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


                                    FORM 10-Q

        (Mark One)

 [X]  QUARTERLY  REPORT  PURSUANT  TO SECTION 13 OR 15(D) OF THE  SECURITIES
      EXCHANGE ACT OF 1934 For the quarterly  period ended September 30, 1997

                                       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.)


         2141 ROSECRANS AVENUE, SUITE 4000, EL SEGUNDO, CALIFORNIA 90245        
                    (Address of principal executive offices)
                                   (Zip Code)

                                 (310) 726-7600                                 
              (Registrant's Telephone Number, Including Area Code)


     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

Number of shares of Common  Stock, $1 par value,  outstanding  as of October 31,
1997: 246,527,276





                         PART I - FINANCIAL INFORMATION
Item 1.  Financial Statements

CONSOLIDATED EARNINGS                                                                                          UNOCAL CORPORATION
(Unaudited)
                                                                                     For the Three Months     For the Nine Months
                                                                                      Ended September 30       Ended September 30
                                                                                    ---------------------------------------------
Dollars in millions except per share amounts                                            1997        1996        1997        1996
- ---------------------------------------------------------------------------------------------------------------------------------
Revenues
                                                                                                             
Sales and operating revenues ....................................................   $   1,370    $  1,265   $   4,272    $  3,668
Gain on sales of assets and other revenues ......................................          27          72         235         275
- ---------------------------------------------------------------------------------------------------------------------------------
      Total revenues ............................................................       1,397       1,337       4,507       3,943
Costs and Other Deductions
Crude oil and product purchases .................................................         524         421       1,616       1,096
Operating expense ...............................................................         423         325       1,076         960
Selling, administrative and general expense .....................................          26          36          81         104
Depreciation, depletion and amortization ........................................         300         192         755         617
Dry hole costs ..................................................................           8          53          51          72
Exploration expense .............................................................          50          33         114          83
Interest expense ................................................................          37          67         147         215
Property and other operating taxes ..............................................          18          16          54          57
Distributions on convertible preferred
   securities of subsidiary trust ...............................................           8           2          24           2
- ---------------------------------------------------------------------------------------------------------------------------------
      Total costs and other deductions ..........................................       1,394       1,145       3,918       3,206
- ---------------------------------------------------------------------------------------------------------------------------------
Earnings from continuing operations
   before income taxes ..........................................................           3         192         589         737
Income taxes (benefit) ..........................................................        (174)         58          68         284
- ---------------------------------------------------------------------------------------------------------------------------------
Earnings from continuing operations before  discontinued
   operations and extraordinary item ............................................   $     177    $    134   $     521    $    453
Discontinued operations
   Earnings from operations (net of tax of $22 million and $48 million, respectively)      --          37          --          80
   Loss on disposal (net of tax benefit of $27 million) .........................          --          --         (44)         --
- ---------------------------------------------------------------------------------------------------------------------------------
      Earnings (loss) from discontinued operations ..............................          --          37         (44)         80
                                                                                    ---------------------------------------------
Extraordinary item
  Early extinguishment of debt (net of tax benefit of $14 million) ..............          --          --         (38)         --
- ---------------------------------------------------------------------------------------------------------------------------------
Net Earnings ....................................................................   $     177    $    171   $     439    $    533
Dividends on preferred stock ....................................................          --          --          --          18
Non-cash charge related to exchange of preferred stock ..........................          --          54          --          54
- ---------------------------------------------------------------------------------------------------------------------------------
      Net earnings applicable to common stock ...................................   $     177    $    117   $     439    $    461
                                                                                    =============================================
Earnings (loss) per share of common stock assuming no dilution (a)
   Continuing operations ........................................................   $    0.71    $   0.32   $    2.09    $   1.54
   Discontinued operations ......................................................          --        0.15       (0.18)       0.32
   Extraordinary item ...........................................................          --          --       (0.15)         --
                                                                                    ---------------------------------------------
      Net earnings per common share assuming no dilution ........................   $    0.71    $   0.47   $    1.76    $   1.86
Earnings (loss) per share of common stock assuming full dilution  (b)
   Continuing operations ........................................................   $    0.70    $   0.31   $    2.04    $   1.52
   Discontinued operations ......................................................          --        0.14       (0.17)       0.31
   Extraordinary item ...........................................................          --          --       (0.14)         --
                                                                                    ---------------------------------------------
      Net earnings per common share assuming full dilution ......................   $    0.70    $   0.45   $    1.73    $   1.83
Cash dividends declared per share of common stock ...............................   $    0.20    $   0.20   $    0.60    $   0.60
- ---------------------------------------------------------------------------------------------------------------------------------
(a)  Weighted average shares outstanding assuming no dilution (in thousands) ....     247,367     248,668     249,153     248,211
(b)  Weighted average shares outstanding assuming full dilution (in thousands) ..     262,073     263,525     263,757     262,823

