from or in
                          connection with Buyer's operation of such Interests
                          from and after the Closing.

5        TITLE MATTERS

         5.1     DEFENSIBLE TITLE.

                 (a)      The term "Defensible Title" shall mean such title,
                          whether held by Seller or by a third party for the
                          benefit of Seller, that, except for and subject to
                          the Permitted Encumbrances (as defined in Section
                          5.1(b) below):

                          (i)     entitles Seller to receive as to each Well
                                  set forth in Exhibit "A-1,"  as to the Proved
                                  Producing ("PDP"), Proved Developed
                                  Non-Producing ("PDNP") or Proved Undeveloped
                                  ("PUD") formations set forth on Exhibit "A-1"
                                  not less than the "Net Revenue Interest" set
                                  forth in such Exhibit for such wells and
                                  formations;

                          (ii)    obligates Seller to bear costs and expenses
                                  relating to the maintenance, development and
                                  operation of each Well set forth on Exhibit
                                  "A-1", as to the PDP, PDNP, and PUD
                                  formations set forth on Exhibit "A-1," in an
                                  amount not greater than the "Working
                                  Interest" set forth in such Exhibit for such
                                  Wells and  formations without a proportionate
                                  increase in the Net Revenue Interest; and

                          (iii)   is free and clear of material liens,
                                  encumbrances and defects.

                 (b)      In the case of federal, Indian, or state leases,
                          Seller's title may be in the nature of either record
                          title or federal lease operating rights.

                 (c)      The term "Permitted Encumbrances," as used herein,
                          shall mean, as follows:

                          (i)     lessors' royalties, overriding royalties,
                                  unitization and pooling designations and
                                  agreements, reversionary interests and
                                  similar burdens to the extent such matters do
                                  not operate to reduce the "Net Revenue
                                  Interest" of a Well as to the PDP, PDNP and
                                  PUD





                                       11
<PAGE>   13
                                  formations set forth on Exhibit "A-1" below
                                  the net revenue interest set forth in Exhibit
                                  "A-1" with respect to such wells and
                                  formations;

                          (ii)    required third-party consents to assignments
                                  and similar agreements with respect to which
                                  (A) waivers or consents are obtained from the
                                  appropriate parties, or (B) the appropriate
                                  time period for asserting such rights has
                                  expired without an exercise of such rights,
                                  and all preferential rights to purchase;

                          (iii)   all rights to consent by, required notices
                                  to, filings with, or other actions by
                                  governmental entities in connection with the
                                  sale or conveyance of oil and gas leases or
                                  interests therein if the same are customarily
                                  obtained subsequent to such sale or
                                  conveyance;

                          (iv)    easements, rights-of-way, servitudes,
                                  permits, surface leases and other rights with
                                  respect to surface operations, pipelines,
                                  grazing, logging, canals, ditches, reservoirs
                                  or the like and easements for streets,
                                  alleys, highways, pipelines, telephone lines,
                                  power lines, railways and other easements and
                                  rights-of-way, on, over or in respect of any
                                  of the Interests;

                          (v)     materialmen's, mechanics', repairmen's,
                                  employees', contractors', operators', tax and
                                  other similar liens or charges arising in the
                                  ordinary course of business incidental to
                                  construction, maintenance or operation of any
                                  of the Interests (A) if they have not been
                                  filed pursuant to law, (B) if filed, they
                                  have not yet become due and payable or
                                  payment is being withheld as provided by law,
                                  or (C) if their validity is being contested
                                  in good faith in the ordinary course of
                                  business by appropriate action; and

                          (vi)    any other liens, charges, encumbrances,
                                  contracts, agreements, instruments,
                                  obligations, defects or irregularities of any
                                  kind whatsoever affecting the Interests that
                                  individually or in the aggregate are not such
                                  so as to have a material effect upon and/or
                                  do not prevent Seller from receiving the
                                  proceeds of production, and that do not
                                  operate to (A) reduce the Net Revenue
                                  Interest of Seller in a Well, as to the PDP,
                                  PDNP and PUD formations set forth on Exhibit
                                  "A-1" below the net revenue interest of
                                  Seller set forth on Exhibit "A-1" with
                                  respect to such wells and formations or (B)
                                  increase the Working Interest of Seller in
                                  such Wells and formations  above that set
                                  forth on Exhibit "A-1" without a
                                  proportionate increase in the Net Revenue
                                  Interest of Seller.

                          (vii)   such Title Defects that Buyer has waived;





                                       12
<PAGE>   14
                          (viii)  rights of reassignment, to the extent any
                                  exist as of the date of this Agreement, upon
                                  the surrender or expiration of any lease;

                          (ix)    the terms and conditions of all division
                                  orders, pooling or unitization orders,
                                  agreements or declarations;

                          (x)     rights reserved to or vested in any
                                  governmental authority to control or regulate
                                  any of the Interests in any manner; and all
                                  applicable laws, rules, regulations and
                                  orders of general applicability in the area;

                          (xi)    liens arising under operating agreements,
                                  unitization and pooling agreements and
                                  production sales contracts securing amounts
                                  not yet due or, if due, being contested in
                                  good faith in the ordinary course of
                                  business;

                          (xii)   all other liens, charges, encumbrances,
                                  contracts, agreements, instruments,
                                  obligations, defects and irregularities
                                  affecting the Interests that will not
                                  materially interfere with or detract from the
                                  ownership, operation, value or use of the
                                  Interests; such defects include, without
                                  limitation

                                  (1)      as to producing Leases, those which
                                           have not prevented the receipt of
                                           production proceeds by Seller or its
                                           predecessors in title without
                                           suspense by a production purchaser
                                           and as to which no challenge to
                                           title has been raised on the basis
                                           of such defect, so long as it can
                                           reasonably be concluded either that
                                           such challenge is unlikely or that
                                           such challenge would be unsuccessful
                                           by reason of statutes of limitation,
                                           waiver, estoppel or other defenses,
                                           or

                                  (2)      those described by an attorney's
                                           title opinion as advisory or
                                           waivable as a matter of business
                                           judgment, or

                                  (3)      those in the nature of customary
                                           defects expected to be encountered
                                           in the area involved and customarily
                                           acceptable to Buyer or other prudent
                                           operators and interest owners in the
                                           area, including, without limitation,
                                           defects that have been cured by
                                           possession under applicable statutes
                                           of limitation, defects in the early
                                           chain of title such as failure to
                                           recite marital status in documents,
                                           omission of heirship or succession
                                           proceedings, lack of survey and
                                           failure to record releases of liens,
                                           production payments or mortgages
                                           that have expired of their own terms
                                           or which through the passage of time
                                           or statute are no longer enforceable
                                           or other defects that either as a
                                           practical matter





                                       13
<PAGE>   15
                                           have not resulted or are not likely 
                                           to result in claims that will
                                           materially adversely affect Buyer's
                                           title or are considered waivable
                                           under local bar association-approved
                                           title standards or customary title
                                           practices in the area;

                          (xiii)  liens, if any, to be released at Closing in a
                                  form reasonably acceptable to Buyer.

