SANTA FE SNYDER CORP
424B2, 1999-08-04
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>   1

                                                Filed pursuant to Rule 424(b)(2)
                                                              Reg. No. 333-78265


            Prospectus Supplement to Prospectus dated July 19, 1999.

                                 11,000,000 Shares

                            SANTA FE SNYDER CORPORATION

 [Santa Fe Snyder Logo]           Common Stock

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

     The common stock is listed on the New York Stock Exchange under the symbol
"SFS". The last reported sale price of the common stock on August 3, 1999 was
$9 1/8 per share.

     See "Risk Factors" on page S-13 to read about factors you should consider
before buying shares of the common stock.

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

     NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY OTHER REGULATORY
BODY HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR PASSED UPON THE ACCURACY
OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL
OFFENSE.

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

<TABLE>
<CAPTION>
                                                              Per Share           Total
                                                              ---------           -----
<S>                                                           <C>              <C>
Initial price to public.....................................   $9.0625         $99,687,500
Underwriting discount.......................................   $0.5000         $ 5,500,000
Proceeds, before expenses, to Santa Fe Snyder...............   $8.5625         $94,187,500
</TABLE>

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

     To the extent that the underwriters sell more than 11,000,000 shares of
common stock, the underwriters have the option to purchase up to an additional
1,650,000 shares from Santa Fe Snyder at the initial price to public less the
underwriting discount.

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

     The underwriters expect to deliver the shares against payment in New York,
New York on August 9, 1999.

GOLDMAN, SACHS & CO.                                  CREDIT SUISSE FIRST BOSTON
                             ----------------------

                  Prospectus Supplement dated August 3, 1999.
<PAGE>   2

                         PROSPECTUS SUPPLEMENT SUMMARY

     This summary highlights information appearing in other sections of this
prospectus supplement or the accompanying prospectus. It may not contain all of
the information that is important to you. This prospectus supplement and the
accompanying prospectus include or incorporate by reference information about
this offering, our business and our financial and operating data. We encourage
you to read the entire prospectus supplement and the accompanying prospectus
carefully, including the "Risk Factors" section and the financial statements and
the footnotes to those statements incorporated by reference in this document
before making an investment decision. Unless otherwise specified, all
production, reserve and operating data contained in this prospectus supplement
summary are presented on a pro forma combined basis giving effect to the merger
of Snyder Oil Corporation into Santa Fe Energy Resources, Inc.

                          SANTA FE SNYDER CORPORATION

                                    GENERAL

     Santa Fe Snyder Corporation is a large independent oil and gas company with
operations in the United States, Southeast Asia, South America and West Africa.
Santa Fe Snyder was formed by the merger on May 5, 1999 of Snyder Oil
Corporation into Santa Fe Energy Resources, Inc. We are among the 15 largest
independent exploration and production companies in the United States based on
reported proved reserves. At year-end 1998, we had estimated proved reserves of
315 million barrels of oil equivalent (MMBOE) and during 1998 we produced at an
average rate of 101 thousand barrels of oil equivalent (MBOE) per day.

     We have a balanced asset base with significant exploitation inventory and
exploration potential. Approximately 71% of our net average daily production for
the quarter ended June 30, 1999 is derived from our domestic properties and 50%
of our total net average daily production is composed of natural gas. Our
reserves are geographically diversified, with domestic reserves comprising about
65% of our 1998 year-end proved reserves. This asset diversification is key in
reducing our overall risk profile of current production by diversifying revenue
and cash flow sources. Furthermore, 95% of our natural gas reserves are located
in the United States, the most developed natural gas market in the world.

     Our domestic properties are located in three core areas, including the
Permian Basin region in West Texas and Southeastern New Mexico, the Rocky
Mountains, and the Gulf of Mexico. Our international operations are located in
five core areas, including Indonesia, Argentina, Gabon, Brazil and China, with
other interests in the Cote d'Ivoire, Malaysia, Thailand and Ghana. We have
recently placed discoveries in Indonesia and Gabon on production.

                              OUR CORE PROPERTIES

     The following table sets forth our net average daily production rate during
1998 and estimated net proved reserves as of December 31, 1998 for our core
domestic and international properties.

<TABLE>
<CAPTION>
                                        ESTIMATED
                         1998 NET          NET
                          AVERAGE         PROVED
                           DAILY       RESERVES AT
                        PRODUCTION     DECEMBER 31,
                           RATE            1998
                        ----------     ------------
                          (MBOE)         (MMBOE)
<S>                    <C>             <C>
Core Domestic Areas:
  Permian Basin......       29.1           81.9
  Rocky Mountains....       15.0           78.0
  Gulf of Mexico.....       33.3           42.1
Core International
  Areas:
  Indonesia..........       12.3           60.8
  Argentina..........        9.7           25.7
  Gabon..............        1.8           12.8
  Brazil.............         --           13.9
  China..............         --             --
                           -----          -----
         Total:......      101.2          315.2
</TABLE>

     Production in Brazil is expected to commence in the year 2000 and
production in China is expected to commence in the year 2001.

                                       S-1
<PAGE>   3

     DOMESTIC OPERATIONS -- The majority of our current domestic proved reserves
and production is located in the Permian Basin, the Rocky Mountains, and the
Gulf of Mexico. Our domestic production in 1998 totaled 77.4 MBOE per day, or
76% of our total production.

     - PERMIAN BASIN: Our West Texas properties consist primarily of long-lived
       enhanced oil recovery properties in mature fields where we are engaged in
       development activities through the use of secondary waterfloods and
       tertiary CO(2) floods. Our Southeastern New Mexico properties consist of
       shorter life oil and gas properties in the primary phase of production.
       Our 1998 production in the Permian Basin consisted of approximately 39%
       natural gas. During 1998, approximately 29% of our total production came
       from the Permian Basin.

     - ROCKY MOUNTAINS: The Rocky Mountain region represents 39% of our domestic
       proved reserves. These estimated reserves are 78% natural gas. We drilled
       61 Rocky Mountain wells (44.6 net) in 1998, of which 59 were development
       and 2 were exploratory, continuing our commitment to long-term growth in
       the region. Our 1998 capital program in the Rocky Mountains was directed
       primarily to our natural gas development projects in the Washakie and
       Wind River Basins. During 1998, approximately 15% of our total production
       came from the Rocky Mountain region.

     - GULF OF MEXICO: Our offshore properties are primarily located in the
       shallow waters of the Gulf of Mexico, and are concentrated in the Main
       Pass area and the South Timbalier complex. We drilled a total of 33 wells
       (10.9 net) in this region during 1998. During 1998, approximately 33% of
       our total production came from the Gulf of Mexico region.

     INTERNATIONAL OPERATIONS -- Our 1998 international production reflected an
86% increase on a BOE basis from our average production rate in 1997. Crude oil
and liquids comprised approximately 95% of our international proved reserves at
year-end 1998. We participated in 61 gross (19.5 net) development wells in 1998,
of which 59 (18.9 net) were successful. Our international development
expenditures in 1998 were approximately $70 million. We expect these
expenditures to be slightly higher in 1999, primarily due to:

     - the continuation of development projects on our Jabung and Tuban Blocks
       in Indonesia and on our Kowe Block in Gabon;

     - the drilling in China of an appraisal well associated with our 1998
       discovery; and

     - the commencement of a new development project offshore Brazil consisting
       of six separate fields previously discovered by the Brazilian oil
       company, Petrobras.

     The following is a brief description of our core international areas:

     - INDONESIA: In 1998, our Indonesian production was derived from four
       producing concessions. We sell our Indonesian oil production for U.S.
       dollars to markets outside Indonesia, except for our production from the
       Jabung Block, which we sell to the Indonesian state oil company,
       Pertamina.

     - ARGENTINA: Our Argentine oil production comes from our 22% working
       interest in the El Tordillo field in the San Jorge Basin and our 100%
       working interest in the Tupungato field in the Cuyo Basin. Our natural
       gas production comes from our 20% working interest in the Sierra Chata
       field in the Neuquen Basin.

     - GABON: We commenced oil production in January 1998 from the Tchatamba
       Marine field in the offshore Kowe Block. We own an 18.75% participatory
       interest, net of the Gabonese government's 25% interest, in the
       exploitation license area covering the Tchatamba Marine field, and a 25%
       participatory interest in the
                                       S-2
<PAGE>   4

       remainder of the block's exploration area.

     - BRAZIL: In December 1998, we entered into a contract with Petrobras to
       develop the Carauna Block in the Potiguar Basin offshore Brazil. We
       operate this block and own a 51.4% working interest. During 1999, we plan
       to re-enter several wells previously drilled by Petrobras. The drilling
       of two appraisal wells is also budgeted for 1999.

     - CHINA: Our first operated offshore well in China, the Ursa Prospect
       PY4-2-1 on Block 15/34, was successfully completed as a discovery in
       April 1998. In September and October 1998, we acquired a 1,600 square
       kilometer 3-D survey across Block 15/34 in which we own a 50% working
       interest.

                               BUSINESS STRATEGY
                           AND COMPETITIVE STRENGTHS

     We have a superior record of production and reserve growth both in the
United States and internationally with a large exploitation inventory and a
substantial portfolio of exploration prospects to support future growth. Our
capital structure provides cost-effective financing capacity and flexibility for
funding continued growth in North America and international areas. We plan to
continue our disciplined growth through the following strategy:

     - grow our reserves and production through the drill bit, emphasizing
       international growth, with targeted growth in international production
       expected to average 20% over the five years ending December 31, 2003;

     - pursue selective acquisitions of geographically concentrated assets with
       significant exploitation potential in a cost-effective manner;

     - continue to improve our financial flexibility; and

     - continue to maintain a low cost structure.

     We plan to implement this strategy by emphasizing the following key
competitive strengths:

     - LARGE INVENTORY OF DEVELOPMENT AND EXPLORATION OPPORTUNITIES.
       Domestically, we have identified 170 onshore development drilling
       locations in the Rocky Mountains and Permian Basin to be drilled over the
       next 24 months and we plan to drill 20 development and exploration wells
       in the Gulf of Mexico during 1999. We are continuing the development of
       our international discoveries in Indonesia, China, Gabon and Argentina
       and the exploitation of our properties in Brazil. In addition, we have
       exploration prospects in China, Thailand, Malaysia, Ghana and Brazil.
       Internationally, our strategy emphasizes geological discipline, multiple
       targets, moderate risk, and timely development.

     - FINANCIAL STRENGTH AND FLEXIBILITY. Our capitalization allows us to
       access the capital necessary to cost-effectively fund the development and
       exploration of our projects. We plan to:

       -- maintain our strong balance sheet;

       -- minimize our cost of funding;

       -- maximize our financial and operating flexibility; and

       -- achieve credit ratings consistent with our financial strength.

      In connection with our recent merger, we:

       -- entered into a new $500 million credit facility;

       -- redeemed all of the $100 million principal amount of our 11% senior
          subordinated debentures due 2004; and

       -- issued $125 million of 8.05% senior notes due 2004 to pay the
          redemption price of the debentures.

     - LOW COST STRUCTURE. We believe that our finding and development costs,
       which averaged $4.94 per barrel during 1998, are among the lowest in the
       industry. We plan to focus our cost reduction efforts on reducing lease

                                       S-3
<PAGE>   5

operating expenses, general and administrative expenses and interest expense,
and divesting higher cost properties.

     - BALANCED ASSET BASE. Our reserve base is 59% oil and 41% natural gas.
       Sixty-four percent of our proved reserves are domestic and 36% are
       international. Our domestic core areas of operation are the Permian
       Basin, the Rocky Mountains and the Gulf of Mexico and our international
       core areas are South America, West Africa, China and Southeast Asia.

                              RECENT DEVELOPMENTS

     PENDING PROPERTY ACQUISITIONS -- On July 16, 1999 we entered into an
agreement with Shell Deepwater Development, Inc. ("SDDI"), a subsidiary of Shell
Oil Company, to purchase a portion of the interests owned by SDDI in the Angus,
El Toro and Macaroni fields and to create an exploration area of mutual interest
between the two companies. All of the interests that we are acquiring are in the
deepwater Gulf of Mexico. The total purchase price of the interests is
approximately $210 million, of which $185 million is payable in cash at closing,
which price gives effect to our agreement to treat the purchases as if they
occurred as of January 1, 1999. The remaining $25 million will be incurred
during the balance of 1999 for development expenditures.

     We estimate that the properties we will acquire in the SDDI acquisition
have proved reserves as of June 30, 1999 of:

     - 29 MMBbls of crude oil; and

     - 48 Bcf of natural gas; or

     - a total of 37 MMBOE, of which 78% is oil and 22% natural gas.

     Production from the fields in 2000 is expected to be 9 MBbls per day and
14.5 MMcf per day or a total of 11.5 MBOE per day, net to our interest.
Production is expected to commence from the Angus and Macaroni fields in
September 1999 and from the El Toro field in March 2001. Multiple pay horizons
and facility constraints contribute to the long life of these fields, as
compared to the typically shorter production life of offshore Gulf of Mexico
properties in the continental shelf.

     The Angus field and joint participating area consists of Green Canyon
Blocks 111, 112, 113, 155, 156 and 157. We are purchasing a 15% working interest
in this area, which is located approximately 150 miles offshore the coast of
Louisiana in approximately 1,500 to 2,100 feet of water. A total of three wells
have been drilled in this area and SDDI is the operator. We also agreed to form
an area of mutual interest with SDDI covering the Angus joint participating area
and the El Toro field for two years after the last lease covering this area
expires.

     The El Toro field is located in the same basin as the Angus field offshore
the coast of Louisiana in approximately 1,400 feet of water. This field is
located in Green Canyon Blocks 68 and 69. The field was discovered by SDDI in
1998 and one well has been drilled in this field. We will be acquiring a 49%
working interest in this field and SDDI will continue as the operator.

     The Macaroni field is located approximately 225 miles offshore the coast of
Louisiana in approximately 3,700 feet of water and is located in Garden Banks
Block 602. SDDI discovered the Macaroni field in 1998 and two wells have been
drilled. We are purchasing a 15% working interest in this field. We have also
agreed to form an area of mutual interest with SDDI covering Garden Banks Blocks
555, 556, 557, 599, 600, 601, 644, 645 and 646 for two years after the last
lease covering this area expires.

     Further, we have agreed to drill one exploratory well in the El Toro deep
formation and to carry SDDI for a 51% working interest share of the abandonment
costs or costs to casing point up to a maximum expenditure of $5 million net to
SDDI's carried interest.

     The SDDI transaction has been approved by the board of directors of Santa
Fe Snyder and is not subject to financing. We expect that all remaining
conditions under the purchase agreement will be satisfied and that the
acquisition will be completed in August 1999. However, we cannot be sure that
the transaction will be completed as expected until it is actually consummated.
                                       S-4
<PAGE>   6

     We expect to use the net proceeds from this offering, together with
approximately $100 million prepayment proceeds from a three-year forward sale of
approximately 6 MMBbls of our future oil production to fund the purchase price
and estimated development expenditures during the balance of 1999 associated
with the pending property acquisition from SDDI.

     PRELIMINARY RESULTS FOR THE SECOND QUARTER OF 1999 -- On July 19, 1999 we
announced preliminary results for our second quarter ended June 30, 1999, which
includes the first two months of combined operations of Santa Fe Energy
Resources and Snyder Oil Corporation.

     THREE MONTHS ENDED JUNE 30, 1999. In the second quarter of 1999, we had net
earnings of $2.8 million, or $0.02 per share, before recognition of $150.8
million of non-recurring charges, net of tax, related to the May 5, 1999 merger.
Including these charges, we reported a net loss of $148.0 million, or $1.02 per
common share. The merger was accounted for as a purchase transaction and
included a pretax property impairment charge of $196.4 million which was based
primarily on our long-term outlook for future commodities prices.

     Our revenues increased $112.4 million, driven by a 10% increase in realized
commodity prices and a 29% increase in production due to the merger. Our oil
production averaged 47 MBbls per day and our natural gas production increased to
281 MMcf per day principally as a result of the merger-related addition of
Snyder Oil's predominately domestic gas production. Our domestic production in
the second quarter of 1999 was 64% natural gas and 36% oil. During the three
months ended June 30, 1999, we realized average crude oil prices of $15.06 per
barrel, including a $0.05 hedging loss. The average price for natural gas for
the quarter was $1.92 per Mcf, including a $0.04 hedging loss. Primarily as a
result of the merger, our gas production increased more than 50% and our
operating costs per BOE decreased by 7% from the first quarter. At June 30,
1999, our average daily production was 48 MBbls of oil and 320 MMcf of gas.

     SIX MONTHS ENDED JUNE 30, 1999. For the six months ended June 30, 1999, we
reported a net loss of $160.1 million or $1.29 cents per share, which was
primarily due to the impairment charge and the historically low commodity prices
realized during the first quarter of 1999. Total revenues for the six-month
period were $180.6 million due to higher second quarter oil and gas production
from the merger. Total costs and expenses increased to $391.8 million during the
first six months of 1999, primarily due to merger-related costs.