               See notes to the consolidated financial statements




                                       1





CONSOLIDATED BALANCE SHEET                                                UNOCAL CORPORATION


                                                                   September 30  December 31
                                                                   -------------------------
Millions of dollars                                                    1997 (a)         1996
- --------------------------------------------------------------------------------------------
Assets
Current assets
                                                                             
   Cash and cash equivalents                                          $     516    $     217
   Accounts and notes receivable                                            813        1,027
   Net assets of discontinued operations                                     --        1,774
   Inventories                                                              154          125
   Deferred income taxes                                                     54           57
   Other current assets                                                      24           28
- --------------------------------------------------------------------------------------------
      Total current assets                                                1,561        3,228
Investments and long-term receivables                                     1,081        1,206
Properties (b)                                                            4,688        4,590
Deferred income taxes                                                        19           21
Other assets                                                                108           78
- --------------------------------------------------------------------------------------------
      Total assets                                                    $   7,457    $   9,123
- --------------------------------------------------------------------------------------------
Liabilities and Stockholders' Equity
Current liabilities
   Accounts payable                                                   $     664    $   1,012
   Taxes payable                                                            123          231
   Current portion of long-term debt and capital lease obligations           --          118
   Interest payable                                                          32           70
   Current portion of environmental liabilities                              73           73
   Other current liabilities                                                 83          118
- --------------------------------------------------------------------------------------------
      Total current liabilities                                             975        1,622
Long-term debt                                                            2,078        2,940
Deferred income taxes                                                       166          348
Accrued abandonment, restoration and environmental liabilities              704          677
Other deferred credits and liabilities                                      607          739
Company-obligated mandatorily redeemable convertible
   preferred securities of a subsidiary trust holding solely 6-1/4%
   convertible junior subordinated debentures of Unocal                     522          522
Common stock ($1 par value)                                                 252          251
Capital in excess of par value                                              444          412
Foreign currency translation adjustment                                     (13)         (13)
Unearned portion of restricted stock issued                                 (34)         (14)
Retained earnings                                                         1,929        1,639
Treasury stock - at cost  (c)                                              (173)          --
- --------------------------------------------------------------------------------------------
      Total stockholders' equity                                          2,405        2,275
- --------------------------------------------------------------------------------------------
         Total liabilities and stockholders' equity                   $   7,457    $   9,123
- --------------------------------------------------------------------------------------------
(a)  Unaudited
(b)  Net of accumulated depreciation and other of:                    $   9,863    $   9,502
(c)  Number of shares (in thousands):                                     4,485           --

               See notes to the consolidated financial statements




                                       2






CONSOLIDATED CASH FLOWS                                                 UNOCAL CORPORATION
(Unaudited)

                                                                      For the Nine Months
                                                                       Ended September 30
                                                                    ----------------------
Millions of dollars                                                      1997         1996
- ------------------------------------------------------------------------------------------
Cash Flows from Operating Activities
                                                                           
Net earnings                                                        $     439    $     533
Adjustments to reconcile net earnings to
   net cash provided by operating activities
      Loss on disposal of discontinued operations (before-tax              71           --
      Depreciation, depletion and amortization                            755          724
      Dry hole costs                                                       51           72
      Deferred income taxes                                              (226)          48
      Gain on sales of assets (before-tax)                                (59)        (173)
      Other                                                               (83)          96
      Working capital and other changes related to operations
         Accounts and notes receivable                                    221          (23)
         Inventories                                                      (41)           4
         Accounts payable                                                (351)          69
         Taxes payable                                                   (110)          49
         Other                                                             69         (200)
- ------------------------------------------------------------------------------------------
            Net cash provided by operating activities                     736        1,199

Cash Flows from Investing Activities
   Capital expenditures (includes dry hole costs)                        (953)        (940)
   Proceeds from sale of discontinued operations                        1,789           --
   Proceeds from sales of assets                                           55          585
- ------------------------------------------------------------------------------------------
            Net cash provided by (used in) investing activiti             891         (355)

Cash Flows from Financing Activities
   Long-term borrowings                                                   370          130
   Reduction of long-term debt and capital lease obligations           (1,329)        (690)
   Dividends paid on preferred stock                                       --          (27)
   Dividends paid on common stock                                        (150)        (149)
   Repurchases of common stock                                           (173)          --
   Other                                                                  (46)          23
- ------------------------------------------------------------------------------------------
         Net cash used in financing activities                         (1,328)        (713)

Increase in cash and cash equivalents                                     299          131
Cash and cash equivalents at beginning of year                            217           94
- ------------------------------------------------------------------------------------------
Cash and cash equivalents at end of period                          $     516    $     225
- ------------------------------------------------------------------------------------------

Supplemental  disclosure of cash flow  information:
  Cash paid during the period for:
      Interest (net of amount capitalized)                          $     178    $     243
      Income taxes (net of refunds)                                 $     265    $     239


                  See notes to consolidatefinancial statements.