                 (d)      The term "Title Defect" as used herein shall mean any
                          material encumbrance or defect in Seller's title to a
                          Well (expressly excluding Permitted Encumbrances),
                          that renders Seller's title to such Well less than
                          Defensible Title.

         5.2     TITLE DEFECT ADJUSTMENTS.

                 (a)      No adjustment to the Purchase Price for Title Defects
                          shall be made unless and until, and only to the
                          extent that, the value of Title Defects exceeds
                          $10,000 per Well and the aggregate value of all Title
                          Defects to the extent exceeding the foregoing
                          deductible exceeds a threshold of $200,000, except
                          that the foregoing deductible amount shall not apply
                          to any Title Defect that consists of a certain and
                          indisputable lesser net revenue interest than is
                          shown on Exhibit "A-1" (including, but not limited
                          to, clerical errors in the preparation of Exhibit
                          "A-1"), and with respect to which Title Defect either
                          (i) the proceeds of production are not being received
                          by Seller for its account or (ii) if proceeds are
                          being received by Seller for its account
                          notwithstanding the Title Defect, continuation of the
                          receipt of proceeds of production by Seller would be
                          unlawful.

                 (b)      Buyer shall give Seller written notice of Title
                          Defects immediately upon discovering such defects,
                          but in no event after August 1, 1997.  Such notice
                          shall include:

                          (i)     a description of the Title Defect with
                                  supporting documentation;

                          (ii)    the Allocated Value of the Well affected by
                                  the Title Defect; and

                          (iii)   the amount by which Buyer believes the
                                  Allocated Value of such Well has been reduced
                                  because of such Title Defect.

                 (c)      Buyer shall be conclusively deemed to have waived all
                          Title Defects of which Seller has not been given
                          timely notice by Buyer.

                 (d)      Subject to the limitation contained in Section 5.2(a)
                          and offsets for Interest Additions as provided in
                          Section 5.5, a Well affected by a Title Defect and
                          the Leases comprising the production unit or
                          proration unit for the Well shall be excluded from
                          the Interests to be purchased by Buyer hereunder





                                       14
<PAGE>   16
                          and the Final Purchase Price shall be reduced and
                          settled in accordance with Sections 2.2(b)iii and
                          10.1(a) by an amount equal to the Allocated Value of
                          such Well unless on or prior to the Closing Date:

                          (i)     the Title Defect has been removed or cured;

                          (ii)    Buyer agrees to waive the relevant Title
                                  Defect and purchase the affected Interests
                                  notwithstanding the defect;

                          (iii)   Seller agrees to indemnify Buyer, to the
                                  extent of the Allocated Value of the affected
                                  Well, against all losses, costs, expenses and
                                  liabilities with respect to such Title Defect
                                  claim asserted in writing by a third party
                                  within two years from the Closing Date (in
                                  which case Buyer shall use, reasonable
                                  diligence and care not to disclose
                                  information or take any action that could
                                  increase the likelihood that a claim
                                  regarding the potential defect would be
                                  asserted); or

                          (iv)    Buyer and Seller agree to an amount by which
                                  the Allocated Value of the Well has been
                                  reduced and the Purchase Price is reduced by
                                  such amount in accordance with Section 2.2.

         5.3     PREFERENTIAL RIGHTS AND CONSENTS.

                 (a)      Some of the Leases may be subject to preferential
                          rights to purchase in favor of third parties or third
                          party consents to assignment and notices of sale.
                          The form and content of all solicitations for the
                          waivers and consents affecting the Interests shall be
                          determined and prepared by Seller, but shall not be
                          inconsist with the terms of this Agreement.

                 (b)      In the event a third party exercises an applicable
                          preferential right to purchase an Interest prior to
                          the Closing Date, the affected Interest shall not be
                          treated as a Title Defect, but shall be removed from
                          this Agreement and the Purchase Price shall be
                          adjusted by the Allocated Value of that Interest.  If
                          any preferential right to purchase an Interest is
                          exercised after the Closing Date, such affected
                          Interest shall not be treated as a Title Defect, and
                          no adjustment shall be made on account of such
                          exercise.  All Interests that are subject to
                          preferential rights to purchase that have not been
                          exercised as of the Closing Date shall be conveyed to
                          (and paid for by) Buyer at the Closing.  If any such
                          preferential right is exercised after Closing, Buyer
                          shall convey such affected Interest to the party
                          exercising such right on the same terms and
                          conditions under which Seller conveyed such Interest
                          to Buyer.  Buyer shall retain all amounts paid by the
                          party exercising such preferential right to purchase.
                          In the event of such exercise, Buyer shall prepare a
                          form of conveyance of such interests from Buyer to
                          such exercising party, such conveyance to be in form
                          and





                                       15
<PAGE>   17
                          substance as provided in this Agreement, except that
                          such conveyance shall be made free and clear of all
                          liens, encumbrances, royalty interests, production
                          payments and other charges or defects created by,
                          through or under Buyer.

         5.4     CASUALTY LOSS.  If subsequent to the date of this Agreement,
                 but prior to the Closing, all or any material portion of an
                 Interest to be conveyed to Buyer at Closing is destroyed by
                 fire or other casualty, is taken in condemnation or under the
                 right of eminent domain or proceedings for such purposes are
                 pending or threatened, Buyer shall purchase such Interest
                 notwithstanding any such destruction, taking or pending or
                 threatened taking and the Purchase Price shall not be
                 adjusted.  Seller shall, at the Closing, pay to Buyer all sums
                 paid to Seller by third parties by reason of the destruction
                 or taking of such Interest to be assigned to Buyer, and shall
                 assign, transfer and set over unto Buyer all of the right,
                 title and interest of Seller in and to any unpaid awards or
                 other payments from third parties arising out of the
                 destruction, taking or pending or threatened taking as to such
                 Interests to be conveyed to Buyer.  Seller shall not
                 voluntarily compromise, settle or adjust any material amounts
                 payable by reason of any material destruction, taking or
                 pending or threatened taking as to the Interests to be
                 conveyed to Buyer without first obtaining the written consent
                 of Buyer.  Buyer shall maintain in effect insurance covering
                 the Assets of the general types and limits of coverage as
                 Seller presently has in effect, such types and limits of
                 coverage having been previously disclosed to Buyer.

