MIDDLE BAY OIL CO INC
SC 13E3/A, 1998-11-24
OIL & GAS FIELD EXPLORATION SERVICES
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                        Rule 13e-3 Transaction Statement
                           (Pursuant to Section 13(e)
                     of the Securities Exchange Act of 1934)

   
                                 AMENDMENT NO. 1
    

                        ENEX CONSOLIDATED PARTNERS, L.P.
                              (Name of the Issuer)

   
                          MIDDLE BAY OIL COMPANY, INC.
                           ENEX RESOURCES CORPORATION
                      (Name of Person(s) Filing Statement)
    


                      UNITS OF LIMITED PARTNERSHIP INTEREST
                         (Title of Class of Securities)

                      (CUSIP Number of Class of Securities)

                                                         Copy to:
     JOHN J. BASSETT                               H. GRADY THRASHER, III
Middle Bay Oil Company, Inc.                 Thrasher, Whitley, Hampton & Morgan
1221 Lamar Street, Suite 1020                Five Concourse Parkway, Suite 2150
    Houston, TX  77010                               Atlanta, GA  30328
      (713) 759-6808                                   (770) 804-8000

   (Name, Address and Telephone Number of Person Authorized to Receive Notices
           and Communications on Behalf of Person(s) Filing Statement)


This statement is filed in connection with (check the appropriate box):

a. [ ]   The filing of solicitation materials or an information statement
         subject to Regulation 14A [17 CFR 240.14a-1 to 240.14b-1], Regulation
         14C [17 CFR 240.14c-1 to 240.14c-101] or Rule 13e33(c) [Section
         240.13e-3(c)] under the Securities Exchange Act of 1934.

b. [X]   The filing of a registration statement under the Securities Act of
         1933.

c. [ ]   A tender offer.

d. [ ]   None of the above.

Check the following box if the soliciting materials or information statement
referred to in checking box (a) are preliminary copies: [ ]

                            CALCULATION OF FILING FEE

<TABLE>
<CAPTION>
Transaction Valuation*                                 Amount of Filing Fee**
<S>                                                    <C>   
     $11,730,000                                              $2,346
</TABLE>

*        For purposes of calculating the fee only. The filing fee was calculated
         pursuant to Rule O-11 of the Securities Exchange Act of 1934 and is
         based on the Exchange Value to be paid to the Partnership to purchase
         all of its oil and gas assets, as set forth in the Proposal contained
         in the Prospectus of Middle Bay Oil Company, Inc. to be submitted to
         Unitholders in the Partnership.

**       1/50th of one percent of the estimated aggregate value of the
         Partnership's assets.
<PAGE>   2
[X]      Check box if any part of the fee is offset as provided by Rule
         O-11(a)(2) and identify the filing with which the offsetting fee was
         previously paid. Identify the previous filing by registration statement
         number or the Form or Schedule and the date of its filing.

<TABLE>
<S>                                              <C>      
                 Amount Previously Paid:         $3,460.94
                 Registration No.:               333-60447
                 Filing Party:                   Middle Bay Oil Company, Inc.
                 Date Filed:                     July 31, 1998; October 16, 1998
</TABLE>
<PAGE>   3
   
         This Rule 13e-3 Transaction Statement (the "Schedule 13E-3") is being
filed by Middle Bay Oil Company, Inc., an Alabama corporation ("Middle Bay" or
the "Company"), and Middle Bay's majority-owned subsidiary, Enex Resources
Corporation, a Delaware corporation ("Enex" or the "General Partner"), pursuant
to Section 13(e) of the Securities and Exchange Act of 1934, as amended (the
"Exchange Act"), and Rule 13e-3 thereunder in connection with the Exchange
Offer and Proposal to be made to limited partners of Enex Consolidated Partners,
L.P. (the "Partnership"). The purpose of the Exchange Offer is to acquire all of
the issued and outstanding units of limited partnership interest ("Units") of
the Partnership and to obtain the consents of the limited partners of the
Partnership to sell substantially all of the Partnership's oil and gas assets to
Middle Bay and liquidate the Partnership (the "Transaction"). Middle Bay filed
Amendment No. 3 to Registration Statement on Form S-4 on November 12, 1998 with
the Securities and Exchange Commission ("SEC"), which includes a Prospectus (the
"Prospectus"). The preceding cross-reference sheet, prepared pursuant to General
Instruction F to Schedule 13E-3, shows the location in the Prospectus of the
information required to be included in response to the items of Schedule 13E-3.
The information contained in the Prospectus, including all exhibits thereto, is
expressly and hereby incorporated herein by reference, and the responses to each
item are qualified in their entirety by reference to such information. The
Company anticipates filing a definitive Prospectus with the SEC
contemporaneously with the filing of this Schedule 13E-3 in final form.
    

   
         The filing of this Schedule 13E-3 shall not be deemed an admission that
Section 13(e) of the Exchange Act or Rule 13e-3 thereunder is applicable to the
Exchange Offer that is the subject of the Prospectus. Each of the Partnership,
Middle Bay and Enex expressly disclaim that the sale of substantially all of the
assets and the subsequent liquidation of the Partnership under the terms and
conditions set forth in the Prospectus constitutes a "sale of substantially all
of the assets of an issuer to its affiliate or group of affiliates" within the
meaning of Rule 13e-3.
    

ITEM 1.  ISSUER AND CLASS OF SECURITY SUBJECT TO THE TRANSACTION

         (a) The name of the Issuer and address of its principal executive
office are:

                        Enex Consolidated Partners, L.P.
                          1221 Lamar Street, Suite 1020
                                Houston, TX 77010

         (b) The information set forth under the caption "Business of the
Partnership" in the Prospectus is incorporated herein by reference regarding the
title, the amount outstanding and the number of holders of record of units of
limited partnership interests (the "Units").

         (c) There is currently no established trading market for the Units.

         (d) The information set forth under the caption "Business of the
Partnership - Distribution" in the Prospectus is incorporated herein by
reference.

         (e) There has been no offering, registered or exempt, of Units of the
Partnership for cash in the past three years.


                                      - 1 -
<PAGE>   4
         (f) The information regarding the purchase of Units by the General
Partner pursuant to the right of presentment under the Partnership's Limited
Partnership Agreement during the Partnership's fiscal years 1997 and 1998 is set
forth under the caption "Certain Transactions Between the Partnership, Enex and
Middle Bay" in the Prospectus and is incorporated herein by reference. No
executive officer or director of the General Partner and no person controlling
the General Partner have purchased any Units during the periods indicated.

ITEM 2.  IDENTITY AND BACKGROUND

   
         (a)-(f) This Statement is being filed by Middle Bay, which is the
parent of Enex, and Enex, which is the General Partner of the Partnership.
Middle Bay is also the proposed purchaser of substantially all the assets of the
Partnership. Middle Bay and Enex are independent oil and gas companies whose
principal businesses are the development, acquisition and operation of oil and
gas properties primarily in the Mid-Continent and Gulf Coast regions of the
contiguous United States. Middle Bay's and Enex's principal executive offices
are located at 1221 Lamar Street, Suite 1020, Houston, Texas 77010. The
information set forth in the Prospectus under the caption "Corporate Governance
of Middle Bay" is incorporated herein by reference. None of the executive
officers or directors of Middle Bay or Enex has, during the last five years,
been convicted in a criminal proceeding (excluding traffic violations or similar
misdemeanors) or has been a party to a civil proceeding which resulted in a
judgment, decree or final order enjoining further violations or prohibiting
activities subject to federal or state securities laws or finding any violation
of such laws. All of the executive officers and directors of Middle Bay and Enex
are citizens of the United States.
    

ITEM 3.  PAST CONTACTS, TRANSACTIONS OR NEGOTIATIONS

         (a)(b) The information set forth in the Prospectus under the captions
"Reasons for the Exchange Offer - Certain Transactions Between the Partnership,
Enex and Middle Bay" and "Summary - General Background Information Leading Up to
the Tender Offer" is incorporated herein by reference.

ITEM 4.  TERMS OF THE TRANSACTION

         (a) The information set forth in the Prospectus under the captions
"Risk Factors and Material Considerations," "The Exchange Offer and Proposal,"
"Method of Determining Exchange Value" and "Consent Procedures" is incorporated
herein by reference.

         (b) There are no terms or arrangements concerning the transaction which
are not identical for the security holders of the same class of securities of
the Partnership.

ITEM 5.  PLANS OR PROPOSALS OF THE ISSUER OR AFFILIATE

         (a)-(b) The information set forth in the Prospectus under the caption
"The Exchange Offer and Proposal" is incorporated herein by reference.

         (c) No change in management of the Partnership will occur as the
Partnership will be dissolved if the Proposal is approved. If the Proposal is
approved, the information set forth in the Prospectus under the


                                      - 2 -
<PAGE>   5
captions "Comparative Rights of Security Holders," "Description of Middle Bay
Securities" and "Corporate Governance of Middle Bay" is incorporated herein by
reference.

         (d) The information set forth in the Prospectus under the captions
"Comparative Rights of Security Holders" and "Price Range of Middle Bay Common
Stock; Dividends and Distribution" is incorporated herein by reference.

         (e) The information set forth in the Prospectus under the captions "The
Exchange Offer and Proposal" and "Comparative Rights of Security Holders" is
incorporated herein by reference.

         (f) If limited partners approve the Proposal and the Partnership is
liquidated and dissolved, the Partnership will become eligible for suspension of
reporting requirements and termination of registration under the Exchange Act.

         (g) The Partnership does not currently have an obligation to file
reports pursuant to Section 15(d) of the Exchange Act.

ITEM 6.  SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION

         (a) The information set forth in the Prospectus under the caption "The
Exchange Offer and Proposal" is incorporated herein by reference.

         (b) The information set forth in the Prospectus under the caption "The
Exchange Offer and Proposal - Expenses; Fees" is incorporated herein by
reference.

         (c) The information set forth in the Prospectus under the caption "The
Exchange Offer and Proposal - Expenses; Fees" is incorporated herein by
reference.

         (d) Not applicable.

ITEM 7.  PURPOSE(S), ALTERNATIVES, REASONS AND EFFECTS

         (a) The information set forth in the Prospectus under the captions "The
Exchange Offer and Proposal" and "Reasons for the Exchange Offer" is
incorporated herein by reference.

         (b) The information set forth in the Prospectus under the caption
"Reasons for the Exchange Offer" is incorporated herein by reference.

         (c) The information set forth in the Prospectus under the captions
"Reasons for the Exchange Offer" and "Summary - Background Information Leading
Up to the Exchange Offer" is incorporated herein by reference.

         (d) The information set forth in the Prospectus under the captions
"Risk Factors and Material Considerations," "Material Federal Tax Consequences,"
"The Exchange Offer and Proposal," "Method of


                                      - 3 -
<PAGE>   6
Determining Exchange Value," "Reasons for the Exchange Offer" and "Comparative
Rights of Security Holders" is incorporated herein by reference.

ITEM 8.  FAIRNESS OF THE TRANSACTION

         (a) The information set forth in the Prospectus under the captions
"Summary - Fairness of the Exchange Value," "Comparison of Exchange Value with
Values Used in 1997 Partnership Roll-up," "Alternatives to the Exchange,"
"Reasons for the Exchange Offer - Recommendations of the General Partner and
Middle Bay" and "Method of Determining Exchange Value" is incorporated herein by
reference. No director of the General Partner dissented to or abstained from
voting on any approval of the actions of the General Partner or Middle Bay in
connection with the matters covered in this Schedule 13E-3.

         (b) The information set forth in the Prospectus under the captions
"Summary - Fairness of the Exchange Value," "Comparison of Exchange Value with
Values Used in 1997 Partnership Roll-up," "Alternatives to the Exchange,"
"Reasons for the Exchange Offer - Recommendations of the General Partner and
Middle Bay" and "Method of Determining Exchange Value" is incorporated herein by
reference. No director of the General Partner dissented to or abstained from
voting on any approval of the actions of the General Partner or Middle Bay in
connection with the matters covered in this Schedule 13E-3.

         (c) The Transaction was structured so that approval of at least a
majority of unaffiliated security holders is not required.

         (d) The information set forth in the Prospectus under the captions
"Risk Factors and Material Considerations - Lack of Arms-Length Negotiation to
Determine Value of Partnership Units," "Risk Factors and Material Considerations
- - Lack of Independent Representative; Fairness Opinion" and "Method of
Determining Exchange Value" is incorporated herein by reference.

         (e) The actions taken by the General Partner, acting in that capacity,
in connection with the Transaction covered by this Schedule 13E-3 have been
approved by the General Partner's and Middle Bay's Boards of Directors. A
majority of the nonemployee directors voted in favor of such actions. The
information set forth in the Prospectus under the caption "Reasons for the
Exchange Offer - Approval of the Board of Directors of Middle Bay; Reasons for
the Approval" is incorporated herein by reference.

         (f) No firm offers of which the Partnership, the General Partner or
Middle Bay is aware have been made during the preceding 18 months by any
unaffiliated person for (i) the merger or consolidation of the Partnership into
or with such person or such person into or with the Partnership; (ii) the sale
or other transfer of all or any substantial part of the assets of the
Partnership; or (iii) securities of the Partnership which would enable the
holder thereof to exercise control of the Partnership.

ITEM 9.  REPORTS, OPINIONS, APPRAISALS AND CERTAIN NEGOTIATIONS

         (a)-(b) The information set forth in the Prospectus under the captions
"Method of Determining Exchange Value" and "Reasons for the Exchange Offer" and
the fair market value opinion of H.J. Gruy and


                                      - 4 -
<PAGE>   7
Associates, Inc. and the Fairness Opinion of Harris Webb & Garrison attached to
the Prospectus are incorporated herein by reference.

   
         (c) The information set forth in the Prospectus under the captions
"Method of Determining Exchange Value - Exchange Value Components" and "Fairness
Opinion" is incorporated herein by reference. A copy of the fair market value
opinion of H.J. Gruy and Associates, Inc. (the "Gruy Report") and the Fairness
Opinion prepared by Harris Webb & Garrison, Inc. ("HWG") will be delivered to
each limited partner with the Prospectus. A copy of the HWG analysis in support
of the Fairness Opinion is included as Exhibit 17(b) to this Schedule 13E-3. The
HWG analysis included herewith as Exhibit 17(b), as well as each of the Gruy
Report and the Fairness Opinion, are available for inspection at the principal
executive offices of Middle Bay and Enex during their regular business hours by
any interested Unitholder of the Partnership or his or her representative who
has been so designated in writing.
    

ITEM 10. INTEREST IN SECURITIES OF THE ISSUER

         (a) The information set forth in the Prospectus under the caption
"Business of the Partnership - Number of Equity Security Holders" is 
incorporated herein by reference. None of the executive officers or directors of
Middle Bay or the General Partner owns any interests in the Partnership.

         (b) No transaction in the securities of the Partnership has taken place
in the last 60 days by any executive officers or directors of the General
Partner or Middle Bay or by the Partnership.

ITEM 11. CONTRACTS, ARRANGEMENTS OR UNDERSTANDINGS WITH RESPECT TO THE ISSUER'S
         SECURITIES

   
         Middle Bay is the parent of the General Partner. No contract,
arrangement, understanding or relationship exists between Middle Bay or its
executive officers or directors or Enex or its executive officers or directors
and any person in connection with the Exchange Offer with respect to the
securities of the Partnership.
    

ITEM 12. PRESENT INTENTION AND RECOMMENDATION OF CERTAIN PERSONS WITH REGARD TO
         THE TRANSACTION

         The General Partner owns 56.24% of the outstanding Units of the
Partnership and will vote such Units in favor of adoption of the Proposal. The
information set forth under the captions "Reasons for the Exchange Offer -
Recommendation of the General Partner" and "Approval of the Board of Directors
of Middle Bay; Reasons for the Approval" is incorporated herein by reference.

ITEM 13. OTHER PROVISIONS OF THE TRANSACTION

         (a) The information set forth in the Prospectus under the caption "The
Exchange Offer and Proposal - Limited Appraisal and Dissenters' Rights" is
incorporated herein by reference.


                                      - 5 -
<PAGE>   8
         (b) The information set forth in the Prospectus under the captions
"Reasons for the Exchange Offer - Access to Investor Lists" and "Risk Factors
and Material Considerations - Lack of Independent Representative; Fairness
Opinion" is incorporated herein by reference.

         (c) The Transaction does not involve the exchange of any debt
securities.

ITEM 14. FINANCIAL INFORMATION

         (a) The financial information required by this Item is incorporated
herein by reference to the Prospectus under the captions "Selected Financial
Data - Partnership" and "Index to Financial Statements -Enex Consolidated
Partners, L.P."

   
         (b) Because approval of the Proposal by limited partners will result in
dissolution of the Partnership, pro forma data on the effect of the Transaction
on the Partnership would not be meaningful or material.
    

ITEM 15. PERSONS AND ASSETS EMPLOYED, RETAINED OR UTILIZED

   
         (a) Certain directors, officers and employees of the General Partner
and/or Middle Bay, not especially employed for this purpose, may solicit limited
partners relating to the Proposal, without additional remuneration therefor, by
mail, telephone, telegraph or personal interview. The estimated costs to be
incurred by the Partnership in connection with the proposed dissolution and
liquidation are described in the response to Item 6(b) above. The information
set forth in the Prospectus under the caption "Consent Procedures Solicitation
of Letters of Transmittal" is incorporated herein by reference. 
    

         (b) No person, other than those described in the response to Item
15(a), has been or will be retained or compensated to make solicitations or
recommendations in connection with the Proposal.

ITEM 16. ADDITIONAL INFORMATION

         No additional material information is necessary to make the required
statements, in light of the circumstances under which they are made, not
materially misleading.

ITEM 17. MATERIAL TO BE FILED AS EXHIBITS

         (a) There is no loan agreement of the type referred to in Item 6 of
this Schedule.