     Increased oil production from Indonesia and Gabon and domestic additions
primarily from the merger resulted in a 20% increase in overall production to
46.1 MBbls per day. Also as a result of the merger, overall gas production for
the first half of 1999 increased 28% to 231 MMcf per day. We realized average
oil prices of $13.01 per barrel, including a $0.02 hedging loss, and average
natural gas prices of $1.79 per Mcf, including a $0.03 hedging loss.

                                       S-5
<PAGE>   7

     The financial information for the three-month and the six-month periods
ended June 30, 1999 reflects Santa Fe Snyder's results giving effect to the
merger of Snyder with Santa Fe on May 5, 1999, whereas the June 30, 1998
financial information reflects Santa Fe Energy Resources, Inc.'s historical
results on a stand-alone basis.

<TABLE>
<CAPTION>
                                                        THREE MONTHS ENDED        SIX MONTHS ENDED
                                                             JUNE 30,                 JUNE 30,
                                                      ----------------------    ---------------------
                                                        1998         1999         1998        1999
                                                      --------    ----------    --------    ---------
                                                      (UNAUDITED, IN MILLIONS, EXCEPT PER SHARE DATA)
<S>                                                   <C>         <C>           <C>         <C>
Revenues............................................    $77.8       $ 112.4      $146.6      $ 180.6
Operating costs and expenses........................     77.0          98.2       151.1        178.6
Merger-related costs................................       --          16.8          --         16.8
Impairment of oil and gas
  properties........................................       --         196.4          --        196.4
                                                        -----       -------      ------      -------
Income (loss) from operations.......................       .8        (199.0)       (4.5)      (211.2)
Interest expense....................................      5.3          10.7         9.1         17.5
Other (income) expense..............................     (2.8)         (1.5)       (6.7)        (3.2)
                                                        -----       -------      ------      -------
Loss before income taxes and extraordinary item-debt
  extinguishment....................................     (1.7)       (208.2)       (6.9)      (225.5)
Income tax benefit..................................      2.1          64.4         7.0         69.6
                                                        -----       -------      ------      -------
Net income (loss) before extraordinary item-debt
  extinguishment....................................       .4        (143.8)        0.1       (155.9)
Extraordinary item-debt extinguishment..............       --          (4.2)         --         (4.2)
                                                        -----       -------      ------      -------
Net loss............................................    $  .4       $(148.0)     $  0.1      $(160.1)
                                                        =====       =======      ======      =======
Net loss per common share-basic and diluted:
  Loss before extraordinary item....................       --       $  (.99)         --      $ (1.26)
  Extraordinary item-debt extinguishment............       --          (.03)         --        (0.03)
                                                        -----       -------      ------      -------
Net loss per share..................................       --       $ (1.02)         --      $ (1.29)
                                                        =====       =======      ======      =======
</TABLE>

                                       S-6
<PAGE>   8

                                  THE OFFERING

     The common stock information set out in this paragraph assumes that the
underwriters do not exercise the option granted by Santa Fe Snyder to purchase
1,650,000 additional shares of common stock in connection with the offering, as
discussed under "Underwriting."

Shares offered by Santa Fe Snyder...     11,000,000.

Approximate number of common shares
  outstanding after this offering...     181,996,985, excluding 14,223,464
                                         shares of common stock issuable upon
                                         exercise of outstanding vested options.

New York Stock Exchange trading
symbol..............................     SFS

Use of Proceeds.....................     We will add the net proceeds of this
                                         offering to working capital and use
                                         them for general corporate purposes,
                                         including repayment of debt. In
                                         particular, we expect to use the
                                         approximately $93.9 million net
                                         proceeds from this offering, together
                                         with approximately $100 million of
                                         prepayment proceeds from a three-year
                                         forward sale of approximately 6 MMBbls
                                         of oil of our future oil production, to
                                         fund the purchase price and estimated
                                         development expenditures for the
                                         balance of 1999 associated with the
                                         pending property acquisition from SDDI
                                         discussed under "Recent
                                         Developments -- Pending Property
                                         Acquisitions." Pending the use of the
                                         net proceeds from this offering to pay
                                         a portion of the pending property
                                         acquisition from SDDI, we will reduce
                                         borrowings under our credit facility.

                                       S-7
<PAGE>   9

         SUMMARY UNAUDITED PRO FORMA COMBINED CONDENSED FINANCIAL DATA

     The following table sets forth summary unaudited pro forma combined
condensed financial data that is presented to give effect to the merger on May
5, 1999 of Snyder with and into Santa Fe. The information was prepared based on
the following assumptions:

     - The merger has been accounted for as a purchase business combination
       under generally accepted accounting principles.

     - The income statement data is presented as if the merger had been
       consummated on January 1, 1998.

     - The balance sheet data is presented as if the merger had been consummated
       on March 31, 1999.

     You should consider the following:

     - The unaudited pro forma combined condensed financial data is not
       necessarily indicative of the results of operations or the financial
       position that would have occurred had the merger been consummated on
       January 1, 1998, nor is it necessarily indicative of future results of
       operations or financial position.

     - The unaudited pro forma combined condensed financial data excludes the
       cost savings expected to be realized through the consolidation of the
       corporate headquarters of the two companies and the elimination of
       duplicate staff and expenses.

     The unaudited pro forma combined condensed financial statements should be
read together with the pro forma financial information giving effect to the
merger incorporated by reference in this document from our Current Report on
Form 8-K/A filed on May 25, 1999 and the historical consolidated financial
statements of Santa Fe and Snyder and the unaudited pro forma condensed combined
financial statements incorporated by reference in this prospectus supplement or
the accompanying prospectus. See "Where You Can Find More Information" in the
accompanying prospectus.

<TABLE>
<CAPTION>
                                                                        THREE MONTHS
                                                                            ENDED
                                                    YEAR ENDED            MARCH 31,
                                                   DECEMBER 31,       -----------------
                                                       1998            1998      1999
                                                   ------------        ----      ----
                                                   (IN MILLIONS, EXCEPT PER SHARE DATA)
<S>                                                <C>                <C>      <C>
INCOME STATEMENT DATA
Revenues.........................................    $  429.0         $102.5   $   98.8
Production and operating expenses................       146.8           32.3       35.8
Exploration expenses.............................       119.4           15.4       23.1
General and administrative.......................        36.1            8.6        9.7
Depreciation, depletion, and amortization........       215.9           45.6       51.9
Impairments......................................        93.3             --         --
Loss from operations.............................      (204.5)          (5.3)     (26.4)
Interest expense, net............................        30.5            6.0        9.9
Net loss.........................................      (140.2)          (2.2)     (23.8)
Net loss per common share:
  Basic..........................................    $ (0.82)         $(0.01)  $  (0.14)
  Diluted........................................    $ (0.82)         $(0.01)  $  (0.14)
Weighted average number of shares outstanding....       171.1          171.2      170.7
                                                     ========         ======   ========
BALANCE SHEET DATA (AT END OF PERIOD)
Properties and equipment, net....................                              $1,452.6
Total assets.....................................                               1,638.8
Long-term debt...................................                                 567.8
Stockholders' equity.............................                                 763.1
</TABLE>

                                       S-8
<PAGE>   10

          SUMMARY HISTORICAL CONSOLIDATED FINANCIAL AND OPERATING DATA

                        SANTA FE ENERGY RESOURCES, INC.

     The following table sets forth selected historical financial information of
Santa Fe Energy Resources for the five years ended December 31, 1998 and for the
three months ended March 31, 1999 and 1998. This financial information was
derived from the consolidated financial statements of Santa Fe. This data should
be read in conjunction with the consolidated financial statements of Santa Fe
and Management's Discussion and Analysis of Financial Condition and Results of
Operations contained in the reports incorporated by reference in this document.

     On July 25, 1997, Santa Fe Energy Resources completed the spin-off of
Monterey Resources, Inc., which comprised substantially all of the assets and
properties of Santa Fe's western division. The consolidated financial statements
for the year ended December 31, 1997 include seven months of Monterey's results.

<TABLE>
<CAPTION>
                                                                                        THREE MONTHS
                                                                                            ENDED
                                                                                          MARCH 31,
                                                YEAR ENDED DECEMBER 31,                  (UNAUDITED)
                                   -------------------------------------------------   ---------------
                                     1994       1995       1996      1997     1998      1998     1999
                                     ----       ----       ----      ----     ----      ----     ----
                                                  (IN MILLIONS, EXCEPT PER SHARE DATA)
<S>                                <C>        <C>        <C>        <C>      <C>       <C>      <C>
INCOME STATEMENT DATA
Revenues.........................  $  404.2   $  449.4   $  583.3   $514.7   $ 291.0   $ 68.8   $ 68.2
Production and operating
  expenses.......................     162.8      162.3      209.2    180.9     112.5     25.3     28.3
Exploration expenses.............      20.4       23.4       34.5     49.1      71.1     12.2     11.2
General and administrative.......      27.3       26.9       30.1     28.1      19.7      4.4      5.4
Depreciation, depletion and
  amortization...................     121.3      133.2      148.2    127.8     136.1     28.1     31.9
Impairments......................        --       30.2       57.4       --      87.8       --       --
Income (loss) from operations....      48.2       53.9       89.5    110.8    (154.0)    (5.3)   (12.2)
Interest expense, net............      23.9       26.7       32.4     17.1      14.8      2.1      5.5
Income (loss) before
  extraordinary item.............      17.1       26.6       42.4     54.7     (98.7)    (0.3)   (12.1)
Extraordinary item...............        --         --       (6.0)      --        --       --       --
Net income (loss)................      17.1       26.6       36.4     54.7     (98.7)    (0.3)   (12.1)
Earnings (loss) attributable to
  common shares..................  $    5.4   $   11.8   $  (10.8)  $ 42.7   $ (98.7)  $ (0.3)  $(12.1)
Basic and diluted per share data
  Before extraordinary item......  $   0.06   $   0.13   $  (0.05)  $ 0.43   $ (0.96)      --   $(0.12)
  Extraordinary item-- debt
    extinguishment...............        --         --      (0.07)      --        --       --       --
  Per common share...............  $   0.06   $   0.13   $  (0.12)  $ 0.43   $ (0.96)      --   $(0.12)
Weighted average number of shares
  outstanding....................      89.9       90.2       90.6     98.6     102.6    102.7    102.2
STATEMENT OF CASH FLOWS DATA
Net cash provided by operating
  activities.....................     124.5      174.5      228.1    254.6     115.1     14.5     30.4
Net cash provided by (used in)
  investing activities...........     (57.7)    (160.8)    (206.8)  (375.6)   (307.5)   (69.0)   (62.1)
Net cash provided by (used in)
  financing activities...........     (17.9)     (24.8)     (49.3)   112.0     198.9     52.6     31.1
BALANCE SHEET DATA (AT PERIOD
  END)
Properties and equipment, net....  $  843.0   $  889.5   $  909.8   $649.7   $ 718.3   $676.7   $701.4
Total assets.....................   1,081.0    1,073.8    1,129.1    788.9     859.0    815.1    844.0
Long-term debt...................     350.4      344.4      278.5    121.7     330.6    178.8    361.9
Convertible preferred stock......      80.0       80.0       19.7       --        --       --       --
Stockholders' equity.............     423.3      437.7      526.8    454.7     348.4    450.7    336.5
</TABLE>

                                       S-9
<PAGE>   11

                             SNYDER OIL CORPORATION

     The following table sets forth selected historical financial information of
Snyder for the five years ended December 31, 1998 and the three months ended
March 31, 1999 and 1998. This financial information was derived from the
consolidated financial statements of Snyder. This data should be read in
conjunction with the consolidated financial statements of Snyder and
Management's Discussion and Analysis of Financial Condition and Results of
Operations contained in the reports incorporated by reference in this document.

     The following table includes the results of Patina Oil and Gas Corporation
through the third quarter of 1997 when Snyder sold its interest in Patina.

<TABLE>
<CAPTION>
                                                                                    THREE MONTHS
                                                                                        ENDED
                                                                                      MARCH 31,
                                               YEAR ENDED DECEMBER 31,               (UNAUDITED)
                                      ------------------------------------------   ---------------
                                       1994     1995     1996     1997     1998     1998     1999
                                       ----     ----     ----     ----     ----     ----     ----
                                                  (IN MILLIONS, EXCEPT PER SHARE DATA)
<S>                                   <C>      <C>      <C>      <C>      <C>      <C>      <C>
INCOME STATEMENT DATA
Revenues............................  $262.3   $197.3   $285.1   $255.7   $141.1   $ 33.7   $ 31.0
Production and operating expenses...   140.4     81.9     64.7     55.2     41.8      8.8      9.0
Exploration expenses................     6.5      8.0      4.2     17.0     48.3      3.2     11.9
General and administrative..........    12.9     17.7     17.1     20.4     16.4      4.2      4.3
Depreciation, depletion and
  amortization......................    70.8     76.4     84.5     79.9     54.0     11.8     13.9
Impairments.........................     5.8     27.4      2.8      7.3      5.5       --       --
Interest expense, net...............    10.3     21.7     23.6     25.5     15.7      3.9      4.4
Income (loss) before extraordinary
  item..............................    12.4    (39.8)    63.0     35.5    (24.7)     1.8     (8.1)
Extraordinary item..................      --       --       --     (2.8)      --       --       --
Net income (loss)...................    12.4    (39.8)    63.0     32.6    (24.7)     1.8     (8.1)
Earnings (loss) attributable to
  common shares.....................  $  1.6   $(46.0)  $ 56.7   $ 26.6   $(24.7)  $  1.8   $ (8.1)
Diluted per share data
  Before Extraordinary item.........  $ 0.07   $(1.53)  $ 1.81   $ 0.96   $(0.74)  $ 0.06   $(0.24)
  Extraordinary Item................      --       --       --    (0.09)      --       --       --
  Per common share..................  $ 0.07   $(1.53)  $ 1.72   $ 0.86   $(0.74)  $ 0.06   $(0.24)
Weighted average number of shares
  outstanding.......................    23.7     30.2     31.3     30.6     33.4     33.4     33.4
STATEMENT OF CASH FLOWS DATA
Net cash provided by operating
  activities........................    86.4     69.1    101.7    122.0     75.2     21.3     13.7
Net cash provided by (used in)
  investing activities..............  (245.5)    32.4    (62.4)    31.8   (188.3)   (37.5)    (0.7)
Net cash provided by (used in)
  financing activities..............   169.9    (96.0)   (38.7)    92.3     29.8     (0.8)    (7.9)
BALANCE SHEET DATA (AT PERIOD END)
Properties and equipment, net.......  $557.5   $454.0   $651.7   $289.1   $374.3   $302.1   $346.0
Total assets........................   673.3    555.5    879.5    546.1    433.9    515.8    409.0
Long-term debt......................   300.0    234.1    372.1    173.6    212.8    173.7    206.8
Convertible preferred stock.........    10.0     10.0     10.0       --       --       --       --
Shareholders' equity................   274.1    235.4    294.7    263.8    128.4    248.1    116.3
Cash dividends declared on common
  stock.............................  $ 0.25   $ 0.26   $ 0.26   $ 0.26   $ 0.26   $0.065   $0.065
</TABLE>

                                      S-10
<PAGE>   12

        SUMMARY HISTORICAL AND PRO FORMA OIL AND GAS RESERVE INFORMATION

     The following table sets forth summary information on Santa Fe's and
Snyder's proved oil and gas reserves at December 31, 1998, and the summary pro
forma combined information on proved oil and gas reserves, assuming the merger
had taken place on December 31, 1998. Snyder's and Santa Fe's historical, and
Santa Fe Snyder's pro forma combined, proved oil and gas reserve information set
forth below and incorporated by reference in this document are only estimates
based primarily on reports prepared by independent petroleum engineers as of
December 31, 1998. The reserve information as of December 31, 1998 is based on
the prices of oil and gas as of that time. The discounted future net cash flows
set forth or incorporated by reference in this document should not be considered
as the current market value of the estimated oil and gas reserves attributable
to Snyder's or Santa Fe's properties. Under the applicable requirements of the
Securities and Exchange Commission, the estimated discounted future net cash
flows from proved reserves are generally based on prices and costs as of the
date of the estimate, while actual future prices and costs may be materially
higher or lower. In addition, the 10% discount factor, which is required by the
Securities and Exchange Commission to be used to calculate discounted future net
cash flows for reporting purposes, is not necessarily the most appropriate
discount factor based on interest rates periodically in effect and risks
associated with Santa Fe Snyder or the oil and gas industry in general.

