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                            [MISSION RESOURCES LOGO]

                               ANALYST CONFERENCE
                                 MARCH 30, 2001


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SAFE HARBOR DISCLOSURE
================================================================================

This presentation includes "forward-looking statements" as defined by the
Securities and Exchange Commission. Such statements are those concerning the
companies' merger and strategic plans, expectations and objectives for future
operations. All statements included in this presentation that address
activities, events or developments that the companies expect, believe or
anticipate will or may occur in the future are forward-looking statements. This
includes completion of the proposed merger, completion of reserve estimates,
production, cash flow and EBITDA estimates, future financial performance, future
equity issuance and other matters. These statements are based on certain
assumptions made by the companies based on their experience and perception of
historical trends, current conditions, expected future developments and other
factors they believe are appropriate in the circumstances. Such statements are
subject to a number of assumptions, risks and uncertainties, many of which are
beyond the control of the companies. Statements regarding future production are
subject to all of the risks and uncertainties normally incident to the
exploration for and development and production of oil and gas. These risks
include, but are not limited to, inflation or lack of availability of goods and
services, environmental risks, drilling risks and regulatory changes. Investors
are cautioned that any such statements are not guarantees of future performance
and that actual results or developments may differ materially from those
projected in the forward-looking statements.

Investors and security holders are urged to read the proxy statement/prospectus
that will be included in the Registration Statement on Form S-4 filed with the
SEC in connection with the proposed merger. Bellwether Exploration Company
("Bellwether") and Bargo Energy Company ("Bargo") have filed the proxy
statement/prospectus with the SEC. Investors and security holders may obtain a
free copy of the proxy statement/prospectus (when available) and other documents
filed by Bellwether and Bargo with the SEC at the SEC's web site at www.sec.gov.
The proxy statement/prospectus and such other documents (relating to Bellwether)
may also be obtained for free from Bellwether by directing such request to:
Bellwether Exploration Company, 1331 Lamar, Suite 1455, Houston, Texas 77010,
Attention: Lance Weaver; telephone: (713) 495-3061; e-mail:
weaverl@bellwetherexp.com. The proxy statement/prospectus and such other
documents (relating to Bargo) may also be obtained for free from Bargo by
directing such request to: Bargo Energy Company, 700 Louisiana, Suite 3700,
Houston, Texas 77002, Attention: Jerry Sears; telephone: (713) 236-9792; e-mail:
jsears@bargo.com.

Bellwether, its directors, executive officers and certain members of management
and employees may be considered "participants in the solicitation" of proxies
from Bellwether's shareholders in connection with the merger. Information
regarding such persons and a description of their interests in the merger is
contained in the Registration Statement on Form S-4.

Bargo, its directors, executive officers and certain members of management and
employees may be considered "participants in the solicitation" in connection
with the merger. Information regarding such persons and a description of their
interests in the merger is contained in the Registration Statement on Form S-4.


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AGENDA
================================================================================

Introduction to Mission Resources           Doug Manner

Property overview & operating objectives    Joe Nicknish

2001 capital expenditure budget
      &  strategic initiatives              Kent Williamson

Financial strategy                          Jon Clarkson

Actual 2000, pro forma 2001
      & 2002 financials                     Ann Kaesermann

Corporate M&A strategy &
      administrative overview               Dan Foley



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================================================================================







[PHOTO]                            Doug Manner

                                 Chairman & CEO





[Page 4 depicts picture of Doug Manner]

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SITUATION - BELLWETHER & BARGO
================================================================================

Bellwether (2000)

o        Issues

         -        Scattered assets, low reserve life index, 30% operated, 85%
                  hedged, debt to book capital of 70%, inexperienced management,
                  too small

o        Actions

         -        Sold $49 MM of properties

         -        Paid down debt

         -        Bought back 15,000 MMBTU/Day of hedges

         -        Acquired new management expertise - engineering, budget
                  control, finance

         -        Commenced acquisition/merger discussions




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SITUATION - BELLWETHER & BARGO
================================================================================

Bellwether (2000)

o        Desired position was:

         -        Focused assets

         -        8 year reserve life index

         -        70% operated

         -        Less than 50% hedged

         -        Debt to book capitalization less than 50%

         -        Strong management

         -        Billion dollar market capitalization with extensive market
                  coverage

o        Strategy

         -        Base - Exploitation and low risk exploration, farm-out high
                  risk exploration

         -        Growth - Corporate consolidation and acquisition

         -        Looking for strategic corporate acquisition



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SITUATION - BELLWETHER & BARGO
================================================================================

Bargo (2000)

o        Strong results in executing acquisition strategy, and subsequent
         optimization of operations

         -        Texaco acquisition quadrupled reserves

o        Focus on maximization of return on investments in long-life oil
         properties

         -        Sold >$100 MM of assets for well above acquisition cost

o        Minimal access to capital markets for further growth

o        Shareholders desiring tax efficient liquidity

         -        Decided against IPO or addition of private equity






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MISSION RESOURCES - THE COMBINATION
================================================================================

o        Bellwether plus Bargo

         -        Asset overlap, increased reserve life index, increased
                  operated production, hedge dilution, improved debt to book
                  capital, completed management team, increased market
                  capitalization

