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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549



                                  SCHEDULE 13G

                    UNDER THE SECURITIES EXCHANGE ACT OF 1934

                                 (RULE 13d-102)

                 INFORMATION TO BE INCLUDED IN STATEMENTS FILED
          PURSUANT TO RULE 13d-1(b)(c), AND (d) AND AMENDMENTS THERETO
                         FILED PURSUANT TO RULE 13d-2(b)

                               (AMENDMENT NO. 1)*


                           Encore Acquisition Company
--------------------------------------------------------------------------------
                                (Name of Issuer)


                                  Common Stock
--------------------------------------------------------------------------------
                         (Title of Class of Securities)


                                    29255W100
               -------------------------------------------------
                                 (CUSIP Number)


                                 January 1, 2003
--------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)


Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

         [ ]  Rule 13d-1(b)

         [ ]  Rule 13d-1(c)

         [X]  Rule 13d-1(d)

         * The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which would
alter the disclosures provided in a prior cover page.

         The information required in the remainder of this cover page shall not
be deemed to be "filed" for the purpose of Section 18 of the Securities
Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that
section of the Act but shall be subject to all other provisions of the Act
(however, see the Notes).



POTENTIAL PERSONS WHO ARE TO RESPOND TO THE COLLECTION OF INFORMATION CONTAINED
IN THIS FORM ARE NOT REQUIRED TO RESPOND UNLESS THE FORM DISPLAYS A CURRENTLY
VALID OMB CONTROL NUMBER.



SEC 1745 (3-98)



                                  SCHEDULE 13G


ISSUER: Encore Acquisition Company                          CUSIP NO.: 29255W100

--------------------------------------------------------------------------------
   1.   Names of Reporting Persons.
        I.R.S. Identification Nos. of above persons (entities only).

        J.P. Morgan Partners (SBIC), LLC (formerly known as Chase Venture
        Capital Associates, L.L.C.)
        13-337-6808
        ------------------------------------------------------------------------
--------------------------------------------------------------------------------
   2.   Check the Appropriate Box if a Member of a Group (See Instructions)
        (a)
            --------------------------------------------------------------------
        (b)
            --------------------------------------------------------------------
--------------------------------------------------------------------------------
   3.   SEC Use Only
                     -----------------------------------------------------------
--------------------------------------------------------------------------------
   4.   Citizenship or Place of Organization   Delaware
                                               ---------------------------------
--------------------------------------------------------------------------------
                           5.   Sole Voting Power  6,866,643
                                                   -----------------------------
                        --------------------------------------------------------
                           6.   Shared Voting Power  Not applicable.
  Number of Shares                                   ---------------------------
  Beneficially          --------------------------------------------------------
  Owned by Each            7.   Sole Dispositive Power  6,866,643
  Reporting Person                                      ------------------------
  With:                 --------------------------------------------------------
                           8.   Shared Dispositive Power  Not applicable.
                                                          ----------------------
                        --------------------------------------------------------
--------------------------------------------------------------------------------
   9.   Aggregate Amount Beneficially Owned by Each Reporting Person   6,866,643
                                                                       ---------
--------------------------------------------------------------------------------
  10.   Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
        Instructions)
                      ----------------------------------------------------------
--------------------------------------------------------------------------------
  11.   Percent of Class Represented by Amount in Row (9)  22.9%
                                                           ---------------------
--------------------------------------------------------------------------------
  12.   Type of Reporting Person (See Instructions)
--------------------------------------------------------------------------------
  CO
--------------------------------------------------------------------------------

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

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

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

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

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

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



SEC 1745 (3-98)




                                  SCHEDULE 13G


ISSUER: Encore Acquisition Company                          CUSIP NO.: 29255W100

PRELIMINARY NOTE This amendment is being filed to reflect a change in the
controlling persons of the Reporting Person.

ITEM 1.

          (a)  NAME OF ISSUER:

               Encore Acquisition Company

          (b)  ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

               777 Main Street
               Suite 1400
               Fort Worth, Texas  76102

ITEM 2.

          (a)  NAME OF PERSON FILING:

               J.P. Morgan Partners (SBIC), LLC

               Supplemental information relating to the ownership and control of
               the person filing this statement is included in Exhibit 2(a)
               attached hereto.

          (b)  ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE:

               1221 Avenue of the Americas
               New York, New York  10020

          (c)  CITIZENSHIP:

               Delaware

          (d)  TITLE OF CLASS OF SECURITIES (OF ISSUER):

               Common Stock

          (e)  CUSIP NUMBER:

               29255W100

ITEM 3.  IF THIS STATEMENT IS FILED PURSUANT TO SS. SS. 240. 13d-1(b) OR 240.
         13d-2(b) OR (c), CHECK WHETHER THE PERSON FILING IS A:

          Not  applicable.

ITEM 4.  OWNERSHIP

          (a)  AMOUNT BENEFICIALLY OWNED:

               6,866,643 (as of December 31, 2002)

          (b)  PERCENT OF CLASS:

               22.9% (as of December 31, 2002)




SEC 1745 (3-98)




                                  SCHEDULE 13G


ISSUER: Encore Acquisition Company                          CUSIP NO.: 29255W100


          (C)  NUMBER OF SHARES AS TO WHICH SUCH PERSON HAS:

               (i)    6,866,643
               (ii)   Not applicable.
               (iii)  6,866,643
               (iv)   Not applicable.


ITEM 5.  OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS

               Not applicable.

ITEM 6.  OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON

               Not applicable.

ITEM 7.  IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE
         SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY

               Not applicable.

ITEM 8.  IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP

               Not applicable.

ITEM 9.  NOTICE OF DISSOLUTION OF GROUP

               Not applicable.

ITEM 10. CERTIFICATION

               Not applicable











SEC 1745 (3-98)




                                  SCHEDULE 13G


ISSUER: Encore Acquisition Company                          CUSIP NO.: 29255W100



                                    SIGNATURE


            After reasonable inquiry and to the best of my knowledge and belief,
I certify that the information set forth in this statement is true, complete and
correct.

Date:  February 13, 2003
                                          J.P. MORGAN PARTNERS (SBIC), LLC


                                          By: /s/ Jeffrey C. Walker
                                              ------------------------------
                                              Name:   Jeffrey C. Walker
                                              Title:  President











SEC 1745 (3-98)