<TABLE>
<CAPTION>
                                                                        NATURAL   BARRELS OF
                                                            CRUDE OIL     GAS     EQUIVALENTS
                                                            ---------   -------   -----------
                                                            (MMBBLS)     (BCF)      (MMBOE)
<S>                                                         <C>         <C>       <C>
NET PROVED RESERVES:
Santa Fe (Historical):
  Developed...............................................    110.1      229.8       148.4
  Undeveloped.............................................     58.5       48.3        66.5
                                                              -----      -----       -----
          Total...........................................    168.6      278.1       214.9
                                                              =====      =====       =====
Snyder (Historical):
  Developed...............................................     17.4      392.0        82.7
  Undeveloped.............................................      1.2       98.8        17.6
                                                              -----      -----       -----
          Total...........................................     18.6      490.8       100.3
                                                              =====      =====       =====
Santa Fe Snyder (Pro Forma Combined):
  Developed...............................................    127.5      621.8       231.1
  Undeveloped.............................................     59.7      147.1        84.1
                                                              -----      -----       -----
          Total...........................................    187.2      768.9       315.2
                                                              =====      =====       =====
</TABLE>

<TABLE>
<CAPTION>
                                                              SANTA FE   SNYDER
                                                              --------   ------
<S>                                                           <C>        <C>
RESERVE VALUATION INFORMATION (IN MILLIONS):
  Estimated Future Net Cash Flows (before income taxes).....   $869.8    $663.5
  Present Value of Future Net Cash Flows (before income
     taxes) discounted at 10%...............................   $518.5    $365.6
  Standardized Measure of Discounted Future Net Cash
     Flows..................................................   $482.0    $322.2
</TABLE>

                                      S-11
<PAGE>   13

                             SUMMARY OPERATING DATA

     The following table sets forth summary pro forma combined production data,
average realized prices and production costs per BOE for each of the five years
in the period ended December 31, 1998 and for the three months ended March 31,
1999.

     For the four years ended December 31, 1997, the following table includes
production, sales prices and production costs attributable to Monterey
Resources, which was spun off by Santa Fe in July 1997, and Patina Oil and Gas,
which was sold by Snyder in the third quarter of 1997.

     Combined daily production of oil equivalent barrels of Monterey and Patina
for the years ended December 31, 1994, 1995, 1996 and 1997 was 41.9, 42.7, 67.5
and 42.8 MBOE, respectively.

<TABLE>
<CAPTION>
                                                                              THREE MONTHS
                                                                                 ENDED
                                          YEARS ENDED DECEMBER 31,             MARCH 31,
                                 ------------------------------------------   ------------
                                  1994     1995     1996     1997     1998        1999
                                  ----     ----     ----     ----     ----        ----
<S>                              <C>      <C>      <C>      <C>      <C>      <C>
Production of oil (MBbls/d)....    77.7     78.0     84.9     69.1     45.9        50.2
Production of natural gas
  (MMcf/d).....................   256.6    295.8    319.5    345.4    332.0       327.3
Production of oil equivalent
  (MBOE/d).....................   120.5    127.3    138.2    126.7    101.2       104.8
Average sales price:
  Oil ($/Bbl)..................  $13.18   $15.00   $17.74   $16.80   $11.51      $10.84
  Natural gas ($/Mcf)..........  $ 1.71   $ 1.40   $ 2.07   $ 2.26   $ 1.95      $ 1.73
Production costs per BOE
  (including production,
  severance and ad valorem
  taxes).......................  $ 4.97   $ 4.84   $ 5.16   $ 4.88   $ 4.43      $ 4.25
</TABLE>

                                      S-12
<PAGE>   14

                                  RISK FACTORS

     Before investing in our common stock, you should carefully consider the
risks described below, in addition to other information contained or
incorporated by reference in this prospectus supplement and the accompanying
prospectus. In addition, please read "Forward-Looking Statements" on page 2 of
the accompanying prospectus, where we describe additional uncertainties
associated with our business and the forward-looking statements contained or
incorporated by reference in this prospectus supplement and the accompanying
prospectus.

     A DECREASE IN OIL AND NATURAL GAS PRICES WILL ADVERSELY AFFECT OUR
FINANCIAL RESULTS. Prices of oil and natural gas have historically been volatile
and have been at significantly lower prices during the last year than those we
are currently receiving. As a result of these lower prices over the past year,
both Santa Fe and Snyder have incurred substantial losses. Decreases in oil and
natural gas prices from current levels will adversely affect our revenues,
results of operations, cash flows and proved reserves.

     If the industry experiences significant prolonged future price decreases,
Santa Fe Snyder may be unable to generate sufficient cash flow from operations
to make planned capital expenditures and to meet its debt services obligations.

     WE MAY INCUR ADDITIONAL WRITEDOWNS OF PROPERTIES' CARRYING VALUES.
Accounting rules require that we review periodically the carrying value of our
oil and gas properties for possible impairment. Based on specific market factors
and circumstances at the time of prospective impairment reviews, and the
continuing evaluation of development plans, production data, economics and other
factors, we may be required to write down the carrying value of our oil and gas
properties. A writedown constitutes a charge to earnings, which does not impact
our cash flow from operating activities.

     Based primarily on our long-term outlook for future commodities prices, we
recorded an impairment charge of approximately $196 million, on a pre-tax basis,
during the second quarter of 1999, pursuant to the provisions of Statement of
Financial Accounting Standards No. 121.

     OUR OPERATIONS IN FOREIGN COUNTRIES EXPOSE US TO POLITICAL AND ECONOMIC
UNCERTAINTIES. We conduct a significant part of our operations in foreign
countries, including Indonesia, Argentina, Gabon, China and Brazil. Our
operations in foreign countries expose us to the following political, economic
and other risks:

     - the risk of war, revolution, civil unrest, border disputes,
       expropriation, forced renegotiation or modification of existing
       contracts, import, export and transportation regulations and tariffs;

     - taxation policies, including royalty and tax increases and retroactive
       tax claims;

     - exchange controls, currency fluctuations and other uncertainties arising
       out of foreign government sovereignty over our international operations;

     - laws and policies of the United States affecting foreign trade, taxation
       and investment; and

     - the possibility of having to be subject to the exclusive jurisdiction of
       foreign courts in connection with legal disputes and the possible
       inability to subject foreign persons to the jurisdiction of courts in the
       United States.

     Approximately 20% of our pro forma year-end 1998 reserves are located in
Indonesia. Recent currency devaluation and political instability has caused,
among other things, disruptions in the delivery of services and goods which has
led to delays in operations and associated production. Further political,
economic and social instability in Indonesia could have a material adverse
effect on our operations and future financial performance.

     ESTIMATES OF OUR PROVED RESERVES MAY CHANGE AND WE MAY NOT BE ABLE TO
REPLACE OUR RESERVES. The calculations of

                                      S-13
<PAGE>   15

proved reserves of crude oil and natural gas
included in this document are only estimates. The accuracy of any reserve
estimate is a function of the quality of available data and engineering and
geological interpretation and judgment and the assumptions used regarding
quantities of recoverable oil and natural gas reserves and prices for crude oil,
natural gas liquids and natural gas. Actual prices, production, development
expenditures, operating expenses and quantities of recoverable oil and natural
gas reserves will vary from those assumed in our estimates, and such variances
may be significant. Any significant variance from the assumptions used could
result in the actual quantity of our reserves and future net cash flow being
materially different from the estimates in our reserve reports. In addition,
results of drilling, testing and production and changes in crude oil, natural
gas liquids and natural gas prices after the date of the estimate may result in
substantial upward or downward revisions.

     Without successful exploration, development or acquisition activities, our
reserves and revenues will decline over time. Exploration, the continuing
development of our reserves and acquisition activities will require significant
expenditures. If our cash flow from operations is not sufficient for this
purpose, we may not be able to obtain the necessary funds from other sources.

     THE PENDING PROPERTY ACQUISITION FROM SDDI MIGHT NOT BE CONSUMMATED AS
EXPECTED. Under the purchase agreement with SDDI, there are customary conditions
to the obligations of the parties to complete the pending transaction. We expect
that these conditions will be satisfied and the transaction will be completed in
August 1999. However, we cannot be sure that the acquisition will be completed
as expected until it is actually consummated.

     WE ARE EXPOSED TO RISKS RELATED TO OUR HEDGING ACTIVITIES. Periodically, we
enter into hedging arrangements relating to a portion of our oil and natural gas
production to achieve a more predictable cash flow, as well as to reduce our
exposure to adverse price fluctuations of oil and natural gas. Hedging
instruments used are fixed price swaps, collars and options. While the use of
these types of hedging instruments limits the downside risk of adverse price
movements, they are subject to a number of risks, including instances in which:

     - the benefit to revenues is limited when commodity prices increase; and

     - counterparties to our futures contract will be unable to meet the
       financial terms of the transaction.

     WHEN WE ACQUIRE OIL AND GAS PROPERTIES, OUR FAILURE TO FULLY IDENTIFY
POTENTIAL PROBLEMS, TO PROPERLY ESTIMATE RESERVES OR PRODUCTION RATES OR COSTS,
OR TO EFFECTIVELY INTEGRATE THE ACQUIRED OPERATIONS COULD SERIOUSLY HARM US.
From time to time we acquire oil and gas properties. When we do so, our failure
to fully identify potential problems, to properly estimate reserves or
production rates or costs, or to effectively integrate the acquired operations
could seriously harm us. Although we perform reviews of acquired properties that
we believe are consistent with industry practices, we do not review in depth
every individual property involved in each acquisition. Ordinarily, we focus on
higher-value properties and sample the remainder. However, even a detailed
review of records and properties may not necessarily reveal existing or
potential problems, nor will it permit a buyer to become sufficiently familiar
with the properties to assess fully their deficiencies and potential.
Inspections may not always be performed on every well, and environmental
problems, such as ground water contamination, are not necessarily observable
even when an inspection is undertaken.

     Even when problems are identified, we often assume environmental and other
risks and liabilities in connection with acquired properties. There are numerous
uncertainties inherent in estimating quantities of proved oil and gas reserves
and actual future production rates and associated costs with respect to acquired
properties. Actual results may vary substantially from those assumed in the
estimates. In addition, acquisitions may have adverse effects on our operating
results, particularly during the periods in which the

                                      S-14
<PAGE>   16

operations of acquired businesses are being
integrated into our ongoing operations.

     OUR COMPUTER SYSTEMS AND THOSE OF THIRD PARTIES MAY NOT BE YEAR 2000
COMPLIANT, WHICH MAY CAUSE SYSTEM FAILURES AND DISRUPTIONS IN OPERATIONS. The
inability of some computer programs and embedded computer chips to distinguish
between the year 1900 and the year 2000 poses a serious threat of business
disruption to any organization that utilizes computer technology and computer
chip technology in their business systems or equipment. We have formed a Year
2000 task force with representation from major business units to inventory and
assess the risk associated with hardware, software, telecommunications systems,
office equipment, embedded chip controls and systems, process control systems,
facility control systems and dependencies on external trading partners.

     We presently believe that, with conversions to new software and completion
of efforts planned by the Year 2000 task force, the risk associated with year
2000 will be significantly reduced. However, we are unable to assure that the
consequences of year 2000 failures of systems maintained by us or by third
parties will not materially adversely impact our results of operations,
liquidity or financial condition.

                                USE OF PROCEEDS

     We expect the net proceeds from this offering of common stock to be
approximately $93.9 million, after deducting underwriting discounts and our
estimated expenses of the offering.

     We will add the net proceeds of this offering to working capital and use
them for general corporate purposes, including repayment of debt. In particular,
we expect to use the approximately $93.9 million net proceeds from this
offering, together with approximately $100 million prepayment proceeds from a
three-year forward sale of approximately 6 MMBbls of our future oil production,
to fund the purchase price and estimated development expenditures for the
balance of 1999 associated with the pending property acquisition from SDDI.
Pending the use of the net proceeds from this offering to pay a portion of the
pending property acquisition from SDDI, we will reduce borrowings under our
credit facility.

     The current interest rate for the amounts borrowed under the credit
facility is 6.25%.

     Our credit facility consists of the following two tranches:

     - $350 million five-year tranche maturing on May 5, 2004; and

     - $150 million 364-day tranche maturing on May 4, 2000, which converts into
       a one-year loan if this tranche is not renewed.

                                      S-15
<PAGE>   17

                                 CAPITALIZATION

     The following table sets forth:

     - our actual capitalization as of June 30, 1999; and

     - such capitalization as adjusted to give effect to the issuance of the
       common stock we are selling in this offering and the application of the
       net proceeds from this offering.

     See "Use of Proceeds."

     The as-adjusted capitalization assumes that the underwriters do not
exercise the option granted by Santa Fe Snyder to purchase additional shares in
connection with this offering.

<TABLE>
<CAPTION>
                                                                  JUNE 30, 1999
                                                              ----------------------
                                                               ACTUAL    AS ADJUSTED
                                                               ------    -----------
                                                                  (EXPRESSED IN
                                                                    MILLIONS)
<S>                                                           <C>        <C>
DEBT:
Credit facility borrowings(1)...............................  $  342.4    $  342.4
8.75% senior subordinated notes due 2007....................     175.0       175.0
8.05% senior notes due 2004.................................     123.5       123.5
                                                              --------    --------
          Total debt........................................     640.9       640.9(1)
STOCKHOLDERS' EQUITY:
Common stock................................................       2.0         2.0
Paid-in capital.............................................   1,139.0     1,232.9
Retained earnings...........................................    (533.0)     (533.0)
Other.......................................................     (10.0)      (10.0)
                                                              --------    --------
          Total stockholders' equity........................  $  598.0    $  691.9
                                                              --------    --------
TOTAL CAPITALIZATION........................................  $1,238.9    $1,332.8
                                                              ========    ========
</TABLE>

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

(1) At August 3, 1999, our borrowings under the credit facility were
    approximately $373 million.

                                      S-16
<PAGE>   18

                PRICE RANGE OF COMMON STOCK AND DIVIDEND POLICY

     Our common stock is traded on the New York Stock Exchange under the trading
symbol "SFS." The table below provides information regarding Sante Fe Snyder
common stock for 1999 (through August 3, 1999). Prices shown are from the New
York Stock Exchange Composite Transactions Reporting System.

<TABLE>
<CAPTION>
                                                               PRICE RANGE
                                                              -------------
                                                              HIGH      LOW
                                                              ----      ---
<S>                                                           <C>       <C>
1999
- ------------------------------------------------------------
First Quarter...............................................   $7 5/8   $4 7/8
Second Quarter..............................................    9 5/16   6 9/16
Third Quarter (through August 3, 1999)......................    9 1/4    8 1/8
</TABLE>

     The last reported sales price of our common stock on the New York Stock
Exchange for August 3, 1999 was $9 1/8 per share. At June 30, 1999, there were
170,996,985 shares of Santa Fe Snyder common stock outstanding, held by
approximately 29,000 stockholders of record and 41,600 beneficial owners.

     We have not paid cash dividends on Santa Fe Snyder common stock at any time
during the periods reflected in the above table. Future dividend payments will
depend upon our level of earnings, financial requirements and other relevant
factors.

                                    EXPERTS

     The financial statements incorporated in this prospectus supplement by
reference to the Annual Report on Form 10-K/A of Santa Fe Energy Resources, Inc.
for the year ended December 31, 1998, have been so incorporated in reliance on
the report of PricewaterhouseCoopers LLP, independent accountants, given on the
authority of said firm as experts in auditing and accounting.

     The financial statements incorporated in this prospectus supplement by
reference to Snyder Oil Corporation's Annual Report on Form 10-K/A for the year
ended December 31, 1998, have been so incorporated in reliance on the report of
Arthur Andersen LLP, independent accountants, given on the authority of said
firm as experts in auditing and accounting.

                             VALIDITY OF SECURITIES

     The validity of the shares of common stock we are offering will be passed
upon for us by Andrews & Kurth L.L.P., Houston, Texas. Certain legal matters
with respect to the shares will be passed upon for the underwriters by Vinson &
Elkins L.L.P., Houston, Texas. Vinson & Elkins L.L.P. provides legal services to
Santa Fe Snyder unrelated to this offering.

                                      S-17
<PAGE>   19

                                  UNDERWRITING

     Santa Fe Snyder and the underwriters for the offering named below have
entered into an underwriting agreement with respect to the shares being offered.
Subject to certain conditions, each underwriter has severally agreed to purchase
the number of shares indicated in the following table.

<TABLE>
<CAPTION>
                                                                 Number of
                        Underwriters                               Shares
                        ------------                             ---------
<S>                                                           <C>
Goldman, Sachs & Co. .......................................      4,950,000
Credit Suisse First Boston Corporation......................      4,950,000
Johnson Rice & Company L.L.C. ..............................      1,100,000
                                                                 ----------
          Total.............................................     11,000,000
                                                                 ==========
</TABLE>

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

     If the underwriters sell more shares than the total number set forth in the
table above, the underwriters have an option to buy up to an additional
1,650,000 shares from Santa Fe Snyder to cover such sales. They may exercise
that option for 30 days. If any shares are purchased pursuant to this option,
the underwriters will severally purchase shares in approximately the same
proportion as set forth in the table above.

     The following table shows the per share and total underwriting discounts
and commissions to be paid to the underwriters by Santa Fe Snyder. Such amounts
are shown assuming both no exercise and full exercise of the underwriters'
option to purchase additional shares.