         -        High grading opportunities and operations

         -        Continuing both companies' strategy of growth by acquisition

         -        Management team with technical and financial expertise to
                  accomplish significant strategic growth as well as base asset
                  growth

o        Pro forma asset statistics

         -        78.5 MMBOE, net of January property sale

         -        R/P 9 years, 80% developed, 68% oil, 46% operated

         -        23 MBOE/day production

         -        Three focus areas:

                  o        Permian - 39% of reserves, long life oil

                  o        Onshore Gulf Coast - 20% of reserves, exploitation
                           opportunities

                  o        Gulf of Mexico - 8% of reserves, exploitation and
                           exploration opportunities


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MERGER DETAILS
================================================================================

o        Bellwether acquiring Bargo, deal announced Jan 25th

o        New Name: Mission Resources Corporation

o        $1.26 per share for Bargo common ($140 MM, approximately 40% in cash,
         60% in Bellwether stock)

o        Bargo preferred stockholders receive cash ($61 MM)

o        Amendment No. 1 to S-4 filed with the SEC Mar 19th

o        Anticipate Bellwether Shareholder meeting in early May

o        Total deal (Pro Forma at December 31, 2000)

         -        $200 MM for common and preferred stock ($120MM Cash, $80MM
                  stock)

         -        $29 MM assumed debt

         -        46.9 MMBOE proved reserves

         -        Less than $5.00/BOE direct acquisition cost



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STRATEGIC DIRECTION
================================================================================

o        Fully exploit existing asset base

         -        Focus on costs, full cycle economics

o        Divest non-core, non-strategic properties

         -        Reduce Company's operating cost/BOE

o        Growth through acquisition

         -        Corporate transactions via "unadvertised" opportunities,
                  public and private companies

         -        Property transactions in focus areas, potential addition of
                  new core area








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EXECUTIVE MANAGEMENT
================================================================================


[PHOTO]

                            Doug Manner
                          Chairman & CEO

                                              Jon Clarkson
                                             President & CFO


   Kent Williamson             Joe Nicknish                 Dan Foley
 Sr. VP - Planning          Sr. VP - Operations         Sr. VP - Corporate
  & Exploration               & Exploitation                 Finance

Portfolio Management         Field Operations              Corporate M&A
  Budget Control                 Drilling                Accounting & Tax
  Exploration                      Land                       Finance
                                                             Marketing
                                                           Administration

[Page 11 depicts pictures of the management & organizational chart w/Doug
Manner as Chairman & CEO, Jon Clarkson as President & CFO, Kent Williamson Sr.
VP - Planning & Exploration, Joe Nicknish Sr. VP - Operations & Explorations &
Dan Foley Sr. VP - Corporate Finance]

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BOARD OF DIRECTORS (nominated)
================================================================================

Doug Manner          Chairman and CEO, Mission Resources

Jon Clarkson         President and CFO, Mission Resources

Judy Ley Allen       Board Member of Federal Reserve Bank - Dallas

J.P. Bryan           Senior Managing Director,
                      Torch Energy Advisors, Inc.

Tim J. Goff          Ranching (former Chairman and CEO, Bargo)

Habib Kairouz        Managing Director, Rho Management Co., Inc.

D. Martin Phillips   Managing Director, Encap Investments L.L.C.




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MISSION RESOURCES - STATUS & GOALS
================================================================================

o        Integration of Bellwether and Bargo is well underway

o        Major goals for 2001

         -        Maintain production levels with targeted capex - predominantly
                  exploitation, nominal exploration

         -        Reduce costs by managing the portfolio and improving operation
                  efficiencies

         -        Increase balance sheet liquidity

         -        Pursue corporate consolidation opportunities, close one or
                  more

         -        Improve visibility and perception in capital markets

o        Mission Resources is a unique mid-cap E&P investment opportunity

         -        New, enthusiastic management team with expertise in
                  exploitation, M&A, and capital markets

         -        Growth philosophy coupled with extensive industry contacts


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================================================================================


[PHOTO]                         Joe Nicknish

                      Sr. Vice President of Operations
                               and Exploitation















[Page 14 depicts picture of Joe Nicknish]

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PROPERTY OVERVIEW
================================================================================

[MAP]

                                TOP TWENTY FIELDS



                                            
         1        East Texas                  TX      Oil
         2        Leroy North                 LA      Gas
         3        Waddell                     TX      Oil
         4        Levelland/Slaughter         TX      Oil
         5        Cross Creek                 TX      Gas
         6        Bright Falcon               TX      Gas
         7        Tiguino                     EC      OIl
         8        Eugene Island Block 292     FO      Gas
         9        Wasson                      TX      Oil
         10       Raccoon Bend                TX      Oil
         11       Second Bayou                LA      Gas
         12       Goldsmith OBO               TX      Oil
         13       Ship Shoal Block 246        FO      Gas
         14       Charapa                     EC      Oil
         15       Giddings                    TX      Mix
         16       TXL                         TX      Oil
         17       High Island Block 552       FO      Gas
         18       Porter's Creek              TX      Gas
         19       Bedford                     TX      Oil
         20       Reddell                     LA      Gas






[Page 15 depicts a map of New Mexico, Texas, Louisiana, & the Gulf of Mexico w/
a map of Ecuador inserted in the lower left corner. The map contains pictures
from 1-20 indicating the top 20 fields.