   
         (b) The fair market value opinion and the reserve reports of H.J. Gruy
and Associates, Inc. are incorporated herein by reference to Exhibit A to the
Prospectus. The Fairness Opinion of Harris Webb & Garrison, Inc. is incorporated
by reference to Exhibit D to the Prospectus. The Fair Market Value Report by
H.J. Gruy and Associates in connection with the April 7, 1997 Enex Consolidated
Partners, L.P. limited partnership roll-up is incorporated by reference to
exhibits to Enex Consolidated Partners, L.P. Form S-4 (registration no.
333-09953) effective April 7, 1997.  The HWG analysis in support of the Fairness
Opinion is included herewith as (b)(1) to this Schedule 13E-3. The H.J. Gruy and
Associates, Inc. report of estimated proved reserves and future net cash flows
as of January 1, 1998 is included herein as (b)(2).
    

   
         (c) There are no contracts, arrangements, understandings or
relationships of the type referred to in Item 11 of this Schedule.
    


                                      - 6 -
<PAGE>   9
   
         (d) There are no disclosure materials of the type furnished to security
holders in connection with the Transaction pursuant to Rule 13e-3(d).

         (e) The dissenters' and appraisal rights and procedures for exercising
such rights as referred to in Item 13(a) of this Schedule are described in the
Prospectus under the caption "The Exchange Offer and Proposal - Limited
Appraisal and Dissenters' Rights" and the Letter of Transmittal attached as
Exhibit C to the Prospectus, each of which is incorporated herein by reference.
The Prospectus and the Letter of Transmittal will be furnished to each
Unitholder in connection with the Exchange Offer and Proposal.

         (f) All solicitation of or recommendations to security holders referred
to in Item 15(b) will not be made by or on behalf of the Partnership.
    


                                    SIGNATURE

   
         After due inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this Transaction Statement, as amended by this
Amendment No. 1, is true, complete and correct.
    

   
Dated:  November 23, 1998
    
                                ENEX  CONSOLIDATED  PARTNERS,  L.P.


                                By:  Enex Resources Corporation, as General
                                     Partner of Enex Consolidated Partners, L.P.

                                             /s/ John J. Bassett
                                By:
                                        John J. Bassett, President

   
Dated:  November 23, 1998
                                MIDDLE  BAY  OIL  COMPANY,  INC.

                                             /s/ John J. Bassett
                                By:
                                        John J. Bassett, President

Dated:  November 23, 1998
                                ENEX  RESOURCES  CORPORATION

                                             /s/ John J. Bassett
                                By:
                                        John J. Bassett, President
    

                                      - 7 -


<PAGE>   1
                                                                  EXHIBIT (b)(1)

                               M E M O R A N D U M


TO:               File

FROM:             G. Clyde Buck
                  Holden W. Burrow

DATE:             October 15, 1998

RE:               Logic Memo to Support HWG Fairness Opinion to Partnership
                  Unitholders of Enex Consolidated, L.P. in Connection with the
                  Issuance of a New Convertible Redeemable Series C Preferred
                  Stock by Middle Bay Oil Company, Inc. to the Partnership
                  Unitholders of Enex Consolidated, L.P.



                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
A. BACKGROUND OF MIDDLE BAY OIL COMPANY, INC                                   3

B. BACKGROUND OF ENEX CONSOLIDATED PARTNERS, L.P.                              4

C. SUMMARY OF CRITICAL FACTORS TO SUPPORT

         HWG'S FAIRNESS OPINION                                                6
</TABLE>




                                       1
<PAGE>   2
                                    EXHIBITS

1. H.J. Gruy Reserve Report as of 10/1/98

2. Reserve Calculations based on SEC Case as of 10/1/98

3. Comparable Convertible Preferred Stocks- Energy Related

4. Comparable Convertible Preferred Stocks - Non-Energy Related

5. Comparable Companies - Selected Data for Five Comparable E & P Companies




                                       2
<PAGE>   3
A.       BACKGROUND OF MIDDLE BAY

         Middle Bay Oil Company, Inc. ("Middle Bay") is a Houston-based
         independent oil and gas company engaged in exploration, development and
         production of oil and natural gas in the Gulf Coast and Mid-Continent
         regions. Middle Bay was formed through the reorganization of Bay City
         Consolidated Partners, Ltd. and was incorporated in Alabama in 1992.
         Middle Bay employs 27 people. Middle Bay is in the process of acquiring
         all of the limited partnership interests of Enex Consolidated Partners,
         L.P. (the Enex Partnership").

         Middle Bay has made six acquisitions in the past two years: NPC Energy
         Corporation in 1996; Bison Energy Corporation, Shore Oil Company and
         Riceville Field in 1997; Enex Resources Corporation and Service
         Drilling, LLC. in 1998. In March 1998, Middle Bay acquired 79.2% of
         Enex Resources Corporation, which is the General Partner of the Enex
         Partnership. Enex Resources Corporation is the owner of 620,097
         partnership units or 56.24% of the 1,102,631 total partnership units of
         the Enex Partnership.

         The principal assets and liabilities of Middle Bay are shown on page 5.
         The objective of Middle Bay is to grow through the addition and
         exploitation of reserves via acquisitions and a moderate exploration
         program. The primary focus will continue to be on long-life oil and
         natural gas reserves in the Gulf Coast and mid-continent regions.

         Middle Bay uses successful-efforts accounting for its oil and gas
         assets, which is a normal and generally accepted method of accounting,
         but which usually does not indicate fair market value of underlying oil
         and gas assets as accurately as a reserve report.




                                       3
<PAGE>   4
B.       BACKGROUND OF THE ENEX PARTNERSHIP

         The Enex Partnership was formed through the combination of 34 Enex Oil
         and Gas Limited Partnerships on June 30, 1997 under the New Jersey
         Uniform Limited Partnership Law. The Enex Partnership is based in
         Kingwood, Texas and has no regional offices. Enex Resources Corporation
         (the "General Partner") manages the Enex Partnership.

         The Enex Partnership is engaged in the oil and gas business with a
         primary focus of acquiring ownership interests in producing oil and gas
         properties. The Enex Partnership currently owns royalty interests,
         overriding royalty interests and working interests in producing
         properties located primarily in Texas, Oklahoma and Louisiana. The Enex
         Partnership has no intentions to participate in exploratory drilling
         and usually will not participate in developmental drilling unless it
         believes the drilling will enhance the value of its producing
         properties. If developmental drilling is conducted, it is financed
         through third party borrowings or funds from operations.

         A balance sheet as of 6/30/98 for the Enex Partnership is shown on page
         5.




                                       4
<PAGE>   5
                            MIDDLE BAY BALANCE SHEET

                                   (In 000's)

                                  AS OF 6/30/98


<TABLE>
<S>                                                             <C>    
         Current Assets                                         $ 7,642
         Non-Current Assets                                         170
         Oil and Gas Properties, Net                             60,231
         Other Assets                                               200

         Total Assets                                           $68,243
                                                                =======

         Current Liabilities                                      7,241
         Long Term Debt                                          26,629
         Deferred Taxes                                           3,709
         Other Liabilities                                          522
         Minority Interest in Enex                                7,034
         Shareholders' Equity                                    23,109

         Total Liabilities and Equity                           $68,243
                                                                =======
</TABLE>




                       THE ENEX PARTNERSHIP BALANCE SHEET

                                   (In 000's)

                                  AS OF 6/30/98


<TABLE>
<S>                                                              <C>    
         Current Assets                                          $ 2,607
         Oil and Gas Properties, Net                               9,320

         Total Assets                                            $11,927
                                                                 =======

         Current Liabilities                                         603
         Limited Partners' Capital Subject To Redemption          11,314
         General Partner Capital                                      11

         Total                                                   $11,927
                                                                 =======
</TABLE>




                                       5
<PAGE>   6
C.       SUMMARY OF CRITICAL FACTORS TO SUPPORT HWG'S FAIRNESS OPINION

         The following items are noted to create a record of the critical
         factors considered in conjunction with (a) our overall knowledge of
         fairness and business transactions from a financial point of view and
         (b) our business judgment in rendering a fairness opinion to the Enex
         Partnership in October 1998. We define "fair market value" as "the
         price agreed upon between a willing buyer and a willing seller with
         each having full knowledge of all relevant facts and neither being
         under any compulsion to act."

         In preparing this memo, with the Enex Partnership's approval, we
         performed no audit work, did not prepare appraisals of specific Enex
         Partnership assets and did not verify the accuracy or completeness of
         information furnished to us by the Enex Partnership and Middle Bay.

         HWG's engagement to furnish a fairness opinion in connection with the
         Exchange is set forth in an engagement letter agreement between HWG and
         Middle Bay dated September 17, 1998. The agreement involves a total fee
         of $40,000, reimbursement for reasonable out-of-pocket expenses and
         indemnification of HWG. HWG has performed financial advisory services
         for Middle Bay in recent months for which it was paid an advisory fee
         of $20,000 by Middle Bay. As part of their services, HWG performed a
         financial evaluation of Middle Bay. As a result of that evaluation, HWG
         issued a research report and buy recommendation with respect to the
         Middle Bay common stock.

1.       Our primary logic for evaluating the fairness of the Proposed Exchange
         to the Partnership Unitholders of the Enex Partnership was to:

         (a)      estimate a reasonable range for the current fair market value
                  per Unit of 100% of the partnership units of the Enex
                  Partnership; 

         (b)      estimate a reasonable range for the current fair market value
                  of the new convertible preferred stock to be issued by Middle
                  Bay; and

         (c)      determine that the range of the value for each Unit being
                  surrendered was reasonably close to or equal to the value of
                  the new Middle Bay convertible stock being received for each
                  Unit.



                                       6
<PAGE>   7
         We estimated a total exchange value range by first estimating a
         reasonable range of the fair market value of the total proved reserves
         of the Enex Partnership and then adding an estimated 9/30/98 net
         working capital of $1.25 million and general intangibles of $0.1
         million. Our range of total exchange value was then divided by the
         1,102,631 Units which resulted in a value range per Unit of $9.48 -
         $11.84 (see calculation table in next paragraph). We then estimated the
         fair market value range for each share of Convertible Preferred and
         multiplied by the exchange ratio of 2.128 to get a fair market value
         range for the preferred stock being exchanged for each Unit ($8.51 -
         $10.64).

         Finally, we noted that our two ranges of fair market value overlap
         between $9.48 and $10.64 per Unit, which appears to be an ample portion
         of the two ranges for the Exchange to be fair to the public Unitholders
         (i.e., that the value received is reasonably close to or equal to the
         value surrendered).




                                       7
<PAGE>   8
<TABLE>
<S>                                                                 <C>                  <C>              
                  Value of Reserves                                 $9.1 - 11.7 mil.     (A)
            
                  Working Capital                                         1.25        
            
                  Other Assets                                            0.1
            
                  Total Assets                                        $10.5 - 13.1
            
                  Units Outstanding (in mil.)                          1.102631

                                                                     -------------            
                  Range of Value/ Unit                               $9.48 - 11.84
                                                                     -------------            

                  Range of Value of Cv. Pfd / Share                   $4.00 - 5.00       (B)
            
                  Number of Shares of Cv. Pfd Per Unit (in mil.)          2.128

                                                                     -------------            
                  Range of Value of Cv. Pfd / Unit                   $8.51 - 10.64
                                                                     -------------            

                                                                     -------------            
                  Range of Overlap                                   $9.48 - 10.64
                                                                     -------------            
</TABLE>

         (A)      Based primarily upon H.J. Gruy value of $10.4 million (see
                  page 9 of this memo) and the uncertainty of any one value.

         (B)      See page 19 of this memo. Our analysis indicates that $4.00 -
                  $5.00 is a reasonable range of value.

2.       Although H.J. Gruy & Associates ("H.J. Gruy") estimated the fair market
         value of the Enex reserves at $10.38 million, we noted that H.J. Gruy
         also estimated the orderly liquidation value at $8.86 million after
         considering that the Enex Partnership would have significant expenses
         and fees during an estimated 12-month liquidation period. Gruy is thus
         saying that only $8.86 million will be available from the sale of the
         reserves to pay Unitholders.

         If this is true, the preceding analysis of value given up vs. value
         received in the Exchange might be more accurate if we substituted $8.86
         million for the $10.38 million used to start the analysis of a range of
         "Value of Reserves." The revised calculations would be as follows:




                                       8
<PAGE>   9
<TABLE>
<CAPTION>
<S>                                                                 <C>                       <C>                   
                  Value of Reserves                                 $7.8 - 10.0 mil.          (A)

                  Working Capital                                         1.25     

                  Other Assets                                            0.1      

                  Total Assets                                        $9.2 - 11.4
              
                  Units Outstanding (in mil.)                           1.102631

                                                                     -------------            
                  Range of Value/ Unit                               $8.29 - 10.29
                                                                     -------------            

                  Range of Value of Cv. Pfd / Share                   $4.00 - 5.00            (B)
              
                  Number of Shares of Cv. Pfd Per Unit (in mil.)         2.128    

                                                                     -------------            
                  Range of Value of Cv. Pfd / Unit                   $8.51 - 10.64
                                                                     -------------            
              
                                                                     -------------            
                  Range of Overlap                                   $8.51 - 10.29
                                                                     -------------            
</TABLE>     

         (A)      Based primarily upon H.J. Gruy orderly liquidation value of
                  $8.86 million (see pages 11-12 of this memo) and the
                  uncertainty of any one value.

         (B)      See page 20 of this memo. Our analysis indicates that $4.00 -
                  $5.00 is a reasonable range of value.

         As noted, this revised analysis shows that the value given up in the
         Exchange is very nearly equal to the value received. We believe this
         clearly indicates the fairness of the Exchange.

3.       We noted that the number (i.e., 2.128 shares/Unit) of Series C
         Convertible Preferred shares offered in exchange for each Unit was
         determined by Middle Bay management by dividing a Total Exchange Value
         of $10.64 per Unit by the $5.00 liquidation value per share of Series C
         Preferred ($10.64 divided by $5.00 is 2.128 shares/Unit). We noted that
         the Exchange will cause a taxable event for Unitholders that are not
         exempt from federal income tax.

4.       In looking at 100% of the Enex Partnership, we began with the 9/23/98
         reserve report as of 10/1/98 prepared by H.J. Gruy and the Enex
         Partnership unaudited balance sheet for 6/30/98. The 9/23/98 reserve
         report indicated a total proved reserve value of $14.1 million for the
         Enex Partnership's oil and gas assets, as noted on the following page.
         Assumptions included a 10% per annum discount factor plus certain price
         and cost escalations.




                                       9
<PAGE>   10
SUMMARY OF RESERVES AS OF OCTOBER 1, 1998 - ESCALATED CASE FOR CASH FLOWS

                                 (IN THOUSANDS)
<TABLE>
<CAPTION>
                                                           Present Value at 10% of
                                 Oil (Mbls)   Gas (MMcf)       Net Cash Flows
<S>                                    <C>         <C>                     <C>    
Proved Developed Producing             781         6,543                   $11,831
Proved Developed Non Producing          17         2,415                     2,309
Total Proved                           797         8,958                   $14,140
                                                                     
Probable                                16           692                   $   628
Possible                                 1           179                   $   312
</TABLE>


         The reserve report was based on the following price escalations:

<TABLE>
<CAPTION>
                                 OIL                     GAS                    NGLs
         YEAR                  ($/bbl)                 ($/Mcf)                ($/bbl)
         ----                  -------                 -------                -------
<S>                            <C>                     <C>                    <C>  
         1998                  $13.00                  $2.50                  $8.45
          % change                7.7%                  -8.0%                   7.7%
         1999                   14.00                   2.30                   9.10
          % change                7.1%                   0.0%                   7.1%
         2000                   15.00                   2.30                   9.75
          % change                2.5%                   2.5%                   2.5%
         2001                   15.38                   2.36                   9.99
</TABLE>

         The initial prices were the average NYMEX prices for oil and natural
         gas for the years 1998 through 2000 as of 9/23/98. After the year 2000,
         oil prices were escalated at 2.5% per year to a maximum price of $35.00
         per barrel. After the year 2000, gas prices were escalated at 2.5% per
         year to a maximum price of $4.50 per Mcf (and to $22.75 per barrel for
         natural gas liquids). Operating expenses were escalated at an annual
         rate of 2 - 5% per year until natural gas reached its maximum value.
         All future net cash flows were then discounted at 10% per annum.

         We noted that the 9/23/98 report was an update of a report prepared as
         of 7/1/98. The 7/1/98 report showed a total proved reserve value of
         $15.6 million, 10.6% above the $14.1 million value estimated as of
         10/1/98.

         The 9/23/98 report estimates the fair market value of the proved
         reserves to be $10.38 million as of 10/1/98. This is 26% less than the
         aforementioned $14.1 million present value of future net cash flows
         discounted at 10% per 


                                       10
<PAGE>   11
         annum. The fair market value of the reserves was then added to an
         estimated $1.25 million net working capital and $0.1 million for
         general intangibles at 9/30/98, which management of Middle Bay
         determined resulted in a Total Exchange Value of $11.73 million (10.38
         + 1.35) or $10.64 per Unit ($11,730,000 / 1,102,631 Units). The $10.64
         per Unit represents the exchange value which management of Middle Bay
         has proposed. Middle Bay will issue 2.128 shares of the new Series C
         Convertible Preferred Stock for each Unit.

         We discussed with representatives of H.J. Gruy the methodology employed
         in their estimates. H.J. Gruy estimated the fair market value
         attributable to proved developed producing reserves by reducing the 10%
         percent discounted future net cash flow to reflect the impact of
         federal income tax (e.g., by increasing the discount rate by roughly 5
         - 10% depending on payback period). The internal rate of return and
         payout time were computed for this quantity and compared with those at
         which current acquisitions are completed. H.J. Gruy then made further
         suitable adjustments to correspond to these two financial indices when
         resulted in H.J. Gruy's estimated fair market value. H.J. Gruy divides
         properties into three categories: 1) long-life properties (i.e.,
         properties with 20 plus years remaining), 2) short-life properties
         (i.e., properties with less than 10 years remaining) and 3)
         intermediate-life properties (i.e., properties with lives of 10 - 20
         years). Based on H.J. Gruy's experience, recent transactions observed
         and general reserve knowledge, buyers expect an IRR of 18 - 20% for
         long-life properties and a much higher IRR for shorter life properties
         (i.e., 25 - 40%). The engineers at H.J. Gruy also believe that a
         long-life property should have a payback period of 3 to 6 years and a
         short-life property should have a 1 to 2.5 year payback.