                                       3



                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                   (Unaudited)


(1)  The consolidated financial statements included herein are unaudited and, in
     the opinion of  management,  include all  adjustments  necessary for a fair
     presentation  of  financial   position  and  results  of  operations.   All
     adjustments are of a normal recurring nature. Such financial statements are
     presented in  accordance  with the  Securities  and  Exchange  Commission's
     (Commission) disclosure requirements for Form 10-Q.

     These  interim   consolidated   financial  statements  should  be  read  in
     conjunction  with  the  consolidated  financial  statements  and the  notes
     thereto  filed with the  Commission  in Unocal  Corporation's  1996  Annual
     Report on Form 10-K (as amended).

     Results for the nine months ended  September 30, 1997, are not  necessarily
     indicative of future financial results.

     Certain items in the prior year financial statements have been reclassified
     to conform to the 1997 presentation.

(2)  For the purpose of this report,  Unocal  Corporation  and its  consolidated
     subsidiary,  Union Oil Company of California (Union Oil), together with the
     consolidated subsidiaries of Union Oil, are referred to as "Unocal" or "the
     company".

(3)  Discontinued Operations

     On March 31, 1997, the company sold its West Coast refining,  marketing and
     transportation  assets to Tosco  Corporation  (Tosco).  In addition to cash
     proceeds of $1.4 billion,  the company received  14,092,482 shares of Tosco
     common  stock valued at $397  million.  The value of the stock was based on
     the  average of the high and low market  prices of the Tosco  stock for the
     last 10 trading  days prior to the sale.  On May 8, 1997,  the company sold
     the stock back to Tosco for $394 million (net of expenses).

     During the first nine months of 1997,  the company  recorded an  additional
     loss on  disposal of $44 million  (net of a $27 million tax  benefit).  The
     additional  provision was primarily due to adjustments in closing inventory
     amounts and higher than anticipated  termination costs. Included in the $44
     million  amount is a favorable  adjustment of $6 million (net of $4 million
     tax) related to a lower than expected first quarter operating loss.

     The consolidated  earnings statement reflects the results for the refining,
     marketing and transportation  operations as discontinued operations for the
     quarters and nine months ended September 30, 1997 and 1996. At December 31,
     1996, the assets had been  reclassified in the  consolidated  balance sheet
     from their  historical  classifications  to separately  reflect them as net
     assets of  discontinued  operations.  Cash flows  related  to  discontinued
     operations have not been segregated in the  consolidated  statement of cash
     flows  for  the  1996  and  1997  periods.  Consequently,  amounts  on  the
     consolidated  earnings statement may not agree with certain captions on the
     consolidated statement of cash flows for the 1996 and 1997 periods.

(4)  Extraordinary Item

     In May 1997, the company purchased  approximately $507 million in aggregate
     principal amount of three of its outstanding issues of debt securities. The
     debt  securities  consisted of $161 million in debentures  with an interest
     rate of 9-1/4  percent  and $346  million in notes with  interest  rates of
     8-3/4 percent and 9-3/4 percent.  The debt securities were purchased for an
     aggregate   price  of  $555  million,   including  a  pre-tax   premium  of
     approximately $48 million over their aggregate carrying value. The premium,
     together with related costs,  was recorded as a  extraordinary  item on the
     company's consolidated statement of earnings.

(5)  Other Financial Information

     Sales and operating revenues are principally derived from the sale of crude
     oil, natural gas, natural gas liquids, geothermal steam, specialty minerals
     and nitrogen-based agricultural products produced by the company. Sales and
     operating revenues also include amounts received from the sale of purchased
     crude oil, natural gas and products.  During the third quarters of 1997 and
     1996, approximately 29 percent and 30 percent, respectively, of total sales
     and  operating  revenues were  attributed to sales of purchased  crude oil,
     natural gas and products. For the first nine months of 1997 and 1996,



                                       4




                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                   (Unaudited)


     approximately 28 percent and 29 percent,  respectively,  of total sales and
     operating revenues were attributed to sales of purchased crude oil, natural
     gas and products. Earnings attributable to the sale of purchased crude oil,
     natural gas and products were  immaterial  for the third quarters and first
     nine months of 1997 and 1996.  Related  purchase  costs are  classified  as
     expense in the crude oil and product purchases category of the consolidated
     earnings statement.