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RESERVES BY REGION
================================================================================

o        Pro Forma reserves at December 31, 2000 of 78.5 MMBOE


                                  [PIE CHART]


{Page 16 depicts a pie chart. The text of the chart is as follows:



                       
EAST TEXAS                14%

GULF COAST ONSHORE        20%

GULF COAST OFFSHORE        8%

GULF COAST COMBINED       28%)

ECUADOR                   10%

PERMIAN                   39%

OTHER                      9%]




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RESERVE PROFILE
================================================================================

o        Production approximately 23,000 BOE per day, reserve life index 9 years


  [PIE CHART]                 [PIE CHART]              [PIE CHART]
RESERVE CATEGORIES            OIL vs. GAS              OPERATED vs.
                                                       NON-OPERATED




[Page 17 depicts 3 pie charts. The pie chart titled Reserve Categories contains
the following text:

PUD 20%
PDP 70%
PDN 10%

The pie chart titled Oil vs. Gas contains the following text:

Gas 32%
Oil 68%

The pie chart titled Operated vs. Non-operated contains the following text:

Non-Op   54%
Operated 46%]

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CHARACTERIZATION OF MISSION PROPERTIES
================================================================================

o        Permian (39% of Reserves)

         -        Long-life production, primarily oil

         -        Mostly operated by majors or large independents

         -        Waterfloods with long-term CO2 potential for increased oil
                  recovery

         -        New Mexico gas production with exploration upside

o        Gulf Coast (20% of Reserves)

         -        Upside potential in structural and stratigraphic gas plays

         -        Upside oil potential in large field previously operated by a
                  major

         -        Inventory of exploration and exploitation prospects

o        Gulf of Mexico (8% of Reserves)

         -        High rate gas production

         -        Focus of exploration program

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CHARACTERIZATION OF MISSION PROPERTIES
================================================================================

o        East Texas (14% of Reserves)

         -        Operated oil production primarily from East Texas oil field

         -        Properties purchased from Arco and Texaco

         -        Optimization potential on previous Texaco properties

o        Ecuador (10% of Reserves)

         -        Oil production with significant exploitation upside

         -        Exploration upside

o        Mid-Continent (4% of Reserves)

         -        Panhandle gas production with exploitation potential

o        West Coast (5% of Reserves)

         -        Significant oil production and potential offshore California


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OPERATING OBJECTIVES
================================================================================

o        Focus on production engineering to capture low risk opportunities

o        Reduce operating costs by reorganizing staff and optimizing key
         operating drivers

o        Utilize current technology to maximize returns - fracs, 3-D, etc.

o        Perform detailed field studies to identify additional reserves

o        Focus energies on core assets to optimize field operations - decrease
         lifting costs and increase production rates






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OUTSOURCING STRATEGY - OPERATIONS
================================================================================

o        Both companies currently outsource operations

         -        Bellwether uses Torch Energy Advisers and Tecnie

         -        Bargo uses Cameron Engineering and Gas Solutions

o        Mission will outsource field operations

         -        Choice of contractor will be a function of service quality and
                  cost

         -        Contract Operator will function as essential member of Asset
                  Teams

o        Mission Asset Management Teams will retain ultimate decision authority
         on:

         -        Project identification

         -        scheduling

         -        funding

         -        third party vendor approvals




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OPERATIONS / TECHNICAL
================================================================================

      FUNCTIONS:
     Budget Control
      Operations
        Land
Drilling - Exploration
Drilling - Exploitation
   Portfolio Management


                             [ORGANIZATIONAL CHART]




[Page 22 depicts an organizational chart w/ Doug Manner as Chairman & CEO, Kent
Williamson as Sr. VP - Planning & Exploration, Joe Nicknish as Sr. VP -
Operations & Exploration, Matt Gallagher as Exploration Manager, Rudy
Wildenstein as Engineering Manager, Jim Enlow as Land Manager, Steve Turk as
Operations Manager & Byron Yeatman as V.P. Exploration]



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================================================================================



[PHOTO]                         Kent Williamson

                        Sr. Vice President of Planning
                                and Exploration





[Page 23 depicts a picture of Kent Williamson]


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CAPITAL EXPENDITURE STRATEGY
================================================================================

o  Group projects according to degree of discretion allowed and urgency:

     -  Safety, health, environment, regulatory Least Discretionary

     -  Protection of land position / work commitment

     -  Prevention of production disruptions                Least Discretionary
                                                                     |
     -  Competitive production situations                    More discretionary