         The 9/23/98 report also estimates the orderly liquidation value of the
         proved reserves to be $8.86 million. This estimate assumes the orderly
         liquidation of 


                                       11
<PAGE>   12
         the partnership assets over a 12 month period. H.J. Gruy assumed that
         the Enex Partnership would incur general and administrative expenses of
         $1.0 million plus approximately 5% ($0.5 million) for third party
         expenses such as broker fees, legal and land fees, printing costs and
         miscellaneous expenses. If we then added this orderly liquidation value
         of the proved reserves to an estimated $1.25 million of net working
         capital and $0.1 million of general intangibles on 9/30/98, we would
         get a revised Total Exchange Value of $10.2 million (8.86 + 1.35) or
         $9.26 per Unit ($10,211,000 / 1,102,631 Units).

         We surmise that H.J. Gruy recognized that (a) the price escalation
         assumptions used by H.J. Gruy might be more optimistic than what a
         normal willing buyer might have assumed on 9/30/98 (but a buyer
         probably would have assumed some price escalation because prices were
         considered by many to be temporarily depressed due to a short-term
         oversupply of both oil and gas), (b) if prices were escalated, a
         discount rate above 10% (e.g., 13%) might be used and (c) a buyer would
         normally evaluate PDP (proved developed producing) reserves more
         favorably (i.e., as less risky) than other categories of proved
         reserves. On the other hand, a buyer might also consider giving some
         value to probable and possible reserves, which are not part of proved
         reserves.

         In discussions with oil and gas executives currently considering
         acquisitions somewhat comparable to the Enex Partnership's primary
         assets, we were told that a reasonable fair market value reserve
         calculation by a buyer might assume either:

         (a)      flat current prices and costs plus a 10% discount factor ("SEC
                  Case"), or

         (b)      current prices and costs escalating at 3 - 5% per year plus a
                  10 - 15% discount factor, plus



                                       12
<PAGE>   13
         (c)      a 30 - 50% "haircut" for proved non-producing proved reserves,
                  such as proved behind pipe ("PDNP" or "PDBP") and proved
                  undeveloped ("PUD").

         It was also suggested to us that the value of PDNP reserves would be
         "haircut" by a buyer by roughly 20% in average or normal circumstances
         and that PUD reserves would be haircut 35 - 75%, depending on the
         quality of such undeveloped reserves and the likelihood that they would
         be developed at current prices for oil and gas.

5.       We were also provided an SEC Case reserve calculation prepared by
         management of Middle Bay as of 10/01/98 using flat current prices and
         costs and a 10% discount factor. We believe this SEC Case approximates
         a case with current prices and costs escalating at 3% per year a 13%
         discount factor (13% less 3% equals 10%). In the table below, Case A
         assumes flat prices and costs at a 10% discount rate. Case B has the
         same assumptions except we have applied a 50% haircut to Proved
         Developed Non-Producing reserves.


                 ESTIMATED VALUES - SEC CASE RESERVE VALUES

                   (In thousands except per unit amounts)

<TABLE>
<CAPTION>
                                                             CASE A      CASE B
<S>                                                          <C>         <C>    
Net Working Capital (1)                                      $ 1,250     $ 1,250
General Intangibles (2)                                          100         100
Market Value of Estimated Reserves (AS OF 10/1/98):
Proved Developed Producing                                     9,658       9,658
Proved Developed Non-Producing                                 1,736         868
Total Assets                                                  12,694      11,876

Long Term Debt                                                     0           0

Estimated Partnership Value at 10/1/98                       $12,694     $11,876
Total Partnership Units                                        1,103       1,103
Estimated Partnership Value Per Unit                         $ 11.51     $ 10.77
</TABLE>


(1) Estimated Net Book Value of Current Assets and Liabilities as of 9/30/98.

(2) Estimated as of 9/30/98.



                                       13
<PAGE>   14
         Assumptions

         Case A: Based on SEC Case (PV 10% and Flat Prices).

         Case B: Based on SEC Case (PV 10% and Flat Prices) with a 50% haircut
         for PDNP.


6.       Cash Yield Comparison

         We compared projected cash dividends of $0.50 per share per year to
         holders of the new Series C Preferred Stock to related cash
         distributions on Units, which are expected to be $1.33 per Unit in
         1999, $1.07 per Unit in the year 2000, and $0.81 in the year 2001.
         Middle Bay estimates that the remaining economic life of the Enex
         Partnership is six years based upon projected production volumes and
         cash flows from the Gruy reserve report.

         The preferred stockholders will receive a semi-annual dividend of $0.25
         per share. Annual dividends of $0.50 per share would be 10% of the
         $5.00 face value per share. These annual cash dividends of $0.50 thus
         would be $1.06 for the 2.128 preferred shares exchanged for each Unit
         and would thus be 1% below an average expected cash distribution per
         Unit of $1.07 for 1999 - 2001.

         The 1% difference is insignificant and helps show that the "value
         received" is fairly close to the "value surrendered" by each
         Unitholder.

7.       We reviewed historical cash distributions for the Enex Partnership's
         limited partners, which from 1996 to 1998 were:

<TABLE>
<CAPTION>
         YEAR                          CASH DISTRIBUTIONS         PER UNIT
<S>                                    <C>                        <C>     
       1996                                $2,464,947             $   2.24
       1997 (a)                             2,329,517                 2.11
       1997 (b)                             2,264,438                 2.05
       1998 (c)                             2,063,169                 1.87
</TABLE>



                                       14
<PAGE>   15
         Distributions paid through 6/30/97.

         Distributions paid from 7/1/97 to 12/31/97.

         Distributions paid through 6/30/98.

8.       Comparable Recent Transactions

         We reviewed certain recent transactions, but none were comparable
         enough to the Exchange to make our analysis of such transactions more
         important than our "value received" vs. "value surrendered" analysis in
         Items 1 and 2 of this logic memo.

         Triton Transaction

         On 8/31/98, Hicks, Muse, Tate & Furst, Inc. reached a definitive
         agreement under which an investment affiliate of Hicks Muse will
         initially invest approximately $130 million to acquire convertible
         preferred shares representing approximately 17% of Triton Energy's pro
         forma shares outstanding. The preferred shares will be convertible into
         ordinary shares at $17.50 per share and have an 8% dividend yield.
         Triton's stock price was $14.50 when the deal was negotiated and was
         $11.44 on 8/31/98. We note that this recent convertible preferred
         transaction is an example of two sophisticated unrelated parties
         negotiating a fair market deal. The 8% dividend is less than Middle
         Bay's proposed 10% and a significant indication that Middle Bay's
         proposal is fair even though Triton Energy is much larger than Middle
         Bay.

         Triton Energy Limited (NYSE: OIL) is an international oil and gas
         partnership with approximately a $300 million market capitalization.
         The company explores and produces through affiliates and subsidiaries.
         Triton's properties are located in Columbia, Malaysia, Thailand,
         Africa, Asia, Middle East and Europe.



                                       15
<PAGE>   16
         Hicks, Muse, Tate & Furst, Inc. is a Dallas based leveraged buyout
         firm. Formed in 1989, the firm has completed or currently has pending
         more than 230 transactions with a total capital value in excess of $30
         billion.

         Coho Transaction

         On 8/24/98, an affiliate of Hicks, Muse, Tate & Furst, Inc. announced
         its intent to acquire 41.7 million newly issued shares of Coho Energy
         (NASDAQ: COHO) at $6.00 per share in exchange for 62% ownership. The
         $6.00 per share price represents a 28% premium over the 8/23/98 closing
         price of $4.69. The proceeds will be used to retire long-term debt and
         general working capital purposes. At $6.00 per share, the implied
         enterprise value for Coho Energy is $403 million. At 12/31/97, Coho
         Energy had 718 BCFE in proved reserves and an SEC PV 10% value of $526
         million. Given a $403 million enterprise value, the transaction was
         priced at $0.56 per Mcfe, 76% of the 12/31/97 SEC PV 10% value and 9.4
         times the trailing twelve month earnings before interest taxes
         depreciation and exploration costs ending 6/30/98.

         Coho Energy is a publicly-traded exploration and production company
         operating primarily in Louisiana and Mississippi.

         Costilla Transaction

         Enron Capital & Trade Resources Corp., an affiliate of Enron Corp.
         (NYSE: ENE) completed its purchase of 50,000 shares of a new series of
         cumulative convertible preferred stock at $1,000/share on 6/3/98 of
         Costilla Energy, Inc. (NASDAQ: COSE). The dividend rate is 7% for
         dividends paid in cash and 8% for dividends paid in shares of common
         stock. The convertible preferred stock converts at $12.39 per common
         share which is initially equivalent to 80.71 shares of common stock for
         each share of


                                       16
<PAGE>   17
         preferred stock. At closing on 6/3/98, the conversion premium was
         15.3%. As of 10/06/98, the conversion premium had increased to 77%
         ($12.39/7.00-1). Upon conversion, Enron would own 28.8% of the common
         stock of Costilla Energy. At 12/31/97, Costilla Energy had proved
         reserves of 241.8 BCFE and an SEC PV 10% value of $196.7 million.
         Assuming the conversion valuation of $173.6 (50/0.288) plus the 3/31/98
         debt of $195.6 million less 50 million of cash, Costilla had an
         enterprise value of $319.2 million. This valuation implies a
         transaction multiple of 162% of SEC PV 10% and $1.32 per Mcfe.

         Costilla Energy is an independent energy company with an approximately
         $70 million market capitalization. It is engaged in the exploration,
         development and acquisition of oil and gas properties, primarily in
         Texas, New Mexico and the Rocky Mountains region. Pioneer Natural
         Resources conducts oil and gas drilling and production operations in
         Texas, Kansas, Oklahoma, Louisiana, New Mexico and the Gulf of Mexico.

         Enron is engaged in the exploration, production and transportation of
         natural gas and crude oil; the generation and transmission of
         electricity; and the development and operation of power plants,
         pipelines and other energy related assets. Enron has a market
         capitalization of approximately $17 billion.

         Brigham Exploration Transaction

         On 8/25/98, Enron purchased $50 million of debt and equity securities
         from Brigham Exploration Company (NASDAQ:BEXP). The Enron financing
         transaction includes (i) the sale of $40 million of senior subordinated
         notes due 2003, (ii) the issuance of warrants to purchase 1,000,000
         shares of BEXP common stock at $10.45 per share and (iii) the sale of
         1,052,632 shares of BEXP common stock at a price of $9.50 per share (a
         33%


                                       17
<PAGE>   18
         premium over the 8/25/98 closing price of $7.13). The subordinated
         notes have a 12% interest rate. On 8/25/98, the warrants were priced at
         a 47% premium over the closing stock price. The 1,000,000 warrants
         represent 7% of Brigham Exploration on a fully diluted basis.

         We noted that the 12% rate on the subordinated notes was higher than
         the 10% rate on Middle Bay's preferred stock, but the notes were not
         convertible and the warrants were only for $10.0 million of common
         stock, which is 20% of the $50.0 million face value of the notes.

         Brigham Exploration has a $75 million market capitalization and is an
         independent exploration and production company that applies 3-D seismic
         imaging and other technologies to explore and develop onshore domestic
         natural gas and oil provinces.

         H S Resources Transaction

         On 9/1/98, Universal Resources, Corp., a division of Questar (NYSE:
         STR) acquired certain oil and gas properties from H S Resources (NYSE:
         HSE). Universal Resources, Corp. paid $155 million for 150 Bcfe of
         reserves located in the mid-continent, primarily the Arkoma and
         Anadarko Basins. The properties were 80% of gas and 90% of the proved
         reserves were currently producing. The transaction value implies a
         price of $1.03 per Mcfe of proved reserves. Additionally, included in
         the acquisition was 50 BCFE of probable and possible reserves.

         Questar has a $1.5 billion market capitalization and is engaged in
         energy development and production; gas gathering and processing;
         wholesale gas, electricity and hydro-carbon liquids trading; retail
         energy services; interstate gas transmission and storage; and retail
         gas distribution. H S Resources has a $200 million market
         capitalization and is an energy 


                                       18
<PAGE>   19
         company engaged in the development, acquisition, exploration,
         production and marketing of oil and natural gas in the Rocky Mountains,
         Mid-Continent and Gulf Coast regions.

         Arch Petroleum Transaction

         Pogo Producing (NYSE: PPP) completed its acquisition of Arch Petroleum
         on 8/17/98. The total consideration was $114 million of which $66.5
         million was stock and $47.5 million was assumed debt. Arch Petroleum
         had a 12/31/97 SEC PV 10% value of $68.7 million. The total proved
         reserves at 12/31/97 were 110.2 Bcfe (68% gas). Of the proved reserves,
         over 90% were proved developed producing. Given the enterprise value of
         $114 million, Pogo Producing paid $1.03 per Mcfe, 166% of 12/31/97 SEC
         PV 10% value and 8.0 times the trailing twelve months earnings before
         interest, taxes, depreciation, amortization and exploration costs
         ending 3/30/98.

9.       In looking at other somewhat comparable transactions, we also noted
         that a John S. Herold report for the second quarter of 1998 stated that
         16 mergers and acquisitions involving domestic oil and gas reserves
         were completed with an implied reserve value of $0.87 per mcfe and a
         61% gas mix. Seven deals were completed in the Mid-Continent region
         with an implied average reserve value of $0.83 per mcfe of proved
         reserves and a 48% gas mix. Three deals were completed in the Gulf
         Coast - Onshore region with an implied average reserve value of $1.21
         per mcfe of proved reserves and a 66% gas mix. The Enex Partnership's
         properties, which are considered to be in both regions, as of 10/01/98
         had a PV 10% value of $1.03 per mcfe ($14,140,000 / 13,740,000) and a
         65% gas mix. The 9/23/98 reserve report estimated a fair market value
         for the Enex Partnership's reserves of $0.76 per mcfe ($10,380,000 /
         13,740,000).


         If we applied a $0.87 per mcfe value to the Enex Partnership's proved 


                                       19
<PAGE>   20
         reserves of 13,740,000 mcfe, the result would be a reserve value of
         $12.8 million. This calculation is a further indication that the
         aforementioned reserve values estimates for the Enex Partnership were
         reasonable.


10.      Comparable Preferred Stocks

         We looked at six convertible preferred stocks in the energy sector and
         noted the following: The average yield for the six stocks as of 9/30/98
         was 8%, with a high of 12% and a low of 3%. The average conversion
         premium as of 9/30/98 was 51%, with a high of 166% and a low of -63%.

         We also looked at 16 convertible preferred stocks from other industries
         and noted the following: The average yield for the 16 stocks as of
         9/30/98 was 10%, with a high of 16% and a low of 6%. The average
         conversion premium as of 9/30/98 was 148%, with a high of 543% and a
         low of -92%. (See also Exhibits 3 and 4)

         The proposed 10% yield and the anticipated conversion premium of 42 -
         66% appear to be fair to the public Unitholders when compared to these
         publicly traded convertible preferred stocks. We would not expect an
         active trading market for the new Middle Bay Preferred to develop, but
         we nevertheless estimate that its fair market value would be in a range
         of $4.00 - $5.00 per share, which would involve a current yield of 10.0
         - 12.5% based upon a dividend of $0.50 per year.

11.      We noted that the adoption of the Proposal requires the consent of
         investors of the Enex Partnership holding 60% or greater of the Enex
         Partnership Units. The General Partner (which is a 79.2% majority-owned
         subsidiary of Middle Bay) owns 620,097 Units comprising 56.24% of the
         1,102,631 total Partnership Units. Thus, it is highly likely that the
         Exchange will be 


                                       20
<PAGE>   21
         approved.

12.      Each Unitholder does not have the option to decline the Exchange offer
         and to continue to hold Units. Unitholders who do not vote in favor of
         or who oppose the Proposal will have certain appraisal or dissenters'
         rights. Unitholders who elect to exercise their appraisal rights will
         have the option to receive cash in lieu of the Series C Preferred based
         on the liquidation value of the Enex Partnership's assets determined in
         accordance with the Gruy Report, as adjusted in accordance with the
         Partnership agreement. We understand from Middle Bay management that
         this cash value will be approximately $9.17 per Unit.

13.      We noted the following risks regarding the Proposal and regarding
         ownership of Middle Bay equity securities, as set forth in the Exchange
         offer document:

         Risks Regarding the Proposal

         -        Unitholders have received cash distributions from the Enex
                  partnership based on distributable cash generated from the
                  partnership's operations. After the Exchange, distributions to
                  former exchange, distributions to former Unitholders will be
                  in the form of cash dividends on the Series C Preferred
                  (approximately 10% per annum on the exchange value, payable
                  semi-annually).

         -        The exchange value of the partnership Units determined by
                  Middle Bay management is based on a fair market value
                  determination by an independent engineering firm employed by
                  the general partner; however, there is no assurance that the
                  exchange value reflects the value of the net assets of the
                  partnership if such were sold to an unaffiliated third party
                  or parties in an arm's-length transaction.



                                       21
<PAGE>   22
         -        Middle Bay, as controlling shareholder of the general partner,
                  may have a conflict of interest in the determination of the
                  exchange value.

         -        Determination of the exchange value by Middle Bay management
                  was based primarily on the estimated present value of the
                  partnership's proved oil and gas reserves, which involves many
                  uncertainties and could have resulted in an undervaluation of
                  partnership units.

         -        There is no assurance that the alternatives of continuing the
                  partnership or liquidating its assets would not be more
                  beneficial to Unitholders than the exchange offer.

         -        Investors that are not exempt from federal income tax on an
                  investment in the partnership are required to recognize gain
                  or loss on the exchange value received by them.

         -        No independent representative was engaged to represent the
                  unaffiliated investors in negotiating the terms of the
                  exchange offer, which, may be inferior to those that could
                  have been negotiated by an independent representative;
                  however, Middle Bay obtained an opinion as to the fairness of
                  the transaction to the Unitholders from us.

         Risks Regarding Ownership of Middle Bay Equity Securities

         -        Ownership of Middle Bay Series C Preferred may involve greater
                  risk than an investment in the Enex Partnership Units because
                  of Middle Bay's broader operations and its use of debt to
                  partially finance acquisitions.

         -        Future equity offerings by Middle Bay could potentially be
                  dilutive to the value of the Middle Bay common stock into
                  which the Series C Preferred is convertible.