<TABLE>
<CAPTION>
              Paid by Santa Fe Snyder
              -----------------------
                        No Exercise   Full Exercise
                        -----------   -------------
<S>                     <C>           <C>
Per Share............   $   0.5000     $   0.5000
Total................   $5,500,000     $6,325,000
</TABLE>

     Shares sold by the underwriters to the public will initially be offered at
the initial price to public set forth on the cover of this prospectus
supplement. Any shares sold by the underwriters to securities dealers may be
sold at a discount of up to $0.30 per share from the initial price to public.
Any such securities dealers may resell any shares purchased from the
underwriters to certain other brokers or dealers at a discount of up to $0.10
per share from the initial price to public. If all the shares are not sold at
the initial price to public, the underwriters may change the offering price and
the other selling terms.

     Santa Fe Snyder and the directors and executive officers of Santa Fe Snyder
have agreed with the underwriters not to dispose of or hedge any of the common
stock, preferred stock, depositary shares or securities convertible into or
exchangeable for shares of the common stock during the period from the date of
this prospectus supplement continuing through the date 90 days after the date of
this prospectus supplement, except with the prior written consent of Goldman,
Sachs & Co. This agreement does not apply to any existing employee benefit
plans.

     In connection with the offering, the underwriters may purchase and sell
shares of common stock in the open market. These transactions may include short
sales, stabilizing transactions and purchases to cover positions created by
short sales. Short sales involve the sale by the underwriters of a greater
number of shares than they are required to purchase in the offering. Stabilizing
transactions consist of certain bids or purchases made for the purpose of
preventing or retarding a decline in the market price of the common stock while
the offering is in progress.

     The underwriters also may impose a penalty bid. This occurs when a
particular underwriter repays to the underwriters a portion of the underwriting
discount received by it because the representatives have repurchased shares sold
by or for the account of such underwriter in stabilizing or short covering
transactions.

                                      S-18
<PAGE>   20

     These activities by the underwriters may stabilize, maintain or otherwise
affect the market price of the common stock. As a result, the price of the
common stock may be higher than the price that otherwise might exist in the open
market. If these activities are commenced, they may be discontinued by the
underwriters at any time. These transactions may be effected on the NYSE, in the
over-the-counter market or otherwise.

     Santa Fe Snyder estimates that its share of the total expenses of the
offering, excluding underwriting discounts and commissions, will be
approximately $300,000.

     Santa Fe Snyder has agreed to indemnify the several underwriters against
certain liabilities, including liabilities under the Securities Act of 1933.

     The underwriters have performed certain investment banking and advisory
services for Santa Fe Snyder from time to time for which they have received
customary fees and expenses. The underwriters may, from time to time in the
future, engage in transactions with and perform services for Santa Fe Snyder in
the ordinary course of their business. Goldman, Sachs & Co. in the past has
performed investment banking and other financial services for Santa Fe Snyder
and has received compensation for these services. Goldman, Sachs & Co. and
Credit Suisse First Boston Corporation also acted as underwriters in our recent
offering of $125 million 8.05% senior notes due 2004, for which they received
customary compensation.

                                      S-19
<PAGE>   21

                  GLOSSARY OF COMMONLY USED OIL AND GAS TERMS

     The following are abbreviations and definitions of terms commonly used in
the oil and gas industry and this document. Unless otherwise indicated in this
document, natural gas volumes are stated at the legal pressure base of the state
or area in which the reserves are located and at 60 degrees Fahrenheit.

     "Bbl" means a barrel of 42 U.S. gallons of oil.

     "Bcf" means billion cubic feet of natural gas.

     "BOE" means barrels of oil equivalent. BOEs are determined using the ratio
of six Mcf of natural gas to one Bbl of oil.

     "BOEPD" means barrels of oil equivalent per day.

     "Btu" or "British Thermal Unit" means the quantity of heat required to
raise the temperature of one pound of water by one degree Fahrenheit.

     "MBbls" means thousand barrels of oil.

     "MBbls/d" means MBbls per day.

     "MBOE" means thousand barrels of oil equivalent.

     "MBOE/d" means MBOE per day.

     "Mcf" means thousand cubic feet of natural gas.

     "Mcfe" means thousand cubic feet equivalent, which is determined using the
ratio of one barrel of oil, condensate or natural gas liquids to six Mcf of
natural gas.

     "MMBbls" means million barrels of oil.

     "MMBOE" means million barrels of oil equivalent.

     "MMBtu" means million British Thermal Units.

     "MMcf" means million cubic feet of natural gas.

     "MMcf/d" means MMcf per day.

     "Present Value of Future Net Revenues" or "Present Value of Proved
Reserves" means the present value of estimated future revenues to be generated
from the production of proved reserves calculated in accordance with Securities
and Exchange Commission guidelines, net of estimated production and future
development costs, using prices and costs as of the date of estimation without
future escalation, without giving effect to non-property related expenses such
as general and administrative expenses, debt service, future income tax expense
and depreciation, depletion and amortization, and discounted using an annual
discount rate of 10%.

     "Standardized Measure of Discounted Future Net Cash Flows" means the
Present Value of Future Net Revenues after income taxes discounted at 10%.

                                       A-1
<PAGE>   22

PROSPECTUS

                                  $500,000,000

                          SANTA FE SNYDER CORPORATION
                                DEBT SECURITIES
                          SUBORDINATED DEBT SECURITIES
                                PREFERRED STOCK
                                  COMMON STOCK

                              SFS CAPITAL TRUST I
                              SFS CAPITAL TRUST II
                           TRUST PREFERRED SECURITIES
                   GUARANTEED BY SANTA FE SNYDER CORPORATION

     Santa Fe Snyder Corporation may offer and sell in one or more offerings:

     - unsecured debt securities consisting of senior notes and debentures and
       subordinated notes and debentures and/or other unsecured evidences of
       indebtedness in one or more series;

     - shares of preferred stock, in one or more series, which may be
       convertible or exchangeable for common stock or debt securities; and

     - shares of common stock.

     SFS Capital Trust I and SFS Capital Trust II, each a wholly owned
subsidiary of Santa Fe Snyder Corporation, may offer and sell in one or more
offerings:

     - trust preferred securities representing undivided beneficial interests in
       the assets of each trust. As described in this document, Santa Fe Snyder
       will provide a limited guarantee of the payment by each trust of
       distributions on the trust preferred securities and the payment upon
       liquidation and redemption.

     The aggregate initial offering price of the securities that we offer will
not exceed $500,000,000. We will offer the securities in amounts, at prices and
on terms to be determined by market conditions at the time of our offerings.

     We will provide the specific terms of the securities in supplements to this
prospectus. You should read this prospectus and the prospectus supplements
carefully before you invest in any of our securities. This prospectus may not be
used to consummate sales of our securities unless it is accompanied by a
prospectus supplement.

     Santa Fe Snyder's common stock is listed for trading on the New York Stock
Exchange under the symbol "SFS".

     NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES
COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR DETERMINED WHETHER
THIS PROSPECTUS IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.

                                 July 19, 1999.
<PAGE>   23

     You should rely only on the information incorporated by reference or
provided in this prospectus or any prospectus supplement. We have not authorized
anyone else to provide you with different information. We are not making an
offer of these securities in any state where the offer is not permitted. You
should not assume that the information incorporated by reference or provided in
this prospectus or any prospectus supplement is accurate as of any date other
than the date on the front of each of those documents.

                               TABLE OF CONTENTS

<TABLE>
<S>                                                           <C>
About This Prospectus.......................................    1
Where You Can Find More Information.........................    1
Forward-Looking Statements..................................    2
Santa Fe Snyder Corporation.................................    2
The Trusts..................................................    2
Use of Proceeds.............................................    3
Ratio of Earnings to Fixed Charges..........................    4
Plan of Distribution........................................    4
Description of Debt Securities..............................    5
Description of Equity Securities............................   16
Description of Trust Preferred Securities...................   20
Description of Trust Preferred Securities Guarantees........   21
Relationship Among the Trust Preferred Securities, the
  Subordinated Debt Securities and the Guarantees...........   24
Legal Opinions..............................................   25
Experts.....................................................   25
</TABLE>

                                        i
<PAGE>   24

                             ABOUT THIS PROSPECTUS

     This prospectus is part of a registration statement that we have filed with
the Securities and Exchange Commission utilizing a "shelf" registration process.
Under this shelf process, we may, over the next two years, sell different types
of securities described in this prospectus in one or more offerings up to a
total offering amount of $500 million. This prospectus provides you with a
general description of the securities we may offer. Each time we sell
securities, we will provide a prospectus supplement that will contain specific
information about the terms of that offering and the securities offered by us in
that offering. The prospectus supplement may also add, update or change
information in this prospectus. You should read both this prospectus and any
prospectus supplement together with additional information described under the
heading "Where You Can Find More Information."

     In this prospectus references to "Santa Fe Snyder," "we," "us" and "our"
mean Santa Fe Snyder Corporation.

                      WHERE YOU CAN FIND MORE INFORMATION

     We file annual, quarterly and special reports and other information with
the SEC. Our SEC filings are available to the public over the Internet or at the
SEC's web site at http://www.sec.gov. You may also read and copy any document we
file at the SEC's public reference rooms in Washington, D.C., New York, New York
and Chicago, Illinois. Please call the SEC at 1-800-SEC-0330 for further
information on the operation of the public reference rooms.

     The SEC allows us to "incorporate by reference" the information we file
with them, which means that we can disclose important information to you by
referring you to those documents. The information incorporated by reference is
considered to be part of this prospectus, and information that we file later
with the SEC will automatically update and supersede this information. We
incorporate by reference the documents listed below and any future filings made
with the SEC under Sections 13(a), 13(c), 14, or 15(d) of the Securities
Exchange Act of 1934 until we sell all of the securities:

     - Snyder Oil Corporation's Annual Report on Form 10-K/A for the fiscal year
       ended December 31, 1998 as amended by Amendment No. 2 filed on April 30,
       1999;

     - Santa Fe Energy Resources, Inc.'s Annual Report on Form 10-K/A for the
       fiscal year ended December 31, 1998;

     - Santa Fe Synder Corporation's Quarterly Report on Form 10-Q for the
       quarter ended March 31, 1999;

     - Santa Fe Snyder Corporation's Current Report on Form 8-K filed on May 6,
       1999 announcing the consummation of the merger of Snyder Oil Corporation
       with and into Santa Fe Energy Resources, Inc.;

     - Santa Fe Snyder Corporation's Current Report on Form 8-K/A filed on May
       25, 1999 containing pro forma financial information giving effect to the
       merger;

     - Santa Fe Snyder Corporation's Current Report on Form 8-K filed on June
       15, 1999 announcing the commencement of an offering of $125 million
       aggregate principal amount of 8.05% Senior Notes due 2004;

     - Santa Fe Snyder Corporation's Current Report on Form 8-K filed on July 8,
       1999 containing interim financial information as of March 31, 1999
       regarding Snyder Oil Corporation; and

     - the descriptions of our common stock and preferred stock contained in our
       registration statements on Form S-2 (File No. 33-32831) filed on February
       21, 1990 and on Form 8-A filed February 28, 1997, as amended by Form
       8-A/A filed on May 11, 1999.

     You may request a copy of these filings, at no cost, by writing or calling
us at the following address:

           Rodney Waller
           Investor Relations
           Santa Fe Snyder Corporation
           840 Gessner, Suite 1400
           Houston, Texas 77024
           (713) 507-5388

                                        1
<PAGE>   25

                           FORWARD-LOOKING STATEMENTS

     Some of the information included in this prospectus, any prospectus
supplement and the documents we have incorporated by reference contain
forward-looking statements. Such statements use forward-looking words such as
"anticipate," "believe," "expect," "may," "project," "will" or other similar
words and discuss "forward-looking" information including the following:

     - estimated production levels;

     - anticipated capital expenditures;

     - future cash flows and borrowings;

     - pursuit of potential future acquisition opportunities; and

     - sources of funding for exploration.

     These forward-looking statements are based on assumptions that we believe
are reasonable, but they are open to a wide range of uncertainties and business
risks. Factors that could cause actual results to differ materially from those
anticipated are discussed in our periodic filings with the SEC, including Santa
Fe Energy Resources, Inc.'s Annual Report on Form 10-K/A for the year ended
December 31, 1998, Snyder Oil Corporation's Annual Report on Form 10-K/A for the
year ended December 31, 1998, and Santa Fe Snyder Corporation's Quarterly Report
on Form 10-Q for the quarter ended March 31, 1999.

     When considering these forward-looking statements, you should keep in mind
the risk factors and other cautionary statements in this document, any
prospectus supplement and the documents we have incorporated by reference. We
will not update these forward-looking statements unless the securities laws
require us to do so.

                          SANTA FE SNYDER CORPORATION

     Santa Fe Snyder Corporation was created on May 5, 1999 through the
combination by merger of Snyder Oil Corporation with and into Santa Fe Energy
Resources, Inc. Santa Fe Snyder is a large independent oil and natural gas
exploration and production company with operations in the United States,
Southeast Asia, South America and West Africa. On a pro forma combined basis, as
of January 1, 1999, we had estimated proved reserves of 315 million barrels of
oil equivalent, with 65% domestic reserves and 35% international reserves. 60%
of our estimated proved reserves are oil and 40% are natural gas. Our combined
production for 1999 is estimated to be 105,000 barrels of oil equivalent per
day, with 55% of the combined production natural gas and 70% domestic.

     Our principal executive offices are located at 840 Gessner, Suite 1400,
Houston, Texas 77024, and our telephone number is (713) 507-5000.

                                   THE TRUSTS

     Each of SFS Capital Trust I and SFS Capital Trust II is a statutory
business trust created under Delaware law through the filing of a certificate of
trust with the Delaware Secretary of State. Each trust's business is defined in
a declaration of trust which was executed by Santa Fe Snyder, as sponsor for
each of the trusts, and the trustees, as defined below, for each of the trusts.
Each declaration will be amended and restated before any sale by that trust of
trust preferred securities. Each declaration will also be qualified as an
indenture under the Trust Indenture Act of 1939, as amended. Each trust exists
for the exclusive purposes of:

     - issuing and selling the trust preferred securities and the trust common
       securities;

     - investing the gross proceeds from the sale of the trust preferred
       securities in subordinated debt securities issued by Santa Fe Snyder; and

                                        2
<PAGE>   26

     - engaging in only those other activities necessary or incidental to these
       purposes.

     Santa Fe Snyder will, directly or indirectly, acquire trust common
securities in an aggregate liquidation amount equal to 3% of the total capital
of each of the trusts.

     Each trust's business and affairs will be conducted by its trustees. A
majority of the trustees of each trust will be administrative trustees and will
be persons who are employees or officers of or affiliated with Santa Fe Snyder.
One trustee of each trust will be a financial institution that will be
unaffiliated with Santa Fe Snyder and that will act as property trustee and as
indenture trustee for purposes of the Trust Indenture Act, as described in the
applicable prospectus supplement. In addition, unless the property trustees
maintain a principal place of business in the State of Delaware, and otherwise
meet the requirements of applicable law, one trustee of each trust, the Delaware
trustee, will have its principal place of business or reside in the State of
Delaware. The administrative trustees and the property trustees, together with
the Delaware trustee, are referred to in this document as the trustees. Each
trust's business and affairs will be conducted by the trustees appointed by
Santa Fe Snyder, as the direct or indirect holder of all the trust common
securities. Except in limited circumstances, Santa Fe Snyder as the holder of
the trust common securities will be entitled to appoint, remove or replace any
of, or increase or reduce the number of, the trustees of a trust. The
declaration of each trust will govern the duties and obligations of the
trustees. Santa Fe Snyder will pay all fees and expenses related to the trusts
and the offering of trust securities, the payment of which will be guaranteed by
Santa Fe Snyder.

     The office of the Delaware trustee for each trust in the State of Delaware
is White Clay Center, Route 273, Newark, Delaware 19711. The principal place of
business of each trust is c/o Santa Fe Snyder Corporation, 840 Gessner, Suite
1400, Houston, Texas 77024, and its telephone number is (713) 507-5000.

                                USE OF PROCEEDS

     We intend to use the net proceeds we receive from the sale of the
securities offered by this prospectus and the accompanying prospectus supplement
for the repayment of debt and for general corporate purposes, unless we specify
otherwise in the applicable prospectus supplement. General corporate purposes
may include the repayment of existing indebtedness, additions to working
capital, capital expenditures or the financing of possible acquisitions,
including acquisitions of onshore and offshore oil and natural gas properties.

                                        3
<PAGE>   27

                       RATIO OF EARNINGS TO FIXED CHARGES

     The following table sets forth our ratio of earnings to fixed charges and
earnings to combined fixed charges and preferred stock dividends of Santa Fe
Energy Resources, Inc., the predecessor of Santa Fe Snyder Corporation, for the
periods indicated. Santa Fe Snyder was created by merger of Snyder Oil
Corporation with and into Santa Fe Energy Resources on May 5, 1999. The
applicable ratios for the combined entity will be set forth in the applicable
prospectus supplement.