     -  OBO Exploitation and exploration opportunities

     -  Operated exploitation and exploration opportunities

     -  LOE reduction More discretionary

o  Prioritize projects based on analysis that considers:

     -  Rate of return

     -  return on investment

     -  production and reserves added

     -  Probability of success

o  Strike balance between projects that provide immediate cash flow
   enhancement versus projects that increase reserves or set up future
   reserve growth

o  Control spending throughout the year, and adjust priorities to adapt to
   changing circumstances and new opportunities

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PROJECTED CAPITAL EXPENDITURES
================================================================================

                              2001 ESTIMATED CAPEX
                                    $110 MM
                                   ---------


[PIE CHART]              EXPLORATION PROJECTS:

                         Madisonville
                         Raccoon Bend
                         Morrow / Atoka plays
                         Ship Shoal Blk 225


                         DEVELOPMENT PROJECTS:

                         Oak Hill
                         Cross Creek
                         Candy
                         Tiquino



[Page 25 depicts a pie chart of 2001 Estimated CAPEX $110MM. The text of the
chart is as follows:

*Exploratory    $11MM
Land/Seis./Oth  $ 8MM
Development     $41MM
Acquisition     $50MM

* includes all non-proved drilling]


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PROJECTED CAPITAL EXPENDITURES
================================================================================

                              2002 ESTIMATED CAPEX
                                    $160 MM
                                   ---------

                                   EXPLORATION PROJECTS:

[PIE CHART]                        North Leroy
                                   S. Bayou Boeuf
                                   High Island Blk 552
                                   Tranquillon Ridge


                                   DEVELOPMENT PROJECTS:

                                   S. Kilgore unit
                                   Various permian fields
                                   Ship Shoal Blk 214
                                   Tiguino
                                   Charapa

[Page 26 depicts a pie chart of 2002 Estimated CAPEX $160MM. The text of the
chart is as follows:

Acquisition    $100MM
Land/Seis./Oth $ 10MM
*Exploratory   $ 20MM
Development    $ 30MM

* includes all non-proved drilling]

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CAPITAL PROJECT INVENTORY
================================================================================



                                 Number       Net        Net
                                   Of       Capital    Unrisked
Project Type                    Projects     Cost      Potential
- ------------                    --------     ----      ---------
                                               
Proved
(Low risk exploitation)            472     $  80 MM    26 MMBOE

Other Potential
(Exploitation & exploratory)       209      $142 MM    Not disclosed







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SOUTH TIMBALIER BLOCK 199
================================================================================

                                   [DIAGRAM]

o SEISMIC USED FOR RISK REDUCTION...Lentic Channel Sand objectives defined by
mapping with 3-D seismic. AVO processing of 2-D seismic data shows presence of
hydrocarbon indicator.

o ANALOGOUS TO NEARBY PRODUCTION...South Timbalier Block 212 and 213 Fields
produce from similar Lentic Channel sand reservoirs..

o SIGNIFICANT INTEREST...Mission owns 25% working interest in the prospect.

o NEAR-TERM SPUD DATE... Anticipate May 2001 spud.


[Page 28 depicts a diagram of the Lentic Amplitude & Structure Overlay of South
Timbalier Block 199.]

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SHIP SHOAL 225
================================================================================

                           o        3-D SEISMIC RESULTS IN RISK REDUCTION ...
                                    Interpretation of high quality seismic
                                    survey identified Bul1 amplitudes trapped
                                    downthrown to major fault.

                           o        TARGETS PRODUCTIVE IN FIELD ... Oil and gas
[DIAGRAM]                           production already established in the
                                    prospective zones (ET-FA2 sands) upthrown to
                                    the same fault in SS 225 Field.

                           o        DIVERSIFICATION OF RISK ... Negotiated trade
                                    of portion of interest in ST 199 Prospect
                                    for interest in this prospect. Mission
                                    gained an 18.75% Working Interest in SS 225
                                    Prospect as a result of the trade.

                           o        NEAR-TERM SPUD ... Anticipate first well to
                                    test this prospect will spud in May 2001.


[Page 29 depicts a Bul 1 Sand Amplitude of Ship Shoal 225.]




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EUGENE ISLAND BLOCK 310
================================================================================


                                    o ANALOG TO LARGE DEEP WATER FIELDS...Many
                                    structural and stratigraphic similarities to
                                    prolific deep water fields, but EI 310 is in
                                    only 210' foot water depth.

                                    o 3-D DOCUMENTED...A multi-block high
                                    quality 3-D seismic survey was used for
[DIAGRAM]                           interpretation.

                                    o DEVELOPED INFRASTRUCTURE...Block 310 is
                                    adjacent to our EI 292 Field with numerous
                                    pipelines nearby.

                                    o ADDITIONAL DRILLING OPPORTUNITIES...More
                                    wells can be drilled in untested fault
                                    blocks.

                                    o WELL IN PROGRESS...Expect to log before
                                    May 1, 2001.




[Page 30 depicts a diagram of Eugene Island Block 310.]