         5.5     INTEREST ADDITIONS. If prior to Closing an inaccuracy in
                 Exhibits "A-1" or "A-2" is discovered that results in an
                 increase in value of any portion of the Leases or Wells, such
                 as a net revenue interest that is stated to be lower than
                 Seller's actual net revenue interest, the amount of the
                 increased value (a "Credit Adjustment") shall be credited
                 against any potential reduction in the Purchase Price or
                 Seller's indemnification obligations under any provision of
                 this Agreement.

         5.6     TITLE MATTERS FOR BUYER PROPERTY.  Similar provisions to those
                 set forth in paragraphs 5.1, 5.2, 5.3, 5.4 and 5.5 shall apply
                 to Seller for its purchase of the Buyer Property, except that
                 the deductible and the threshold set forth in 5.2(a) shall be
                 changed to $1,000 and $10,000 respectively.

6        ENVIRONMENTAL MATTERS

         6.1     INSPECTION.  Prior to the Closing Date, and subject to any
                 necessary third-party operator approval, Seller shall permit
                 Buyer and its representatives at reasonable times and at their
                 sole risk, cost and expense, to conduct reasonable inspections
                 of the Leases.  Buyer shall not conduct any soil or water
                 tests on the Lands or relating to the Interests without the
                 express written consent of Seller.  Buyer shall repair any
                 damage to the Leases resulting from such inspections and Buyer
                 shall indemnify and hold harmless Seller and its partners,
                 subsidiaries and affiliates and





                                       16
<PAGE>   18
                 its and their respective officers, directors, employees and
                 agents from and against any and all losses or causes of action
                 arising from Buyer's and/or its representatives' inspection of
                 the Leases, including, without limitation, claims for personal
                 injuries or death of employees of the Buyer, its contractors,
                 agents, consultants and representatives, and property damages,
                 or employees of Seller, its contractors, agents, consultants
                 and representatives or third parties.

         6.2     VIOLATION OF ENVIRONMENTAL LAWS.  Buyer shall notify Seller in
                 writing on or before October 30, 1997, of any environmental
                 matters disclosed by its inspection that Buyer reasonably
                 believes in good faith constitutes a Violation of
                 Environmental Laws (as hereinafter defined) including with
                 such notice, a detailed description of the specific matter
                 that is an alleged Violation of Environmental Laws.  For
                 purposes of this Agreement, the term "Environmental Laws"
                 shall mean all federal, state or local laws, statutes,
                 ordinances, rules and regulations of any governmental
                 authority pertaining to protection of the environment in
                 effect as of the Effective Time and as interpreted by court
                 decisions or administrative orders as of the Effective Time in
                 the jurisdiction in which such Interest is located and as
                 enforced by the applicable authorities.  For purposes of this
                 Agreement, the term "Violation of Environmental Laws" shall
                 mean the material violation of or failure to meet specific
                 objective requirements or standards regarding the physical
                 condition of the Wells and well sites (as opposed to reports,
                 plans or other matters that may be required by Environmental
                 Laws) that are clearly applicable to such Interests under
                 applicable Environmental Laws where such requirements or
                 standards are in effect as of the Effective Time, and the term
                 does not include good or desirable operating practices or
                 standards that may be employed or adopted by other oil or gas
                 well operators or recommended by a governmental authority.
                 Seller has heretofore provided to Buyer copies of two
                 environmental reports prepared for Buyer's predecessor in
                 connection with the predecessor's acquisition of certain of
                 the Interests (the "Environmental Reports").  All matters
                 referred to in the Environmental Reports are hereby expressly
                 agreed not to constitute Violations of Environmental Laws
                 under this Agreement.

         6.3     REMEDIES FOR VIOLATION OF ENVIRONMENTAL LAW.  On or before
                 December 30, 1997, with respect to each Violation of
                 Environmental Laws:

                 (a)      Seller and Buyer may agree on an adjustment to the
                          Purchase Price which adjustment shall reflect the
                          cost to remedy such Violation of Environmental Law;

                 (b)      At the election of Seller, Seller may agree to
                          remediate the condition at Seller's cost;

                 (c)      Seller and Buyer may agree that Seller will indemnify
                          Buyer against all losses, costs, expenses, and
                          liabilities with respect to such Violation of
                          Environmental Laws asserted in writing by a third
                          party within two years from the Closing Date (in
                          which case Buyer shall use reasonable diligence and
                          care not to disclose information or take any action
                          that could increase





                                       17
<PAGE>   19
                          the likelihood that a claim regarding the potential
                          violation would be asserted); or

                 (d)      Seller and Buyer may agree to remove that portion of
                          the Interests from the Interests being conveyed
                          hereunder and adjust the Purchase Price accordingly
                          based on the Allocated Value of the Well(s)
                          associated with such Interests.

                 If the parties cannot agree on a course of action under (a) or
                 (c), and Seller does not elect to remediate under (b), the
                 option set forth in subsection 6.3(d) above shall apply. No
                 remedy for a Violation of Environmental Law shall be
                 applicable unless and then only to the extent that (i) each
                 such Violation of Environmental Law exceeds $10,000 and (ii)
                 the aggregate value of all Violations of Environmental Laws to
                 the extent exceeding the foregoing deductible exceeds
                 $150,000.  If after Closing an adjustment to the Purchase
                 Price is made under 6.3(a) Seller shall within 10 days of
                 agreement regarding such adjustment make the agreed payment to
                 Buyer.  If  an Interest or portion thereof is removed from the
                 Interests being conveyed hereunder pursuant to 6.3(d), Buyer
                 and Seller shall within 10 days of agreement regarding such
                 removal prepare the appropriate assignments and make the
                 appropriate payments or accounting adjustments to each other,
                 including adjustments for revenues and costs for a Well if
                 necessary, such that Seller and Buyer are returned to the
                 position existing prior to this Agreement as if the removed
                 Interest had not been initially covered by this Agreement.

                 6.4      ENVIRONMENTAL MATTERS REGARDING BUYER PROPERTY.
                 Similar provisions as those set forth in paragraphs 6.1, 6.2
                 and 6.3 shall apply to Seller regarding the purchase of the
                 Buyer Property, except that the deductibles set forth at the
                 end of paragraph 6.3 shall be changed to $1,000 and $15,000
                 respectively.