                                       22
<PAGE>   23
         -        Middle Bay, as controlling shareholder of the general partner,
                  may have conflicts of interest in determining the terms of and
                  recommending acceptance of the proposal.


14.      Uncertainty of Oil and Gas Prices

         The price of natural gas in the Enex Partnership's area of operations
         has ranged from $1.65 per Mcf to $2.63 per Mcf during the past six
         months, according to Bloomberg's Mid-Continent Reported average. From a
         mid-point value of $2.14 per Mcf, the price of natural gas has thus
         fluctuated plus or minus roughly 23% during the past six months.

         The price of oil in the Enex Partnership's area of operations has
         ranged from $11.61 per Bbl to $16.23 per Bbl during the past six
         months, according to Bloomberg's Mid-Continent Reported average. From a
         mid-point value of $13.92 per Bbl, the price of oil has thus fluctuated
         plus or minus roughly 17% during the past six months.

         We noted that the Enex Partnership's revenues, operating results and
         future rate of growth are highly dependent upon the prices received for
         the Enex Partnership's natural gas and oil. Historically, the markets
         for natural gas and oil have been volatile and are likely to continue
         to be volatile in the future. Various factors beyond the control of the
         Enex Partnership will affect sales prices of its natural gas and oil,
         including worldwide and domestic supplies of natural gas and oil, the
         ability of the members of the Organization of Petroleum Exporting
         Countries to agree to and maintain oil price and production controls,
         political instability or armed conflict in oil-producing regions, the
         price and level of foreign imports, the level of consumer demand, the
         price and availability of alternative fuels, the availability of
         pipeline capacity, the availability and cost of drilling rigs, weather
         conditions, domestic and foreign governmental regulations and taxes,
         and the overall economic environment. It is impossible to predict
         future natural gas and oil price movements with certainty. Declines in


                                       23
<PAGE>   24
         natural gas and oil prices may materially adversely affect the Enex
         Partnership's business, financial condition and results of operations.
         Lower natural gas and oil prices also may reduce the amount of natural
         gas and oil that the Enex Partnership can produce economically. Any
         significant decline in the price of oil or natural gas would adversely
         affect the Enex Partnership's revenues and operating income and may
         require a reduction in the carrying value of the Enex Partnership's
         natural gas and oil properties. Any volatility in the value of the Enex
         Partnership creates comparable volatility in Middle Bay.

15.      Uncertainty of Oil and Gas Reserve Values

         Considering this volatility and our overall knowledge of the inherent
         uncertainties in (a) estimating future oil and gas production, and (b)
         in valuing oil and gas assets, we believe that an estimated fair market
         value for the Enex Partnership is only accurate within a range of plus
         or minus roughly 15%. Therefore, the fair market value per Unit of the
         Enex Partnership might reasonably range from roughly $9.04 to $12.22
         based upon an Exchange Value of $10.64 per Unit.




                                       24
<PAGE>   25
16.      Middle Bay's common shares are publicly traded on the Nasdaq Exchange
         under the symbol "MBOC" and have traded near $3.00 - $3.50 per share
         recently (See chart below.) The average closing price for MBOC in the
         past 30, 60, 90 and 120 days has generally been between $3.50 and
         $5.50.


                          MBOC DAILY PRICE AND VOLUME

                                    [GRAPH]

Historical prices provided by CSI, Inc.


Middle Bay Oil Company, Inc. (MBOC)

Daily prices (3/30/98 to 9/30/98)

<TABLE>
<CAPTION>
  DATE    VOLUME   HIGH     LOW    CLOSE
<S>       <C>      <C>      <C>    <C> 
 9/30/98    1,900    3.44    3.38    3.44
 9/29/98        -    3.44    3.44    3.44
 9/28/98    3,300    3.50    3.44    3.44
 9/25/98    1,500    3.50    3.50    3.50
 9/24/98   14,000    3.88    3.63    3.69
 9/23/98    5,000    3.88    3.69    3.69
 9/22/98    2,000    3.63    3.63    3.63
 9/21/98    1,500    3.63    3.50    3.63
 9/18/98    7,000    3.69    3.63    3.63
 9/17/98      100    3.50    3.50    3.50
 9/16/98    3,500    3.75    3.63    3.75
 9/15/98        -    3.63    3.63    3.63
 9/14/98    1,000    3.63    3.63    3.63
 9/11/98    4,000    3.63    3.50    3.63
 9/10/98        -    3.13    3.13    3.13
  9/9/98        -    3.13    3.13    3.13
  9/8/98    2,000    3.13    3.13    3.13
  9/7/98
  9/4/98      700    3.38    3.13    3.38
  9/3/98    1,000    3.38    3.38    3.38
  9/2/98      100    3.38    3.38    3.38
  9/1/98    1,500    3.38    3.38    3.38
 8/31/98        -    3.00    3.00    3.00
 8/28/98    3,500    3.50    3.00    3.00
 8/27/98        -    3.75    3.75    3.75
 8/26/98        -    3.75    3.75    3.75
 8/25/98        -    3.75    3.75    3.75
 8/24/98    4,000    3.75    3.75    3.75
 8/21/98   21,300    3.75    3.75    3.75
 8/20/98    2,400    4.38    3.75    3.88
 8/19/98      200    4.00    4.00    4.00
 8/18/98    4,300    4.38    4.13    4.13
 8/17/98   17,900    4.75    4.00    4.25
 8/14/98    5,400    4.00    3.88    3.88
 8/13/98   40,300    4.00    3.88    4.00
 8/12/98   15,700    4.00    3.88    3.88
 8/11/98      500    3.94    3.94    3.94
 8/10/98    5,000    3.94    3.88    3.94
  8/7/98   71,000    4.13    3.94    4.00
  8/6/98        -    4.13    4.13    4.13
  8/5/98   27,300    4.50    3.63    4.13
  8/4/98      500    5.00    5.00    5.00
  8/3/98        -    5.13    5.13    5.13
 7/31/98    1,700    5.13    5.13    5.13
 7/30/98    2,500    5.13    5.00    5.13
 7/29/98        -    4.75    4.75    4.75
 7/28/98      500    4.75    4.75    4.75
 7/27/98        -    4.63    4.63    4.63
 7/24/98    1,900    4.63    4.63    4.63
 7/23/98    7,300    5.00    4.88    4.88
 7/22/98        -    4.88    4.88    4.88
 7/21/98    3,400    4.88    4.88    4.88
 7/20/98        -    4.88    4.88    4.88
 7/17/98        -    4.88    4.88    4.88
 7/16/98        -    4.88    4.88    4.88
 7/15/98    2,000    4.88    4.88    4.88
 7/14/98      900    4.88    4.88    4.88
 7/13/98    1,200    4.88    4.88    4.88
 7/10/98        -    5.00    5.00    5.00
  7/9/98        -    5.00    5.00    5.00
  7/8/98    1,200    5.00    5.00    5.00
  7/7/98    1,700    4.94    4.94    4.94
  7/6/98        -    5.00    5.00    5.00
  7/3/98
  7/2/98    1,000    5.00    5.00    5.00
  7/1/98      500    5.00    5.00    5.00
 6/30/98    1,500    5.25    5.13    5.13
 6/29/98      100    5.25    5.25    5.25
 6/26/98    1,200    5.25    5.25    5.25
 6/25/98      200    5.25    5.25    5.25
 6/24/98        -    5.69    5.69    5.69
 6/23/98   14,000    6.00    5.36    5.69
 6/22/98    5,400    6.00    5.75    6.00
 6/19/98        -    5.88    5.88    5.88
 6/18/98        -    5.88    5.88    5.88
 6/17/98    1,600    6.00    5.88    5.88
 6/16/98        -    6.38    6.38    6.38
 6/15/98        -    6.38    6.38    6.38
 6/12/98    3,000    6.50    6.38    6.38
 6/11/98      200    6.63    6.63    6.63
 6/10/98    3,500    7.00    6.75    7.00
  6/9/98      300    7.00    7.00    7.00
  6/8/98    2,300    7.13    7.00    7.13
  6/5/98        -    7.63    7.63    7.63
  6/4/98        -    7.63    7.63    7.63
  6/3/98        -    7.63    7.63    7.63
  6/2/98        -    7.63    7.63    7.63
  6/1/98    2,100    7.63    7.13    7.63
 5/29/98        -    7.50    7.50    7.50
 5/28/98        -    7.50    7.50    7.50
 5/27/98        -    7.50    7.50    7.50
 5/26/98        -    7.50    7.50    7.50
 5/25/98
 5/22/98      500    7.50    7.50    7.50
 5/21/98    2,500    7.63    7.25    7.38
 5/20/98      500    7.25    7.25    7.25
 5/19/98        -    7.38    7.38    7.38
 5/18/98        -    7.38    7.38    7.38
 5/15/98      200    7.38    7.38    7.38
 5/14/98    1,200    7.75    7.75    7.75
 5/13/98      100    7.75    7.75    7.75
 5/12/98    2,300    7.75    7.38    7.75
 5/11/98      100    7.50    7.50    7.50
  5/8/98    3,700    7.75    7.38    7.75
  5/7/98    5,600    7.88    7.63    7.88
  5/6/98        -    7.88    7.88    7.88
  5/5/98        -    7.88    7.88    7.88
  5/4/98        -    7.88    7.88    7.88
  5/1/98        -    7.88    7.88    7.88
 4/30/98    3,500    7.88    7.75    7.88
 4/29/98      400    7.75    7.75    7.75
 4/28/98        -    8.00    8.00    8.00
 4/27/98      500    8.00    8.00    8.00
 4/24/98      500    7.75    7.75    7.75
 4/23/98    9,000    8.00    7.75    8.00
 4/22/98        -    7.63    7.63    7.63
 4/21/98      100    7.63    7.63    7.63
 4/20/98      100    7.63    7.63    7.63
 4/17/98        -    7.63    7.63    7.63
 4/16/98        -    7.63    7.63    7.63
 4/15/98        -    7.63    7.63    7.63
 4/14/98        -    7.63    7.63    7.63
 4/13/98        -    7.63    7.63    7.63
 4/10/98
  4/9/98      500    7.63    7.63    7.63
  4/8/98      400    7.63    7.63    7.63
  4/7/98      400    7.63    7.63    7.63
  4/6/98        -    8.00    8.00    8.00
  4/3/98        -    8.00    8.00    8.00
  4/2/98      700    8.00    8.00    8.00
  4/1/98      200    7.50    7.50    7.50
 3/31/98   15,600    8.25    7.75    7.75
 3/30/98    1,300    8.00    7.50    7.50
</TABLE>

<TABLE>
<CAPTION>
     9/30/98               7 days            30 days             60 days              90 days            120 days
Price      Volume     Price    Volume    Price    Volume     Price    Volume      Price    Volume    Price    Volume
<S>        <C>        <C>      <C>       <C>      <C>        <C>      <C>         <C>      <C>       <C>      <C>  
 3.44       1,900      3.55     3,957     3.51     2,803      4.05     4,929       4.77     3,757     5.49     3,089
</TABLE>


         As the table below indicates and because Middle Bay's stock is
         thinly-traded, not widely held by institutional investors and not
         widely followed by research analysts, we consider the Middle Bay market
         price to be somewhat inefficient.

<TABLE>
<CAPTION>
                                                    AVERAGE DAILY                  AVERAGE DAILY
                                                     STOCK PRICE                  VOLUME (SHARES)
<S>                                                 <C>                           <C>  
9/30/98                                                 $3.44                          1,900
Prior 7  days of trading                                 3.55                          3,957
Prior 30 days of trading                                 3.51                          2,803
Prior 60 days of trading                                 4.05                          4,929
Prior 90 days of trading                                 4.77                          3,757
Prior 120 days of trading                                5.49                          3,089
</TABLE>


                                       25
<PAGE>   26
17.      We discussed with management of the Enex Partnership whether any
         material changes in the affairs and values of the Enex Partnership had
         taken place since 6/30/98, and management of the Enex Partnership
         confirmed that no material changes had occurred.

18.      Other reasons for the Exchange being fair and in the best interest of
         the Enex Partnership's Unitholders included the following:

         (a)      the greater number and diversity of properties of Middle Bay
                  resulting from the Exchange;

         (b)      the predictable income stream of the Series C Preferred Stock;
   
         (c)      the priority of the liquidation preference of the Series C
                  Preferred Stock 


                                       26
<PAGE>   27
                  with respect to the Middle Bay common stock;

         (d)      the potential capital appreciation of the Middle Bay common
                  stock underlying the Series C Preferred Stock;

         (e)      the possibility for a more liquid security through a potential
                  thin trading market for the Series C Preferred Stock (there is
                  no market for the Units).

19.      We discussed the nature of the Enex Partnership's reserves with the
         Company's outside engineer, H.J. Gruy & Associates. We noted the
         following comments from the author of the H.J. Gruy report concerning
         the risk and quality of the reserves:

         a)       He said there is a very low risk level for the estimated
                  future production of proved developed producing reserves.

         b)       The value is concentrated in proved producing properties,
                  which have been producing for over 10 years.
  
         c)       The production lives of most of these properties are
                  short-lived.

         d)       The properties might not be very attractive to many potential
                  buyers because they are so short-lived and because they are
                  small interests in hundreds of wells in a wide range of
                  locations.

         e)       Neither Middle Bay nor the Enex Partnership is the operator of
                  the vast majority of the properties (buyers prefer to purchase
                  properties where the buyer will become the operator).

20.      Comparable Company Analysis 
         Based on publicly available information, we compared multiples of
         certain financial criteria (based on 9/30/98 market prices) for
         somewhat comparable companies to the Enex Partnership, as shown in
         Exhibit 5. We reviewed five somewhat comparable public exploration and
         production companies and noted the three key ratios shown on the
         summary page of Exhibit 5. None of this analysis, however, was nearly
         as important as the H.J. Gruy reserve report in estimating the fair
         market


                                       27
<PAGE>   28
         value of the Enex Partnership.

         As shown in the table below, normal ratio ranges for these comparable
         public companies indicate an overall range of implied values for 100%
         of the Enex Partnership's total capitalization from a low of $8.3
         million to a high of $22.5 million. We narrowed the range by focusing
         on the mean range of implied values for 100% of the Enex Partnership's
         total capitalization of $11.6 - $16.3 million (the mean values, as
         shown in Exhibit 5, were a) Market Value of Capitalization / EBITDX,
         $16.3 million; b) Market Value of Capitalization / Pre Tax SEC PV 10%,
         $16.1 million and c) Market Value of Capitalization per Mcfe, $11.6
         million). After deducting $0.0 million of debt in the Enex Partnership,
         the mean range of implied value for 100% of the Enex Partnership's
         equity was $11.6 - $16.3 million or $10.54 - $14.78 per Unit.

         Key Normal Comparable Company Ratios

<TABLE>
<CAPTION>
                                                                     High             Low          Average
                                                                     ----             ---          -------
<S>                                                                 <C>             <C>            <C>  
Market Value of Capitalization to:
     Pre Tax SEC PV 10%                                               130%             86%             111%
     Market Value of Capitalization to EBITDX                         8.8x            4.1x             6.4x
Market Value per MCFE                                               $1.06           $0.60            $0.85
</TABLE>


         Note: data points deemed to be outside of a reasonable range have been
         excluded

         The normal ratio ranges for these comparable public companies indicate
         an overall range of implied values for 100% of Middle Bay's total
         capitalization from a low of $22.3 million to a high of $79.7 million.
         We narrowed the range by focusing on the mean range of implied values
         for 100% of Middle Bay's total capitalization of $34.6 - $63.4 million
         (the mean values, as shown in Exhibit 5, were a) Market Value of
         Capitalization / EBITDX, $34.6 million; b) Market Value of
         Capitalization / Pre Tax SEC PV 10%, $49.6 million and c) Market Value



                                       28
<PAGE>   29
         of Capitalization per Mcfe, $63.4 million). After deducting $27.5
         million of debt in Middle Bay as of 9/30/98, the mean range of implied
         value for 100% of Middle Bay's equity was $7.1 - $35.9 million or $0.84
         - $4.21 per share.

         This range is so wide that it is not particularly useful. We assume
         that the recent stock market price for Middle Bay's common stock is a
         much better and reasonably accurate indicator of the stock's fair
         market value.

21.      Our review included audited financial statements of the Enex
         Partnership prepared by Deloitte & Touche, L.L.P. The financial
         statements were found by the auditor to present fairly, in all material
         aspects, the results of operations and cash flows for the company. As
         noted at the outset of this memo, we have assumed the accuracy and
         completeness of all financial and other information provided to us.

22.      In the context of HWG's fairness opinion for the Enex Partnership,
         "fair" would seem to be comparable to "reasonable," "just" and
         "equitable" as those words apply to a business transaction. These
         adjectives imply that the transaction shows little or no evidence of
         favoritism, bias, undue pressure or lack of objective, informed
         negotiating between the parties involved. "Fair" involves not only what
         is legal and ethical, but also what is in the best interest of all
         parties involved.

         "Fair" is not, however, synonymous with "the best possible," especially
         in the context of a merger, acquisition or other financial transaction.
         "Fair" recognizes that if ten experts were asked to suggest a "fair
         market value" for a normal company, ten different values would probably
         result. If each expert was well-informed and unbiased, the entire range
         of values might be considered "fair" prices for selling or merging the
         Company, but only one value would be the "best."



                                       29
<PAGE>   30








                                   EXHIBIT 1



                     H.J. GRUY RESERVE REPORT AS OF 10/1/98

<PAGE>   31
                  [H.J. GRUY AND ASSOCIATES, INC. LETTERHEAD]



                               September 23, 1998


Middle Bay Oil Company, Inc.
1221 Lamar, Suite 1020
Houston, Texas 77339


                                        ESTIMATED FAIR MARKET VALUE
                                        ENEX CONSOLIDATED PARTNERS, L.P.
                                        98-292-102


Gentlemen:

At your request, we have estimated the net reserves, the future net cash flow, 
the discounted net cash flow, the liquidation value, and the fair market value 
as of October 1, 1998, for the partnership entitled Enex Consolidated Partners, 
L.P., the general partner of which is Enex Resources Corporation (Enex). Middle 
Bay Oil Company, Inc. (Middle Bay) owns a majority interest in Enex. Our 
engagement and the appraisal performed thereunder is for the benefit of the 
partnership and its partners.