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MADISONVILLE PROSPECT
================================================================================

                                    o MULTI-ZONE PROJECT...Primary target
                                    includes development of the fractured Glen
                                    Rose "B" Limestone, with secondary
                                    objectives in the overlying Sub-Clarksville,
                                    Dexter, Buda, Georgetown and Edwards.

                                    o DIRECT ANALOG TO FT. TRINIDAD GLEN ROSE
                                    "B" FIELD...Total recovery to date is 50
                                    Bcfe from an area the same size as the
[DIAGRAM]                           Madisonville Prospect.

                                    o SIGNIFICANT ACREAGE POSITION...Bellwether
                                    holds acreage options across 10,000 acres.

                                    o 3D SEISMIC USED FOR RISK REDUCTION...
                                    Achieved through the acquisition
                                    of a 32 square mile proprietary shoot.

                                    o DEVELOPED INFRASTRUCTURE...Presence of
                                    active gas pipelines on the prospect acreage
                                    allow for immediate production and sales.

                                    o NEAR-TERM SPUD DATE...Will spud before
                                    April 1, 2001.


[Page 31 depicts a diagram of the Madisonville Prospect.]



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TRANQUILLON RIDGE UNIT
================================================================================




                                    o DIRECT ANALOG TO PT. PEDERNALES FIELD...
                                    Tranquillon is a shoreward extension of Pt.
                                    Pedernales Field. Ultimate recovery from Pt.
                                    Pedernales is estimated to be 82 MMBO and 30
                                    BCF. As of December 2000, Pt. Pedernales had
                                    produced 64 MMBO and 19 BCF.

                                    o SEISMIC INDICATES...The Tranquillion Ridge
                                    structure is larger than the Pt. Pedernales
                                    structure. The A-28 well produces oil in the
[DIAGRAM]                           lower portion of the Tranquillion Ridge
                                    structure indicating hydrocarbon
                                    accumulation

                                    o NEAR-TERM ACTIVITY...EIR baseline study is
                                    in progress with an estimated completion
                                    date of November 2001. California State
                                    Lands Commission is expected to issue the
                                    lease after completion of EIR.

                                    o LONG-TERM PLANS...First drilling in the
                                    field is projected to start in July 2002.


[Page 32 depicts a diagram of the Tranquillon Ridge Unit.]


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PORTFOLIO MANAGEMENT
================================================================================

o        Overall goals

         -        Increase portfolio value

         -        Concentrate properties in core areas

         -        Increase percentage of properties operated

         -        Reduce overall operating costs/BOE

         -        Potentially add one additional core area

o        Basic Strategy

         -        Acquire properties to which the Mission technical staff can
                  add value

         -        Divest properties which have more value to prospective
                  purchasers than they do to Mission Resources



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================================================================================




[PHOTO]                        Jonathan Clarkson

                                President & CFO






[Page 34 depicts a picture of Jon Clarkson.]

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BARGO ACQUISITION HISTORY
================================================================================



                                    Acq.      Cost Incl.  Proved   Developed
                                    Cost         Dev.    Reserves    Cost
Deal                 Properties     $MM          $MM       MMBOE   $ / BOE
- ----                 ----------     ----      ---------- --------  ---------
                                                    
Conoco I          St. Martinville  $  7.5      $ 10.6      1.9      $5.58

Conoco II         Conroe, Etc.       11.0        11.7      4.9       2.37

Phillips          Permian Basin      10.5        11.4      3.3       3.41

Texaco            Odem                8.7        10.3      1.6       6.65

Cody              Misc. Package       8.4        10.6      5.5       1.91

Exxon             Raccoon Bend       10.0        13.6      4.2       3.26

ARCO              East Texas         16.0        17.0      3.9       4.40

Texaco            Permian, Etc.     153.7       168.0     45.3       3.71

Aera              Coles Levee        10.1        10.1      4.8       2.13

All others        Various            38.4        52.9     14.9       3.53
                                   ------      ------     ----      -----

Total                              $274.3      $316.2     90.3      $3.50





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BALANCE SHEET COMPARISON ($ in millions)
================================================================================



                                      DECEMBER 31, 2000
                                 -------------------------     MISSION
                                                  MISSION     MAY 2001
                                 BELW     BARGO  PRO FORMA  EST. CLOSING
                                 ----     -----  ---------  ------------
                                                
Current Assets                     45       29        74

Property, Plant & Equipment       151      155       411

Goodwill                           --        2        27

Other Assets                       26       10        13
                                  ---      ---       ---
    Total Assets                  222      196       525
                                  ===      ===       ===


Current Liabilities                37       25        73

Bank Debt                          25       85       170          150

Sub Debt                          100       --       100          100

Deferred Tax & Other Liabilities    3        6        46

Preferred Stock                    --       58        --

Stockholders' Equity               57       22       136
                                  ---      ---       ---
    Total Liabilities & Equity    222      196       525
                                  ===      ===       ===




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FINANCIAL STRATEGY
================================================================================

o        Maintain liquidity and balance sheet capacity

         -        Limit capex in 2001 and 2002, free cash flow used to pay down
                  bank debt