<TABLE>
<CAPTION>
                                                         SANTA FE ENERGY RESOURCES
                                              ------------------------------------------------
                                              THREE MONTHS
                                                  ENDED
                                                MARCH 31,         YEARS ENDED DECEMBER 31,
                                              -------------   --------------------------------
                                              1999    1998    1998   1997   1996   1995   1994
                                              -----   -----   ----   ----   ----   ----   ----
<S>                                           <C>     <C>     <C>    <C>    <C>    <C>    <C>
Earnings to Fixed Charges...................   (a)     (a)    (a)    4.7    2.3    2.1    1.8
Earnings to Combined Fixed Charges and
  Preferred Stock Dividends.................   (b)     (b)    (b)    2.6    (b)    1.3    1.2
</TABLE>

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

(a) Earnings during the three months ended March 31, 1999 and 1998 and the year
    1998 were insufficient to cover fixed charges (excluding dividends on
    preferred stock) by $18 million, $6.3 million and $167.3 million,
    respectively.

(b) Earnings during the three months ended March 31, 1999 and 1998 and the years
    1998 and 1996 were insufficient to cover combined fixed charges and
    preferred stock dividends by $18 million, $6.3 million, $167.3 million and
    $12.7 million, respectively. In the second quarter of 1997, Santa Fe
    converted the remaining 1.2 million outstanding shares of Convertible
    Preferred Stock, Series 7%, into 2.3 million shares of common stock. Also in
    the second quarter of 1997, Santa Fe converted all 10.7 million of its $.732
    Series A Convertible Preferred Stock into 9.1 million shares of common
    stock.

     For the purpose of computing the ratio of earnings to fixed charges,
earnings means:

     - income from continuing operations before income taxes;

     - plus fixed charges;

     - plus amortization of capitalized interest; and

     - less capitalized interest.

     Fixed charges means the sum of the following:

     - interest, including capitalized interest, on all indebtedness; and

     - amortization of debt discount.

                              PLAN OF DISTRIBUTION

     We may sell our securities through agents, underwriters or dealers,
directly to purchasers.

     We may designate agents to solicit offers to purchase our securities.

     - We will name any agent involved in offering or selling our securities,
       and any commissions that we will pay to the agent, in our prospectus
       supplement.

     - Unless we indicate otherwise in our prospectus supplement, our agents
       will act on a best efforts basis for the period of their appointment.

     - Our agents may be deemed to be underwriters under the Securities Act of
       1933 of any of our securities that they offer or sell.

                                        4
<PAGE>   28

     We may use an underwriter or underwriters in the offer or sale of our
securities.

     - If we use an underwriter or underwriters, we will execute an underwriting
       agreement with the underwriter or underwriters at the time that we reach
       an agreement for the sale of our securities.

     - We will include the names of the specific managing underwriter or
       underwriters, as well as any other underwriters, and the terms of the
       transactions, including the compensation the underwriters and dealers
       will receive, in our prospectus supplement.

     - The underwriters will use our prospectus supplement to sell our
       securities.

     We may use a dealer to sell our securities.

     - If we use a dealer, we, as principal, will sell our securities to the
       dealer.

     - The dealer will then sell our securities to the public at varying prices
       that the dealer will determine at the time it sells our securities.

     - We will include the name of the dealer and the terms of our transactions
       with the dealer in our prospectus supplement.

     We may directly solicit offers to purchase our securities, and we may
directly sell our securities to institutional or other investors. We will
describe the terms of our direct sales in our prospectus supplement.

     We may indemnify agents, underwriters, and dealers against certain
liabilities, including liabilities under the Securities Act of 1933. Our agents,
underwriters, and dealers, or their affiliates, may be customers of, engage in
transactions with or perform services for us, in the ordinary course of
business.

     We may authorize our agents and underwriters to solicit offers by certain
institutions to purchase our securities at the public offering price under
delayed delivery contracts.

     - If we use delayed delivery contracts, we will disclose that we are using
       them in the prospectus supplement and will tell you when we will demand
       payment and delivery of the securities under the delayed delivery
       contracts.

     - These delayed delivery contracts will be subject only to the conditions
       that we set forth in the prospectus supplement.

     - We will indicate in our prospectus supplement the commission that
       underwriters and agents soliciting purchases of our securities under
       delayed delivery contracts will be entitled to receive.

                         DESCRIPTION OF DEBT SECURITIES

     Any debt securities we offer will be our direct, unsecured general
obligations. The debt securities will be either senior debt securities or
subordinated debt securities. The debt securities will be issued under one or
more separate indentures between us and The Bank of New York, as trustee. Senior
debt securities will be issued under a "senior indenture" and subordinated debt
securities will be issued under a "subordinated indenture." Together the senior
indenture and the subordinated indenture are called "indentures."

     We have summarized selected provisions of the indentures below. The
following description is a summary of the material provisions of the indentures.
It does not restate those agreements in their entirety. We urge you to read each
of the indentures because each one, and not this description, defines your
rights as holders of the debt securities. The forms of each of the indentures
have been filed as exhibits to the registration statement.

GENERAL

     The debt securities will be our direct, unsecured obligations. The senior
debt securities will rank equally with all of our other senior and
unsubordinated debt. The subordinated debt securities will have a junior
position to all of our senior debt securities.

                                        5
<PAGE>   29

     If SFS Capital Trust I or SFS Capital Trust II issue trust preferred
securities, Santa Fe Snyder will also issue subordinated debt securities to SFS
Capital Trust I or SFS Capital Trust II or a trustee of either trust. If the
trusts are subsequently dissolved upon the occurrence of the events described in
the prospectus supplement relating to the trust preferred securities, the trusts
or trustees may distribute these subordinated debt securities ratably to the
holders of trust preferred securities.

     A prospectus supplement and a supplemental indenture, board resolution or
officers certificate relating to any series of debt securities being offered
will include specific terms relating to the offering. These terms will include
some or all of the following:

     - the title and type of the debt securities;

     - the total principal amount of the debt securities;

     - the percentage of the principal amount at which the debt securities will
       be issued and any payments due if the maturity of the debt securities is
       accelerated;

     - the dates on which the principal of the debt securities will be payable;

     - the interest rate which the debt securities will bear and the interest
       payment dates for the debt securities;

     - the form of the subordinated debt securities Santa Fe Snyder will issue
       to the trusts or a trustee if the trusts issue trust preferred
       securities;

     - in the case of subordinated debt securities issued to the trusts or
       trustees, the right to extend payment periods and the duration of that
       extension;

     - any optional redemption periods;

     - any sinking fund or other provisions that would obligate us to repurchase
       or otherwise redeem some or all of the debt securities;

     - any changes to or additional events of defaults or covenants;

     - any special tax implications of the debt securities, including provisions
       for original issue discount securities, if offered;

     - restrictions on the declaration of dividends or requiring the maintenance
       of any asset ratio or the creation or maintenance of reserves; and

     - any other terms of the debt securities.

     None of the indentures limits the amount of debt securities that may be
issued. Each indenture allows debt securities to be issued up to the principal
amount that may be authorized by us and may be in any currency or currency unit
designated by us.

     Debt securities of a series may be issued in registered, bearer, coupon or
global form.

DENOMINATIONS

     The prospectus supplement for each issuance of debt securities will state
whether the securities will be issued in registered form of $1,000 each or
multiples thereof or bearer form of $5,000 each.

SUBORDINATION

     Under the subordinated indenture, payment of the principal, interest and
any premium on the subordinated debt securities will generally be subordinated
and junior in right of payment to the prior

                                        6
<PAGE>   30

payment in full of all senior debt securities. The subordinated indenture
provides that no payment of principal, interest and any premium on the
subordinated debt securities may be made in the event:

     - of any insolvency, bankruptcy or similar proceeding involving us or our
       property, or

     - we fail to pay the principal, interest, any premium or any other amounts
       on any senior debt when due.

     The subordinated indenture will not limit the amount of senior debt that we
may incur.

     Senior debt includes all notes or other unsecured evidences of
indebtedness, including guarantees given by us, for money borrowed by us, not
expressly subordinate or junior in right of payment to any of our other
indebtedness.

MODIFICATION OF INDENTURES

     Under each indenture our rights and obligations and the rights of the
holders may be modified with the consent of the holders of a majority in
aggregate principal amount of the outstanding debt securities of each series
affected by the modification. No modification of the principal or interest
payment terms, and no modification reducing the percentage required for
modifications, is effective against any holder without its consent.

EVENTS OF DEFAULT

     "Event of default" when used in an indenture, will mean any of the
following:

     - failure to pay the principal of or any premium on any debt security when
       due;

     - failure to deposit any sinking fund payment when due;

     - failure to pay interest on any debt security for 60 days;

     - failure to perform any other covenant in the indenture that continues for
       90 days after being given written notice;

     - certain events in bankruptcy, insolvency or reorganization of Santa Fe
       Snyder; or

     - any other event of default included in any indenture or supplemental
       indenture.

     An event of default for a particular series of debt securities does not
necessarily constitute an event of default for any other series of debt
securities issued under an indenture. The trustee may withhold notice to the
holders of debt securities of any default, except in the payment of principal or
interest, if it considers such withholding of notice to be in the best interests
of the holders.

     If an event of default for any series of debt securities occurs and
continues, the trustee or the holders of at least 25% in aggregate principal
amount of the debt securities of the series may declare the entire principal of
all the debt securities of that series to be due and payable immediately. If
this happens, subject to certain conditions, the holders of a majority of the
aggregate principal amount of the debt securities of that series can void the
declaration.

     Other than its duties in case of a default, a trustee is not obligated to
exercise any of its rights or powers under any indenture at the request, order
or direction of any holders, unless the holders offer the trustee reasonable
indemnity. If they provide this reasonable indemnification, the holders of a
majority in principal amount of any series of debt securities may direct the
time, method and place of conducting any proceeding or any remedy available to
the trustee, or exercising any power conferred upon the trustee, for any series
of debt securities.

                                        7
<PAGE>   31

COVENANTS

     Under the indentures, we will:

     - pay the principal of, and interest and any premium on, the debt
       securities when due;

     - maintain a place of payment;

     - deliver a report to the trustee at the end of each fiscal year reviewing
       our obligations under the indentures; and

     - deposit sufficient funds with any paying agent on or before the due date
       for any principal, interest or premium.

     If the trusts issue trust preferred securities and Santa Fe Snyder issues
subordinated debt securities to the trust or a trust in connection with the
issuance of the trust preferred securities and (1) an event of default as
defined herein has occurred, (2) Santa Fe Snyder is in default with respect to
its payment of any obligations under the related trust guarantee or the
guarantee of the trust common securities or (3) Santa Fe Snyder has given notice
of its election to defer payments of interest on these subordinated debt
securities by extending the interest payment period as provided in the indenture
governing these subordinated debt securities, and this interest payment period,
or any extension of this interest payment period, is continuing, Santa Fe Snyder
will be subject to restrictions regarding

     - the declaration of payment of dividends on, and the making of guarantee
       payments with respect to, any of its capital stock; and

     - the making of any payment of interest, principal or premium, if any, on
       or the repayment, repurchase or redemption of debt securities including
       guarantees issued by Santa Fe Snyder which rank equally with or junior to
       these subordinated debt securities.

     These restrictions will be described in more detail in the prospectus
supplement relating to these subordinated debt securities.

     If the trusts issue trust preferred securities and Santa Fe Snyder issues
subordinated debt securities to the trust or a trustee in connection with the
issuance of the trust preferred securities, for so long as the trust preferred
securities remain outstanding, Santa Fe Snyder will covenant in the declaration
of the trusts, the related guarantees or the indenture governing these
subordinated debt securities:

     - To directly or indirectly maintain 100% ownership of the common
       securities of each trust; provided, however, that any permitted successor
       under the indenture governing the subordinated debt securities may
       succeed to Santa Fe Snyder's ownership of the trust common securities;
       and

     - Not to voluntarily terminate, wind-up or liquidate either SFS Capital
       Trust I or SFS Capital Trust II, except in connection with

      -- the distribution of subordinated debt securities to the holders of
         trust preferred securities in liquidation of either trust;

      -- the redemption of all trust preferred securities of either trust; or

      -- mergers, consolidations or amalgamations permitted by the declaration
         of either trust.

     Santa Fe Snyder will also covenant to use its commercially reasonable
efforts, consistent with the terms and provisions of the declaration of either
trust, to cause each trust to remain classified as a grantor trust and not
taxable as a corporation for U.S. federal income tax purposes.

CERTAIN COVENANTS OF THE SENIOR INDENTURE

     The senior indenture will not limit the amount of indebtedness or other
obligations that we may incur and will not contain provisions that would give
you as a holder of senior debt securities the right to require us to repurchase
your senior debt securities in the event of a decline in the credit rating of
our debt

                                        8
<PAGE>   32

securities or upon a change of control. The senior indenture will contain
covenants including, among others, the following:

          Limitation on Liens. We will not, and will not permit any of our
     Subsidiaries (as defined below) to, issue, create assume or guarantee any
     indebtedness for borrowed money secured by a lien upon any of our Principal
     Property (as defined below) or the Principal Property of any Subsidiary or
     upon any shares of stock or indebtedness of any Subsidiary that owns or
     leases any Principal Property (whether the Principal Property, shares of
     stock or indebtedness is now existing or owned or subsequently created or
     acquired) without effectively providing that the senior debt securities
     will be secured equally and ratably with such secured debt until such time
     as such debt is no longer secured by a lien.

          The foregoing restriction will not require us to secure the senior
     debt securities if the liens consist of either Permitted Liens (as defined
     below) or if the indebtedness secured by these liens is Exempted
     Indebtedness (as described below).

          Limitation on Sale and Leaseback Transactions. We will not, and will
     not permit any of our Subsidiaries to, enter into any Sale and Leaseback
     Transaction (as defined below) with respect to any Principal Property
     unless:

        - we or our Subsidiary, as the case may be, would be entitled, pursuant
          to the provisions of the senior indenture, to incur indebtedness
          secured by a lien on the Principal Property involved in such
          transaction at least equal in amount to the Attributable Indebtedness
          (as defined below) with respect to that Sale and Leaseback Transaction
          without equally and ratably securing the senior debt securities
          pursuant to the covenant described above in "-- Limitation on Liens";

        - within twelve months after the effective date of such transaction, we
          apply an amount equal to the Attributable Indebtedness with respect to
          such Sale and Leaseback Transaction either (1) to the voluntary
          defeasance or retirement of the senior debt securities or other debt
          for borrowed money of ours or any of our Subsidiaries that matures
          more than one year after the creation of such debt or (2) to the
          acquisition, construction, development or improvement of any property
          used or to be used in our business.

          Exempted Indebtedness. Notwithstanding the foregoing limitations on
     liens and Sale and Leaseback Transactions, we and our Subsidiaries may
     issue, incur, create, assume, or guarantee indebtedness secured by a lien
     (other than a Permitted Lien) without securing the senior debt securities,
     or may enter into Sale and Leaseback Transactions without complying with
     the preceding paragraph, or enter into a combination of such transactions,
     if the sum of the aggregate principal amount of all such indebtedness and
     the Attributable Indebtedness of all such Sale and Leaseback Transactions
     then in existence, in each case not otherwise permitted in the preceding
     three paragraphs, does not at the time incurred exceed 10% of our
     Consolidated Net Tangible Assets.

     CERTAIN DEFINITIONS. As used in the foregoing description of certain
covenants by which we are bound pursuant to the senior indenture, the following
terms have the following meanings:

     Attributable Indebtedness means with respect to a Sale and Leaseback
Transaction involving a Principal Property, at the time of determination, the
lesser of:

     - the fair market value of such Principal Property (as determined in good
       faith by our Board of Directors);

     - the present value of the total net amount of rent required to be paid
       under such lease involved in such Sale and Leaseback Transaction during
       the remaining term thereof (including any renewal term exercisable at the
       lessee's option or period for which such lease has been extended),
       discounted at the rate of interest set forth or implicit in the terms of
       such lease or, if not practicable to determine such rate, the weighted
       average interest rate per annum borne by the notes of each series
       outstanding pursuant to the senior indenture compounded semi-annually; or

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<PAGE>   33

     - if the obligation with respect to the Sale and Leaseback Transaction
       constitutes an obligation that is required to be classified and accounted
       for as a capitalized lease for financial reporting purposes in accordance
       with generally accepted accounting principles, the amount equal to the
       capitalized amount of such obligation determined in accordance with
       generally accepted accounting principles and included in the financial
       statements of the lessee.

For purposes of the foregoing definition, rent shall not include amounts
required to be paid by the lessee, whether or not designated as rent or
additional rent, on account of or contingent upon maintenance and repairs,
insurance, taxes, assessments, water rates and similar charges. In the case of
any lease that is terminable by the lessee upon the payment of a penalty, such
net amount shall be the lesser of the net amount determined assuming termination
upon the first date such lease may be terminated (in which case the net amount
shall also include the amount of the penalty, but no rent shall be considered as
required to be paid under such lease subsequent to the first date upon which it
may be so terminated) or the net amount determined assuming no such termination.