     Capitalized  interest  totaled  $10  million  and $3 million  for the third
     quarters of 1997 and 1996, respectively.  For the first nine months of 1997
     and  1996,   capitalized   interest   was  $26   million  and  $9  million,
     respectively.

(6)  Income Taxes:

The  components of earnings  from  continuing  operations  and the provision for
income taxes were as follows:




                                                                                For Three Months               For the Nine Months
                                                                               Ended September 30               Ended September 30
                                                                            --------------------------------------------------------
Millions of Dollars                                                          1997            1996             1997             1996
- ------------------------------------------------------------------------------------------------------------------------------------
Earnings (loss)  from continuing operations
   before income taxes
                                                                                                                     
       United States (a) ........................................           $(116)           $  28            $ 204            $ 310
       Foreign ..................................................             119              164              385              427
                                                                            --------------------------------------------------------
             Total ..............................................               3              192              589              737
Income Taxes
   Current
      Federal ...................................................               2              (22)              76               65
      State .....................................................               2               (1)              13                1
      Foreign ...................................................              77               70              243              182
                                                                            --------------------------------------------------------
             Total ..............................................              81               47              332              248
 Deferred
      Federal ...................................................            (167)               3             (178)               2
      State .....................................................              (7)               7               (5)              18
      Foreign ...................................................             (81)               1              (81)              16
                                                                            --------------------------------------------------------
             Total ..............................................            (255)              11             (264)              36
                                                                            --------------------------------------------------------
               Total income taxes (benefit) .....................           $(174)           $  58            $  68            $ 284
                                                                            --------------------------------------------------------

 <FN>
(a) Includes corporate and unallocated expenses.
</FN>

   

                                       5



             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
                                   (Unaudited)
      


The  following is a  reconciliation  of income taxes  calculated  at the federal
statutory  income  tax  rate  to  income  taxes   (benefits)   reported  in  the
consolidated earnings statement:



                                                                                        For Three Months        For the Nine Months
                                                                                       Ended September 30        Ended September 30
                                                                                     -----------------------------------------------
Millions of Dollars                                                                  1997           1996         1997          1996
- ------------------------------------------------------------------------------------------------------------------------------------
Federal statutory rate:                                                                35%           35%          35%            35%

Earnings from continuing operations
                                                                                                                    
   before income taxes .....................................................        $   3         $ 192         $ 589         $ 737
Tax at federal statutory rate ..............................................            1            67           206           258
Foreign taxes in excess of (less than) statutory rate (b) ..................          (53)           (5)           (8)           36
Dividend exclusion .........................................................           (3)           (3)          (10)          (11)
U.S. deferred tax adjustment ...............................................         (114)           --          (114)           --
Other ......................................................................           (5)           (1)           (6)            1
                                                                                    
             Total .........................................................        $(174)        $  58         $  68         $ 284
                                                                                    ------------------------------------------------
<FN>
(b)   The third quarter and first nine months of 1997 included a $68 million reduction in deferred taxes for Thailand.
</FN>




 (7) Inventories


                                                                                                 September 30           December  31
                                                                               -----------------------------------------------------
Millions of dollars                                                                                    1997                     1996
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                           
Crude oil and other petroleum products .............................................                    $ 28                    $ 12
Agricultural products ..............................................................                      33                      31
Carbon and Minerals ................................................................                      54                      31
Materials, supplies and other ......................................................                      39                      51
- ------------------------------------------------------------------------------------------------------------------------------------
       Total .......................................................................                    $154                    $125
- ------------------------------------------------------------------------------------------------------------------------------------


(8)  Long Term Debt and Credit Agreements:

     Third  quarter  1997  financing  activities  primarily  consisted  of:  the
     borrowing of an  additional  $10 million  under the $250  million  Thailand
     revolving  credit  facility,  increasing  the  outstanding  balance to $160
     million,  and a payment of $250  million on the $1.2  billion  Bank  Credit
     Agreement,  reducing  the balance to zero.  On October 10, 1997 the company
     signed a new Bank Credit Agreement providing a revolving credit facility of
     $1 billion  through  October  2002,  at  interest  rates based on LIBOR and
     requiring a facility  fee on undrawn  commitments.  The $1.2  billion  Bank
     Credit  Agreement  available on September 30, 1997,  which had availability
     through June 2000, and the $200 million 364-day credit facility established
     in 1995, which had a March 1998 maturity, were both canceled on October 10,
     1997.

(9)  Financial Instruments

     The fair values of the  company's  financial  instruments  at September 30,
     1997 are described below:

     The Deutsche  Mark currency  swap  agreement  had a notional  value of $110
     million  and a fair  value of  approximately  $32  million  based on dealer
     quotes.