The estimated net reserves, future net cash flow, and discounted net cash flow 
as of October 1, 1998, are summarized by reserve category as follows:

<TABLE>
<CAPTION>
                                                                      Estimated
                                        Estimated               Future Net Cash Flow
                                       Net Reserves                  (Escalated)
                                ------------------------     -----------------------------
                                  Oil &                                        Discounted
                                Condensate        Gas                            at 10%
                                 (Barrels)       (Mcf)       Nondiscounted      Per Year
                                ----------     ---------     -------------     -----------
<S>                             <C>            <C>           <C>               <C>
Proved Developed Producing        780,696      6,543,086      $21,234,520      $11,831,910

Proved Developed Nonproducing      16,520      2,414,782      $ 6,354,743      $ 2,309,049
                                  -------      ---------      -----------      -----------
TOTAL PROVED                      797,216      8,957,868      $27,589,263      $14,140,959

Probable                           15,771        691,548      $ 1,261,299      $   627,724

Possible                            1,249        178,500      $   479,406      $   311,624

</TABLE>

The estimated fair market value of the partnership is $10,380,000.

<PAGE>   32
Middle Bay Oil Company, Inc.          -2-                    September 23, 1998


FAIR MARKET VALUE AS USED HEREIN IS THE PRICE THAT A WILLING BUYER WILL PAY AND 
A WILLING SELLER WILL ACCEPT AT A GIVEN POINT IN TIME, WITH NEITHER THE BUYER 
NOR THE SELLER UNDER ANY COMPULSION TO BUY OR SELL, AND BOTH HAVING REASONABLE 
KNOWLEDGE OF ALL THE MATERIAL CIRCUMSTANCES.

To estimate the fair market value attributable to the proved developed 
producing reserves, the 10 percent discounted future net cash flow was adjusted 
to reflect the impact of federal income tax. The internal rate of return and 
payout time were computed for this quantity and compared with those at which 
current acquisitions are completed. Suitable adjustments were then made to 
correspond to these two financial indices. Proved developed nonproducing 
reserves are treated similarly except that an additional adjustment is made 
for the capital expenditure. For probable and possible reserves, the capital is 
added to the discounted net cash flow, then multiplied by a suitable factor to 
account for category risk and the capital then subtracted. This has the 
effect that capital is spent with certainty and the operating cash income is 
burdened with the risk. Internal rate of return and payout time are calculated 
for each to establish reasonableness based upon the risk associated with the 
reserve category.

The estimated future net cash flow is that cash flow which will be realized 
from the sale of the estimated net production after deduction of royalties, ad 
valorem and production taxes, direct operating costs, and capital expenditures, 
when applicable. Surface and well equipment salvage values, and well plugging 
and field abandonment costs have not been considered in the cash flow 
projections. Future net cash flow as stated in this report is before the 
deduction of federal or state income tax.

The following parameters are incorporated in the economic projections 
referenced in this report. Base oil, natural gas, and natural gas liquids 
prices are shown in Table I. These prices are the average NYMEX prices for oil 
and natural gas for the years 1998 through 2000. After the year 2000, prices 
are escalated at an annual rate of 2.5 percent until the primary product 
reaches its maximum. Oil and condensate prices are adjusted for gravity and 
transportation charges and natural gas prices are adjusted for BTU content and 
transportation. Operating expenses are escalated at an annual rate of 2.5 
percent until the primary product reaches its maximum value. The actual prices 
that will be received and the associated costs may be more or less than those 
projected.

The liquidation value of the partnership was estimated to be $8,861,000. This 
estimate assumes the orderly liquidation of partnership assets over a 12 month 
period. In connection therewith, it is assumed that the partnership would incur 
a total of $1,000,000 in general and administrative fees and approximately five 
percent for third party expenses including broker fees, legal and land fees, 
printing costs, and miscellaneous expenses.

For those wells with sufficient production history, reserve estimates and rate 
projections are based on the extrapolation of established performance trends. 
Reserves for other producing and nonproducing properties have been estimated 
from volumetric calculations and analogy with the performance of comparable 
wells. The reserves referenced in this study are estimates only and


H.J. GRUY AND ASSOCIATES, INC.

           1200 Smith Street, Suite 3040, Houston, Texas 77002 - (713) 739-1000

<PAGE>   33
<TABLE>
<CAPTION>
                                    TABLE 1
                   ESTIMATED FAIR MARKET VALUE BY ACQUISITION
- -------------------------------------------------------------------------------
                                              DISCOUNTED              ESTIMATED
               RESERVES  TYPE OF   CASH FLOW  CASH FLOW    CAPITAL       FMV
ACQUISITION    CATEGORY  INTEREST     ($)        ($)         ($)         ($)
===============================================================================
<S>            <C>       <C>      <C>        <C>           <C>       <C> 
Arnold            PDP       WI      557,064    332,573        0        245,000
                  PDP      ORRI     472,070    271,483        0        210,000

     Subtotal                                                          455,000
- -------------------------------------------------------------------------------
Barnes            PDP       WI      330,264    281,638        0        217,000
                  PNP       WI      576,544    289,916      37,075     165,000

     Subtotal                                                          382,000
- -------------------------------------------------------------------------------     
Binger            PDP       WI         0          0           0           0
          
     Subtotal                                                             0
- -------------------------------------------------------------------------------
Charlotte         PDP       WI         0          0           0           0
     
     Subtotal                                                             0
- -------------------------------------------------------------------------------
Choate            PDP       WI       43,127     29,264        0         21,000
     
     Subtotal                                                           21,000
- -------------------------------------------------------------------------------
Concord           PDP       WI      967,419    737,435        0        600,000
                  PDP      ORRI   4,496,919  2,260,436        0      1,763,000
                  PNP       WI       46,175     36,724       76         24,000
     
     Subtotal                                                        2,387,000
- -------------------------------------------------------------------------------
Deal              PDP      ORRI     212,602    100,083        0         70,000

     Subtotal                                                           70,000
- -------------------------------------------------------------------------------
Dent              PDP       WI      463,654    346,134        0        280,000
                  PDP      ORRI      10,400      8,526        0          6,800
                  PNP       WI      573,641    265,282      23,498     150,000
          
     Subtotal                                                          436,800
- -------------------------------------------------------------------------------

<CAPTION>
                                    TABLE 1
                   ESTIMATED FAIR MARKET VALUE BY ACQUISITION
- -------------------------------------------------------------------------------
                                             PAYOUT
                    ADJUSTMENT     IRR        TIME                   
ACQUISITION           FACTOR       (%)        (YRS)        COMMENTS
===============================================================================
<S>                 <C>           <C>        <C>      <C>     
Arnold                 0.74       19.7         4.1           
                       0.77       17.5         4.6    Long life (34 yrs)             

     Subtotal
- -------------------------------------------------------------------------------
Barnes                 0.77       31.0         2.1    Short life (8.5 yrs)        
                       0.57       19.4         5.8    Two behind pipe 2003/2007  

     Subtotal
- -------------------------------------------------------------------------------
Binger                  --         --          --     No economic production   

     Subtotal
- -------------------------------------------------------------------------------
Charlotte               --         --          --     No economic production 

     Subtotal
- -------------------------------------------------------------------------------
Choate                 0.72       22.0         3.8    Life = 14 yrs

     Subtotal
- -------------------------------------------------------------------------------
Concord                0.81       21.1         3.0   
                       0.78       16.5         4.9    Long life reserves
                       0.65       32.1         2.3    Short life (7.7 yrs)    

     Subtotal
- -------------------------------------------------------------------------------
Deal                   0.70       18.3         5.1    Long life reserves

     Subtotal
- -------------------------------------------------------------------------------
Dent                   0.81       20.6         3.3
                       0.80       24.2         2.9    Short life (5.9 yrs)
                       0.57       23.1         3.8

     Subtotal
- -------------------------------------------------------------------------------
</TABLE>
<PAGE>   34
<TABLE>
<CAPTION>

                                    TABLE I
                   ESTIMATED FAIR MARKET VALUE BY ACQUISITION

- ------------------------------------------------------------------------------------------------------------------------------------
   ACQUISITION   RESERVES  TYPE OF   CASH FLOW  DISCOUNTED  CAPITAL  ESTIMATED  ADJUSTMENT  IRR   PAYOUT          COMMENTS
                 CATEGORY  INTEREST             CASH FLOW               FMV       FACTOR           TIME
                                        ($)        ($)        ($)       ($)                  %     (YRS)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>       <C>        <C>         <C>      <C>        <C>         <C>   <C>      <C>
East Cameron       PDP      ORRI       54,308     43,699       0       32,000       0.73    29.7    2.4    Short lived production
                                                                                                           (7.1 yrs)
                   PRB      ORRI      440,997    326,006       0      124,000       0.38    66.2    1.9    Short lived production
                                                                                                           (8.8 yrs)
  Subtotal                                                            156,000
- ------------------------------------------------------------------------------------------------------------------------------------
Esperance          PDP      ORRI        4,100      3,900       0         0           -        -      -
  Subtotal                                                               0
- ------------------------------------------------------------------------------------------------------------------------------------
          
FEC                PDP       WI       476,427    347,507       0      260,000       0.75    22.8    3.4   
                   PNP       WI     1,076,029    383,758    26,824    110,000       0.29    27.7    5.1    Multiple behind pipe
                                                                                                           reserves
  Subtotal                                                            370,000
- ------------------------------------------------------------------------------------------------------------------------------------
HNG               PDP      ORRI     3,244,389  1,817,921       0    1,418,000       0.78    16.8    4.9
  Subtotal                                                          1,418,000
- ------------------------------------------------------------------------------------------------------------------------------------
Lake Cocodrie     PDP       WI         64,069     52,134       0       36,000       0.69    34.7    2.3    Short lived production
                                                                                                           (6-8 yrs)
  Subtotal                                                             36,000
- ------------------------------------------------------------------------------------------------------------------------------------
Larto Lake        PDP       WI          6,774      6,151       0        4,900       0.80    40.0    1.4    Short lived production
                                                                                                           (3.0 yrs)
  Subtotal                                                              4,900
- ------------------------------------------------------------------------------------------------------------------------------------
Michigan          PDP       WI        193,086    160,958       0      135,000       0.84    24.2    2.1     Little cash flow after
                                                                                                            3.5 yrs
  Subtotal                                                            135,000
- ------------------------------------------------------------------------------------------------------------------------------------
Midway            PDP       WI      1,301,022    660,002       0      475,000       0.72    18.2    5.0     Long life reserves
                  PNP       WI         90,507      5,895    24,956       0            -      -       -
  Subtotal                                                            475,000
- ------------------------------------------------------------------------------------------------------------------------------------
Muldoon           PDP       WI      1,035,384    626,889       0      460,000       0.73    19.1    4.4
  Subtotal                                                            460,000
- ------------------------------------------------------------------------------------------------------------------------------------
Pecan Island      PDP      ORRI       130,384    110,554       0       87,000       0.79    29.3    2.2    Short lived production
                                                                                                           (6.7 yrs)
                  PNP      ORRI     1,083,929    485,928       0      260,000       0.54    20.1    6.3    Three behind pipe 
                                                                                                           reservoirs
  Subtotal                                                            347,000
- ------------------------------------------------------------------------------------------------------------------------------------
RIC               PDP       WI        325,544    196,825       0      140,000       0.71    20.8    4.0    Long life reserves
  Subtotal                                                            140,000
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE> 
<PAGE>   35
                                    TABLE I
                   ESTIMATED FAIR MARKET VALUE BY ACQUISITION


<TABLE>
<CAPTION>


                RESERVES   TYPE OF                 DISCOUNTED            ESTIMATED  ADJUSTMENT         PAYOUT
ACQUISITION     CATEGORY  INTEREST    CASH FLOW     CASH FLOW   CAPITAL     FMV       FACTOR     IRR    TIME        COMMENTS
                                         ($)           ($)        ($)       ($)                  (%)    (YRS)
- -----------------------------------------------------------------------------------------------------------------------------------
<S>            <C>        <C>        <C>           <C>          <C>      <C>        <C>         <C>    <C>     <C>
Second Bayou      PDP      ORRI       655,465       477,693        0      410,000      0.86     16.4     4.0
                  PNP      0RRI      1,414,213      283,228        0       50,000      0.18     23.9    10.2    Behind pipe on 
                                                                                                                 production in 2007
                  PRB      ORRI       109,978        5,015         0         0          --       --      --     Production beings 
                                                                                                                 beyond 2012
                  POS      ORRI       479,406       311,624        0       50,000      0.16     >100.0   0.8
    Subtotal                                                               510,000
- -----------------------------------------------------------------------------------------------------------------------------------
Seven Sisters,
  E               PDP      ORRI      1,058,522      635,116        0      510,000      0.80     16.1      5.1
                  PNP      ORRI      1,493,702      558,318        0      350,000      0.63     16.8      6.2
    Subtotal                                                              860,000
- -----------------------------------------------------------------------------------------------------------------------------------
Shana             PDP        WI        81,986       71,455         0       53,000      0.74     39.1      1.8   Short life
                                                                                                                  (4.8 years)
    Subtotal                                                               53,000
- -----------------------------------------------------------------------------------------------------------------------------------
Shelf             PDP        WI       150,544      116,369         0       87,000      0.75     24.8      3.0   Short lived 
                                                                                                                  production
                                                                                                                  (11 years)
    Subtotal                                                               87,000
- -----------------------------------------------------------------------------------------------------------------------------------
Speary            PDP        WI       239,654      187,693         0      140,000      0.75     26.1      2.9   Short lived 
                                                                                                                   production
                                                                                                                   (8.9 years)
                  PRB        WI       710,324      296,703      116,991   86,000       0.29     39.8      2.2
    Subtotal                                                             226,000
- -----------------------------------------------------------------------------------------------------------------------------------
Wardner Ranch     PDP      ORRI     4,659,388    1,950,781         0    1,350,000      0.69     17.4      5.6
    Subtotal                                                            1,350,000 
- -----------------------------------------------------------------------------------------------------------------------------------
GRAND TOTAL                                                            10,379,700
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

<PAGE>   36

                                   EXHIBIT 2

              RESERVE CALCULATIONS BASED ON SEC CASE AS OF 10/1/98
<PAGE>   37
                        ENEX CONSOLIDATED PARTNERS, L.P.
TOTAL PROVED                                             DATE        : 10/01/98
TOTAL ALL ACQUISITIONS                                   TIME        : 15:51:19
                                                         DBS FILE    : MIDDLE
                                                         SETUP FILE  : MIDDLE
                                                         SEQ NUMBER  : *****

                  R E S E R V E S   A N D   E C O N O M I C S

                             EFFECTIVE DATE: 10/98

<TABLE>
<CAPTION>
- -END-    NUMBER      GROSS OIL     GROSS GAS      NET OIL     NET GAS     NET OIL     NET GAS     NET         NET
MO-YR  GROSS WELLS  PRODUCTION    PRODUCTION     PRODUCTION  PRODUCTION    PRICE       PRICE    OIL SALES   GAS SALES
- -----  -----------  ----MBBLS---  ----MMCF----   --MBBLS---  ---MMCF---  --$/BBL--   --$/MCF--  ----MS---   ---MS----
<S>    <C>          <C>           <C>            <C>         <C>         <C>         <C>        <C>         <C>

12-98        598.1   19640.260       46400.530       33.544     256.432     13.589       2.001    455.818     513.124    

12-99        587.5   74548.720      198311.500      118.798     901.852     13.573       2.002    1612.390   1805.321
12-00        568.8   65964.160      189676.500       98.437     801.136     13.564       2.002    1335.220   1604.035
12-01        552.7   59027.870      158595.000       85.797     693.611     13.562       2.004    1163.614   1390.145
12-02        523.4   53495.970      131629.300       73.300     636.896     13.529       1.996     991.664   1271.094
12-03        465.6   47684.860      111401.500       49.691     576.908     13.388       1.988     665.248   1146.819

12-04        411.7   42811.900       96951.890       38.611     609.428     13.365       1.970     515.266   1200.484
12-05        394.1   38894.360       86502.820       30.805     434.908     13.355       2.003     411.414    871.186
12-06        371.8   35138.870       77522.390       25.727     380.953     13.471       2.010     346.571    765.811
12-07        344.0   31782.120       71239.820       23.112     401.529     13.459       1.993     311.067    800.289
12-08        322.8   23203.730       66043.010       17.324     331.480     13.488       2.011     233.670    666.480

12-09        297.5   20123.730       61104.250       14.541     288.584     13.537       2.019     196.836    582.560
12-10        273.3   18501.460       57679.080       12.789     308.588     13.556       2.012     173.372    620.767
12-11        247.7   16926.090       53938.700       11.423     314.464     13.535       2.015     154.601    633.673
12-12        233.0   15587.950       49244.370       10.232     260.606     13.486       2.014     137.992    524.748

$ TOT        403.1  563332.000     1456241.000      644.130    7197.375     13.514       2.000    8704.742  14396.540

AFTER         65.2  134421.700      479040.500       72.061    1668.011     13.525       2.003     974.610   3341.285

TOTAL        185.6  697753.700     1935251.000      716.191    8865.385     13.515       2.001    9679.352  17737.820
</TABLE>

<TABLE>
- -END-     TOTAL        NET         PRODUCTION   DIRECT OPER    CAPITAL   FUTURE NET   CUMULATIVE   10.0% CLM 
MO-YR   NET SALES   AD VALOREM       TAXES        EXPENSE       COSTS     CASHFLOW     CASHFLOW     DISC CP
- -----   ---MS----   ----MS----     ----MS----   ----MS-----    ---MS--   ----MS----   ----MS----   ---MS----
<S>     <C>         <C>            <C>           <C>           <C>       <C>          <C>          <C>
12-98     983.756       20.084         58.433       242.943       .000      662.297      662.297     654.453

12-99    3473.756       72.564        203.979       850.170      3.008      2314.035    2976.332    2808.912
12-00    2990.537       63.351        175.345       740.444      5.868      2005.529    4981.861    4506.425
12-01    2600.737       54.771        151.050       681.780       .000      1713.137    6654.998    5826.820
12-02    2305.842       47.379        135.235       619.683      8.332      1495.213    8190.210    6870.864
12-03    1851.625       36.808        112.110       411.123     27.250      1264.344    9454.554    7675.535