     Consolidated Net Tangible Assets means the aggregate amount of assets
included on our most recent quarterly or annual consolidated balance sheet less
applicable reserves reflected in such balance sheet, after deducting in
accordance with generally accepted accounting principles:

     - all current liabilities reflected in such balance sheet; and

     - all goodwill, trade names, trademarks, patents, unamortized debt discount
       and expense and other like intangibles reflected in such balance sheet.

     Permitted Liens include:

     - liens existing at the date of the initial issuance of the senior debt
       securities;

     - liens on property, shares of stock, indebtedness or other assets of any
       person existing at the time such person is merged into or consolidated
       with us or any of our Subsidiaries, provided that such liens are not
       incurred in anticipation of such person becoming a Subsidiary or liens
       existing at the time of a sale, lease or other disposition of the
       properties of a person as an entirety or substantially as an entirety to
       us or any of our Subsidiaries;

     - liens on property, shares of stock, indebtedness or other assets existing
       at the time of acquisition thereof by us or any of our Subsidiaries, or
       liens thereon to secure the payment of all or any part of the purchase
       price thereof;

     - liens on property, shares of stock, indebtedness or other assets to
       secure any indebtedness for borrowed money incurred prior to, at the time
       of, or within 24 months after, the latest of the acquisition thereof, or,
       in the case of property, the completion of construction, the completion
       of development or improvements or the commencement of commercial
       operation of such property for the purpose of financing all or any part
       of the purchase price thereof, such construction or the making of such
       development or improvements;

     - liens to secure indebtedness owing to us or our Subsidiaries;

     - liens on property to secure all or part of the cost of exploration,
       drilling, or development of the property or all or any portion of the
       cost of acquiring, constructing, altering, improving, developing or
       repairing any property or asset, or improvements used in connection with
       that property or liens incurred by us or any of our Subsidiaries to
       provide funds for any such activities;

     - liens in favor of the United States of America or any state, territory or
       possession thereof (or the District of Columbia), or any department,
       agency, instrumentality or political subdivision of the United States of
       America or any state, territory or possession thereof (or the District of
       Columbia), to secure partial, progress, advance or other payments
       pursuant to any contract or statute or to secure any indebtedness
       incurred for the purpose of financing all or any part of the purchase
       price or the cost of constructing, developing or improving the property
       subject to such liens;

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<PAGE>   34

     - liens on any property to secure bonds for the construction, installation
       or financing of pollution control or abatement facilities, or other forms
       of industrial revenue bond financing, or indebtedness issued or
       guaranteed by the United States, any state or any department, agency or
       instrumentality thereof;

     - liens in respect of Production Payments and Reserve Sales and liens
       deemed to exist by reason of negative pledges in respect of indebtedness;
       and

     - liens to secure any refinancing, refunding, extension, renewal or
       replacement of any lien referred to in the bullet points above; provided,
       however, that any liens permitted by the terms set forth under any of
       such bullet points shall not extend to or cover any property of ours or
       of any of our Subsidiaries, as the case may be, other than the property
       specified in such clauses and improvements thereto or proceeds therefrom.

     Principal Property means any property interest in oil and gas reserves
owned by us or any of our Subsidiaries and which, as of the time of such
determination, is capable of producing crude oil, condensate, natural gas,
natural gas liquids or other similar hydrocarbon substances in commercial
quantities. Without limitation, the term Principal Property does not include:

     - accounts receivable and other obligations of any obligor under a contract
       for the sale, exploration, production, drilling, development, processing
       or transportation of crude oil, condensate, natural gas, natural gas
       liquids or similar hydrocarbon substances by us or any of our
       Subsidiaries, and all guarantees, insurance, letters of credit and other
       agreements or arrangements of whatever character supporting or securing
       payment of such receivables or obligations; or

     - the production or any proceeds from production of crude oil, condensate,
       natural gas, natural gas liquids or similar hydrocarbon substances.

     Production Payments and Reserve Sales means the grant or transfer by us or
any of our Subsidiaries to any person of a royalty, overriding royalty, net
profits interest, production payment (whether volumetric or dollar denominated),
partnership or other interest in oil and gas properties, reserves or the right
to receive all or a portion of the production or the proceeds from the sale of
production attributable to such properties.

     Sale and Leaseback Transaction means any arrangement with any person
providing for the leasing by us or any of our Subsidiaries of any Principal
Property, which property has been or is to be sold or transferred by us or such
Subsidiary to such person, other than:

     - any such transaction involving a lease for a term of not more than three
       years;

     - any such transaction between us and any of our Subsidiaries or between
       any of our Subsidiaries; or

     - any such transaction executed by the time of or within one year after the
       latest of the acquisition, the completion of construction, development or
       improvement or the commencement of commercial operation of such Principal
       Property.

     Subsidiary of any person means:

     - any other person in which such person or one or more of the Subsidiaries
       of that person or a combination thereof has the power to control by
       contract or otherwise the board of directors or equivalent governing body
       or otherwise controls such entity, and

     - any person of which more than 50% of the outstanding voting stock, at the
       time of such determination, is owned or controlled, directly or
       indirectly, by any person or one or more of the Subsidiaries of that
       person or a combination thereof.

     For purposes of this definition, voting stock means capital stock of the
class or classes which under ordinary circumstances has voting power to elect
the board of directors or equivalent governing body of

                                       11
<PAGE>   35

such person, provided that capital stock that carries only the right to vote
conditionally upon the occurrence of an event shall not constitute voting stock
whether or not such event shall have occurred.

MERGER, AMALGAMATION, CONSOLIDATION AND SALE OF ASSETS

     GENERAL. Each indenture generally permits a consolidation or merger between
us and another corporation or other entity. They also permit the sale by us of
all or substantially all of our property and assets. If this occurs, the
remaining or acquiring corporation or other entity will assume all of our
responsibilities and liabilities under the indentures, including the payment of
all amounts due on the debt securities and performance of the covenants in the
indentures. However, we will consolidate or merge with or into any other
corporation or other entity or sell all or substantially all of our assets only
according to the terms and conditions of the indentures. The remaining or
acquiring corporation or other entity will be substituted for us in the
indentures with the same effect as if it had been an original party to the
indentures. Thereafter, the successor corporation or other entity may exercise
our rights and powers under any indenture, in our name or in its own name. Any
act or proceeding required or permitted to be done by our board or any of our
officers may be done by the board or officers of the successor corporation or
other entity. If we sell all or substantially all of our assets, we will be
released from all our liabilities and obligations under any indenture and under
the debt securities.

     SENIOR INDENTURE. The senior indenture provides that we will not merge,
amalgamate or consolidate with or into any other entity or sell, transfer,
assign, lease, convey or otherwise dispose of all or substantially all of our
property or assets to any person, whether in a single or series of related
transactions, unless:

     - either we are the surviving entity or the surviving entity:

      -- is an entity organized under the laws of the United States, a state
         thereof or the District of Columbia, or Canada or a province thereof;
         and

      -- expressly assumes by supplemental indenture satisfactory to the
         trustee, the due and punctual payment of the principal of, premium, if
         any, and interest on all of the senior debt securities, according to
         their tenor and the due and punctual performance and observance of all
         the other covenants and conditions of the senior indenture to be
         performed by us;

     - immediately before and after giving effect to such transaction or series
       of transactions, no default or event of default has occurred and is
       continuing; and

     - we have delivered to the trustee an officer's certificate and opinion of
       counsel, each stating that:

      -- such consolidation, amalgamation, merger or other disposition, and if a
         supplemental indenture is required, the supplemental indenture, comply
         with the conditions set forth above; and

      -- all other conditions precedent to such transaction have been complied
         with.

     In addition, we may also sell, transfer, assign, lease, convey or otherwise
dispose of all or substantially all of our property to an Eligible Partnership
if such transaction satisfies the conditions set forth in the second and third
bullet points in the paragraph above, and:

     - the Eligible Partnership expressly assumes, jointly and severally with
       us, by supplemental indenture satisfactory to the trustee, the due and
       punctual payment of principal of, premium, if any, and interest on all
       the senior debt securities, according to their tenor;

     - the Eligible Partnership expressly assumes jointly and severally with us
       by supplemental indenture the due and punctual performance and observance
       of all the covenants and conditions of the senior indenture to be
       performed by us; and

     - our board of directors determines that the transaction is not adverse in
       any material respect to the interests of the holders of the senior debt
       securities as evidenced by a board resolution delivered to the trustee.

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<PAGE>   36

     In the event of any such transaction, we and the Eligible Partnership will
for all purposes of any series of senior debt securities under the senior
indenture be considered to be one and the same person.

     Eligible Partnership means a limited partnership or limited liability
company organized under the laws of the United States, a state thereof or the
District of Columbia or Canada or a province thereof, and all the outstanding
interests of which are owned directly or indirectly by us or our subsidiaries
and to which all or substantially all of our assets have been transferred in
accordance with the covenant described above.

SINKING FUND

     Except as provided in the applicable prospectus supplement, the senior debt
securities will not be redeemable prior to maturity. The senior debt securities
will not provide for any sinking fund.

SAME-DAY PAYMENT

     Santa Fe Snyder will pay principal, interest and any premium on fully
registered securities at designated places. Unless otherwise specified in a
prospectus supplement, we will make payment by check mailed to the persons in
whose names the debt securities are registered on days specified in the
indentures or any prospectus supplement.

     The senior indenture requires that payment in respect of the senior debt
securities be made by wire transfer of immediately available funds to the
accounts specified by the holders of the senior debt securities. If no such
account is specified, payment shall be made by mailing a check to the holder's
registered address.

TRANSFER

     We will maintain a corporate trust office of the trustee or another office
or agency for the purpose of transferring or exchanging fully registered
securities, without the payment of any service charge except for any tax or
governmental charge imposed in connection with that transfer or exchange.

     The senior debt securities will be issued in registered form and will be
transferrable only upon the surrender of the senior debt securities being
transferred for registration of transfer.

CONCERNING THE TRUSTEE

     The Bank of New York will serve as trustee under the senior indenture. We
have appointed the trustee to serve as the paying agent and registrar for the
senior debt securities. We may have banking relationships in the ordinary course
of business with the trustee.

GLOBAL SECURITIES

     We may issue one or more series of the debt securities as permanent global
debt securities deposited with a depositary. Unless otherwise indicated in the
prospectus supplement, the following is a summary of the depository arrangements
applicable to debt securities issued in permanent global form and for which The
Depository Trust Company acts as depositary.

     Each global debt security will be deposited with, or on behalf of, DTC, as
depositary, or its nominee and registered in the name of a nominee of DTC.
Except under the limited circumstances described below, global debt securities
are not exchangeable for definitive certificated debt securities.

     Ownership of beneficial interests in a global debt security is limited to
participants that have accounts with DTC or its nominee, or persons that may
hold interests through those participants. In addition, ownership of beneficial
interests by participants in a global debt security will be evidenced only by,
and the transfer of that ownership interest will be effected only through,
records maintained by DTC or its nominee for a global debt security. Ownership
of beneficial interests in a global debt security by persons that hold through
participants will be evidenced only by, and the transfer of that ownership
interest within that participant will be effected only through, records
maintained by that participant. DTC has no
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<PAGE>   37

knowledge of the actual beneficial owners of the debt securities. Beneficial
owners will not receive written confirmation from DTC of their purchase, but
beneficial owners are expected to receive written confirmations providing
details of the transaction, as well as periodic statements of their holdings,
from the participants through which the beneficial owners entered the
transaction.

     The laws of some jurisdictions require that certain purchasers of
securities take physical delivery of such securities in definitive form. Such
laws may impair the ability to transfer beneficial interests in a global debt
security.

     We will make payment of principal of, and interest on, debt securities
represented by a global debt security registered in the name of or held by DTC
or its nominee will be made to DTC or its nominee, as the case may be, as the
registered owner and holder of the global debt security representing those debt
securities. DTC has advised us that upon receipt of any payment of principal of,
or interest on, a global debt security, DTC will immediately credit accounts of
participants on its book-entry registration and transfer system with payments in
amounts proportionate to their respective beneficial interests in the principal
amount of that global debt security as shown in the records of DTC. Payments by
participants to owners of beneficial interests in a global debt security held
through those participants will be governed by standing instructions and
customary practices, as is now the case with securities held for the accounts of
customers in bearer form or registered in "street name," and will be the sole
responsibility of those participants, subject to any statutory or regulatory
requirements that may be in effect from time to time.

     Neither we, any trustee nor any of our respective agents, will be
responsible for any aspect of the records of DTC, any nominee or any participant
relating to, or payments made on account of, beneficial interests in a permanent
global debt security or for maintaining, supervising or reviewing any of the
records of DTC, any nominee or any participant relating to such beneficial
interests. Neither we or any of our agents nor the trustee or any of its agents
shall be liable for any delay by DTC or its nominee or its participants in
identifying the beneficial owners, and each such person may conclusively rely
on, and shall be protected in relying on, instructions from DTC or such nominee
or participants for all purposes.

     A global debt security is exchangeable for definitive debt securities
registered in the name of, and a transfer of a global debt security may be
registered to, any person other than DTC or its nominee, only if:

     - DTC notifies us that it is unwilling or unable to continue as depositary
       for that global debt security or at any time DTC ceases to be registered
       under the Exchange Act;

     - we determine in our discretion that the global debt security shall be
       exchangeable for definitive debt securities in registered form; or

     - there shall have occurred and be continuing an event of default or an
       event which, with notice or the lapse of time or both, would constitute
       an event of default under the debt securities.

     Any global debt security that is exchangeable pursuant to the preceding
sentence will be exchangeable in whole for definitive debt securities in
registered form, of like tenor and of an equal aggregate principal amount as the
global debt security, in denominations specified in the applicable prospectus
supplement, if other than $1,000 and integral multiples of $1,000. The
definitive debt securities will be registered by the registrar in the name or
names instructed by DTC. We expect that these instructions may be based upon
directions received by DTC from its participants with respect to ownership of
beneficial interests in the global debt security.

     Except as provided above, owners of the beneficial interests in a global
debt security will not be entitled to receive physical delivery of debt
securities in definitive form and will not be considered the holders of debt
securities for any purpose under the indentures. No global debt security shall
be exchangeable except for another global debt security of like denomination and
tenor to be registered in the name of DTC or its nominee. Accordingly, each
person owning a beneficial interest in a global debt security must rely on the
procedures of DTC and, if that person is not a participant, on the procedures of
the participant through which that person owns its interest, to exercise any
rights of a holder under the global debt security or the indentures.

                                       14
<PAGE>   38

     We understand that, under existing industry practices, in the event that we
request any action of holders, or an owner of a beneficial interest in a global
debt security desires to give or take any action that a holder is entitled to
give or take under the debt securities or the indentures, DTC would authorize
the participants holding the relevant beneficial interests to give or take that
action, and those participants would authorize beneficial owners owning through
those participants to give or take that action or would otherwise act upon the
instructions of beneficial owners owning through them.

     DTC has advised us that DTC is a limited purpose trust company organized
under the laws of the State of New York, a "banking organization" within the
meaning of the New York Banking Law, a member of the Federal Reserve System, a
"clearing corporation" within the meaning of the New York Uniform Commercial
Code and a "clearing agency" registered under the Exchange Act. DTC was created
to hold securities of its participants and to facilitate the clearance and
settlement of securities transactions among its participants in those securities
through electronic book-entry changes in accounts of the participants, thereby
eliminating the need for physical movement of securities certificates. DTC's
participants include securities brokers and dealers, banks, trust companies,
clearing corporations and certain other organizations. DTC is owned by a number
of its participants and by the New York Stock Exchange, Inc., the American Stock
Exchange, Inc. and the National Association of Securities Dealers, Inc. Access
to DTC's book-entry system is also available to others, such as banks, brokers,
dealers and trust companies that clear through or maintain a custodial
relationship with a participant, either directly or indirectly. The rules
applicable to DTC and its participants are on file with the SEC.

DISCHARGE AND DEFEASANCE

     We will be discharged from our obligations on the debt securities of any
series at any time if we deposit with the trustee sufficient cash or government
securities to pay the principal, interest, any premium and any other sums due to
the stated maturity date or a redemption date of the debt securities of the
series. If this happens, the holders of the debt securities of the series will
not be entitled to the benefits of the indenture except for registration of
transfer and exchange of debt securities and replacement of lost, stolen or
mutilated debt securities. In addition, we will be released from our obligations
to comply with the covenant in the indentures to provide reports and from
restrictions in the indentures on our ability to merge, consolidate or sell all
or substantially all of our assets and on our ability to cease our existence,
and the limitations in the indentures on liens and sale and leaseback
transactions with respect to securities of any series if we irrevocably deposit
with the trustee, in trust, cash or government securities to pay the principal,
interest, premium, if any, and any other sums due to the stated maturity date or
applicable redemption date of the securities of such series and we comply with
certain other conditions. If this happens, our failure to comply with the
covenants described in the preceding sentence will not constitute a default or
event of default in respect of the securities of such series.