     The company had outstanding  commodity futures contracts  covering the sale
     of 1,853  thousand  barrels  of crude  oil with a  notional  amount  of $38
     million and 8 billion  cubic feet of natural gas with a notional  amount of
     $18  million.  The fair  values of the  contracts,  based on quoted  market
     prices, were insignificant.

     The estimated fair value of the company's  long-term debt and capital lease
     obligations was $2,173 million.  The fair values of debt  instruments  were
     based on the  discounted  amount of future  cash  outflows  using the rates
     offered to the  company for debt with  similar  remaining  maturities.  The
     estimated fair value of the mandatorily redeemable convertible


                                       6



             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
                                   (Unaudited)

     preferred  securities of the company's  subsidiary  trust was $638 million,
     based on dealer quotes.

(10) Accrued Abandonment, Restoration And Environmental Liabilities:

     At  September  30,  1997,  the  company had  accrued  $495  million for the
     estimated   future  costs  to  abandon  and  remove  wells  and  production
     facilities. The total costs for abandonments are accrued predominately on a
     units-of-production  basis  and  are  estimated  to be $675  million.  This
     estimate was derived in large part from abandonment cost studies  performed
     by an independent firm and is used to calculate the amount to be amortized.

     At September 30, 1997, the company's reserve for environmental  remediation
     obligations  totaled  $282  million,  of which $73 million was  included in
     current  liabilities.  The reserve included estimated probable future costs
     of  $25  million  for  federal   Superfund  and  comparable   state-managed
     multiparty  disposal  sites;  $28 million for  formerly-operated  sites for
     which the  company  has  remediation  obligations;  $81  million  for sites
     related to businesses or  operations  that have been sold with  contractual
     remediation or indemnification obligations;  $119 million for company-owned
     or controlled  sites where  facilities  have been closed or operations shut
     down; and $29 million for sites owned and/or  controlled by the company and
     utilized in its ongoing operations.

(11) Contingent Liabilities:

     The company has certain  contingent  liabilities  with  respect to material
     existing or potential  claims,  lawsuits and other  proceedings,  including
     those involving environmental,  tax and other matters, certain of which are
     discussed more specifically  below. The company accrues liabilities when it
     is  probable  that  future  costs  will be  incurred  and such costs can be
     reasonably estimated.  Such accruals are based on developments to date, the
     company's  estimates of the outcomes of these matters and its experience in
     contesting,  litigating  and settling  other  matters.  As the scope of the
     liabilities  becomes better defined,  there may be changes in the estimates
     of future costs, which could have a material effect on the company's future
     results of operations and financial condition or liquidity.

     ENVIRONMENTAL MATTERS

     The company is subject to loss contingencies pursuant to federal, state and
     local  environmental  laws and  regulations.  These  include  existing  and
     possible  future  obligations to investigate  the effects of the release or
     disposal of certain  petroleum,  chemical and mineral substances at various
     sites; to remediate or restore these sites; to compensate others for damage
     to property and natural  resources,  for remediation and restoration  costs
     and for personal  injuries;  and to pay civil penalties and, in some cases,
     criminal penalties and punitive damages.  These obligations relate to sites
     owned by the  company or others and are  associated  with past and  present
     operations,  including  sites at which the company has been identified as a
     potentially  responsible  party (PRP) under the federal  Superfund laws and
     comparable  state laws.  Liabilities  are accrued when it is probable  that
     future costs will be incurred and such costs can be  reasonably  estimated.
     However,  in many  cases,  investigations  are not yet at a stage where the
     company  is able to  determine  whether it is liable  or, if  liability  is
     probable,  to  quantify  the  liability  or  estimate  a range of  possible
     exposure.  In such cases,  the  amounts of the  company's  liabilities  are
     indeterminate  due to the  potentially  large number of  claimants  for any
     given site or exposure,  the unknown  magnitude of possible  contamination,
     the  imprecise and  conflicting  engineering  evaluations  and estimates of
     proper  cleanup  methods and costs,  the  unknown  timing and extent of the
     corrective actions that may be required,  the uncertainty  attendant to the
     possible award of punitive damages,  the recent judicial recognition of new
     causes of action,  the present state of the law,  which often imposes joint
     and  several and  retroactive  liabilities  on PRPs,  and the fact that the
     company is usually just one of a number of companies identified as a PRP.

     As  disclosed in Note 10, at  September  30, 1997,  the company had accrued
     $282 million for estimated future environmental  assessment and remediation
     costs at various sites where  liabilities  for such costs are probable.  At
     those sites where  investigations  or feasibility  studies have advanced to
     the stage of  analyzing  feasible  alternative  remedies  and/or  ranges of
     costs,  the company  estimates that it could incur  additional  remediation
     costs aggregating approximately $190 million.

