1993
                                 ------
                    SECURITIES AND EXCHANGE COMMISSION
                         WASHINGTON, D. C.  20549
                                     
                           
                             FORM 10-K/A     
                           
                          (Amendment No. 2)     
                                     
      [X] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
          SECURITIES EXCHANGE ACT OF 1934
          For the fiscal year ended December 31, 1993
                                    or
          TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
          SECURITIES EXCHANGE ACT OF 1934
          For the transition period from _____________ to _______________.

                       Commission file number 1-8483
                            UNOCAL CORPORATION
          (Exact name of registrant as specified in its charter)

              DELAWARE                               95-3825062
      -------------------------------            ------------------ 
      (State or other jurisdiction of             (I.R.S. Employer
      incorporation or organization)               Identification No.)

 1201 West 5th Street, Los Angeles, California       90017
 ---------------------------------------------      --------
   (Address of Principal Executive Offices)         (Zip Code)

    Registrant's Telephone Number, Including Area Code:  (213) 977-7600
                                     
      Securities Registered Pursuant to Section 12(b) of the Act:

      Title of each class         Name of each exchange on which registered
Common Stock, par value $1.00 per share  New York Stock Exchange
                                         Chicago Stock Exchange
                                         Pacific Stock Exchange
    Preferred Stock Purchase Rights      New York Stock Exchange
                                         Chicago Stock Exchange
                                         Pacific Stock Exchange

     Securities Registered Pursuant to Section 12(g) of the Act:  None

     Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act
of 1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to
such filing requirements for the past 90 days.   Yes [X]      No

     Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained,
to the best of registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K.  [X]

     The aggregate market value of Common Stock held by non-affiliates of the
registrant as of March 15, 1994 (based upon the average of the high and low
prices of these shares on the New York Stock Exchange Composite
Transactions listing) was $6,576 million.

   Shares of Common Stock outstanding as of March 15, 1994: 241,841,427

                    DOCUMENTS INCORPORATED BY REFERENCE
   Portions of 1994 Proxy Statement                 Part III
                                  
                                  
                                  


                                 PART III

   The  information  required by Items 10  through  12  (except  for
information   regarding   the  company's  executive   officers)   is
incorporated by reference from Unocal's Proxy Statement for the 1994
Annual  Meeting  of  Stockholders (File No.  1-8483),  as  indicated
below.
   
   
. . .

ITEM 10 - DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

   
   Information  regarding the Directors of the  Registrant  and  the
   Executive  Officers of the Registrant can be  found  on  pages  3
   through 5 of the 1994 Proxy Statement and page 18 of this  Annual
   Report on Form 10-K, respectively. 
    





                                  1

          
          


                         SIGNATURE
          
          
Pursuant to the requirement of the Securities Exchange Act of 1934, the
registrant has duly caused this report to amendment to report to be signed
on its behalf by the undersigned, thereunto duly authorized.




                                      UNOCAL CORPORATION
                                      -------------------
                                        (Registrant)







                                 by:  /s/CHARLES S. MCDOWELL
                                         --------------------
                                         (Charles S. McDowell,
                                          Vice President and Comptroller)








Dated:  June 28, 1994
- - ---------------------







                                  2

                         



                         
                         UNOCAL CORPORATION
                                  
                            EXHIBIT INDEX
                                  
         
Exhibit 3.1/*/   Certificate  of  Incorporation  of  Unocal,  as  amended 
                 through July 24, 1992. 
    
     
Exhibit 3.2      Bylaws of Unocal (incorporated by reference to Exhibit 3
                 to  Unocal's  Quarterly Report  on  Form  10-Q  for  the
                 quarter   ended  March  31,  1992,  File   No.   1-8483.
                 Amendments to bylaws to be effective on and after  April
                 25,  1994  are  incorporated by  reference  to  Unocal's
                 Current  Report on Form 8-K, dated March 2,  1994,  File
                 No. 1-8483).
         
Exhibit 4        Instruments  Defining  the Rights of  Security  Holders,
                 Including Indentures.
         
Exhibit 10.1     Rights  Agreement, dated as of January 29, 1990, between
                 the registrant and Chemical Trust Company of California,
                 as  successor Rights Agent (incorporated by reference to
                 Exhibit  1 to Unocal's Current Report on Form 8-K  dated
                 January 29, 1990, File No. 1-8483).

    The following Exhibits 10.2 through 10.8 are compensatory plans or
    agreements required to be filed by Item 601 (b) (10) (iii) (A) of
    Regulation S-K.
          
Exhibit 10.2    The   Management  Incentive  Program  (incorporated   by
                reference to Unocal's Registration Statement on Form  S-8,
                File No. 33-43231, filed October 8, 1991).
          
Exhibit 10.3    The  Long-Term  Incentive Plan of 1985 (incorporated  by
                reference to Unocal's Registration Statement on Form  S-8,
                File No. 2-93452, filed September 28, 1984).
          
Exhibit 10.4    Supplemental   Retirement  Plan   for   Key   Management
                Personnel,  as  amended and effective  January  1,  1989
                (incorporated by reference to Exhibit 10.3  to  Unocal's
                Annual  Report on Form 10-K for the year ended  December
                31, 1990, File No. 1-8483).
          
Exhibit 10.5    Other   Compensatory   Arrangements   (incorporated   by
                reference  to Exhibit 10.4 to Unocal's Annual Report  on
                Form 10-K for the year ended December 31, 1990, File No.
                1-8483).
          
Exhibit 10.6    Directors'  Restricted Stock Plan of 1991  (incorporated
                by  reference  to Exhibit B to Unocal's Proxy  Statement
                for its 1991 Annual Meeting of Stockholders, File No. 1-
                8483).
          
Exhibit 10.7    Form of Indemnity  Agreement between  Unocal and each of
                its directors (incorporated by reference to Exhibit A to
                Unocal's  Proxy Statement for its 1987 Annual Meeting of
                Stockholders, File No. 1-8483).
          
Exhibit 10.8    Consulting Agreement, dated April 26, 1993, between
                Union Oil Company of California, dba Unocal, and Claude
                S. Brinegar.
          
Exhibit 11      Computation of Earnings Per Common Share

          
Exhibit 12      Computation of Ratio of Earnings to Fixed Charges

          
Exhibit 21      Subsidiaries of Unocal Corporation

          
Exhibit 23      Consent of Coopers & Lybrand

   
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* Filed with this amendment.