         -        Utilize high yield debt to increase liquidity under senior
                  revolver

         -        Long Term objective of 50% debt to book capital and $100 MM of
                  unused bank capacity

o        Reduce cost of capital

         -        Increased liquidity in stock and analyst coverage - equity and
                  high yield

         -        Lower cost of debt capital

o        Focus on reducing G&A and LOE per BOE - divestitures, outsourcing

o        Use equity to fund acquisition transactions



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SENIOR SECURED REVOLVER
================================================================================



o       Borrower:                  Mission Resources Corporation

o       Co-Arrangers:              JPMorgan and BNP Paribas

o       Administrative Agent:      The Chase Manhattan Bank

o       Syndication Agent:         BNP Paribas

o       Facility:                  A $200 million senior secured
                                   revolver with a $20 million letter of
        credit sublimit

o       Commitment Increase
        Provision:                 Up to $300 million

o       Termination Date:          3 years





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EFFECT OF HIGH YIELD ADD-ON ON BANK DEBT
================================================================================



                                    Initial
                                 Borrowing Base
                                 --------------
                             
Sub debt less than
or equal to $100 MM                 $185.0 MM


Sub debt more than $100 MM
& less than or equal to $150 MM     $170.0 MM


Sub debt more than $150 MM
& less than or equal to $175 MM     $162.5 MM


Sub debt more than $175 MM          $155.0 MM



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BELLWETHER SENIOR SUBORDINATED NOTES
================================================================================
Issue:                         $100 million Senior Subordinated
                           Notes, issued April 1997

Coupon:                        10 7/8%

Maturity:                  10 years (2007)

Optional
Redemption:                    5 year non-call
                               (callable April 2002 @ 105.4)

Ratings
(Moody's/S&P) B3/B-


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   41


INITIATIVES WITH CAPITAL MARKETS
================================================================================

   o  Initial meetings with a number of equity and high-yield analysts over the
      past several weeks

   o  "Courtesy call" meetings with Moody's and Standard & Poor's on February 21

   o  Presentation to equity and high yield analysts on March 30 in the
      Woodlands

   o  Continued communication with markets and analysts through conferences and
      roadshows


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TRANSACTION TIMETABLE
================================================================================

     Sign merger agreement                                       Jan 25

     Preliminary S-4 proxy filed                                 Feb 1

     Bank Financing Committed                                    Mar 16

     Amended S-4 proxy filed                                     Mar 19

     Meeting for Equity & High Yield analysts                    Mar 30

     SEC approval                                                Apr 6*

     Rating agency upgrade request -
     Senior and subordinated debt                                Apr 11*

     Shareholder meeting                                         May 7*

     Close                                                       May 7*

* Projected

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   43


MAJOR SHAREHOLDERS* (amounts in millions)
================================================================================



                                        SHARES                    PERCENT
                                     FULLY DILUTED             FULLY DILUTED
                                     -------------             -------------
                                                         
BELLWETHER:
Rho Mgmt.                                1.7                        7.2%
Icahn Holding                            1.0                        4.3%
Dimensional Fund                         0.9                        3.5%
Doug Manner                              0.8                        3.3%
J.P. Bryan                               0.7                        2.8%
All others                               9.1                       37.6%
                                                                  -----
                                                                   58.7%
                                                                  -----

BARGO:
Tim Goff                                 1.8                        7.4%
Encap                                    1.7                        7.1%
Bank of America                          1.2                        5.2%
Thomas D. Barrow                         1.1                        4.7%
Kayne Anderson                           0.8                        3.3%
All others                               3.4                       13.6%
                                                                  -----
                                                                   41.3%
                                                                  -----


*Assumed 10 MM shares to Bargo shareholders
 based on $8.00/share; includes all options

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   44


FINANCE & ADMINISTRATION
================================================================================

         FUNCTIONS:
       Corporate M&A
          Finance
    Financial Reporting
            Tax
          Treasury
     Internal Auditing                  [ORGANIZATIONAL CHART]
        Accounting*
           Legal*
         Marketing*
       Administration*
      Human Resources*
   Information Technology*

* Services provided by Torch

[Page 44 depicts an organizational chart with Jon Clarkson as President and CEO,
Roland Sledge as Secretary & General Counsel, Dan Foley as Sr. V.P. Corporate
Finance, Audit Committees, Dave Johnson as Director - Internal Audit, Ann
Kaesermann as VP Chief Accounting Officer, Lance Weaver as Director Investor
Relations and Financial Analysis, and Mike Gibson as Manager - Business
Development.]

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   45


================================================================================



       [PHOTOGRAPH]                            Ann Kaesermann

                                  Vice President - Chief Accounting Officer

[Page 45 depicts a picture of Ann Kaesermann.]