                                       7


             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
                                   (Unaudited)
     TAX MATTERS

     In  December  1994,  the company  received a Notice of Proposed  Deficiency
     (Notice) from the Internal  Revenue Service (IRS) related to the years 1985
     through 1987. In February 1995, the company filed a protest of the proposed
     tax deficiency  with the Appeals section of the IRS.  Discussions  with the
     Appeals Officer are ongoing,  but it is possible that the most  substantial
     issues  raised in the Notice will  proceed to  litigation.  In an effort to
     resolve these issues without  litigation,  in October 1996, the company and
     the IRS  entered  into an  Agreement  to Mediate.  While the  parties  have
     selected a mediator, no date for the mediation has been set.

     The most significant issue raised in the Notice relates to an IRS challenge
     of a $341 million deduction taken by the company in its 1985 tax return for
     amounts paid under a settlement  agreement  with Mesa  Petroleum,  T. Boone
     Pickens and Drexel Burnham Lambert,  Incorporated, and certain others which
     ended a hostile  takeover  attempt by that group. The IRS contends that the
     deduction is not  allowable  because the payment was related  solely to the
     purchase of the  company's  common  stock.  Although the company  purchased
     shares under the settlement  agreement,  it properly reflected the purchase
     in its  records  at the fair  market  value of the  shares  purchased.  The
     deduction  at issue  relates to that  portion of the payment made under the
     settlement agreement that exceeded the value of the shares purchased.

     The second  largest issue raised in the Notice  relates to an IRS challenge
     of a  continued  deferral of  intercompany  gains which arose from sales of
     property  between  subsidiaries in 1982 and 1983. The IRS contends that the
     $201 million  balance of deferred  gain must be recognized in the company's
     taxable income for 1985 when the subsidiaries contributed the property to a
     wholly-owned master limited partnership.

     The total amount of tax and interest  that the company would be required to
     pay if the IRS were  ultimately to prevail on both of the issues  described
     in the two preceding  paragraphs,  after application of foreign tax credits
     and overpayments  related to other issues, and assuming a full disallowance
     of the claim for refund discussed below, is estimated at $422 million as of
     September 30, 1997.

     During the first quarter of 1997,  the IRS  examination  team completed its
     review of a claim for refund recently filed by the company  relating to its
     1985 tax  liability.  If the company  ultimately  prevails in its claim for
     refund,  the liability for the issues  described  above would be eliminated
     and the  company  would be  entitled  to a refund for  overpayment  of tax.
     Although the IRS has not  formally  disallowed  the claim,  the company has
     been  informed that the IRS  examination  team believes the claim should be
     disallowed.  In April 1997, the IRS examination  team sent the issue raised
     by the claim to the IRS National Office for technical  advice. In September
     1997, the IRS  examination  team withdrew the technical  advice request and
     returned  the claim to the IRS Appeals  Officer for further  consideration.
     The company intends to vigorously defend the claim and dispute the proposed
     deficiency  and hopes to resolve  these  matters  during 1997.  Should that
     effort  fail,  final  resolution  of these  matters is likely to be several
     years away as they are not yet before a court.

     The company  believes it has adequately  provided in its accounts for items
     and issues not yet  resolved.  In the opinion of  management,  a successful
     outcome of these matters is reasonably likely. However, substantial adverse
     decisions  could  have  a  material  effect  on  the  company's   financial
     condition, operating results and liquidity in a given quarter and year when
     such matters are resolved.

     OTHER MATTERS

     The company also has certain other  contingent  liabilities with respect to
     litigation,  claims and  contractual  agreements  arising  in the  ordinary
     course of business.  Although these  contingencies could result in expenses
     or judgments that could be material to the company's  results of operations
     for a given reporting  period, on the basis of management's best assessment
     of the  ultimate  amount  and  timing of these  events,  such  expenses  or
     judgments  are  not  expected  to have a  material  adverse  effect  on the
     company's consolidated financial condition or liquidity.