12-04    1752.110       36.840        110.759       314.890       .000      1289.620   10744.170    8421.141
12-05    1316.056       26.306         79.870       254.531       .000       955.349   11699.520    8923.455
12-06    1143.197       23.266         68.676       215.703      8.130       827.421   12526.940    9319.092
12-07    1139.767       23.395         67.869       175.299       .000       873.204   13400.150    9698.504
12-08     926.369       16.802         54.741       112.570     10.392       731.864   14132.010    9987.627

12-09     798.026       15.196         47.558        87.142       .000       648.130   16780.140   10220.350
12-10     811.641       15.400         49.257        71.323      3.044       672.617   15452.760   10439.870
12-11     804.716       13.351         48.931        59.942       .000       682.492   16135.250   10642.350
12-12     678.187       11.815         41.885        56.423       .000       568.393   16703.640   10795.640

$ TOT   23576.320      477.329       1405.368      4923.956     66.024     16703.640   16703.640   10795.650

AFTER    4459.444       88.514        277.254       442.880     19.346      3631.451   20335.100   11394.100

TOTAL   28035.760      565.842       1682.622      5366.835     85.370     20325.100   20335.100   11394.100
</TABLE>

<TABLE>
<CAPTION>
                          OIL          GAS                                                    P.W. %   P.W., M$
                      -----------   -----------                                               ------   ---------
<S>                   <C>           <C>            <C>                        <C>             <C>      <C>
GROSS WELLS               583.0         488.0      LIFE, YRS.                  40.00            5.00   14568.130
GROSS ULT., MB & MMF  6588552.000   8962843.000    DISCOUNT %                  10.00           10.00   11394.330
GROSS CUM., MB & MMF  5890799.000   7027561.000    UNDISCOUNTED PAYOUT, YRS.     .00           15.00    9426.452
GROSS RES., MB & MMF   697752.700   1935281.000    DISCOUNTED PAYOUT, YRS.       .00           20.00    8095.114
NET RES.,  MB & MMF       716.191      8865.384    UNDISCOUNTED NET/INVEST.   239.20           25.00    7135.129
NET REVENUE, MS          9679.355     17737.820    DISCOUNTED NET/INVEST.     271.45           30.00    6409.203
INITIAL PRICE, $           13.914         1.882    RATE-OF-RETURN, PCT.       100.00           40.00    5380.822
INITIAL N.I., PCT.           .257         1,029    INITIAL W.I., PCT.           .399           60.00    4177.248
                                                                                               80.00    3486.560
                                                                                              100.00    3034.039
</TABLE>
<PAGE>   38
TOTAL PROVED PRODUCING                                    DATE      :   10/01/98
TOTAL ALL ACQUISITIONS                                    TIME      :   16:51:11
                                                          DBS FILE  :   MIDDLE
                                                          SETUP FILE:   MIDDLE
                                                          SEQ NUMBER:   *****

                    R E S E R V E S  A N D  E C O N O M I C S

                             EFFECTIVE DATE:  10/98
<TABLE>
<CAPTION>
- -END-          MERGER     GROSS OIL      GROSS GAS      NET OIL        NET GAS      NET OIL        NET GAS
MO. YR      GROSS WELLS   PRODUCTION     PRODUCTION    PRODUCTION     PRODUCTION     PRICE          PRICE 
- ------      -----------  ----MBBLS----  ----MMCF----   ---MBBLS---   ----MMCF----  ---$/BBL---    ---$/MCF---
<S>             <C>      <C>           <C>             <C>            <C>            <C>            <C> 
12-98           598.1     19640.260      46400.530      33.544         256.432       13.589         2.001

12-99           586.2     74548.060     176439.100     116.777         888.490       13.573         2.003
12-00           564.2     65933.270     143737.500      98.149         718.035       13.558         2.007
12-01           547.7     58968.050     121777.500      85.285         607.608       13.548         2.005
12-02           517.2     53431.040     108912.800      72.350         513.775       13.512         2.004
12-03           458.5     47613.770      96958.240      48.305         429.480       13.363         2.006

12-04           403.7     42763.310      87512.650      37.008         367.085       13.326         2.009
12-05           386.4     38825.320      79066.690      29.942         327.887       13.295         2.007
12-06           364.0     35064.130      72181.320      24.831         291.269       13.397         2.008
12-07           335.1     31694.130      66184.320      21.646         240.711       13.381         2.014
12-08           314.6     23116.340      60985.210      16.091         214.504       13.377         2.012

12-09           290.4     20043.690      56330.670      13.668         190.597       13.412         2.012
12-10           266.6     18426.240      52243.000      11.955         167.730       13.418         2.013
12-11           239.7     16864.800      58064.690      10.537         146.831       13.396         2.010
12-12           225.0     15544.260      54901.000       9.558         133.083       13.372         2.008

S TOT           396.4    562482.600    1261755.000     631.645        5493.488       13.486         2.007

AFTER            61.4    134292.100     461588.300      68.050         960.557       13.502         1.992

TOTAL           180.8    696774.700    1723343.000     699.695        6454.045       13.488         2.005
</TABLE>

<TABLE>
<CAPTION>
               NET         NET
            OIL SALES    GAS SALES
            ----MS----  ----MS----
<S>          <C>        <C>
12-98         455.618     513.124

12-99        1612.114    1779.205
12-00        1330.687    1441.056
12-01        1155.392    1220.126
12-02         977.576    1029.743
12-03         645.516     861.289

12-04         493.180     737.395
12-05         398.093     658.146
12-06         332.657     584.958
12-07         289.651     484.692
12-08         215.243     431.634

12-09         183.316     383.563
12-10         160.413     337.628
12-11         141.150     295.181
12-12         127.813     267.185

S TOT        8518.618   11024.930

AFTER         918.828    1913.161

TOTAL        9437.446   12938.090
</TABLE>

<TABLE>
<CAPTION>
- -END-          TOTAL         NET         PRODUCTION    DIRECT OPER     CAPITAL     FUTURE NET     CUMULATIVE
MO. YR       NET SALES    AD VALOREN        TAXES       EXPENSE         COSTS       CASH FLOW      CASH FLOW
- ------      ----MS----    ----MS----     ----MS----   -----MS-----    ----MS----  -----MS-----    ----MS----
<S>          <C>          <C>           <C>              <C>              <C>      <C>            <C>
12-98           983.786     20.084        58.433          242.943         .000       662.297        662.297

12-99          3447.364     71.874       202.698          878.177         .000      2294.616       2956.913

12-00          2823.025     60.139       166.541          737.013         .000      1859.332       4816.244
12-01          2422.498     52.307       143.065          678.005         .000      1549.122       6365.365
12-02          2050.404     45.375       121.277          609.504         .000      1274.247       7639.613
12-03          1546.364     33.463        94.137          393.888         .000      1024.876       8664.489

12-04          1266.935     27.016        78.259          283.665         .000       877.995       9542.484
12-05          1089.695     23.839        66.805          237.306         .000       761.745      10304.230
12-06           948.429     21.483        58.220          199.587         .000       669.139      10973.370
12-07           802.754     18.128        49.044          144.655         .000       590.926      11564.290
12-08           673.097     15.185        41.923           88.384         .000       527.605      12091.900

12-09           585.509     13.477        36.995           72.807         .000       462.230      12554.130
12-10           515.542     12.136        32.644           62.275         .000       408.487      12962.620
12-11           452.703     11.018        28.871           51.469         .000       361.416      13324.030
12-12           410.444     10.148        26.242           47.950         .000       326.104      13650.140

S TOT         20018.590    435.671      1205.154         4727.625         .000     13650.140      13650.140

AFTER          2975.538     76.366       191.309          349.061         .000      2358.802      16008.540

TOTAL         22994.130    512.037      2396.463         5076.686         .000     16008.940      16008.940
</TABLE>

<TABLE>
<CAPTION>
- -END-        10.0% CUM
MO. YR        DISC CF
- ------       ----MS----
<S>            <C>
12-98           654.453

12-99          2790.902
12-00          4364.796
12-01          5556.783
12-02          6448.264
12-03          7100.117

12-04          7607.769
12-05          8008.132
12-06          8327.831
12-07          8584.510
12-08          8792.835

12-09          8958.816
12-10          9092.128
12-11          9199.355
12-12          9287.312

S TOT          9287.312

AFTER          9656.223

TOTAL          9658.223
</TABLE>

<TABLE>
<CAPTION>
                             OIL                GAS                                                         P.W. %        P.W.. MS
                          -----------        -----------                                                    -------       --------
<S>             <C>       <C>                <C>                  <C>                        <C>           <C>            <C>
GROSS WELLS                    583.0              461.0           LIFE, YRS.                  40.00          5.00         11951.900
GROSS ULT..     MS & MMF  6587573.000        8750904.000          DISCOUNT %                  10.00         10.00          9658.453
GROSS CUM.,     MS & MMF  5890799.000        7027561.000          UNDISCOUNTED PAYOUT. YRS.     .00         15.00          8191.398
GROSS RES..     MS & MMF   696774.700        1723343.000          DISCOUNTED PAYOUT. YRS.       .00         20.00          7168.500
NET RES..       MS & MMF      699.695           6454.045          UNDISCOUNTED NET/INVEST.      .00         25.00          6411.026
NET REVENUE.    MS           9437.446          12938.090          DISCOUNTED NET/INVEST.        .00         30.00          5325.145
INITIAL PRICE.  S             13.910              1.872           RATE-OF-RETURN, PCT.       100.00         40.00          4973.260
INITIAL N.I.,   PCT.             .247               .728          INITIAL W.I., PCT.           .317         60.00          3939.866
                                                                                                            80.00          3327.479
                                                                                                           100.00          2918.090
</TABLE>
<PAGE>   39
TOTAL PROVED NONPRODUCING                                 DATE       : 10/01/98
TOTAL ALL ACQUISITIONS                                    TIME       : 15:51:15
                                                          DBS FILE   : MIDDLE
                                                          SETUP FILE : MIDDLE
                                                          SEQ NUMBER : *****


                  R E S E R V E S   A N D   E C O N O M I C S

                             EFFECTIVE DATE: 10/96
<TABLE>
<CAPTION>
- -END-      NUMBER       GROSS OIL     GROSS GAS      NET OIL       NET GAS      NET OIL   NET GAS       NET           NET
MO-YR    GROSS WELLS    PRODUCTION    PRODUCTION    PRODUCTION    PRODUCTION     PRICE     PRICE     OIL SALES     GAS SALES
- -----    -----------    ---MBBLS--    ---MMCF---    ---MBBLS--    ---MMCF---    -$/BBL-   -$/MCF-    ----M$---     ----M$---
<S>      <C>            <C>           <C>           <C>           <C>           <C>       <C>        <C>           <C>
12-96        .0              .000           .000        .000           .000        .000     .000         .000          .000

12-99       1.3              .640      21872.470        .021         13.362      13.310    1.955         .276        26.116
12-00       4.6            30.890      45879.060        .288         83.101      15.736    1.961        4.533       162.979
12-01       5.0            59.820      36817.530        .513         86.002      16.036    1.977        8.221       170.027
12-02       6.2            64.930      22716.480        .950        123.121      14.823    1.960       14.088       241.350
12-03       7.2            65.096      14443.310       1.386        147.457      14.240    1.936       19.732       285.529

12-04       8.0            48.587       9439.239       1.603        242.343      13.778    1.911       22.085       463.089
12-05       7.8            69.042       7436.137        .863        107.022      15.435    1.991       13.321       213.040
12-06       7.8            74.737       5341.073        .895         89.684      15.542    2.017       13.914       180.854
12-07       8.9            87.990       5055.500       1.466        160.818      14.611    1.962       21.417       315.597
12-08       8.2            87.389       5057.804       1.234        116.976      14.935    2.008       18.427       234.846

12-09       7.1            80.040       4773.580        .872         97.897      15.500    2.031       13.520       198.997
12-10       6.8            75.219       5436.086        .834        140.859      15.535    2.010       12.960       283.139
12-11       6.0            61.282       5874.006        .886        167.633      15.188    2.019       13.451       338.492
12-12       6.0            63.796       4343.373        .674        127.523      15.094    2.020       10.181       257.562

$ TOT       6.6           849.458     194485.600      12.488       1703.887      14.908    1.979      186.125      3371.608

AFTER       4.5           129.582      17452.270       4.011        707.454      13.906    2.019       95.782      1428.124

TOTAL       5.6           979.040     211937.900      16.496       2411.341      14.664    1.990      241.907      4799.732
</TABLE>


<TABLE>
<CAPTION>
- -END-       TOTAL           NET        PRODUCTION      DIRECT OPER     CAPITAL     FUTURE NET      CUMULATIVE      10.0% CUM
MO-YR     NET SALES     AD VALOREM        TAXES          EXPENSE        COSTS       CASHFLOW        CASHFLOW        DISC CF
- -----     ----MS---     ----MS----     ----MS----      -----MS----     ---MS--     ----MS----      ----MS----      ----MS---
<S>       <C>           <C>            <C>             <C>             <C>         <C>             <C>             <C>
12-98         .000          .000            .000             .000         .000          .000            .000           .000

12-99       26.392          .691           1.281            1.993        3.008        19.419          19.419         18.010
12-00      167.512         3.212           8.804            3.430        5.868       146.197         165.617        141.628
12-01      178.239         2.464           7.985            3.775         .000       164.014         329.631        268.038
12-02      255.438         2.004          13.957           10.179        8.332       220.966         550.597        422.600
12-03      305.261         3.345          17.973           17.225       27.250       239.468         790.065        575.418

12-04      485.175         9.824          32.501           31.225         .000       411.625        1201.690        813.372
12-05      226.361         2.467          13.065           17.225         .000       193.604        1395.294        915.322
12-06      194.768         1.783          10.456           16.117        8.130       158.282        1553.576        991.260
12-07      337.014         5.267          18.824           30.645         .000       282.278        1835.854       1113.994
12-08      253.272         1.617          12.818           24.186       10.392       204.259        2040.213       1194.791

12-09      212.517         1.719          10.563           14.334         .000       185.900        2226.013       1261.536
12-10      296.099         3.265          16.613            9.046        3.044       266.129        2490.143       1347.741
12-11      351.943         2.333          20.060            8.473         .000       321.076        2811.219       1442.988
12-12      267.743         1.667          15.313            8.473         .000       242.289        3053.508       1508.329

$ TOT     3557.733        41.557         200.214          196.330       66.024      3053.508        3053.508       1508.329

AFTER     1483.907        12.148          85.945           93.818       19.346      1272.650        4326.156       1735.874

TOTAL     5041.639        53.806         286.158          290.149       85.370      4326.158        4326.156       1735.874
</TABLE>


<TABLE>
<CAPTION>
                           OIL        GAS                                                              P.W. %      P.W., M$
                           -------    ----------                                                       ------      --------
<S>                        <C>        <C>                        <C>                       <C>         <C>         <C>
GROSS WELLS                     .0          27.0                 LIFE, YRS.                 34.58        5.00      2616.235
GROSS ULT., MB & MMF       979.039    211937.900                 DISCOUNT %                 10.00       10.00      1735.874
GROSS COM., MB & MMF          .000          .000                 UNDISCOUNTED PAYOUT, YRS.    .38       15.00      1235.054
GROSS RES., MB & MMF       979.039    211937.900                 DISCOUNTED PAYOUT, YRS.      .39       20.00       926.614
NET RES.,   MB & MMF        16.496      2411.361                 UNDISCOUNTED NET/INVEST.   51.68       25.00       724.105
NET REVENUE, M$            241.907      4799.731                 DISCOUNTED NET/INVEST.     42.20       30.00       584.058
INITIAL PRICE, $            15.628         1.914                 RATE-OF-RETURN, PCT.      100.00       40.00       407.561
INITIAL N.I., PCT.           4.151         1.957                 INITIAL W.I., PCT.         1.404       60.00       237.382
                                                                                                        80.00       159.080
                                                                                                       100.00       115.948
</TABLE>

<PAGE>   40
                                   EXHIBIT 3



            COMPARABLE CONVERTIBLE PREFERRED STOCKS - ENERGY RELATED
<PAGE>   41
<TABLE>
<CAPTION>

            COMPARABLE CONVERTIBLE PREFERRED STOCKS - ENERGY RELATED

                             PRICE      9/30/98       ANNUAL             S&P      CONVERSION       9/30/98      CONVERSION
     NAME         TICKER   AT ISSUE   PRICE OF PFD   PFD DIV.   YIELD   RATING   PRICE OF PFD   PRICE OF COMM     PREMIUM
- ----------------  ------   --------   ------------   --------   -----   ------   ------------   -------------   ----------
<S>               <C>      <C>        <C>            <C>        <C>     <C>      <C>            <C>             <C>
Goodrich Petrol    GDP      $10.00       $7.00        $0.80      11%      NA         $24.00           $2.88           733%
Howell Corp        HWL      $50.00       $34.00       $3.50      10%      NA         $16.50           $6.31           161%
MCN Energy Group   MCN      $50.00       $35.31       $4.00      12%      BBB        $35.38          $17.06           107%
Patina Oil & Gas   POG      $25.00       $21.56       $1.78       9%      NA          $8.61           $5.00            72%
Williams Cos       WMB      $50.00      $123.00       $3.50       3%      BB+        $10.67          $28.75           -63%
Cross Timber Oil   XTO      $25.00       $34.88       $1.56       5%       B         $11.57          $15.06           -23%

- ----------------------------------------------------------------------------------------------------------------------------
Mean                                                              8%                                                  165%
High                                                             12%                                                  733%
Low                                                               3%                                                  -63%
Median                                                            9%                                                   90%
- ----------------------------------------------------------------------------------------------------------------------------
</TABLE>
<PAGE>   42
                                   EXHIBIT 4

          COMPARABLE CONVERTIBLE PREFERRED STOCKS - NON-ENERGY RELATED
<PAGE>   43
          Comparable Convertible Preferred Stocks - Non-Energy Related

