HARCOR ENERGY INC
SC 13G/A, 1998-06-10
CRUDE PETROLEUM & NATURAL GAS
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                          SECURITIES AND EXCHANGE COMMISSION
                               Washington, D.C.  20549


                                     SCHEDULE 13G


               INFORMATION STATEMENT PURSUANT TO RULES 13d-1 AND 13d-2 
                    UNDER THE SECURITIES AND EXCHANGE ACT OF 1934
                                (Amendment No. 4 )(*)


                                 Harcor Energy, Inc.
- ------------------------------------------------------------------------------
                                   (Name of Issuer)


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


                                      411628209
- ------------------------------------------------------------------------------
                                    (CUSIP Number)





- -------------------
* 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
disclosures provided in a prior cover page.

The information required on 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).

                      (Continued on following page(s))
                            Page 1 of 8 Pages
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- ----------------------                         -------------------------------
CUSIP No. 411628209           13G                 Page 2 of 8 Pages
- ----------------------                         -------------------------------
- ------------------------------------------------------------------------------
   1    NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                  The TCW Group, Inc. 
- ------------------------------------------------------------------------------
   2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a) / /
                                                                        (b) /X/
- ------------------------------------------------------------------------------
   3    SEC USE ONLY

- ------------------------------------------------------------------------------
   4    CITIZENSHIP OR PLACE OF ORGANIZATION

             Nevada corporation 
- ------------------------------------------------------------------------------
      NUMBER OF        5       SOLE VOTING POWER
        SHARES                                                         33,000
     BENEFICIALLY    ---------------------------------------------------------
       OWNED BY        6       SHARED VOTING POWER
         EACH                                                             -0-
      REPORTING      ---------------------------------------------------------
        PERSON         7       SOLE DISPOSITIVE POWER
         WITH                                                          33,000
                     ---------------------------------------------------------
                       8       SHARED DISPOSITIVE POWER
                                                                          -0-
- ------------------------------------------------------------------------------
   9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                       33,000
- ------------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
                                                                          / /
- ------------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
         0.2%(see response to Item 4)
- ------------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON*
                                        HC/CO  
- ------------------------------------------------------------------------------

                        *SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>

- ----------------------                         -------------------------------
CUSIP No. 411628209           13G                 Page 3 of 8 Pages
- ----------------------                         -------------------------------
- ------------------------------------------------------------------------------
   1    NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

             Robert Day
- ------------------------------------------------------------------------------
   2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                      (a) / /
                                                                      (b) /X/
- ------------------------------------------------------------------------------
   3    SEC USE ONLY

- ------------------------------------------------------------------------------
   4    CITIZENSHIP OR PLACE OF ORGANIZATION

             United States Citizen
- ------------------------------------------------------------------------------
      NUMBER OF        5       SOLE VOTING POWER
        SHARES                                                         33,000
     BENEFICIALLY    ---------------------------------------------------------
       OWNED BY        6       SHARED VOTING POWER
         EACH                                                             -0-
      REPORTING      ---------------------------------------------------------
        PERSON         7       SOLE DISPOSITIVE POWER
         WITH                                                          33,000
                     ---------------------------------------------------------
                       8       SHARED DISPOSITIVE POWER
                                                                          -0-
- ------------------------------------------------------------------------------
   9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                       33,000
- ------------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
                                                                          / /
- ------------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
          0.2% (see response to Item 4)
- ------------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON*7
                                         HC/IN
- ------------------------------------------------------------------------------

                        *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>
                                                     Page 4 of 8 Pages

Item 1(a).     Name of Issuer:

               Harcor Energy, Inc.

Item 1(b).     Address of Issuer's Principal Executive Offices:

               4400 Post Oak Parkway
               Suite 2220
               Houston, TX 77027-3413
               
Item 2(a).     Name of Persons Filing:
Item 2(b).     Address of Principal Business Office:
Item 2(c).     Citizenship:

               The TCW Group, Inc.
               865 South Figueroa Street
               Los Angeles, CA 90017
               (Nevada Corporation)

               Robert Day 
               200 Park Avenue, Suite 2200
               New York, New York 10166
               (United States Citizen)

Item 2(d).     Title of Class of Securities:

               Common Stock

Item 2(e).     CUSIP Number:

               411628209

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                                                     Page 5 of 8 Pages

Item 3.        If this statement is filed pursuant to Rules 13d-1(b), or
               13d-2(b), check whether the person filing is a:

     (a)       [ ]  Broker or Dealer registered under Section 15 of the Act:

                         Not applicable

     (b)       [ ]  Bank as defined in Section 3(a)(6) of the Act:

                         Not applicable

     (c)       [ ]  Insurance Company as defined in Section 3(a)(19) of the Act:
                    
                         Not applicable

     (d)       [ ]  Investment Company registered under Section 8 of the
                    Investment Company Act:

                         Not applicable

     (e)       [ ]  Investment Adviser registered under Section 203 of the
                    Investment Advisers Act of 1940:

                         Not applicable

     (f)       [ ]  Employee Benefit Plan, Pension Fund which is subject to the
                    provisions of the Employee Retirement Income Security Act of
                    1974 or Endowment Fund (SEE 13d-1(b)(1)(ii)(F)):

                         Not applicable

     (g)       [X]  Parent Holding Company, in accordance with Rule
                    13d-1(b)(ii)(G) (SEE Item 7):

                         The TCW Group, Inc.
                         Robert Day (individual who may be deemed to control The
                              TCW Group, Inc. and other holders of the Common
                              Stock of the issuer)

     (h)       [ ]  Group, in accordance with Rule 13d-1(b)(1)(ii)(H):

                         Not applicable.

<PAGE>
                                                     Page 6 of 8 Pages

Item 4.        Ownership **
     THE TCW GROUP, INC.