                                       8


             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
                                   (Unaudited)

(12) Unocal guarantees  certain  indebtedness of Union Oil.  Summarized below is
     financial information for Union Oil and its consolidated subsidiaries:

 SUMMARIZED FINANCIAL DATA OF UNION OIL



                                                                                 For the Three Months          For the Nine Months
                                                                                  Ended September 30           Ended September 30
                                                                            --------------------------------------------------------
Millions of dollars                                                      1997             1996              1997                1996
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                     
Total revenues ............................................           $ 1,397           $ 1,337           $ 4,507            $ 3,944
Total costs and other deductions
   (including income taxes) ...............................             1,211             1,201             3,959              3,488
                                                                      --------------------------------------------------------------
Earnings from continuing operations .......................               186               136               548                456
Discontinued operations
   Earnings from operations (a) ...........................                --                37                --                 80
   Loss on disposal (b) ...................................                --                --               (44)                --
Extraordinary Item
   Early extinguishment of debt  (c) ......................                --                --               (38)                --
                                                                      --------------------------------------------------------------
Net earnings ..............................................           $   186           $   173           $   466            $   536
                                                                      --------------------------------------------------------------
<FN>
(a)  Net of tax of: .......................................           $  --             $    22           $    --            $    48
(b)  Net of tax benefit of: ...............................           $  --             $    --           $   (27)           $    --
(c)  Net of tax benefit of: ...............................           $  --             $    --           $   (14)           $    --
</FN>





                                                                                         At September 30              At December 31
                                                                                         -------------------------------------------
Millions of dollars                                                                                1997                         1996
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                           
Current assets ...........................................................                       $1,559                       $3,228
Noncurrent assets ........................................................                        5,925                        5,905
Current liabilities ......................................................                          979                        1,622
Noncurrent liabilities ...................................................                        3,555                        4,704
Shareholder's equity .....................................................                        2,950                        2,807
                                                                                                                              ------


                                       9





OPERATING HIGHLIGHTS                                                                                    UNOCAL CORPORATION
(Unaudited)


                                                                             For the Three Months      For the Nine Months
                                                                              Ended September 30        Ended September 30
                                                                            ----------------------------------------------
                                                                               1997         1996         1997         1996
- --------------------------------------------------------------------------------------------------------------------------
NET DAILY PRODUCTION
   Crude oil and condensate (thousand barrels daily)
      United States
                                                                                                       
         Spirit Energy 76 ..........................................           40.8         51.4         45.0         51.7
         Other (a) .................................................           29.8         34.7         31.5         47.2
                                                                            ----------------------------------------------
           Total United States .....................................           70.6         86.1         76.5         98.9
      International
         Far East (b) ..............................................           96.2         82.2         94.9         82.4
         Other .....................................................           24.9         27.2         25.9         27.6
                                                                            ----------------------------------------------
           Total International .....................................          121.1        109.4        120.8        110.0
      Worldwide ....................................................          191.7        195.5        197.3        208.9
                                                                            ----------------------------------------------

   Natural gas (million cubic feet daily)
      United States
         Spirit Energy 76 ..........................................          844.5        928.4        875.7        917.0
         Other (a) .................................................          109.6        146.8        130.8        164.5
                                                                            ----------------------------------------------
           Total United States .....................................          954.1      1,075.2      1,006.5      1,081.5
      International
         Far East (b) ..............................................          790.0        666.5        789.5        625.7
         Other .....................................................           54.8         63.0         61.7         71.1
                                                                            ----------------------------------------------
           Total International .....................................          844.8        729.5        851.2        696.8
      Worldwide ....................................................        1,798.9      1,804.7      1,857.7      1,778.3
                                                                            ----------------------------------------------

   Natural gas liquids (thousand barrels daily) (a) ................           17.8         19.3         18.7         19.6
   Geothermal (million kilowatt-hours daily) .......................           18.7         21.0         17.2         17.3

                                                                            ----------------------------------------------
(a) Includes production from California upstream properties of:
      Crude oil and condensate .....................................             --          1.0           --         10.9
      Natural gas ..................................................             --           --           --         17.2
      Natural gas liquids ..........................................             --           --           --          0.2

(b) Includes host country share in Indonesia of:
      Crude oil and condensate .....................................           27.9         26.4         29.2         26.8
      Natural gas ..................................................           21.9         29.1         26.6         26.2



                                       10





OPERATING HIGHLIGHTS (continued)                                                   UNOCAL CORPORATION
(Unaudited)


                                                         For the Three Months     For the Nine Months
                                                          Ended September 30       Ended September 30
                                                      -----------------------------------------------
                                                           1997           1996        1997       1996
- -----------------------------------------------------------------------------------------------------
AVERAGE SALES PRICES
   Crude oil and condensate (per barrel)
      United States
                                                                                
         Spirit Energy 76 .........................   $   18.27   $      21.80   $   20.01  $   20.33
         Other ....................................       13.36          17.37       15.39      16.52
           Total United States ....................       16.13          20.01       18.09      18.31
      International
         Far East .................................   $   17.45   $      18.89   $   18.72  $   18.32
         Other ....................................       16.58          19.89       17.58      18.53
           Total International ....................       17.23          19.21       18.41      18.39