<TABLE>
<CAPTION>
                                   Price      9/30/98      Annual             S&P     Conversion      9/30/98     Conversion
        Name            Ticker    at Issue  Price of Pfd  Pfd Div.   Yield   Rating  Price of Pfd  Price of Comm    Premium
- ----------------------- ------    --------  ------------  --------   -----   ------  ------------  -------------  ----------
<S>                     <C>        <C>         <C>         <C>        <C>      <C>      <C>           <C>            <C>
Beazer Homes USA           BZH     $25.00      $28.50      $2.00       7%      B-       $19.05        $20.63          -8%
Cellnet Funding           CNDS     $25.00      $17.25      $1.75      10%      NA       $13.64         $6.00         127%
Echostar Communications   DISH     $50.00      $60.75      $3.38       6%      NR       $24.38        $24.00           2%
Dura Automotive Systems   DRRA     $25.00      $24.00      $1.88       8%      NA       $42.87        $25.88          66%
Environmental Systems      ESC     $25.00      $17.50      $1.75      10%      NR       $28.00        $10.81         159%
First Security            FSCO     $52.50      $30.31      $3.15      10%      NA        $1.28        $16.75         -92%
Global Thermo            GLEAI      $2.16       $3.00      $0.22       7%      NA        $0.54         $0.98         -45%
Hecla Mining Co.            HL     $50.00      $42.00      $3.50       8%      B-       $15.55         $5.06         207%
Metromedia Intl            MMG     $50.00      $22.75      $3.63      16%      NR       $15.00         $3.88         287%
North Coast Energy        NCEB     $10.00       $7.75      $1.00      13%      NR        $1.74         $0.94          85%
Perini Corp                PCR     $25.00      $17.25      $2.13      12%      NR       $37.76         $6.94         444%
PDK Labs Inc              PDKL      $0.00       $4.50      $0.49      11%      NA       $23.33         $3.63         543%
Reckson Associates          RA     $25.00      $21.88      $1.91       9%      NA       $28.51        $23.50          21%
Titan Corp                 TTN      $0.00      $11.94      $1.00       8%      NR       $30.00         $5.25         471%
USA Biomass Corp.         USBC     $10.00       $9.75      $0.90       9%      NR        $5.39         $2.81          92%
US Restaurant Props.       USV     $25.00      $24.94      $1.93       8%      NA       $26.64        $25.44           5%

- ----------------------------------------------------------------------------------------------------------------------------
Mean                                                                  10%                                            148%
High                                                                  16%                                            543%
Low                                                                    6%                                            -92%
Median                                                                 9%                                             88%
- ----------------------------------------------------------------------------------------------------------------------------
</TABLE>


<PAGE>   44
                                                                       EXHIBIT 5


     COMPARABLE COMPANIES - SELECTED DATA FOR FIVE COMPARABLE E&P COMPANIES




<PAGE>   45
                              THE ENEX PARTNERSHIP
                  COMPARABLE PUBLIC COMPANY VALUATION ANALYSIS
           (AMOUNTS IN MILLIONS, EXCEPT PER UNIT AMOUNTS AND RATIOS)




<TABLE>
<CAPTION>
                                           LOW            MEAN           HIGH     FINANCIAL INPUT
                                         RATIO AS       RATIO AS       RATIO AS         FOR                                         
VALUATION RATIOS:                       MULTIPLIER     MULTIPLIER     MULTIPLIER        ENEX         -------------------------------
- -----------------                       ----------     ----------     ----------        ----                     IMPLIED
                                                                                                             ENTERPRISE VALUE       
                                                                                                     -------------------------------
Market Value of Capitalization /                                                                      LOW         MEAN         HIGH
                                                                                                     -------------------------------
<S>                                     <C>            <C>            <C>         <C>                <C>          <C>          <C>  
     Adjusted EBITDX - 6/30/98*             4.1x           6.4x           8.8x         $ 2.6         $10.5        $16.3        $22.5
     Pre Tax SEC PV-10% - 10/1/98            86%           111%           130%         $14.6         $12.5        $16.1        $19.0
     Mcfe                                 $0.60          $0.85          $1.06           13.7         $ 8.3        $11.6        $14.6

Funded Debt                                                                                          $ 0.0        $ 0.0        $ 0.0
</TABLE>

<TABLE>
<CAPTION>
                                                                                                     -------------------------------
                                                                                                                 IMPLIED
                                                                                                              EQUITY VALUE
                                                                                                     -------------------------------
                                                                                                      LOW         MEAN         HIGH
                                                                                                     -------------------------------
<S>                                                                                                  <C>          <C>          <C>  
                                                                                                     $10.5        $16.3        $22.5
                                                                                                     $12.5        $16.1        $19.0
                                                                                                     $ 8.3        $11.6        $14.6
</TABLE>

<TABLE>
<CAPTION>
                                                                                                     -------------------------------
                                                                                                                PER UNIT           
                                                                                                     -------------------------------
                                                                                                      LOW         MEAN         HIGH
                                                                                                     -------------------------------
<S>                                                                                                  <C>         <C>          <C>   
                                                                                                     $ 9.53      $14.78       $20.37
                                                                                                     $11.30      $14.64       $17.23
                                                                                                     $ 7.50      $10.54       $13.22
</TABLE>

               *    Adjusted to exclude non oil and gas sales revenue (i.e.,
                    revenue from gas plant sales, gain from sale of property,
                    other revenues and interest income.)
<PAGE>   46
                                   MIDDLE BAY
                  COMPARABLE PUBLIC COMPANY VALUATION ANALYSIS
            (AMOUNTS IN MILLIONS, EXCEPT PER UNIT AMOUNTS AND RATIOS)


<TABLE>
<CAPTION>
                                           LOW            MEAN           HIGH     FINANCIAL INPUT
                                         RATIO AS       RATIO AS       RATIO AS      FOR MIDDLE                                     
VALUATION RATIOS:                       MULTIPLIER     MULTIPLIER     MULTIPLIER        BAY          -------------------------------
- -----------------                       ----------     ----------     ----------        ---                     IMPLIED
                                                                                                             ENTERPRISE VALUE       
                                                                                                     -------------------------------
Market Value of Capitalization /                                                                      LOW         MEAN         HIGH
                                                                                                     -------------------------------
<S>                                     <C>            <C>            <C>         <C>                <C>          <C>          <C>  
     EBITDX - 6/30/98                       4.1x           6.4x           8.8x         $ 5.4         $22.3        $34.6        $47.7
     Pre Tax SEC PV 10% - 10/1/98            86%           111%           130%         $44.8         $38.3        $49.6        $58.4
     Mcfe                                 $0.60          $0.85          $1.06           75.0         $45.2        $63.4        $79.6
                                                                                     
Funded Debt as of 9/30/98                                                                            $27.5        $27.5        $27.5
</TABLE>

<TABLE>
<CAPTION>
                                                                                                     -------------------------------
                                                                                                                 IMPLIED
                                                                                                              EQUITY VALUE
                                                                                                     -------------------------------
                                                                                                       LOW        MEAN         HIGH
                                                                                                     -------------------------------
<S>                                                                                                  <C>          <C>          <C>  
                                                                                                     ($ 5.2)      $ 7.1        $20.2
                                                                                                      $10.8       $22.1        $30.9
                                                                                                      $17.7       $35.9        $52.1
</TABLE>

<TABLE>
<CAPTION>
                                                                                                     -------------------------------
                                                                                                                PER SHARE           
                                                                                                     -------------------------------
                                                                                                       LOW        MEAN         HIGH
                                                                                                     -------------------------------
<S>                                                                                                  <C>         <C>          <C>   
                                                                                                     ($0.60)     $0.84        $2.37
                                                                                                      $1.27      $2.60        $3.62
                                                                                                      $2.07      $4.21        $6.10
</TABLE>
<PAGE>   47
                    THE ENEX PARTNERSHIP COMPARABLE COMPANIES

                      MARKET, FINANCIAL AND OIL & GAS DATA

               (Amounts in millions, except per share and ratios)

<TABLE>
<CAPTION>
                                            ABRAXAS       COHO        COSTILLA           KEY           WISER
MARKET DATA AS OF 10/2/98                  PETROLEUM     ENERGY        ENERGY         PRODUCTION        OIL       MEDIAN       MEAN
                                           ---------     ------        ------         ----------        ---       ------       ----
<S>                                        <C>          <C>           <C>             <C>            <C>          <C>        <C>   
STOCK SYMBOL                                 AXAS         COHO          COSE              KP            WZR
STOCK PRICE                                 $ 7.00       $ 4.88        $ 7.50          $  6.75        $ 5.06
52 WEEK HIGH                                $19.50       $13.00        $16.38          $ 13.19        $18.75
52 WEEK LOW                                 $ 5.31       $ 4.50        $ 5.88          $  5.88        $ 5.00
% OF 52 WEEK HIGH                             35.9%        37.5%         45.8%            51.2%         27.0%       37.5%      39.5%
MARKET VALUE OF EQUITY (MVE)                $ 43.8       $124.8        $ 73.9          $  77.7        $ 45.3      $ 73.9     $ 73.1
MARKET VALUE OF CAPITAL (MVC)(A)            $321.0       $532.8        $256.5          $ 116.7        $179.7      $256.5     $281.3
COMMON SHARES OUTSTANDING                      6.3         25.6           9.9             11.5           9.0
ANNUAL DIVIDEND                             $ 0.00       $ 0.00        $ 0.00          $  0.00        $ 0.12
DIVIDEND YIELD                                 0.0%         0.0%          0.0%             0.0%          2.4%        0.0%       0.5%
LATEST FISCAL YEAR END (LFY)                 12/97        12/97         12/97            12/97         12/97
                                                                                                     
LATEST 12 MONTHS INCOME STATEMENT:                                                                   
- ----------------------------------                                                                   
TOTAL REVENUE                               $ 68.2       $ 72.9        $ 69.4          $  41.0        $ 70.0      $ 69.4     $ 64.3
  OPERATING EXPENSES                          18.1         23.3          30.1             10.8          27.6
OPERATING CASH FLOW (BEFORE G&A)              50.1         49.6          39.3             30.2          42.4
  GENERAL & ADMINISTRATIVE                     4.8          6.9          10.1              1.8           9.7
OPERATING CASH FLOW (EBITDX)                  45.3         42.8          29.2             28.4          32.7
  DD&A, IMPAIRMENTS & EXPL/DRY HOLE           34.4         98.3          65.5             15.0          41.4
OPERATING INCOME (EBIT)                       10.9        (55.5)        (36.3)            13.4          (8.8)
PRETAX INCOME                                (21.8)       (77.3)        (52.2)            12.5         (13.8)
NET INCOME FROM CONT. OPS                    (16.4)       (60.8)        (52.7)             7.8          (9.1)
NET INCOME                                   (16.4)       (60.8)        (53.0)             7.8          (9.1)
DISCRETIONARY CASH FLOW (DCF)(B)              18.0         37.5          12.6             22.8          32.3
EARNINGS PER SHARE (FROM CONT. OPS.)(C)    ($ 2.92)     ($ 2.37)      ($ 5.14)         $  0.68       ($ 1.02)
DCF PER SHARE (FROM CONT. OPS.)             $ 3.20       $ 1.46        $ 1.22          $  2.00        $ 3.62
AVERAGE SHARES OUTSTANDING (PRIMARY)           5.6         25.7          10.3             11.4           8.9
LATEST 12 MONTHS ENDED (LTM)                  6/98         6/98          6/98             6/98          6/98
                                                                                                      
LATEST BALANCE SHEET:                                                                                 
- ---------------------                                                                                 
CASH & EQUIVALENTS                          $  1.3       $  1.4        $ 17.1          $   4.8        $  0.1
CURRENT ASSETS                                12.2         19.1          29.6             12.5          16.8
NET PROPERTY, PLANT & EQUIPMENT              321.4        484.4         199.5            124.6         227.1
ASSETS                                       343.8        509.8         238.3            138.8         247.8       247.8      295.7
SHORT-TERM DEBT                                0.0          0.0           0.1              0.0           0.0
CURRENT LIABILITIES                           15.9         19.9          25.3             12.9          14.3
LONG-TERM DEBT                               277.2        408.0         182.4             39.0         134.3
TOTAL DEBT                                   277.2        408.0         182.5             39.0         134.3
LIABILITIES                                  329.7        431.6         208.0             70.8         159.0
STOCKHOLDERS' EQUITY                          14.1         78.2          30.2             68.0          88.7
LIABILITIES & STOCKHOLDERS' EQUITY           343.8        509.8         238.3            138.8         247.8
                                                                                                      
WORKING CAPITAL (EXCLUDES S.T.-DEBT)          (3.8)        (0.8)          4.4             (0.5)          2.4
TOTAL CAPITALIZATION                         291.3        486.2         212.8            107.0         223.1       223.1      264.1
ADJUSTED TOTAL CAPITALIZATION (SEC10)        238.6        528.1         210.0             81.6         206.1       210.0      252.9
BOOK VALUE PER COMMON SHARE                 $ 2.26       $ 3.05        $ 3.07          $  5.91        $ 9.91
BALANCE SHEET DATE                            6/98         6/98          6/98             6/98          6/98
</TABLE>
<PAGE>   48
                      MARKET, FINANCIAL AND OIL & GAS DATA

               (Amounts in millions, except per share and ratios)

<TABLE>
<CAPTION>
                                             ABRAXAS         COHO        COSTILLA         KEY          WISER
EPS ESTIMATES:                              PETROLEUM       ENERGY        ENERGY       PRODUCTION       OIL       MEDIAN      MEAN
- --------------                              ---------       ------        ------       ----------       ---       ------      ----
<S>                                         <C>            <C>           <C>           <C>           <C>         <C>        <C>  
EPS FOR FISCAL YEAR END 1998                ($ 3.91)       ($ 0.30)      ($ 2.72)       $ 0.45       ($ 1.95)                     
EPS FOR FISCAL YEAR END 1999                ($ 2.81)        $ 0.46       ($ 1.64)       $ 0.76       ($ 1.42)                     

DCF AND EBITDX ESTIMATES:(D)
- -----------------------------
DCFPS FOR FISCAL YEAR END 1998               $ 2.95         $ 1.04        $ 1.90        $ 2.24        $ 2.27                      
DCFPS FOR FISCAL YEAR END 1999               $ 4.36         $ 2.09        $ 2.77        $ 2.61        $ 2.49                      
EBITDX - 1998                                $48.12         $55.90        $35.10            NA        $34.30                      
EBITDX - 1999                                $61.56         $84.20        $49.40            NA        $39.00                      

VALUATION RATIOS (PRICE TO):
- ----------------------------
EPS FOR LATEST TWELVE MONTHS                     NM             NM            NM           9.9 x          NM        9.9 x      9.9 x
EPS FOR FISCAL YEAR END 1998                     NM             NM            NM          15.0 x          NM       15.0 x     15.0 x
EPS FOR FISCAL YEAR END 1999                     NM           10.6 x          NM           8.9 x          NM        9.7 x      9.7 x
DCFPS FOR LATEST TWELVE MONTHS                  2.2 x          3.3 x         6.1 x         3.4 x         1.4 x      3.3 x      3.3 x
DCFPS FOR FISCAL YEAR END 1998                  2.4 x          4.7 x         3.9 x         3.0 x         2.2 x      3.0 x      3.2 x
DCFPS FOR FISCAL YEAR END 1999                  1.6 x          2.3 x         2.7 x         2.6 x         2.0 x      2.3 x      2.3 x
BOOK VALUE PER COMMON SHARE                     3.1 x          1.6 x         2.4 x         1.1 x         0.5 x      1.6 x      1.8 x
                                             
VALUATION RATIOS (MVC TO):
- --------------------------
PRETAX SEC PV-10% VALUE                         119%           101%          130%          118%           86%       118%       111%
ADJUSTED TOTAL CAPITALIZATION (SEC10)           135%           101%          122%          143%           87%       122%       118%
TOTAL REVENUE                                   4.7 x          7.3 x         3.7 x         2.8 x         2.6 x      3.7 x      4.2 x
EBITDX (BEFORE G&A)                             6.4 x         10.7 x         6.5 x         3.9 x         4.2 x      6.4 x      5.3 x
EBITDX                                          7.1 x           NM           8.8 x         4.1 x         5.5 x      6.3 x      6.4 x
EBITDX - 1998                                   6.7 x          9.5 x         7.3 x          NA           5.2 x      7.0 x      7.2 x
EBITDX - 1999                                   5.2 x          6.3 x         5.2 x          NA           4.6 x      5.2 x      5.3 x
EBIT                                           29.5 x           NM            NM           8.7 x          NM       19.1 x     19.1 x
                                           
VALUATION RATIOS (MVC PER):
- ---------------------------
BARREL OF OIL EQUIVALENT                     $ 5.87         $ 4.45        $ 6.36        $ 6.55        $ 3.61     $ 5.87     $ 5.37
MCF OF GAS EQUIVALENT                        $ 0.98         $ 0.74        $ 1.06            NM        $ 0.60     $ 0.86     $ 0.85

VALUATION RATIOS (MVE TO):
- --------------------------
NET ASSET VALUE                                  NM          119.5%         98.5%        133.5%         53.1%     109.0%     101.2%
NET INCOME FROM CONT. OPS TO COMMON              NM             NM            NM          10.0 x          NM       10.0 x     10.0 x
DISCRETIONARY CASH FLOW TO COMMON               2.4 x          3.3 x         5.9 x         3.4 x         1.4 x      3.3 x      3.3 x

PROFITABILITY MARGINS:
- ----------------------
EBITDX (BEFORE G&A)                            73.4%          68.1%         56.7%         73.7%         60.5%      68.1%      66.5%
EBITDX                                         66.4%          58.7%         42.1%         69.2%         46.6%      58.7%      56.6%
EBIT                                           15.9%            NM            NM          32.6%           NM       24.3%      24.3%
NET INCOME FROM CONT. OPS                        NM             NM            NM          18.9%           NM       18.9%      18.9%
DISCRETIONARY CASH FLOW                        26.4%          51.4%         18.1%         55.6%         46.2%      46.2%      39.5%