     Under Federal income tax law as of the date of this prospectus, a discharge
described in the preceding paragraph may be treated as an exchange of the
related debt securities. Each holder might be required to recognize gain or loss
equal to the difference between the holder's cost or other tax basis for the
debt securities and the value of the holder's interest in the trust. Holders
might be required to include as income a different amount than would be
includable without the discharge. Prospective investors should seek tax advice
to determine their particular consequences of a discharge, including the
applicability and effect of tax laws other than the Federal income tax law.

     In addition, we may terminate our obligations under the securities of any
series, other than our obligation to pay the principal of, premium, if any and
accrued and unpaid interest on such securities of any series and certain other
obligations, provided that (a) we either

     (1) deliver all outstanding securities (other than securities for which
         payment amounts have been deposited with the trustee as described in
         the second preceding paragraph) to the trustee for cancellation; or

     (2) all such securities not so delivered for cancellation have either
         become due and payable or will become due and payable at their stated
         maturity within one year or are called for redemption
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<PAGE>   39

within one year, and in the case of this clause (2) we have deposited with the
trustee in trust an amount of money sufficient to pay and disclose the entire
indebtedness as such securities, including interest to the stated maturity or
applicable redemption date; and

(b) in the case of either clause (a)(1) or (a)(2) above, we comply with any
additional conditions specified to be applicable with respect to the covenant
defeasance of the securities of such series.

MEETINGS

     Each indenture contains provisions describing how meetings of the holders
of debt securities of a series may be convened. A meeting may be called at any
time by the trustee, and also, upon request, by us or the holders of at least
10% in principal amount of the outstanding debt securities of a series. A notice
of the meeting must always be given in the manner described under "-- Notices"
below. Generally speaking, except for any consent that must be given by all
holders of a series as described under "-- Modification of Indentures" above,
any resolution presented at a meeting of the holders of a series of debt
securities may be adopted by the affirmative vote of the holders of a majority
in principal amount of the outstanding debt securities of that series, unless
the indenture allows the action to be voted upon to be taken with the approval
of the holders of a different specific percentage of principal amount of
outstanding debt securities of a series. In that case, the holders of
outstanding debt securities of at least the specified percentage must vote in
favor of the action. Any resolution passed or decision taken at any meeting of
holders of debt securities of any series in accordance with the applicable
indenture will be binding on all holders of debt securities of that series and
any related coupons, unless, as discussed in "-- Modification of Indentures"
above, the action is only effective against holders that have approved it. The
quorum at any meeting called to adopt a resolution, and at any reconvened
meeting, will be holders holding or representing a majority in principal amount
of the outstanding debt securities of a series.

GOVERNING LAW

     Each indenture and the debt securities will be governed by and construed in
accordance with the laws of the State of New York, without regard to conflicts
of laws principles.

NOTICES

     Notices to holders of debt securities will be given by mail to the
addresses of such holders as they appear in the security register.

                        DESCRIPTION OF EQUITY SECURITIES

GENERAL

     As of the date of this prospectus, Santa Fe Snyder is authorized to issue
up to 350,000,000 shares of capital stock, including up to 300,000,000 shares of
common stock, par value $.01 per share, and up to 50,000,000 shares of preferred
stock, par value $.01 per share. As of June 30, 1999, we had 170,996,985 shares
of common stock and no shares of preferred stock outstanding. The number of
shares of common stock outstanding does not give effect to adjustments for
fractional shares resulting from the conversion of shares of common stock of
Snyder Oil Corporation into Santa Fe Snyder shares in the merger of Snyder into
Santa Fe Energy Resources. As of that date, we also had approximately 14,275,464
shares of common stock reserved for issuance upon exercise of options or in
connection with other awards outstanding under various employee or director
incentive, compensation and option plans. In addition, as of that date we had
3,000,000 shares of preferred stock authorized for issuance as Series A Junior
Participating Preferred Stock under the rights agreement of Santa Fe Snyder. For
a description of the rights agreement, see "-- Stockholder Rights Agreement" on
page 18 of this prospectus.

     The following is a summary of the key terms and provisions of Santa Fe
Snyder's equity securities. You should refer to the applicable provisions of our
Restated Certificate of Incorporation, Bylaws, the

                                       16
<PAGE>   40

Delaware General Corporation Law and the documents we have incorporated by
reference for a complete statement of the terms and rights of our capital stock.

SECTION 203 OF THE DELAWARE GENERAL CORPORATION LAW

     Santa Fe Snyder is a Delaware corporation subject to Section 203 of the
Delaware General Corporation Law (the DGCL). Generally, Section 203 prohibits a
publicly held Delaware corporation from engaging in a "business combination"
with an "interested stockholder" for a period of three years after the date of
the transaction in which the person became an interested stockholder, unless (1)
prior to such date, either the business combination or such transaction which
resulted in the stockholder becoming an interested stockholder is approved by
the board of directors of the corporation, (2) upon consummation of the
transaction which resulted in the stockholder becoming an interested
stockholder, the interested stockholder owns at least 85% of the outstanding
voting stock, or (3) on or after such date, the business combination is approved
by the board of directors of the corporation and by the affirmative vote at
least 66 2/3% of the outstanding voting stock that is not owned by the
interested stockholder. A "business combination" includes mergers, asset sales
and other transactions resulting in a financial benefit to the interested
stockholder. An "interested stockholder" is a person who, together with
affiliates and associates, owns, or, within three years, did own, 15% or more of
the corporation's outstanding voting stock.

LIMITATION ON CHANGES IN CONTROL

     Certain of the above provisions of Santa Fe Snyder's Restated Certificate
of Incorporation and By-Laws and the provisions of Section 203 of the DGCL could
have the effect of delaying, deferring or preventing a change in control of
Santa Fe Snyder or the removal of existing management or deterring potential
acquirors from making an offer to stockholders of Santa Fe Snyder. This could be
the case notwithstanding that a majority of the stockholders might benefit from
such a change in control or offer. In addition, the issuance of shares of
preferred stock, or the issuance of rights to purchase such shares, could be
used to discourage an unsolicited acquisition proposal. For instance, the
issuance of a series of preferred stock might impede a business combination by
including voting rights that would provide a required percentage vote of the
stockholders. In addition, under certain circumstances, the issuance of
preferred stock could adversely affect the voting power of the holders of common
stock.

PROVISIONS OF THE RESTATED CERTIFICATE OF INCORPORATION AND BYLAWS

     Santa Fe Snyder's Restated Certificate of Incorporation provides that
stockholders may not act by written consent in lieu of a meeting. The Restated
Certificate of Incorporation further provides that the number of directors will
not be fewer than three nor more than 15. It also provides for a classified
board of directors, consisting of three classes as nearly equal in size as
practicable. Each class holds office until the third annual stockholders'
meeting for the election of directors after the annual meeting at which that
class was elected. An amendment to the Restated Certificate of Incorporation
relating to the composition and classification of the board of directors, an
amendment of the Santa Fe Snyder bylaws, the issuance of rights to purchase
Santa Fe Snyder capital stock and limitations on the liability of directors,
requires the vote of at least 80% of the stockholders entitled to vote in an
election of directors, voting together as a single class.

COMMON STOCK

     The holders of common stock of Santa Fe Snyder are entitled to one vote for
each share held of record on all matters submitted to a vote of stockholders.
Cumulative voting rights are denied. Subject to preferences that may be
applicable to any outstanding preferred stock, holders of common stock are
entitled to receive ratably dividends as they may be declared by the board of
directors of Santa Fe Snyder out of funds legally available for dividends. In
the event of a liquidation or dissolution, holders of common stock are entitled
to share ratably in all assets remaining after payment of liabilities and the
liquidation preference of any outstanding preferred stock.

                                       17
<PAGE>   41

     Holders of common stock have no preemptive rights and have no rights to
convert their common stock into any other securities. The common stock is not
redeemable or entitled to the benefits of any sinking fund. All of the
outstanding shares of common stock are, and any additional common stock issued
will be, duly authorized, validly issued, fully paid and nonassessable. First
Chicago Trust Company of New York is the transfer agent and registrar for the
common stock.

     Santa Fe Snyder's outstanding shares of common stock are listed on the New
York Stock Exchange under the symbol "SFS". Any additional common stock issued
will also be listed on the NYSE.

PREFERRED STOCK

     Santa Fe Snyder may issue shares of preferred stock in one or more series.
Santa Fe Snyder will determine the dividend, voting, conversion and other rights
of the series being offered and the terms and conditions relating to its
offering and sale at the time of the offer and sale.

     Santa Fe Snyder's board is authorized to designate any series of preferred
stock and the powers, preferences and rights of the shares of such series and
the qualifications, limitations or restrictions thereof without further action
by the holders of the common stock. There are 3,000,000 shares designated as
Series A Junior Participating Preferred Stock. As of June 30, 1999, there were
no shares of Series A Junior Participating Preferred Stock outstanding.

     The particular terms of any series of preferred stock being offered by us
under this shelf registration will be described in the applicable prospectus
supplement relating to that series of preferred stock. Those terms may include:

     - the number of shares of the series of preferred stock being offered;

     - the title and liquidation preference per share of that series of the
       preferred stock;

     - the purchase price of the preferred stock;

     - the dividend rate or method for determining the dividend rate;

     - the dates on which dividends will be paid;

     - whether dividends on that series of preferred stock will be cumulative or
       non-cumulative and, if cumulative, the dates from which dividends shall
       commence to accumulate;

     - any redemption or sinking fund provisions applicable to that series of
       preferred stock;

     - any conversion provisions applicable to that series of preferred stock;
       or

     - any additional dividend, liquidation, redemption, sinking fund and other
       rights and restrictions applicable to that series of preferred stock.

     You should also refer to the certificate of designations relating to the
series of the preferred stock for the complete terms of that preferred stock.
The certificate of designations for a particular series of preferred stock will
be filed with the SEC promptly after the offering of that series of preferred
stock.

     The preferred stock will, when issued, be fully paid and nonassessable.
Unless otherwise specified in the applicable prospectus supplement, in the event
we liquidate, dissolve or wind up our business, each series of preferred stock
will have the same rank as to dividends and distributions as each other series
of the preferred stock we may issue in the future. The preferred stock will have
no preemptive rights.

     First Chicago Trust Company of New York will be the transfer agent,
registrar and dividend disbursement agent for the preferred stock.

STOCKHOLDER RIGHTS AGREEMENT

     Santa Fe Snyder has entered into a stockholder rights agreement, as
amended, with First Chicago Trust Company of New York as rights agent. Pursuant
to the rights agreement, rights attach to each share

                                       18
<PAGE>   42

of common stock outstanding and entitle the registered holder to purchase from
Santa Fe Snyder one one-hundredth of a share of Series A Junior Participating
Preferred Stock at a purchase price of $42, which is subject to adjustment as
described in the rights agreement. Each share of common stock outstanding has
one right attached to it.

     The rights will separate from the common stock upon the earlier of:

     - 10 business days following a public announcement that, subject to certain
       exceptions, a person or group of affiliated or associated persons, also
       referred to as an acquiring person, has acquired or obtained the right to
       acquire beneficial ownership of 15% or more of the outstanding shares of
       common stock, with the date of this event referred to as the stock
       acquisition date; or

     - 10 business days or a later date as may be fixed by the board of
       directors following the commencement of, or announcement of an intention
       to make, a tender offer or exchange offer that would result in a person
       or group beneficially owning 15% or more of the outstanding shares of
       common stock.

     The date of this event is referred to as the distribution date.

     Until the distribution date:

     - the rights will be evidenced by common stock certificates with a copy of
       a summary of the terms of the rights attached and will be transferred
       with and only with common stock certificates;

     - new common stock certificates will contain a notation incorporating the
       rights agreement by reference; and

     - the transfer of any certificates representing outstanding common stock
       will also constitute the transfer of the rights associated with common
       stock represented by the certificate.

     The rights will not be exercisable until the distribution date and will
cease to be exercisable at the close of business on July 25, 1999, unless this
date is extended or unless the rights are earlier redeemed or exchanged by Santa
Fe Snyder, as described below.

     If Santa Fe Snyder is acquired in a merger or other business combination
transaction or 50% or more of its consolidated assets or earnings power are sold
after a person or group has become a acquiring person, each holder of a right,
other than rights beneficially owned by a acquiring person which will be void,
will have the right to receive, upon the exercise of the right at the current
exercise price of the right, that number of shares of common stock of the
acquiring person which at the time of such transaction will have a market value
of two times the exercise price of the right. In the event that any person or
group of affiliated or associated persons becomes a acquiring person, each
holder of a right, other than rights beneficially owned by the acquiring person
which will then be void, will have the right to receive upon exercise that
number of shares of common stock having a market value of two times the exercise
price of the right.

     In general, Santa Fe Snyder may redeem the rights in whole, but not in
part, at any time until 10 days following the stock acquisition date, which
period may be extended at any time while the rights are still redeemable, at a
price of $.01 per right, payable in cash, common stock or other consideration
deemed appropriate by the board. Immediately upon the action of the board
ordering redemption of the rights, the rights will terminate and the only right
of the holders of rights will be to receive the $.01 per right redemption price.

     Until a right is exercised, the holder of a right will have no rights as a
stockholder of Santa Fe Snyder, including the right to vote or to receive
dividends, due to his status as a holder of a right.

     Other than reducing the purchase price of the rights, any of the provisions
of the rights agreement may be amended by the board prior to the distribution
date, without the consent of the holders of the rights, to shorten or lengthen
any time period or otherwise. After the distribution date, the provisions of

                                       19
<PAGE>   43

the rights agreement may be amended by the board, without the consent of the
holders of the rights, except that:

     - no amendment can be made to reduce the purchase price;

     - no amendment may adversely affect the interests of the holders of the
       rights; and

     - the redemption right cannot be reinstated.

                   DESCRIPTION OF TRUST PREFERRED SECURITIES

     Each trust may issue in one or more offerings only one series of trust
preferred securities having terms described in its respective prospectus
supplement. The declaration of each trust authorizes the administrative trustees
to issue on behalf of that trust one series of trust preferred securities. The
declaration, as amended in connection with the sale of trust preferred
securities, will be qualified as an indenture under the Trust Indenture Act.

     The trust preferred securities will have such terms, including
distributions, redemption, voting, conversion, exchange, liquidation rights and
such other preferred, deferred or other special rights or such restrictions as
are set forth in the declaration or made part of the declaration by the Trust
Indenture Act. You may refer to the prospectus supplement relating to the trust
preferred securities of the trust for specific terms, including:

     - the distinctive designation of the trust preferred securities;

     - the number of trust preferred securities issued by each trust;

     - the annual distribution rate (or method of determining such rate) for
       trust preferred securities issued by the trust and the date or dates upon
       which the distributions are payable;

     - the date or dates or method of determining the date or dates from which
       distributions on trust preferred securities will be cumulative;

     - the amount or amounts that will be paid out of the assets of the trust to
       the holders of trust preferred securities upon voluntary or involuntary
       dissolution, winding-up or termination of the trust;

     - the obligation, if any, of the trust to purchase or redeem the trust
       preferred securities and the price or prices at which, the period or
       periods within which, and the terms and conditions upon which, trust
       preferred securities will be purchased or redeemed, in whole or in part,
       pursuant to that obligation;

     - the voting rights, if any, of trust preferred securities in addition to
       those required by law, including the number of votes per trust preferred
       security and any requirement for the approval by the holders of trust
       preferred securities, as a condition to specified action or amendments to
       the declaration of the trust;

     - the terms and conditions, if any, upon which the assets of the trust may
       be distributed to holders of trust preferred securities;

     - provisions regarding convertibility or exchangeability of the trust
       preferred securities for capital stock or debt securities of Santa Fe
       Snyder;

     - if applicable, any securities exchange upon which the trust preferred
       securities will be listed; and

     - any other relevant rights, preferences, privileges, limitations or
       restrictions of trust preferred securities not inconsistent with the
       declaration of the trust or with applicable law.

     Santa Fe Snyder will guarantee all trust preferred securities offered to
the limited extent set forth below under "Description of the Trust Preferred
Securities Guarantees."

                                       20
<PAGE>   44

     Any U.S. federal income tax considerations applicable to any offering of
trust preferred securities will be described in the applicable prospectus
supplement.

     In connection with the issuance of trust preferred securities, each trust
will issue one series of trust common securities. The declaration of each trust
authorizes the administrative trustees of the trust to issue on behalf of the
trust one series of trust common securities having such terms including
distributions, redemption, voting, liquidation rights or such restrictions as
will be set forth therein. The terms of the trust common securities issued by
each trust will be substantially identical to the terms of the trust preferred
securities issued by the trust. The trust common securities will rank equally,
and payments will be made on the trust common securities pro rata, with the
trust preferred securities. However, upon an event of default under the
declaration, the rights of the holders of the trust common securities to payment
in respect of distributions and payments upon liquidation, redemption and
otherwise will be subordinated to the rights of the holders of the trust
preferred securities. Except in certain limited circumstances, the trust common
securities will also carry the right to vote to appoint, remove or replace any
of the trustees of a trust. All of the trust common securities of each trust
will be directly or indirectly owned by Santa Fe Snyder.