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   46


FINANCIAL INFORMATION
================================================================================

    o    Bellwether Historical 2000

         -  Recurring net income excludes $17MM tax benefit and $8.6 MM loss on
            disposition of hedges

         -  Fourth quarter sale of 6.4 MMBOE of reserves producing 3,600 BOE/D,
            net

    o    Mission 2001 Estimate

         -  Pro forma; merger and major asset sale assumed at the beginning of
            the year

         -  Fourth quarter $18MM sale of non - core and marginal properties

         -  Fourth quarter $50MM acquisition - debt financed

         -  Excludes approximately $10MM of one time non-cash loss items due to
            FAS 133,  Gas plant sale and Carpatsky transaction

    o    Mission 2002 Estimate

         -  Second quarter $100MM acquisition - equity financed

         -  Second quarter $9MM non-core asset divestiture


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FINANCIAL HIGHLIGHTS
================================================================================




                                      REPORTED     PRO FORMA
                                        BELW        MISSION         MISSION
                                        2000       2001 EST.       2002 EST.
                                      --------    -----------    -------------
                                                        
Total Production (MMBOE)                 5.8       8.3 - 8.7      10.5 - 11.5

Production (MBOE/D)                     15.8         22 - 24        29 - 32

Spot WTI Price ($/BBL)                 30.14         26.53           24.15

Spot Henry Hub Price ($/MCF)            3.91         5.47            4.86

Total Revenue ($MM)                      119       200 - 210       255 - 265

OP. Cost (inc. prod. tax) per BOE       5.27      6.70 - 6.90     6.40 - 6.60

G&A per BOE                             1.58      1.55 - 1.65     1.30 - 1.40

Recurring G&A per BOE                   1.37      1.35 - 1.45     1.30 - 1.40



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   48


FINANCIAL HIGHLIGHTS
================================================================================



                                      REPORTED     PRO FORMA
                                        BELW        MISSION         MISSION
                                        2000       2001 EST.       2002 EST.
                                      --------    -----------    -------------
                                                        
Recurring EDITDA* ($MM)                  68        125 -140        170 - 185

Discretionary Cash flow ($MM)            63        95 - 105        125 - 140

         DCF/share                     4.42       4.10 - 4.50     4.25 - 4.70

Recurring Net Income* ($MM)              18        30 - 40          40 - 50

         Recurring NI*/share           1.25       1.30 - 1.70     1.35 - 1.70




*Excludes potential one time non-cash losses in 2001

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2001 ESTIMATE BY QUARTER
================================================================================



                                    FIRST         SECOND        THIRD         FOURTH
                                   QUARTER       QUARTER       QUARTER       QUARTER
                                    2001           2001         2001           2001
                                -------------  ------------  ------------   -----------
                                                                
Production (MBOE/D)                22 - 24       22 - 24       22 - 24        24 - 26

Total Revenue ($MM)                50 - 60       40 - 50       40 - 50        50 - 60

Ebitda* ($MM)                      30 - 40       25 - 35       25 - 35        30 - 40

Disc. Cash Flow ($MM)              25 - 35       20 - 30       20 - 30        25 - 35

         DCF/Share               1.10 - 1.50   .85 - 1.30     .85 - 1.30     1.10 - 1.50

Rec. Net Income* ($MM)             7 - 12        5 - 10         5 - 10         7 - 12

         Rec. NI*/Share           .30 - .50    .20 - .45      .20 - .45      .30 - .50

OP. Cost (inc. prod. Tax)
           per BOE               6.75 - 7.00   6.75 - 7.00    6.75 - 7.00    6.50 - 6.75

G&A per BOE                      1.45 - 1.55   2.20 - 2.25    1.35 - 1.45    1.30 - 1.40

Recurring G&A per BOE*           1.45 - 1.55   1.45 - 1.55    1.35 - 1.45    1.30- 1.40



*Excludes potential one time non-cash losses in 2001

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FINANCIAL HIGHLIGHTS
================================================================================



                                      REPORTED     PRO FORMA
                                        BELW        MISSION         MISSION
                                        2000       2001 EST.       2002 EST.
                                      --------    ------------   -------------
                                                        
Proved Reserves (MMBOE)                 31.6     (Jan 01) 78.5

Reserve Life (R/P)                        6             9

Cash Interest expense $MM               14.8         25 - 30        25 - 30

Total Assets $MM*                      221.5       500 - 550       550 - 600

Total Debt $MM*                        125.5       250 - 280       180 - 220

Stockholders equity $MM*                57.0       150 - 170       310 - 330

Total Book Capitalization $MM*         182.5       400 - 450       490 - 550

Recurring EBITDA **/Interest Exp.       4.6x      4.6x - 5.3x      6.0 - 6.4

Total Debt/Recurring EBITDA**           1.8x      1.8x - 2.1x     1.1x - 1.4x

Total Debt/Book Capitalization           69%        60% - 64%       35% - 40%


* As of year end
**Excludes potential one time non-cash losses in 2001

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PRICE DIFFERENTIALS
================================================================================



                                QTR 1      QTR 2      QTR 3      QTR 4     TOTAL YR
                                2001       2001       2001       2001       2002
                              --------   --------   --------   --------   --------
                                                           
