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                                                                     EXHIBIT 2.2

                                February 11, 1999


PETROLEUM DEVELOPMENT CORPORATION
9720-B CANDELARIA  N.E.
ALBUQUERQUE, NM.  87112
ATTN: MR. JIM C. JOHNSON, JR.

                                 RE:      Amendment to Letter Agreement
                                          Dated February 4, 1999
                                          H. E. White Unit
                                          Freestone County, Texas

Dear Jim,

         This letter, when countersigned by you, shall serve to evidence our
agreement to amend the above captioned Letter Agreement dated February 4, 1999
covering the Venus Working Interest in the H. E. White Unit, Freestone County,
Texas (Letter Agreement) as follows:

         A.   The second sentence of provision 4. Closing of the Letter
              Agreement is hereby deleted in its entirety and the following
              sentence is hereby inserted in lieu thereof:

                  "At the closing PEDCO will pay by wire transfer, cashier's
                  check or other good funds the purchase price specified in
                  paragraph 1 above to Ellis G. Vickers, attorney, as escrow
                  agent or such other escrow agent, party or parties, as may be
                  designated jointly by Venus and PEDCO."

         B.   The following language is hereby added to the end of Provision 4,
              Closing of the Letter Agreement:

                  "It is understood that Venus' interest is currently subject to
                  a lien in favor of its lender, Wells Fargo Bank, and Venus
                  shall provide the recordable instrument(s) necessary to effect
                  a release of said lien. Upon receipt of the assignment and
                  release of lien by the escrow agent, PEDCO shall authorize and
                  direct the escrow agent to release by bank cashier's check or
                  wire transfer to Wells Fargo Bank, for the account of Venus,
                  $650,000.00 out of the sales proceeds as is required by said
                  bank for executing the subject release. In addition, PEDCO and
                  Venus shall authorize and direct the escrow agent to remit
                  payment by cashier's check to the operator of the H. E. White
                  Unit #2 well the sum of $175,609.13 for all costs, expenses
                  and joint interest billings currently owed by


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                  Venus for its interest in said well, up through December 31,
                  1998. It is understood and agreed that Venus shall remain
                  responsible for all costs and expenses attributable to said H.
                  E. White #2 well up through December 31, 1998 even though the
                  same may be reflected on or included in a statement, invoice
                  or billing dated and/or received thereafter. It is understood
                  and agreed by Venus and PEDCO that Venus shall be entitled to
                  receive all proceeds attributable to its interest in
                  production from said H. E. White #2 well up through December
                  31, 1998. Lastly, PEDCO and Venus shall authorize and direct
                  the escrow agent to hold in escrow the sum of $100,000.00
                  until such time as the title discrepancy on approximately 2.5%
                  of the total working interest out of Venus' 25% of the total
                  working interest is resolved to the joint satisfaction of
                  PEDCO and Venus. PEDCO shall authorize and direct the escrow
                  agent to disburse the remaining balance of the purchase price
                  to Venus, as Venus may direct. If the subject title
                  discrepancy on the approximate 2.5% of the total working
                  interest is resolved to the mutual satisfaction of Venus and
                  PEDCO within 90 days after Closing, then PEDCO shall authorize
                  and direct the escrow agent to pay the escrowed $100,000.00
                  plus any accrued interest to Venus. If Venus and PEDCO are
                  unable to jointly agree within 90 days following closing that
                  the title discrepancy on said approximately 2.5% of the total
                  working interest has been resolved, then the disputed interest
                  will automatically revert to Venus and the escrowed
                  $100,000.00 plus any accrued interest shall be paid by the
                  escrow agent to PEDCO. Venus and PEDCO agree to execute and
                  deliver such instruments in recordable form as may be
                  necessary or useful in documenting said automatic reversion to
                  Venus, including without limitation a reassignment of such
                  interest to Venus effective as of December 31, 1998."

         C.   The last sentence of the second paragraph of provision 6. Interest
              Delivered of the Letter Agreement is hereby deleted and the
              following language is inserted in lieu thereof:

                  "The parties hereto agree that PEDCO shall receive the
                  reversionary rights, if any exist, to said overriding royalty
                  interest, however, no deductions or adjustments shall be made
                  to the purchase price regardless of the actual ownership of
                  said interest and it is understood and agreed by PEDCO that
                  Venus makes no warranties, either expressed or implied, as to
                  said overriding royalty interest. In addition, said overriding
                  royalty interest shall not be subject to any title objections
                  by PEDCO."

         D.   The following new and additional provision 8 shall be added to the
              Letter Agreement:

                  "8. Affiliates/Related Parties. The parties hereby agree that
                  the assignment or conveyance from Venus provided herein shall
                  be to and in favor of Warren Resources, Inc. a New York
                  Corporation, which is an affiliate of and related party to
                  PEDCO."


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         If the above amendments to our Letter Agreement are acceptable to you,
please evidence your agreement to and acceptance of same by dating and signing
the enclosed copy and returning it to this office by facsimile transmission to
210-930-4901 and mailing the original to the letterhead address.

                                          Very truly yours,

                                          /s/ JOHN Y. AMES

                                          John Y. Ames
                                          President and COO






AGREED TO AND ACCEPTED this ________ day of February, 1999.


PETROLEUM DEVELOPMENT CORPORATION (PEDCO)


BY: /s/ JIM C. JOHNSON, JR.
   ----------------------------------
    Jim C. Johnson, Jr., President