7        ANTITRUST

         7.1     If the Hart-Scott-Rodino Antitrust Improvements Act of 1976
                 (the "HSR Act") is applicable to this transaction, both
                 parties shall promptly file with the Federal Trade Commission
                 and the Department of Justice the required notifications,
                 reports and supplemental information to comply in all respects
                 with the requirements of the Act.  All filing fees required of
                 "Acquiring Persons" as determined by the Act shall be paid by
                 Buyer.

8        CONDITIONS TO CLOSING

         8.1     SELLER'S CONDITIONS.  The obligations of Seller at the Closing
                 are subject to the satisfaction at or prior to the Closing of
                 the following conditions:

                 (a)      All representations and warranties of Buyer contained
                          in this Agreement shall be true in all material
                          respects at and as of the Closing as if such
                          representations and warranties were made at and as of
                          the Closing Date, and Buyer shall have performed and
                          satisfied in all material respects all





                                       18
<PAGE>   20
                          agreements required by this Agreement to be performed
                          and satisfied by Buyer at or prior to the Closing.

                 (b)      No order shall have 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 which remains in
                          effect at the time of such Closing.

                 (c)      The Closing shall be permitted to occur without
                          violation of the HSR Act and the rules and
                          regulations of the Federal Trade Commission and the
                          Department of Justice thereunder.

         8.2     BUYER'S CONDITIONS.  The obligations of Buyer at the Closing
                 are subject to the satisfaction at or prior to the Closing of
                 the following conditions:

                 (a)      All representations and warranties of Seller
                          contained in this Agreement shall be true in all
                          material respects at and as of the Closing Date as if
                          such representations and warranties were made at and
                          as of the Closing, and Seller shall have performed
                          and satisfied in all material respects all agreements
                          required by this Agreement to be performed and
                          satisfied by Seller at or prior to the Closing.

                 (b)      No order shall have 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 which remains in
                          effect at the time of such Closing.

                 (c)      The Closing shall be permitted to occur without
                          violation of the HSR Act and the rules and
                          regulations of the Federal Trade Commission and the
                          Department of Justice thereunder.

9        CLOSING.

         9.1     DATE OF CLOSING.  Unless the parties agree otherwise in
                 writing and subject to the conditions stated in this
                 Agreement, the consummation of the transactions contemplated
                 hereby (the "Closing") shall be held on August 28, 1997.  The
                 date the Closing actually occurs is called the "Closing Date."

         9.2     PLACE OF CLOSING.  The Closing shall be held at the offices of
                 Seller in Denver, Colorado.

         9.3     CLOSING OBLIGATIONS.  At the Closing, the following events
                 shall occur, each being a condition precedent to the others
                 and each being deemed to have occurred simultaneously with the
                 others:





                                       19
<PAGE>   21
                 (a)      Seller and Buyer shall execute, acknowledge and
                          deliver an Assignment, Bill of Sale and Conveyance
                          (in sufficient counterparts to facilitate recording)
                          in substantially the form of Exhibit "F" attached
                          hereto, conveying to Buyer the Interests without
                          warranty of title except with respect to defects
                          created by, through or under Seller. As required,
                          assignment forms for federal, Indian, or state leases
                          shall be prepared by Seller and executed.  Buyer
                          shall execute, acknowledge and deliver to Seller an
                          Assignment, Bill of Sale and Conveyance (in
                          sufficient counterparts to facilitate recording) in
                          substantially the form of Exhibit "F" attached hereto
                          conveying to Seller the Buyer Property without
                          warranty of title except with respect to defects
                          created by, through  or under Seller.

                 (b)      Seller and Buyer shall execute and deliver a
                          settlement statement, prepared by Seller in
                          accordance with this Agreement and generally accepted
                          accounting principles (the "Preliminary Settlement
                          Statement") that shall set forth the Preliminary
                          Purchase Price and each adjustment and the
                          calculation of such adjustments used to determine
                          such amount.  Seller shall provide Buyer with a draft
                          of the Preliminary Settlement Statement three days
                          prior to Closing for Buyer's review and approval.
                          The term "Preliminary Purchase Price" shall mean the
                          Purchase Price, adjusted as provided in Section 2.2,
                          using for such adjustments the best information then
                          available.  The Preliminary Settlement Statement
                          shall also include similar adjustments regarding the
                          Buyer Property.

                 (c)      Buyer shall deliver to Seller the Preliminary
                          Purchase Price in immediately available federal funds
                          by wire transfer to the account designated by Seller.

                 (d)      Seller and Buyer shall execute, acknowledge and
                          deliver Transfer Orders or Letters in Lieu thereof,
                          directing all purchasers of production to make
                          payment to Buyer of proceeds attributable to
                          production after the Effective Time from the
                          Interests assigned to Buyer.

                 (e)      Seller shall prepare such notices to third-party
                          operators of the change in ownership of the Interests
                          from Seller to Buyer and such notices of change in
                          operatorship for those Wells operated by Seller for
                          which Buyer has taken over operations as are
                          reasonable and customary in the industry.

                 (f)      Seller and Buyer shall execute, acknowledge and
                          deliver such other instruments and take such other
                          action as may be necessary to carry out their
                          respective obligations under this Agreement,
                          including such transfer orders, notices and other
                          instruments relating to the Buyer Property.





                                       20
<PAGE>   22
10       OBLIGATIONS AFTER CLOSING

         10.1    POST-CLOSING ADJUSTMENT PROCEDURE.

                 (a)      As soon as practicable after the Closing Date, but no
                          later than 90 days after the Closing Date, Seller
                          shall prepare and deliver to Buyer, in accordance
                          with this Agreement and generally accepted accounting
                          principles, a statement (the "Final Settlement
                          Statement") setting forth each adjustment or payment
                          that was not finally determined as of the Closing
                          Date and showing the calculation of such adjustments.
                          Within 15 days after receipt of the Final Settlement
                          Statement, Buyer shall deliver to Seller a written
                          report containing any changes that Buyer proposes be
                          made to the Final Settlement Statement.  The parties
                          shall undertake to agree with respect to the amounts
                          due pursuant to such post-closing adjustment no later
                          than 15 days after Seller has received Buyer's
                          proposed changes.  The date upon which such agreement
                          is reached or upon which the "Final Purchase Price"
                          is established, shall be called the "Final Settlement
                          Date."  If, the Final Purchase Price is more than the
                          Preliminary Purchase Price, Buyer shall pay in
                          immediately available federal funds the amount of
                          such difference to Seller or to Seller's account (as
                          designated by Seller).  If the Final Purchase Price
                          is less than the Preliminary Purchase Price, Seller
                          shall pay in immediately available federal funds the
                          amount of such difference to Buyer or to Buyer's
                          account (as designated by Buyer).  Payment by Buyer
                          or Seller shall be made within five days after the
                          Final Settlement Date.  The Final Settlement
                          Statement shall also include the appropriate
                          adjustments for the Buyer Property.