OIL:
   Futures Price                28.14      26.11      26.17      25.69      24.15
   Location, Gravity, etc.      (3.70)     (3.70)     (3.90)     (3.95)     (3.60)
   Hedging                         --         --         --         --         --
                                -----      -----      -----      -----      -----
Net Realized Oil Price          24.44      22.41      22.27      21.74      20.55
                                =====      ====       =====      =====      =====
GAS:
   Futures Price                 5.60       5.34       5.42       5.52       4.86
   Location, Gravity, etc.       (.20)      (.20)      (.20)      (.20)      (.15)
   Hedging                       (.90)     (1.45)     (1.50)      (.40)        --
                                -----      -----      -----      -----      -----
Net Realized Gas Price           4.50       3.69       3.72       4.92       4.71
                                =====      ====       =====      =====      =====



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   52


HEDGING STRATEGY
================================================================================

    o  Hedge to protect downside - plan to use floors and/or collars

    o  Hedges currently in place cover about 55% of total equivalent production




OIL HEDGES                                                       NYMEX        NYMEX
- ----------
                            BBLS      % OF TOTAL                 PRICE        PRICE
       PERIOD             PER DAY      OIL PROD.     TYPE        FLOOR       CEILING
- ----------------------   ---------    ----------   ---------    -------      -------
                                                              
Jan. 2001 - Dec. 2001     1,500          12%        Collar       $24.00       $30.00
Jan. 2001 - Dec. 2001     6,000          48%         Floor       $21.00





GAS HEDGES                                                       NYMEX        NYMEX
                           BBLS       % OF TOTAL                 PRICE        PRICE
       PERIOD             PER DAY      OIL PROD.     TYPE        FLOOR       CEILING
- ----------------------   ---------    ----------   ---------    -------      -------
                                                            
Jan. 2001 - MARCH 2001    25,000         43%         Collar       $2.30        $3.37
April 2001 - Oct. 2001    35,000         60%         Collar       $2.30        $2.92



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   53


PRICE SENSITIVITIES
================================================================================



                                   2001 PRICE CHANGE               2001 PRICE CHANGE
                              --------------------------      ---------------------------
                              $1.00 / BBL     $.10 / MCF      $1.00 / BBL      $.10 / MCF
                              -----------     ----------      -----------      ----------
                                                                   
EBITDA                            $4.3 MM        $1.1 MM          $5.7 MM         $2.7 MM

Discretionary Cash Flow           $3.8 MM        $1.0 MM          $4.7 MM         $2.2 MM

   Per Share - Diluted               $.16           $.04             $.16            $.08

Net Income                        $2.6 MM        $0.7 MM          $3.4 MM         $1.6 MM

   Per Share - Diluted               $.11           $.03             $.11            $.05


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   54



================================================================================


       [PHOTOGRAPH]                        Dan Foley

                                Sr. Vice President of Corporate
                                            Finance

[Page 54 depicts a picture of Dan Foley.]

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   55


CORPORATE M&A OBJECTIVES
================================================================================


   o  Focus will be on uncovering opportunities before they reach the auction
      market

      -  Information from Board of Directors, shareholders, industry contacts
         and potential sellers

   o  Deal structures will utilize Mission Resources' common equity to the
      extent possible

      -  Potential use of bridge financing or liquidity under senior revolver
         to bridge to secondary stock offering

   o  Goal of at least one corporate transaction this year

   o  Interesting Areas include three current core areas (permian, Gulf Coast,
      Gulf of Mexico), as well as Canada, Mid continent, Rockies, and South
      Texas

      -  No foreign acquisitions

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   56


SMALL - CAP E&P COMPANIES - LOW VALUATIONS / UNDERFOLLOWED
================================================================================

                                  PARTIAL LIST


                                               
          Carrizo Oil & Gas                       Miller Exploration

          Chaparral Resources                     National Energy Corp.

          Clayton Williams                        North Coast Energy

          Coho Energy                             Panaco

          Devx Energy                             Petrocorp

          Hallwood Energy                         Petroquest

          Inland Resources                        Pyr Energy

          KCS Energy                              Remington Oil & Gas

          Key Production                          Southern Mineral

          Maynard Oil                             Wiser Oil




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   57


UMC CORPORATE ACQUISITION HISTORY
================================================================================

                                  [LINE GRAPH]


[Page 57 depicts a line graph of UMC Corporate Acquisition History. The vertical
axis measures Proved Reserves (MMBOE)(from 0-300) and the horizontal axis
measures years (from 1986-1997).]

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   58


ADMINISTRATIVE FUNCTIONS
================================================================================


     o   Torch, Novistar and others will provide financial and administrative
         services for Mission Resources as follows:

         -   Accounting and Information Technology

         -   Human Resources

         -   Corporate Secretary

         -   AFE administration

         -   Risk Management

         -   Oil and Gas Marketing

     o   Management is reviewing the terms of these services and quality of
         service to maximize the benefit to Mission Resources

         -   Renegotiate contracts given expanded size of company

         -   Potentially bring some functions in-house

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   59



                            [MISSION RESOURCES LOGO]


[Page 59 depicts the Mission Resource's logo.]