               (a)  Amount beneficially owned: 33,000 ***

               (b)  Percent of class: 0.2%

               (c)  Number of shares as to which such person has:

                    (i)   Sole power to vote or to direct the vote:     33,000

                    (ii)  Shared power to vote or to direct the vote:   none.

                    (iii) Sole power to dispose or direct the disposition of:
                    33,000

                    (iv)  Shared power to dispose or to direct the disposition
                    of:  none.

     ROBERT DAY ****

               (a)  Amount beneficially owned: 33,000 ***

               (b)  Percent of class: 0.2%

               (c)  Number of shares as to which such person has:

                    (i)   Sole power to vote or to direct the vote:    33,000

                    (ii)  Shared power to vote or to direct the vote: none.

                    (iii) Sole power to dispose or direct the disposition of:
                    33,000

                    (iv)  Shared power to dispose or to direct the disposition
                    of:  none.


**  The filing of this Schedule 13G shall not be construed as an admission
that the reporting person or any of its affiliates is, for the purposes of
Section 13(d) or 13(g) of the Securities Exchange Act of 1934, the beneficial
owner of any securities covered by this Schedule 13G.  In addition, the filing
of this Schedule 13G shall not be construed as an admission that the reporting
person or any of its affiliates is the beneficial owner of any securities
covered by this Schedule 13G for any other purposes than Section 13(d) of the
Securities Exchange Act of 1934.

***  Represents 33,000 shares of Common Stock issuable upon conversion of
33,000 Warrants expiring 07/15/02.

****  Shares reported for Robert Day include shares reported for The TCW
Group, Inc.

<PAGE>
                                                     Page 7 of 8 Pages

Item 5.        Ownership of Five Percent or Less of a Class.

               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.

               SEE Exhibit A.

Item 8.        Identification and Classification of Members of the Group.

               Not applicable. SEE Exhibits A and B.

Item 9.        Notice of Dissolution of Group.

               Not applicable.

Item 10.       Certification.

     Because this statement is filed pursuant to Rule 13d-1(b), the following
     certification is included:

     By signing below I certify that, to the best of my knowledge and belief,
     the securities referred to above were acquired in the ordinary course of
     business and were not acquired for the purpose of and do not have the
     effect of changing or influencing the control of the issuer of such
     securities and were not acquired in connection with or as a participant in
     any transaction having such purpose or effect.

<PAGE>
                                                     Page 8 of 8 Pages

                                      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.

Dated this 9th day of June, 1998.


                              The TCW Group, Inc.

                                             
                              By:  /s/ Mohan V. Phansalkar
                                   -------------------------------
                                   Mohan V. Phansalkar
                                   Authorized Signatory


                              Robert Day

                                             
                              By: /s/ Mohan V. Phansalkar
                                   -------------------------------
                                   Mohan V. Phansalkar
                                   Under Power of Attorney dated January 30,
                                   1996, on File with Schedule 13G Amendment
                                   Number 1 for Matrix Service Co. dated 
                                   January 30, 1996.



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                                      EXHIBIT A


                   RELEVANT SUBSIDIARIES OF PARENT HOLDING COMPANY

PART A: TCW ENTITIES

PARENT HOLDING COMPANY:

          The TCW Group, Inc.

          Robert Day (an individual who may be deemed to control The TCW Group,
          Inc.)


RELEVANT SUBSIDIARIES THAT ARE PERSONS DESCRIBED IN RULE 13d-1(b):

     (i)  TCW Asset Management Company, a California corporation and an
     Investment Adviser registered under Section 203 of the Investment Advisers
     Act of 1940. 

Note:          No Common Stock of Harcor Energy, Inc. is held directly by The
               TCW Group, Inc.  Other than the indirect holdings of The TCW
               Group, Inc. no Common Stock of Harcor Energy, Inc. is held
               directly or indirectly by Robert Day, an individual who may be
               deemed to control The TCW Group, Inc. 
     
PART B: NON TCW ENTITIES

PARENT HOLDING COMPANY:

          Robert Day (an individual who may be deemed to control the holders
          described below which are not subsidiaries of The TCW Group, Inc.)

RELEVANT SUBSIDIARIES THAT ARE PERSONS DESCRIBED IN RULE 13d-1(b):

          Oakmont Corporation, a California corporation and an Investment
          Adviser registered under Section 203 of the Investment Advisers Act of
          1940.

          Sequoia Partners, LLC, a California limited liability corporation and
          an Investment Adviser registered under Section 203 of the Investment
          Advisers Act of 1940.

                                     A-1


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                                     EXHIBIT B

                                JOINT FILING AGREEMENT


          The undersigned acknowledge and agree that the foregoing statement on
Schedule 13G is filed on behalf of each of the undersigned and that all
subsequent amendments to this statement on Schedule 13G shall be filed on behalf
of each of the undersigned without the necessity of filing additional joint
acquisition statements.  The undersigned acknowledge that each shall be
responsible for the timely filing of such amendments, and for the completeness
and accuracy of the information concerning him or it contained therein, but
shall not be responsible for the completeness and accuracy of the information
concerning the other, except to the extent that he or it knows or has reason to
believe that such information is accurate.


Dated: June 9, 1998


                              The TCW Group, Inc.

                                             
                              By:  /s/ Mohan V. Phansalkar
                                   ----------------------------
                                   Mohan V. Phansalkar
                                   Authorized Signatory


                              Robert Day

                                             
                              By:  /s/ Mohan V. Phansalkar
                                   ----------------------------
                                   Mohan V. Phansalkar
                                   Under Power of Attorney dated January 30,
                                   1996, on File with Schedule 13G Amendment
                                   Number 1 for Matrix Service Co. dated 
                                   January 30, 1996.


                                        B-1


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