         10.2    FILES AND RECORDS.  Within 30 days after the Closing Date,
                 Seller shall make available to Buyer originals of all of
                 Seller's files and records relating to the Interests and Buyer
                 shall make available to Seller originals of all of Buyer's
                 files and records relating to the Buyer Property, but
                 excluding any records or data that cannot be transferred
                 because of (i) prior legal restrictions, (ii) are proprietary
                 or confidential, or (iii) are subject to attorney/client
                 privilege.  Buyer shall retain and make available to Seller
                 for seven full calendar years following the year in which
                 Closing occurs, in Buyer's main corporate office during normal
                 business hours, files and records relating to the Interests.
                 Buyer shall include this retention obligation in any
                 subsequent transfer of an Interest by Buyer.

         10.3    FURTHER ASSURANCE.  After Closing, Seller and Buyer shall
                 execute, acknowledge and deliver or cause to be executed,
                 acknowledged and delivered such instruments, and shall take
                 such other actions as may be necessary or advisable to carry
                 out their obligations under this Agreement and under any
                 document, certificate or other instrument delivered pursuant
                 hereto and to fully implement the intent of this Agreement.





                                       21
<PAGE>   23
         10.4    LIMITATIONS.  NOTWITHSTANDING ANYTHING TO THE CONTRARY,
                 ARTICLE 6 SHALL BE THE SOLE AND EXCLUSIVE REMEDY THAT BUYER
                 SHALL HAVE AGAINST SELLER WITH RESPECT TO ANY MATTER OR
                 CIRCUMSTANCES RELATING TO ENVIRONMENTAL LAWS, THE RELEASE OF
                 MATERIALS INTO THE ENVIRONMENT, OR PROTECTION OF THE
                 ENVIRONMENT OR HEALTH.  BUYER HEREBY RELEASES AND DISCHARGES
                 ANY AND ALL CLAIMS AT LAW OR IN EQUITY, KNOWN OR UNKNOWN,
                 WHETHER NOW EXISTING OR ARISING IN THE FUTURE, CONTINGENT OR
                 OTHERWISE, AGAINST SELLER WITH RESPECT TO ANY MATTER OR
                 CIRCUMSTANCE RELATING TO ENVIRONMENTAL LAWS, THE RELEASE OF
                 MATERIALS INTO THE ENVIRONMENT OR PROTECTION OF THE
                 ENVIRONMENT OR HEALTH.  BUYER ACKNOWLEDGES THAT SELLER HAS NOT
                 MADE AND WILL NOT MAKE AND EXPRESSLY DISCLAIMS ANY
                 REPRESENTATION OR WARRANTY REGARDING ANY MATTER OR
                 CIRCUMSTANCE RELATING TO ENVIRONMENTAL LAWS, THE RELEASE OF
                 MATERIALS INTO THE ENVIRONMENT OR PROTECTION OF THE
                 ENVIRONMENT OR HEALTH.  BUYER HEREBY AGREES TO ASSUME THE RISK
                 THAT THE INTERESTS MAY CONTAIN WASTE MATERIALS, INCLUDING
                 NATURALLY OCCURRING RADIOACTIVE MATERIALS, OR HAZARDOUS
                 SUBSTANCES; THAT ADVERSE PHYSICAL CONDITIONS, INCLUDING
                 SUBSURFACE CONDITIONS MAY EXIST; AND UNKNOWN ABANDONED OIL AND
                 GAS WELLS, WATER WELLS, SUMPS AND PIPELINES MAY BE PRESENT,
                 ALL OF WHICH MAY NOT HAVE BEEN REVEALED BY BUYER'S
                 INVESTIGATION.

         10.5    ASSUMPTION OF OBLIGATIONS.

                 (a)      ASSIGNMENT OF THE INTERESTS TO BUYER SHALL CONSTITUTE
                          AN EXPRESS ASSUMPTION BY BUYER OF, AND BUYER
                          EXPRESSLYAGREES TO PAY, PERFORM, FULFILL AND
                          DISCHARGE, ALL CLAIMS, COSTS, EXPENSES, LIABILITIES
                          AND OBLIGATIONSACCRUING OR RELATING TO THE OWNING,
                          DEVELOPING, EXPLORING, OPERATING AND MAINTAINING OF
                          THE INTERESTSCONVEYED TO BUYER AT THE CLOSING,
                          INCLUDING WITHOUT LIMITATION, ALL VIOLATIONS OF
                          ENVIRONMENTAL LAW AND ALL OBLIGATIONS ARISING UNDER
                          OPERATING AGREEMENTS, PRODUCT SALES AGREEMENTS AND
                          OTHER AGREEMENTS COVERING OR RELATING TO THE
                          INTERESTS, REGARDLESS OF THE NEGLIGENCE OF SELLER OR
                          ITS PREDECESSORS, AND REGARDLESS OF WHEN THE EVENTS
                          OCCURRED GIVING RISE TO SUCH MATTERS

                 (b)      BUYER ACKNOWLEDGES THAT SELLER HAS NOT MADE, AND
                          SELLER HEREBY EXPRESSLY DISCLAIMS AND NEGATES, ANY
                          REPRESENTATIONOR WARRANTY, EXPRESS OR IMPLIED,
                          RELATING TO THE CONDITION OF ANY REAL OR IMMOVABLE
                          PROPERTY, PERSONAL OR MOVABLE PROPERTY, EQUIPMENT,
                          INVENTORY, MACHINERY AND FIXTURES CONSTITUTING PART
                          OF THE ASSETS INCLUDING, WITHOUT LIMITATION, (i) ANY
                          IMPLIED OR EXPRESS WARRANTY OF MERCHANTABILITY, (ii)
                          ANY IMPLIEDOR EXPRESS WARRANTY OF FITNESS FOR A
                          PARTICULAR PURPOSE, (iii) ANY IMPLIED OR EXPRESS
                          WARRANTY OF CONFORMITY TO MODELS OR SAMPLES OF
                          MATERIALS, (iv) ANY RIGHTS OF BUYER UNDER APPROPRIATE