            DESCRIPTION OF THE TRUST PREFERRED SECURITIES GUARANTEES

     A summary of information concerning the trust guarantees which will be
executed and delivered by Santa Fe Snyder from time to time for the benefit of
the holders of the trust preferred securities is set forth below. Each trust
guarantee will be qualified as an indenture under the Trust Indenture Act. The
Bank of New York will act as the trust guarantee trustee, or indenture trustee,
under each trust guarantee. The terms of each trust guarantee will be those set
forth in that trust guarantee and those made part of that trust guarantee by the
Trust Indenture Act. The following is a summary of the material terms and
provisions of the trust preferred securities guarantees. You should refer to the
provisions of the form of trust guarantee and the Trust Indenture Act. Santa Fe
Snyder has filed the form of trust guarantee as an exhibit to the registration
statement of which this prospectus is a part. Each trust guarantee will be held
by the trust guarantee trustee for the benefit of the holders of the trust
preferred securities of the applicable trust.

GENERAL

     Under each trust guarantee, Santa Fe Snyder will irrevocably and
unconditionally agree, to the extent set forth in each applicable trust
guarantee, to pay the trust guarantee payments (as defined below) in full to the
holders of the trust preferred securities issued by a trust, to the extent not
paid by or on behalf of the applicable trust, as and when due, regardless of any
defense, right of set-off or counterclaim which the trust may have or assert.

     The following payments with respect to trust preferred securities of any
trust to the extent not paid by the trust (the trust guarantee payments), will
be subject to the related trust guarantee on:

     - any accrued and unpaid distributions required to be paid on the trust
       preferred securities, to the extent that trust will have funds legally
       and immediately available for payment;

     - the redemption price, including all accrued and unpaid distributions to
       the date of redemption, to the extent that trust has funds available
       therefor, with respect to any trust preferred securities called for
       redemption by that trust; and

     - upon dissolution, winding-up or termination of that trust (other than in
       connection with the distribution of the assets of that trust to the
       holders of trust preferred securities or the redemption of all of the
       trust preferred securities), the lesser of (a) the aggregate of the
       liquidation amount and all accrued and unpaid distributions on the trust
       preferred securities to the date of payment, to the extent that trust has
       funds available therefor and (b) the amount of assets of that trust
       remaining available for distribution to holders of that trust preferred
       securities in liquidation of the trust.
                                       21
<PAGE>   45

     Santa Fe Snyder's obligation to make a trust guarantee payment may be
satisfied by Santa Fe Snyder's direct payment of the required amounts to the
holders of the applicable trust preferred securities or by causing the
applicable trust to pay such amounts to such holders.

     Each trust guarantee will be a full and unconditional guarantee with
respect to the applicable trust preferred securities, but will not apply to any
payment of distributions when the applicable trust does not have funds legally
and immediately available for such payment. If Santa Fe Snyder does not make
interest payments on the subordinated debt securities purchased by a trust, the
applicable trust will not pay distributions on the trust preferred securities
issued by that trust and will not have funds available for such payment. See
"Description of Debt Securities -- Covenants" included in this prospectus.

     Santa Fe Snyder has also agreed separately to irrevocably and
unconditionally guarantee the obligations of the trusts with respect to the
trust common securities (the trust common securities guarantees) to the same
extent as the trust guarantees, except that upon an event of default under the
subordinated indenture relating to the subordinated debt securities purchased by
that trust, holders of trust preferred securities will have priority over
holders of trust common securities with respect to distributions and payments on
liquidation, redemption or otherwise.

COVENANTS

     In each trust guarantee, Santa Fe Snyder will covenant that, so long as any
trust preferred securities remain outstanding, if any event that would
constitute an event of default under the trust guarantee or the declaration of
the applicable trust occurs, then Santa Fe Snyder will not declare or pay any
dividend on, make any distributions with respect to, or redeem, purchase or make
any liquidation payment with respect to, any of its capital stock with certain
exceptions. The exceptions include (1) purchases or acquisitions of shares of
Santa Fe Snyder common stock in connection with or of its obligations under any
employee benefit plans or of its obligations pursuant to any contract or
security requiring Santa Fe Snyder to purchase shares of Santa Fe Snyder common
stock or, (2) the purchase of fractional interests in shares of Santa Fe Snyder
capital stock as a result of a reclassification of Santa Fe Snyder capital stock
or the exchange or conversion of one class or series of Santa Fe Snyder capital
stock for another class or series of Santa Fe Snyder capital stock or make any
guarantee payments with respect to the foregoing. Additionally, Santa Fe Snyder
will not make any payment of interest, principal or premium, if any, on or
repay, repurchase or redeem any debt securities, including guarantees, issued by
Santa Fe Snyder which rank equally with or junior to the subordinated debt
securities.

MODIFICATION OF THE TRUST GUARANTEES; ASSIGNMENT

     Except with respect to any changes which do not adversely affect the rights
of holders of trust preferred securities, in which case no vote will be
required, each trust guarantee may be amended only with the prior approval of
the holders of not less than a majority in liquidation amount of the outstanding
trust preferred securities of the applicable trust. The manner of obtaining any
such approval of holders of the trust preferred securities will be described in
an accompanying prospectus supplement. All guarantees and agreements contained
in a trust guarantee will bind the successors, assigns, receivers, trustees and
representatives of Santa Fe Snyder and will inure to the benefit of the holders
of the trust preferred securities of the applicable trust then outstanding.

TERMINATION

     Each trust guarantee will terminate as to the trust preferred securities of
the applicable trust upon the first to occur of:

     - full payment of the redemption price of all trust preferred securities of
       the applicable trust;

     - distribution of the assets of the trust to the holders of the trust
       preferred securities of the applicable trust; and

                                       22
<PAGE>   46

     - full payment of the amounts payable upon liquidation of the trust in
       accordance with the declaration of the trust.

     Each trust guarantee will continue to be effective or will be reinstated,
as the case may be, if at any time any holder of trust preferred securities
issued by the applicable trust must restore payment of any sums paid under the
trust preferred securities or the trust guarantee.

EVENTS OF DEFAULT

     An event of default under a trust guarantee will occur upon the failure of
Santa Fe Snyder to perform any of its payment or other obligations under that
trust guarantee.

     The holders of a majority in liquidation amount of the trust preferred
securities to which the trust guarantee relates have the right to direct the
time, method and place of conducting any proceeding for any remedy available to
the trust guarantee trustee in respect of the trust guarantee or to direct the
exercise of any trust or power conferred upon the trust guarantee trustee under
the trust preferred securities guarantee. If the trust guarantee trustee fails
to enforce the trust guarantee, any holder of trust preferred securities
relating to the trust guarantee may institute a legal proceeding directly
against Santa Fe Snyder to enforce the trust guarantee trustee's rights under
the trust guarantee, without first instituting a legal proceeding against the
relevant trust, the trust guarantee trustee or any other person or entity.
However, if Santa Fe Snyder has failed to make a guarantee payment, a holder of
trust preferred securities may directly institute a proceeding against Santa Fe
Snyder for enforcement of the trust guarantee for such payment. Santa Fe Snyder
waives any right or remedy to require that any action be brought first against
the trust or any other person or entity before proceeding directly against Santa
Fe Snyder.

STATUS OF THE TRUST GUARANTEES

     The trust guarantees will constitute unsecured obligations of Santa Fe
Snyder and will rank

     - subordinate and junior in right of payment to all other liabilities of
       Santa Fe Snyder, except those obligations or liabilities made equal in
       priority or subordinate by their terms;

     - equally with the most senior preferred or preference stock that may be
       issued by Santa Fe Snyder and with any guarantee that may be entered into
       by Santa Fe Snyder in respect of any preferred or preference stock of any
       affiliate of Santa Fe Snyder; and

     - senior to the Santa Fe Snyder common stock.

     The terms of the trust preferred securities provide that each holder of
trust preferred securities of the applicable trust, by acceptance thereof,
agrees to the subordination provisions and other terms of the trust guarantee
relating to the applicable trust preferred securities.

     The trust guarantees will constitute a guarantee of payment and not of
collection. Accordingly, the guaranteed party may institute a legal proceeding
directly against the guarantor to enforce its rights under the trust guarantee
without instituting a legal proceeding against any other person or entity.

INFORMATION CONCERNING THE TRUST GUARANTEE TRUSTEE

     Prior to the occurrence of a default with respect to a trust guarantee and
after the curing or waiving of all events of default with respect to that trust
guarantee, the trust guarantee trustee undertakes to perform only those duties
as are specifically set forth in that trust guarantee. In case an event of
default has occurred and has not been cured or waived, the guarantee trustee
will exercise the same degree of care as a prudent individual would exercise in
the conduct of his or her own affairs. Subject to these provisions, the trust
guarantee trustee is under no obligation to exercise any of the powers vested in
it by a trust guarantee at the request of any holder of trust preferred
securities, unless offered indemnity against the costs, expenses and liabilities
which might be incurred thereby satisfactory to the trust guarantee trustee.

                                       23
<PAGE>   47

     Santa Fe Snyder and certain of its affiliates may, from time to time,
maintain a banking relationship with the trust guarantee trustee.

GOVERNING LAW

     The trust guarantees will be governed by, and construed in accordance with,
the laws of the State of New York.

               RELATIONSHIP AMONG THE TRUST PREFERRED SECURITIES,
              THE SUBORDINATED DEBT SECURITIES AND THE GUARANTEES

     As long as Santa Fe Snyder makes payments of interest and other payments
when due on the subordinated debt securities, those payments will be sufficient
to cover distributions and other payments due on the trust preferred securities,
primarily because:

     - the aggregate principal amount of the subordinated debt securities will
       be equal to the sum of the aggregate stated liquidation preference of the
       trust securities;

     - the interest rate and interest and other payment dates of the
       subordinated debt securities will match the distribution rate and
       distribution and other payment dates for the trust preferred securities;

     - Santa Fe Snyder will pay for all and any costs, expenses and liabilities
       of the trusts except the trusts' obligations to holders of the trust
       preferred securities under the trust preferred securities of the trusts;
       and

     - the declaration of each trust further provides that the trust will not
       engage in any activity that is not consistent with the limited purposes
       of the trust.

     Payments of distributions and other amounts due on the trust preferred
securities of a trust, to the extent the trust has funds available for the
payment of such distributions, are irrevocably guaranteed by Santa Fe Snyder as
and to the extent set forth under "Description of the Trust Preferred Securities
Guarantees." Taken together, Santa Fe Snyder's obligations under the
subordinated debt securities, the subordinated indenture, the declarations of
the trusts and the trust guarantees provide a full, irrevocable and
unconditional guarantee of payments of distributions and other amounts due on
the trust preferred securities. No single document standing alone or operating
in conjunction with fewer than all of the other documents constitutes such
guarantee. It is only the combined operation of these documents that has the
effect of providing a full, irrevocable and unconditional guarantee of each of
the trust's obligations under the trust preferred securities. If and to the
extent that Santa Fe Snyder does not make payments on the subordinated debt
securities, the trusts will not pay distributions or other amounts due on the
trust preferred securities. The trust guarantees do not cover payment of
distributions when the applicable trust does not have sufficient funds to pay
such distributions. In such event, the remedies of a holder of the trust
preferred securities of the trust are described herein under "Description of the
Trust Preferred Securities Guarantees -- Events of Default." The obligations of
Santa Fe Snyder under the trust guarantees are unsecured and are subordinate and
junior in right of payment to all other liabilities of Santa Fe Snyder.

     Notwithstanding anything to the contrary in the subordinated indenture and
to the extent set forth in the subordinated indenture, Santa Fe Snyder has the
right to set-off any payment it is otherwise required to make under the
subordinated indenture with and to the extent Santa Fe Snyder has theretofore
made, or is concurrently on the date of such payment making, a payment under a
trust guarantee.

     A holder of trust preferred securities of a trust may institute a legal
proceeding directly against Santa Fe Snyder to enforce its rights under the
trust guarantee with respect to the trust without first instituting a legal
proceeding against the trust guarantee trustee, the trust or any other person or
entity.

     The trust preferred securities of a trust evidence a beneficial interest in
the trust. The trusts exist for the sole purpose of issuing the trust securities
and investing the proceeds of such issuance in subordinated

                                       24
<PAGE>   48

debt securities. A principal difference between the rights of a holder of trust
preferred securities and a holder of subordinated debt securities is that a
holder of subordinated debt securities is entitled to receive from Santa Fe
Snyder the principal amount of and interest accrued on subordinated debt
securities held, while a holder of trust preferred securities is entitled to
receive distributions from a trust, or from Santa Fe Snyder under the trust
guarantee, if and to the extent the trust has funds available for the payment of
such distributions.

     Upon any voluntary or involuntary termination, winding-up or liquidation of
a trust involving the liquidation of the subordinated debt securities, the
holders of the trust preferred securities of the trust will be entitled to
receive, out of assets held by the trust and after satisfaction of liabilities
to creditors of the trust as provided by applicable law, the liquidation
distribution in cash. See "Description of Trust Preferred Securities." Upon any
voluntary or involuntary liquidation or bankruptcy of Santa Fe Snyder, the
property trustees of a trust, as holder of the subordinated debt securities of
the trust, would be a subordinated creditor of Santa Fe Snyder, subordinated in
right of payment to all senior debt of Santa Fe Snyder, but entitled to receive
payment in full of principal and interest, before any stockholders of Santa Fe
Snyder receive payments or distributions. Since Santa Fe Snyder is the guarantor
under the trust guarantees and has agreed to pay for all costs, expenses and
liabilities of the trusts other than the trusts' obligations to the holders of
the trust preferred securities, the positions of a holder of trust preferred
securities and a holder of subordinated debt securities relative to other
creditors and to shareholders of Santa Fe Snyder in the event of liquidation or
bankruptcy of Santa Fe Snyder would be substantially the same.

     A default or event of default under any senior debt of Santa Fe Snyder will
not constitute a default or event of default under the subordinated indenture.
However, in the event of payment defaults under, or acceleration of, senior debt
of Santa Fe Snyder, the subordination provisions of the subordinated indenture
provide that no payments may be made in respect of the subordinated debt
securities until senior debt has been paid in full or any payment default
thereunder has been cured or waived. Failure to make required payments on the
subordinated debt securities would constitute an event of default under the
subordinated indenture with respect thereto.

                                 LEGAL OPINIONS

     The legality of the securities will be passed upon for us by Andrews &
Kurth L.L.P., Houston, Texas. If the securities are being distributed in an
underwritten offering, certain legal matters will be passed upon for the
underwriters by counsel identified in the related prospectus supplement.

                                    EXPERTS

     The financial statements incorporated in this prospectus by reference to
the Annual Report on Form 10-K/A of Santa Fe Energy Resources, Inc. for the year
ended December 31, 1998, have been so incorporated in reliance on the report of
PricewaterhouseCoopers LLP, independent accountants, given on the authority of
said firm as experts in auditing and accounting.

     The financial statements incorporated in this prospectus by reference to
Snyder Oil Corporation's Annual Report on Form 10-K/A, for the year ended
December 31, 1998, have been so incorporated in reliance on the report of Arthur
Andersen LLP, independent accountants, given on the authority of said firm as
experts in auditing and accounting.

                                       25
<PAGE>   49
================================================================================

     No dealer, salesperson or other person is authorized to give any
information or to represent anything not contained in this prospectus. You must
not rely on any unauthorized information or representations. This prospectus is
an offer to sell only the shares offered hereby, but only under circumstances
and in jurisdictions where it is lawful to do so. The information contained in
this prospectus is current only as of its date.

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

                               TABLE OF CONTENTS

                             Prospectus Supplement

<TABLE>
<CAPTION>
                                       Page
                                       ----
<S>                                    <C>
Prospectus Supplement Summary........   S-1
Risk Factors.........................  S-13
Use of Proceeds......................  S-15
Capitalization.......................  S-16
Price Range of Common Stock and
  Dividend Policy....................  S-17
Experts..............................  S-17
Validity of Securities...............  S-17
Underwriting.........................  S-18
Glossary of Commonly Used Oil and Gas
  Terms..............................   A-1

                Prospectus
About This Prospectus................     1
Where You Can Find More Information..     1
Forward-Looking Statements...........     2
Santa Fe Snyder Corporation..........     2
The Trusts...........................     2
Use of Proceeds......................     3
Ratio of Earnings to Fixed Charges...     4
Plan of Distribution.................     4
Description of Debt Securities.......     5
Description of Equity Securities.....    16
Description of Trust Preferred
  Securities.........................    20
Description of Trust Preferred
  Securities Guarantees..............    21
Relationship Among the Trust
  Preferred Securities, the
  Subordinated Debt Securities and
  the Guarantees.....................    24
Legal Opinions.......................    25
Experts..............................    25
</TABLE>

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

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

                               11,000,000 Shares

                          SANTA FE SNYDER CORPORATION

                                  Common Stock

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

                             [Santa Fe Snyder Logo]

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

                              GOLDMAN, SACHS & CO.

                           CREDIT SUISSE FIRST BOSTON

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