LEVERAGE RATIOS (DEBT TO):
- --------------------------
STOCKHOLDERS' EQUITY                         1961.9%         521.8%        604.1%         57.4%        151.4%     521.8%     659.3%
TOTAL CAPITALIZATION                           95.2%          83.9%         85.8%         36.5%         60.2%      83.9%      72.3%
MARKET VALUE OF EQUITY                        632.3%         326.9%        247.0%         50.2%        296.4%     296.4%     310.6%
MARKET VALUE OF CAPITAL                        86.3%          76.6%         71.2%         33.4%         74.8%      74.8%      68.5%
</TABLE>
<PAGE>   49
                      MARKET, FINANCIAL AND OIL & GAS DATA

               (Amounts in millions, except per share and ratios)

<TABLE>
<CAPTION>
                                            ABRAXAS           COHO        COSTILLA        KEY            WISER
NET ASSET VALUE CALCULATION:               PETROLEUM         ENERGY        ENERGY      PRODUCTION         OIL       MEDIAN     MEAN
- ----------------------------               ---------         ------        ------      ----------         ---       ------     ----
<S>                                        <C>             <C>            <C>          <C>             <C>          <C>       <C>   
WORKING CAPITAL (EXCL. S-T DEBT)           ($    3.8)      ($   0.8)      $    4.4     ($    0.5)      $    2.4
PRETAX SEC PV-10% VALUE                        268.7          526.3          196.7          99.3          210.1     $210.1    $260.2
NET PP&E ADDED SINCE FYE                        10.9          (17.2)          22.6           5.9            5.7
                                                                                                     
UNDEVELOPED ACREAGE                                                                                  
  DOMESTIC ONSHORE ($50/ACRE)                305,108         23,319        607,703       197,000        143,219
  DOMESTIC OFFSHORE ($100/ACRE)                    0              0                                  
  INTERNATIONAL ($25/ACRE)                         0                                                 
                                            --------        -------       --------      --------       --------
TOTAL UNDEVELOPED ACREAGE                    305,108         23,319        607,703       197,000        143,219
                                                                                                     
TOTAL VALUE OF UNDEVELOPED ACREAGE          $   15.3        $   1.2       $   30.4      $    9.9       $    7.2
NET NON-OIL & GAS NONCURRENT ASSETS (FYE)          0            6.6            3.8           1.5            4.7
                                            --------        -------       --------      --------       --------
  GROSS ASSET VALUE                         $  291.1        $ 516.2       $  257.9      $  116.0       $  230.1
LESS: TOTAL DEBT AND PREFERRED                 277.2          408.0          182.5          39.0          134.3
LESS: OTHER LONG-TERM LIABILITIES               36.6            3.7            0.3          18.9           10.4
                                            --------        -------       --------      --------       --------
  NET ASSET VALUE                          ($   22.7)       $ 104.5       $   75.0      $   58.1       $   85.4     $ 75.0    $ 60.1
                                            ========        =======       ========      ========       ========
                                                                                                     
  NET ASSET VALUE PER SHARE                ($   3.62)       $  4.08       $   7.61      $   5.05       $   9.54
</TABLE>
<PAGE>   50
                      MARKET, FINANCIAL AND OIL & GAS DATA

               (Amounts in millions, except per share and ratios)

<TABLE>
<CAPTION>
                                          ABRAXAS            COHO           COSTILLA               KEY               WISER       
RESERVE DATA (FYE) (GAS/OIL = 6:1)      PETROLEUM          ENERGY           ENERGY            PRODUCTION             OIL         
- ----------------------------------      ---------          ------           ------            ----------             ---         
<S>                                   <C>               <C>             <C>                <C>                  <C>              
TOTAL PROVED OIL (MMBbls)                      17.8            95.1               15.0                  6.2              29.7    
TOTAL PROVED GAS (Bcf)                        221.3           147.5              152.0                 69.5             120.1    
                                            -------         -------            -------              -------           -------    
  TOTAL PROVED RESERVES (MMBoe)                54.7           119.7               40.3                 17.8              49.7    
  TOTAL PROVED RESERVES (Bcfe)                328.0           718.0              241.8                106.8             298.4    
  PERCENT OIL                                  32.5%           79.5%              37.1%                34.9%             59.8%   
                                                                                                                                 
PROVED DEVELOPED OIL (MMBbls)                  14.3                               10.6                  6.2              28.2    
PROVED DEVELOPED GAS (Bcf)                    186.5                               86.2                 67.8             109.5    
                                            -------         -------            -------              -------           -------    
  TOTAL PROVED DEVELOPED (MMBoe)               45.3            84.2               25.0                 17.5              46.4    
  PERCENT OIL                                  31.4%            0.0%              42.5%                35.4%             60.7%   
  % PERCENT DEVELOPED                          82.9%           70.4%              62.0%                98.3%             93.4%   
                                                                                                                                 
PRODUCTION DATA (GAS/OIL = 6:1):                                                                                                 
LFY OIL PRODUCTION (MMBbls)                     1.9             2.8                2.2                  0.8               2.8    
LFY GAS PRODUCTION (Bcf)                       21.1             7.7               14.7                 11.0              12.8    
                                            -------         -------            -------              -------           -------    
  TOTAL PRODUCTION (MMBoe)                      5.4             4.1                4.6                  2.7               4.9    
  PERCENT OIL                                  35.5%           68.8%              47.0%                31.5%             56.3%   
                                                                                                                                 
OTHER OIL & GAS DATA:                                                                                                            
AVG OIL PRICE (PER Bbl)                     $ 18.63         $ 16.31            $ 17.77              $ 18.04           $ 15.92    
AVG GAS PRICE (PER Mcf)                     $  1.79         $  2.23            $  2.29              $  2.38           $  2.35    
                                                                                                                                 
ACCOUNTING METHOD                                FC              FC                 SE                   FC                SE    
                                                                                                                                 
MAJOR PRODUCING AREAS                      S. Texas     Mississippi         Gulf Coast       Anadarko Basin     Permian Basin    
                                      Permian Basin       Louisiana     Rocky Mountain       Rocky Mountain        New Mexico    
                                             Canada                      Mid-Continent           Gulf Coast            Canada    
                                                                         Permian Basin     North Central TX                      
</TABLE>

<TABLE>
<CAPTION>
                                                     
RESERVE DATA (FYE) (GAS/OIL = 6:1)        MEDIAN       MEAN
- ----------------------------------        ------       ----
<S>                                       <C>        <C>    
TOTAL PROVED OIL (MMBbls)                                   
TOTAL PROVED GAS (Bcf)                                      
                                                     
  TOTAL PROVED RESERVES (MMBoe)             49.7       56.4
  TOTAL PROVED RESERVES (BCfe)             298.4      338.6
  PERCENT OIL                               37.1%      48.8%
                                                     
PROVED DEVELOPED OIL (MMBbls)                              
PROVED DEVELOPED GAS (Bcf)                                 
                                                     
  TOTAL PROVED DEVELOPED (MMBoe)            45.3       43.7
  PERCENT OIL                               35.4%      34.0%
  % PERCENT DEVELOPED                       82.9%      81.4%
                                                     
PRODUCTION DATA (GAS/OIL = 6:1):                     
LFY OIL PRODUCTION (MMBbls)                                
LFY GAS PRODUCTION (Bcf)                                   
                                                     
  TOTAL PRODUCTION (MMBoe)                   4.6        4.3
  PERCENT OIL                               47.0%      47.8%
                                                     
OTHER OIL & GAS DATA:                                
AVG OIL PRICE (PER Bbl)                   $17.77     $17.33
AVG GAS PRICE (PER Mcf)                   $ 2.29     $ 2.21
                                                     
ACCOUNTING METHOD                                                
                                                     
MAJOR PRODUCING AREAS                                      
                                                              
                                                                 
                                                     
</TABLE>


FOOTNOTES

- ----------

(A) Market value of capitalization (MVC) is defined as market value of equity,
plus liquidation/market/book value of preferred stock, plus market/book value of
total debt, less excess cash and equivalents. 

(B) Discretionary cash flow is defined as net income from continuing operations
plus DD&A, impairments, exploration/dry hole costs and other non-cash items.

(C) Earnings per share (EPS) is defined as net income from continuing operations
less preferred dividends divided by the weighted average shares outstanding.

(D) Obtained 1998 and 1999 EBITDX from company research reports as follows:
Abraxas (Oppenheimer), Coho (Jefferies), Costilla (Oppenheimer), Wiser
(Jefferies)
<PAGE>   51
THE ENEX PARTNERSHIP

<TABLE>
<CAPTION>
                                                   12 mths         6 mths         6 mths          TTM
                                                  12/31/97        6/30/98        6/30/97        6/30/98
                                                 -----------    -----------    -----------    -----------
<S>                                              <C>            <C>            <C>            <C>        
Revenues                                         $11,997,301    $ 3,768,515    $ 5,848,030    $ 9,917,786
General & Administrative                           1,611,221        606,900        816,647      1,401,474
Operating Costs                                    4,967,493      1,588,244      2,471,792      4,083,945
                                                 -----------    -----------    -----------    -----------
EBITDX                                           $ 5,418,587    $ 1,573,371    $ 2,559,591    $ 4,432,367
Adjusted EBITDX *                                $ 3,425,054    $ 1,045,953    $ 1,911,831    $ 2,559,176

DD&A                                               1,839,877        932,013      1,048,413      1,723,477
Impairments (write-offs)                                  --             --             --             --
                                                 -----------    -----------    -----------    -----------
EBIT                                             $ 3,578,710    $   641,358    $ 1,511,178    $ 2,708,890

Interest                                                  --             --             --             --
                                                 -----------    -----------    -----------    -----------
Net Income                                       $ 3,578,710    $   641,358    $ 1,511,178    $ 2,708,890
                                                 ===========    ===========    ===========    ===========


Gas Plant Sales                                  $ 1,157,068    $    17,733    $   619,555    $   555,246
Gain From Sale of Property                           741,617        504,621          5,940      1,240,298
Other Revenue                                         21,000          1,432         21,000          1,432
Interest Income                                       73,848          3,632          1,265         76,215
                                                 -----------    -----------    -----------    -----------
Non Operating Revenues                           $ 1,993,533    $   527,418    $   647,760    $ 1,873,191
                                                 ===========    ===========    ===========    ===========
</TABLE>

<TABLE>
<S>                                              <C>       
- -----------------------------------------------------------
Cash and Cash Equivalents                        $1,473,450

Current Assets                                    2,606,951
Current Liabilities                                 602,512
- -----------------------------------------------------------
</TABLE>

*   Adjusted to exclude non oil and gas sales revenue (i.e., revenue from gas
    plant sales, gain from sale of property, other revenues and interest
    income.)
<PAGE>   52
MIDDLE BAY

<TABLE>
<CAPTION>
                                               12 mths           6 mths           6 mths            TTM
                                              12/31/97          6/30/98          6/30/97          6/30/98
                                            ------------     ------------     ------------     ------------
<S>                                         <C>              <C>              <C>              <C>         
Revenues                                    $ 11,432,995     $  7,564,994     $  3,752,786     $ 15,245,203
General & Administrative                       2,361,124        2,260,553          953,700        3,667,977
Operating Costs                                3,848,627        3,605,015        1,316,681        6,136,961
                                            ------------     ------------     ------------     ------------
EBITDX                                      $  5,223,244     $  1,699,426     $  1,482,405     $  5,440,265

DD&A                                           4,567,063        3,024,942        1,054,817        6,537,188
Exploration (Geological and Geophysical)         222,608          788,115          115,191          895,532
Abandonment Costs                              1,118,838          307,264          235,719        1,190,383
Impairments (Write-offs)                      21,147,823               --               --       21,147,823
Other (Including Stock Compensation)             519,969           67,500               --          587,469
                                            ------------     ------------     ------------     ------------
EBIT                                        $(22,353,057)    $ (2,488,395)    $     76,678     $(24,918,130)
Interest                                         671,081          812,841          259,743        1,224,179
                                            ------------     ------------     ------------     ------------
Pretax Income                               $(23,024,138)    $ (3,301,236)    $   (183,065)    $(26,142,309)
Minority Interest                                     --         (148,686)              --         (148,686)
Income Tax (Benefit) Expense                  (7,444,798)      (1,071,867)              --       (8,516,665)
                                            ------------     ------------     ------------     ------------
Net Income (Loss)                           $(15,579,340)    $ (2,080,683)    $   (183,065)    $(17,476,958)
                                            ============     ============     ============     ============
</TABLE>


<TABLE>
<S>                                                                <C>        
- -------------------------------------------------------------------------------
Cash and Cash Equivalents                                          $ 2,061,612
Current Assets                                                       7,641,959
Current Liabilities                                                  7,240,951
Current Maturities of LTD                                            4,091,535
Long Term Debt                                                      26,628,604
- -------------------------------------------------------------------------------
</TABLE>


<PAGE>   1
                                                                    
                                                                  EXHIBIT(b)(2)


H.J. GRUY AND ASSOCIATES, INC. 
- -------------------------------------------------------------------------------
1200 Smith Street, Suite 3040, Houston, Texas 77002 - FAX (713)739-6112 - 
(713)739-1000

                                                      November 23, 1998

Middle Bay Oil Company, Inc.
1221 Lamar, Suite 1020
Houston, Texas 77010

                                            RE: ENEX CONSOLIDATED PARTNERS, L.P.
                                                PROVED RESERVES
                                                98-292-104

Gentlemen:

As your request, we estimated the proved reserves and future net cash flows as 
of January 1, 1998, attributable to interest owned by Enex Consolidated 
Partners, L.P.(Enex). The estimated net reserves, future net cash flow, and 
discounted future net cash flow are summarized by reserve category as follows:

<TABLE>
<CAPTION>

                              Estimated                   Estimated
                            Net Reserves            Future Net Cash Flow
                      ------------------------    ---------------------------


                                                                 Discounted
                          Oil           Gas                         at 10%
                      (Barrels)        (Mcf)      Nondiscounted    Per Year
                      ---------     ----------    -------------  ------------
<S>                   <C>           <C>           <C>            <C>
Proved Developed 
Producing             1,131,460      8,390,451     $23,266,539    $14,937,145

Proved Developed 
Nonproducing             18,831      2,691,360       5,318,858    $ 1,783,404
                      ---------     ----------     -----------    -----------

TOTAL PROVED          1,150,291     11,081,811     $28,585,397    $16,720,549
</TABLE>


The discounted future net cash flows summarized in the above table are computed 
using a discount rate of 10 percent per annum. Proved reserves are estimated in 
accordance with the definitions contained in Securities and Exchange Commission 
Regulation S-X, Rule 4-10 (a). The definitions are included in part as 
Attachment I.

Future net cash flow as presented herein is defined as the future cash inflow 
attributable to the evaluated interest less, if applicable, future direct 
operating costs, ad valorem taxes, and future

<PAGE>   2
   
Middle Bay Oil Company, Inc.             -2-                  November 23, 1998


capital expenditures. Future cash inflow is defined as gross cash inflow less, 
if applicable, royalties and severence taxes. Future cash inflow and future net 
cash flow as stated in this report exclude consideration of state or federal 
income tax. Future costs of abandoning the facilities and wells, and the 
possible restoration of producing properties to satisfy environmental 
standards are not deducted from cash flow. 

Estimates of future net cash flow and discounted future net cash flow are not 
to be interpreted to represent the fair market value for the estimated 
reserves. The estimated reserves included in this report have not been adjusted 
for uncertainty.

For the economic forecasts presented in this report, the oil, condensate, 
natural gas liquids, and natural gas sales prices are held constant at the 
initial value. Direct operating costs and future capital expenditures are not 
escalated and therefore remain constant for the projected life of each property.

In conducting this evaluation, we relied on data supplied by Enex Resources 
Corporation. The extent and character of ownership, oil and natural gas sales 
prices, direct operating costs, future capital expenditures, historical 
production, accounting, geological, and engineering data were accepted as 
represented. Historical production data were available at least through the 
month of June 1997. Interim production to January 1, 1998, is estimated. No 
independent well tests, property inspections, or audits of operating expenses 
were conducted by our staff in conjunction with this evaluation. We did not 
verify or determine the extent, character, status, or liability, if any, of gas 
imbalances or any current or possible future detrimental environmental 
conditions.

For wells with sufficient production history, reserve estimates and production
rate forecasts are based on the extrapolation of established performance
trends. Reserve estimates for nonproducing, and some producing properties are
based on volumetric calculations and analogy with the performance of comparable
wells. Reserve estimates from volumetric methods and from analogy comparisons
are often less certain than reserve estimates based on well performance obtained
over a period during which a substantial portion of the ultimate recovery was
produced. The reserves reported herein are estimates only and should not be
construed as exact quantities. Future conditions may affect recovery of
estimated reserves and cash flows, and reserves of all categories may be subject
to revision as more performance data become available. 

In order to estimate the reserves, costs, and future cash flows shown in this
report, we have relied in part on geological, engineering, and economic data
furnished by our client. Although we have made a best efforts attempt to acquire
all pertinent data and to analyze it carefully with methods accepted by the
petroleum industry, there is no guarantee that the volumes of oil or gas or the
cash flows projected will be realized. The reserve and cash flow projections
presented in this report may required revision as additional data become
available.

If investments or business decisions are to be made in reliance on these
estimates by anyone other than our client, such person, with the approval of our
client, is invited to visit our offices at his expense so that he can evaluate
the assumptions made and the completeness and extent of the data available on
which our estimates are based.



H.J. GRUY AND ASSOCIATES, INC.   1200 Smith Street, Suite 3040 Houston, Texas 
                                                          77002 - (713) 739-1000
    
<PAGE>   3

   
Middle Bay Oil Company, Inc.                -3-                November 23, 1998


Any distribution or publication of this report or any part thereof must include
this letter in its entirety.


                                       Yours very truly,
                                       
                                       
                                       H.J. GRUY AND ASSOCIATES, INC.
                                       
                                       
                                       by: /s/ James H. Hartsock          [SEAL]
                                           ------------------------------
                                           James H. Hartsock, PhD, PE
                                           Executive Vice President
                                       
                                       
                                       
                                       by: /s/ Sylvia Castilleja
                                           ------------------------------
                                           Sylvia Castilleja
                                           Senior Reservoir Consultant

JHH/SC:akr
Attachment

H.J. GRUY AND ASSOCIATES, INC. 1200 Smith Street, Suite 3040, Houston, Texas
77002 * (713)739-1000

    


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