                                       22
<PAGE>   24
                          STATUTES TO CLAIM DIMINUTION OF CONSIDERATION OR
                          RETURN OF THE PURCHASE PRICE, (v) ANY IMPLIED OR
                          EXPRESS WARRANTY OF FREEDOM FROM REEHIBITORY VICES OR
                          DEFECTS OR OTHER VICES OR DEFECTS, WHETHER KNOWN OR
                          UNKNOWN, (vi)ANY IMPLIED OR EXPRESS WARRANTY OF
                          FREEDOM FROM PATENT OR TRADEMARK INFRINGEMENT, (vii)
                          ANY IMPLIED OR EXPRESSWARRANTY REGARDING
                          ENVIRONMENTAL LAWS, THE RELEASE OF MATERIALS INTO THE
                          ENVIRONMENT INCLUDING NATURALLYOCCURRING RADIOACTIVE
                          MATERIAL, OR PROTECTION OF THE ENVIRONMENT OR HEALTH,
                          IT BEING THE EXPRESS INTENTIONOF BUYER AND SELLER
                          THAT THE REAL OR IMMOVABLE PROPERTY, PERSONAL OR
                          MOVABLE PROPERTY, EQUIPMENT, INVENTOR, MACHINERY AND
                          FIXTURES SHALL BE CONVEYED TO BUYER AS IS AND IN
                          THEIR PRESENT CONDITION AND STATE OFREPAIR.  BUYER
                          REPRESENTS TO SELLER THAT BUYER HAS MADE OR CAUSED TO
                          BE MADE SUCH INSPECTIONS WITH RESPECTTO THE REAL OR
                          IMMOVABLE PROPERTY, PERSONAL OR MOVABLE PROPERTY,
                          EQUIPMENT, INVENTORY, MACHINERY AND FIXTURES AS BUYER
                          DEEMS APPROPRIATE AND BUYER WILL ACCEPT THE REAL OR
                          IMMOVABLE PROPERTY, PERSONAL OR MOVABLEPROPERTY,
                          EQUIPMENT, INVENTORY, MACHINERY AND FIXTURES AS IS,
                          WHERE IS, IN THEIR PRESENT CONDITION AND STATE OF
                          REPAIR.

                 (c)      SELLER HEREBY EXPRESSLY NEGATES AND DISCLAIMS, AND
                          BUYER HEREBY WAIVES AND ACKNOWLEDGES THAT SELLER HAS
                          NOT MAD, ANY REPRESENTATION OR WARRANTY, EXPRESS OR
                          IMPLIED, RELATING TO (i) THE ACCURACY, COMPLETENESS
                          OR MATERIALITYOF ANY INFORMATION, DATA OR OTHER
                          MATERIALS (WRITTEN OR ORAL) FURNISHED TO BUYER BY OR
                          ON BEHALF OF SELLER; (ii) PRODUCTION RATES,
                          RECOMPLETION OPPORTUNITIES, DECLINE RATES, GEOLOGICAL
                          OR GEOPHYSICALDATA OR INTERPRETATIONS, THE QUALITY,
                          QUANTITY, RECOVERABILITY OR COST OF RECOVERY OF ANY
                          HYDROCARBONRESERVES, ANY PRODUCT PRICING ASSUMPTIONS,
                          OR THE ABILITY TO SELL OR MARKET ANY HYDROCARBONS
                          AFTER CLOSING, OR (iii) ANY OTHER MATTER EXCEPT AS
                          EXPRESSLY SET FORTH IN THIS AGREEMENT.

                 (d)      THE PARTIES AGREE THAT, TO THE EXTENT REQUIRED BY
                          APPLICABLE LAW TO BE OPERATIVE, THE DISCLAIMERS OF
                          WARRANTIES CONTAINED IN THIS SECTION ARE
                          "CONSPICUOUS" DISCLAIMERS FOR THE PURPOSES OF ANY
                          APPLICABLE LAW, RULEOR ORDER.  Notwithstanding
                          anything in this Agreement to the contrary, the
                          Interests are being sold by Seller to Buyer without
                          recourse, covenant or warranty of any kind,
                          expressed, implied or statutory except as
                          specifically set forth in the documents of conveyance
                          described in Section 9.3.

                 (e)      Buyer shall assume all obligations with respect to
                          all "suspense accounts" and the beneficial owners
                          thereof, regardless of when such obligations





                                       23
<PAGE>   25
                          arose.  Buyer shall indemnify, defend, and hold
                          harmless Seller from the claims of any party arising
                          because of the non-payment or mispayment of such
                          suspense accounts.  Seller shall provide without
                          warranty or representation its records regarding
                          payee's names, addresses and applicable amounts.

         10.6    INDEMNIFICATION.  From and after the Closing Date, Buyer and
                 Seller shall indemnify the other as follows:

                 (a)      Seller shall defend, indemnify and save and hold
                          harmless Buyer, its officers, directors, employees
                          and agents, against all losses, damages, claims,
                          demands, suits, costs, expenses, liabilities and
                          sanctions of every kind and character, including,
                          without limitation, reasonable attorneys' fees, court
                          costs and costs of investigation or arbitration, that
                          arise from or in connection with any breach by Seller
                          of this Agreement.

                 (b)      Buyer shall defend, indemnify and save and hold
                          harmless Seller, its affiliates, and its and their,
                          officers, directors, employees, and agents, against
                          all losses, damages, claims, demands, suits, costs,
                          expenses, liabilities and sanctions of every kind and
                          character, including, without limitation, reasonable
                          attorneys' fees, court costs and costs of
                          investigation or arbitration, arise from or in
                          connection with (i) any of the claims, costs,
                          expenses, liabilities and obligations assumed by
                          Buyer pursuant to Section 10.5, and/or (ii) any
                          breach by Buyer of this Agreement.

                 (c)      Seller, on the one hand, and Buyer, on the other,
                          shall indemnify and hold each other harmless from any
                          claim or demand for commission or other compensation
                          by any broker, finder, agent, or similar intermediary
                          claiming to have been employed by or on behalf of
                          Seller or Buyer, as the case may be, and shall bear
                          the cost of legal fees and expenses incurred in
                          defending against any such claim.

                 (d)      As may otherwise be set forth in this Agreement.

         10.7    RECORDING.  Buyer shall immediately after Closing send for
                 filing and recording with all appropriate governmental
                 entities the necessary originals and counterparts of the
                 assignments required in Section 9.3(a).  Buyer shall promptly
                 provide Seller copies of the recorded assignment(s) upon
                 receipt by Buyer. Buyer shall be responsible for all filings
                 with state, Indian and federal agencies for change of
                 operator, and shall promptly provide Buyer with the approved
                 copies of all such filings.

11       TERMINATION OF AGREEMENT

         11.1    TERMINATION.  This Agreement and the transactions contemplated
                 herein may be terminated in the following instances:





                                       24
<PAGE>   26
                 (a)      By Seller, if any of the conditions set forth in
                          Section 8.1 are not completely satisfied in all
                          material respects or waived by Seller as of the
                          Closing Date;

                 (b)      By Buyer, if any of the conditions set forth in
                          Section 8.2 are not satisfied in all material
                          respects or waived by Buyer as of the Closing Date;
                          and

                 (c)      At any time by the mutual written agreement of Buyer
                          and Seller.

         11.2    LIABILITIES UPON TERMINATION OR BREACH.

                 (a)      In the event of the termination of this Agreement by
                          Seller in accordance with subsection 11.1(a), Seller
                          shall have no liability hereunder of any nature
                          whatsoever to Buyer, including any liability for
                          damages.  If Buyer terminates this Agreement in
                          accordance with subsection 11.1(b) above, it shall
                          have no liability hereunder of any nature whatsoever
                          to the Seller including any liability for damages and
                          Seller shall return to Buyer the Buyer Common Stock
                          delivered as part of the Earnest Money pursuant to
                          Exhibits "H" and "I" attached hereto.  If Buyer
                          terminates or fails to perform this Agreement other
                          than in accordance with subsection 11.1(b), or, if
                          Seller terminates this Agreement in accordance with
                          subsection 11.1(a), Seller shall retain the Earnest
                          Money and Buyer shall have no further liability
                          hereunder of any nature whatsoever to the Seller
                          including any liability for damages.

                 (b)      Except as provided above in this subsection 11.2,
                          nothing contained herein shall be construed to limit
                          Seller's or Buyer's legal or equitable remedies in
                          the event of breach of this Agreement.

12       MISCELLANEOUS

         12.1    EXHIBITS.  The Exhibits referred to in this Agreement are
                 hereby incorporated by reference into and constitute a part of
                 this Agreement.

         12.2    RECORDING AND FILING FEES.  Buyer shall pay all documentary,
                 filing, and recording fees required in connection with the
                 filing and recording of the Assignment required in Section
                 9.3(a), and all other filings required or requested under this
                 Agreement, including change of operator forms and other forms
                 filed with governmental agencies.  Except as otherwise
                 specifically provided for in this Agreement, all fees, costs
                 and expenses incurred by Buyer or Seller 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, legal, accounting and
                 consulting fees, costs and expenses.

         12.3    SALES TAXES.  At the Closing, Buyer and Seller may agree on an
                 amount representing state and local sales or use taxes,
                 attributable to the transactions





                                       25
<PAGE>   27
                 contemplated herein, and applicable to that portion of the
                 Interests which is tangible personal property and Buyer shall
                 pay such amount to Seller at Closing.  Seller shall remit any
                 such amounts received at Closing from Buyer in this regard to
                 the appropriate taxing authority in accordance with applicable
                 law.  Buyer shall defend, indemnify, save and hold harmless
                 Seller, its affiliates, and its and their, officers,
                 directors, employees, and agents against all losses, damages,
                 claims, demands, costs, expenses, liabilities, and sanctions
                 of each and every character, including without limitation,
                 reasonable attorneys' fees, court costs, and costs of
                 investigation or arbitration, that arise from or in connection
                 with any sales or use tax assessed against Seller by any
                 taxing authority for any sales or use of taxes assessed
                 against Seller by any taxing authority relating to the
                 Interests sold that is in addition to the amounts paid to
                 Seller at Closing.  Seller shall be responsible for any
                 penalties, interest and attorney's fees relating to the amount
                 paid by Buyer to Seller at Closing if Seller does not timely
                 remit such amount to the appropriate taxing authority.  Should
                 this purchase and sale constitute an isolated or occasional
                 sale and not be subject to sales or use tax with any of the
                 taxing authorities having any jurisdiction over the
                 transaction, no sales or tax will be collected by Seller from
                 Buyer at Closing.  Seller shall cooperate with Buyer in
                 demonstrating that the requirements for an isolated or
                 occasional sale or any other sales tax exemption have been
                 met.

         12.4    NOTICES.  All notices and communications required or
                 transmitted under this Agreement shall be in writing and any
                 communication or delivery hereunder shall be deemed to have
                 been duly made when personally delivered to the individual
                 indicated below, or if mailed, when received by the party
                 charged with such notice and addressed as follows:

                          IF TO SELLER:            HSRTW, INC.
                                  c/o HS Resources, Inc.
                                  1999 Broadway, Suite 3600
                                  Denver, CO  80202
                                  Attention:       George H. Solich
                                  Vice President, Acquisitions & Divestitures

                          WITH A COPY TO:
                                  General Counsel
                                  1999 Broadway, Suite 3600
                                  Denver, CO  80202





                                       26
<PAGE>   28
                          IF TO BUYER:     GOTHIC ENERGY CORPORATION
                                  Suite 700
                                  5727 South Lewis Avenue
                                  Tulsa, OK  74105-7148
                                  Attention:       Michael Paulk
                                                   President

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

         12.5    AMENDMENTS.  This Agreement may not be amended nor any rights
                 hereunder waived, except by an instrument in writing signed by
                 both parties.

         12.6    ASSIGNMENT.  Neither party may assign all or any portion of
                 its rights or delegate all or any portion of its duties
                 hereunder unless it continues to remain liable for the
                 performance of its obligations hereunder and obtains the prior
                 written consent of the other party, which consent shall not be
                 unreasonably withheld.  For any assignment of any right or
                 obligation hereunder to be enforceable, the assignee thereof
                 shall first have agreed to fully assume such right or
                 obligation in writing, and such writing shall expressly set
                 forth that said assignment is subject to the terms and
                 conditions of this Agreement.  Any attempted assignment, which
                 fails to fully comply with the express terms of this
                 subsection 12.6 shall be void ab initio.

         12.7    ANNOUNCEMENTS.  Seller and Buyer shall consult with each other
                 with regard to all press releases and other announcements
                 issued after the date of this Agreement and prior to the
                 Closing Date concerning this Agreement or the transactions
                 contemplated hereby and, except as may be required by
                 applicable laws, rules and regulations of any governmental
                 agency or stock exchange, neither Buyer nor Seller shall issue
                 any such press release or other publicity without the prior
                 written consent of the other party, which consent shall not be
                 unreasonably withheld.

         12.8    COUNTERPARTS.  This Agreement may be executed by Buyer and
                 Seller in any number of counterparts, each of which shall be
                 deemed an original instrument, but all of which together shall
                 constitute but one and the same instrument.

         12.9    GOVERNING LAW.  This Agreement and the transactions
                 contemplated hereby shall be construed in accordance with, and
                 governed by, the laws of the state of Colorado.

         12.10   ENTIRE AGREEMENT.  This Agreement (including the Exhibits
                 hereto) constitutes the entire understanding among the parties
                 with respect to the subject matter hereof, superseding all
                 negotiations, prior discussions and prior agreements,
                 excluding the Confidentiality Agreement dated January 13,
                 1997, which shall terminate at and as of the Closing.





                                       27
<PAGE>   29
         12.11   PARTIES IN INTEREST.  This Agreement shall be binding upon,
                 and shall inure to the benefit of, the parties hereto, and
                 their respective successors and permitted assigns, and nothing
                 contained in this Agreement, express or implied, is intended
                 to confer upon any other person or entity any benefits, rights
                 or remedies.

         12.12   SURVIVAL.  The representations of Seller set forth in
                 paragraph 3.1 and covenants of Seller set forth in paragraph
                 4.1 shall not survive Closing.  Otherwise the representations,
                 warranties, covenants, agreements and indemnities provided for
                 in this Agreement shall survive Closing in accordance with
                 their terms.  No waiver, release, or forbearance of the
                 application of a provision of this Agreement in any given
                 circumstance shall operate as a waiver, release, or
                 forbearance as to any other circumstance.  If the Closing
                 occurs, all Conditions to Closing shall be deemed to have been
                 satisfied or waived, and, after Closing, neither party shall
                 have any liability whatsoever to the other arising out of,
                 resulting from or attributable to any such Conditions to
                 Closing, regardless of whether such Conditions to Closing
                 were, in fact, satisfied or waived.

         12.13   ARBITRATION.

                 (a)      All disputes arising out of or in connection with
                          this Agreement, or any determination required to be
                          made by Buyer or Seller as to which the parties
                          disagree,  shall be settled by arbitration in Denver,
                          Colorado.  The arbitration shall be conducted in
                          accordance with the commercial arbitration rules of
                          the American Arbitration Association.  Any award by
                          the arbitrator(s) shall be final, binding and not
                          appealable, and judgment may be entered thereon in
                          any court of competent jurisdiction.

         12.14   ACTUAL KNOWLEDGE.  The term "actual knowledge of the Seller,"
or any similar phrase, shall mean the actual present knowledge of Seller's
officers and Managers who are directly involved in the negotiation of this
Agreement.

         Executed as of the date first above mentioned.

                                  SELLER:

                                  HSRTW, INC.


                                  --------------------------------------
                                  By:  George H. Solich
                                  Title:  Vice President, Acquisitions &
                                  Divestitures





                                       28
<PAGE>   30
                                  HORIZON GAS PARTNERS, L.P.

                                  BY:  HORIZON NATURAL RESOURCES, INC.
                                  GENERAL PARTNER


                                  -----------------------------------
                                  By: R. Shannon Hall
                                  Title:  Vice-President

                                  BUYER:

                                  GOTHIC ENERGY CORPORATION


                                  -----------------------------------
                                  By:  Michael Paulk
                                  Title:  President





                                       29

<PAGE>   1
                                                                   EXHIBIT 10.44




                    AMENDMENT TO PURCHASE AND SALE AGREEMENT


         This Amendment to Purchase and Sale Agreement ("Amendment") is dated
this 16th day of July, 1997, and is among HSRTW, Inc., a Delaware corporation,
with an office address of 1999 Broadway, Suite 3600, Denver, Colorado 80202 and
Horizon Gas Partners, L.P., a Delaware limited partnership with an office
address of 2512-C East 71st Street, Tulsa, Oklahoma 74136-5575 (collectively
"Seller") and Gothic Energy Corporation, an Oklahoma corporation with an office
address of 5727 South Lewis Avenue, Suite 700, Tulsa, Oklahoma  74105-7148
("Buyer").

         Seller and Buyer have entered into a Purchase and Sale Agreement date
June 30, 1997 (the "Agreement") covering certain Interests (as defined in the
Agreement).  The parties wish to amend the Agreement as set forth below.
Unless specifically defined in this Amendment, capitalized terms shall have the
meaning set forth in the Agreement.

         In consideration of the mutual promises set forth below, and other
good and valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, the parties agree as follows:

         1.      The first sentence of Section 5.2(b) shall be amended to read
as follows:

                       Buyer shall give Seller written notice of Title Defects
                       immediately upon discovering such Title Defects, but in
                       no event after August 15, 1997.

         2.      Seller shall provide Exhibits A-2, B, C, D, and E to Buyer on
or before August 15, 1997.

         3.      Except as set forth in this Amendment, the terms of the
Agreement remain unchanged and in full force and effect.



                                           SELLER:

                                           HSRTW, INC.



                                                                               
                                           ------------------------------------
                                           By:  George H. Solich
                                           Title:  Vice President, Acquisitions
                                                   & Divestitures



<PAGE>   2


                                           HORIZON GAS PARTNERS, L.P.

                                           BY:  HORIZON NATURAL RESOURCES, INC.
                                           GENERAL PARTNER



                                                                              
                                           ------------------------------------
                                           By: R. Shannon Hall
                                           Title:  Vice-President

                                           BUYER:

                                           GOTHIC ENERGY CORPORATION



                                                                               
                                           ------------------------------------
                                           By:  Michael Paulk
                                           Title:  President



                                                                               2




<TABLE> <S> <C>

<ARTICLE> 5
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               JUN-30-1997
<CASH>                                       2,578,941
<SECURITIES>                                         0
<RECEIVABLES>                               37,716,200
<ALLOWANCES>                                         0
<INVENTORY>                                  1,500,439
<CURRENT-ASSETS>                            67,756,168
<PP&E>                                     805,570,455
<DEPRECIATION>                             159,821,037
<TOTAL-ASSETS>                             722,944,419
<CURRENT-LIABILITIES>                       77,035,915
<BONDS>                                    353,221,884
                                0
                                          0
<COMMON>                                        17,139
<OTHER-SE>                                 197,753,158
<TOTAL-LIABILITY-AND-EQUITY>               722,944,419
<SALES>                                    122,512,061
<TOTAL-REVENUES>                           125,323,801
<CGS>                                       55,465,131
<TOTAL-COSTS>                               45,551,593
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                          15,376,355
<INCOME-PRETAX>                              8,930,722
<INCOME-TAX>                                 3,402,605
<INCOME-CONTINUING>                          5,528,117
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                 5,528,117
<EPS-PRIMARY>                                      .32
<EPS-DILUTED>                                      .32
        

</TABLE>


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