      Worldwide ...................................   $   16.73   $      19.62   $   18.26  $   18.34
- -----------------------------------------------------------------------------------------------------
   Natural gas (per thousand cubic feet)
      United States
         Spirit Energy 76 .........................   $    2.31   $       2.23   $    2.42  $    2.34
         Other ....................................        1.47           1.36        1.39       1.42
           Total United States ....................        2.21           2.09        2.29       2.20
      International
         Far East .................................   $    2.39   $       2.27   $    2.35  $    2.23
         Other ....................................        2.40           2.05        2.23       1.82
           Total International ....................        2.39           2.25        2.34       2.18

      Worldwide ...................................   $    2.29   $       2.15   $    2.31  $    2.20
- -----------------------------------------------------------------------------------------------------
AGRICULTURAL PRODUCTS PRODUCTION VOLUMES
(thousand tons)
   Ammonia ........................................         314            360       1,072      1,089
   Urea ...........................................         188            275         696        845
   Other products .................................         146            149         494        494

AGRICULTURAL PRODUCTS SALES VOLUMES (thousand tons)
   Ammonia ........................................         187            206         590        574
   Urea ...........................................         191            198         690        779
   Other products .................................         200            302         907        971



                                       11


ITEM 2. MANAGEMENT'S  DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS

The Management's  Discussion and Analysis of Financial  Condition and Results of
Operations for the three and nine month periods ended  September 30, 1997 should
be read in  conjunction  with  Unocal's  Management's  Discussion  and  Analysis
reported in the 1996 Annual Report on Form 10-K (as amended).

Unocal  explores for,  develops,  produces and markets crude oil and natural gas
resources  around the world.  The company's  largest  operations are in the Gulf
Coast region of the United States and in Southeast Asia. In addition,  Unocal is
the world's  leading  geothermal  energy producer and  manufactures  and markets
nitrogen-based fertilizers, petroleum coke, graphites, and specialty minerals.

CONSOLIDATED RESULTS


                                                                                For the Three Months           For the Nine Months
                                                                                 Ended September 30             Ended September 30
                                                                                ----------------------------------------------------
Millions of Dollars                                                           ` 1997           1996            1997            1996
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                    
Reported net earnings ..............................................          $ 177           $ 171           $ 439           $ 533
Special items:
    Bangladesh well blowout ........................................             --              --              (7)             --
    UNO-VEN restructuring ..........................................             --              --              39              --
    Deferred tax adjustments .......................................            185              --             192              --
    Impairment of long-lived assets (SFAS No. 121) .................            (39)             --             (39)             --
    Litigation provisions ..........................................            (20)            (20)            (25)            (32)
    Environmental remediation provisions ...........................            (41)            (12)            (50)            (38)
    Asset sales ....................................................             (2)             48              30             130
    Other ..........................................................             --              --              --              (9)
    Discontinued operations:
       Loss on disposal ............................................             --              --             (44)             --
       Asset sales and miscellaneous ...............................             --               2              --               4
    Extraordinary item .............................................             --              --             (38)             --
                                                                              ------------------------------------------------------
   Total special items .............................................             83              18              58              55
                                                                              ------------------------------------------------------
Adjusted net earnings ..............................................          $  94           $ 153           $ 381           $ 478
                                                                              ------------------------------------------------------


For the third  quarter  and first nine  months of 1997,  adjusted  net  earnings
reflected  lower  domestic crude oil and natural gas  production,  lower average
worldwide  crude  oil  sales  prices  and  higher  depreciation,  depletion  and
amortization  (DD&A) expense.  Partially  offsetting these negative factors were
improved  international  natural  gas and crude  oil  production,  primarily  in
Thailand and Indonesia,  higher average  worldwide  natural gas sales prices and
lower interest expense.

EXPLORATION AND PRODUCTION



                                                                                   For the Three Months         For the Nine Months
                                                                                    Ended September 30          Ended September 30
                                                                                 ---------------------------------------------------
Millions of Dollars                                                                1997          1996          1997            1996
- ------------------------------------------------------------------------------------------------------------------------------------
Reported net earnings
   United States
                                                                                                                     
      Spirit Energy 76 ...............................................          $   6           $  55          $ 144           $ 215
      Other ..........................................................             10              22             42             126
   International .....................................................            128             107            259             245
                                                                                ----------------------------------------------------
      Total ..........................................................            144             184            445             586
Special items:
    Impairment of long-lived assets (SFAS No. 121) ...................            (39)             --            (39)            --
    Deferred tax adjustment ..........................................             68              --             68             --
    Bangladesh well blowout ..........................................             --              --             (7)            --
    Asset sales ......................................................             (1)             40            (15)            114
                                                                                ----------------------------------------------------
         Total special items .........................................             28              40              7             114
                                                                                ----------------------------------------------------
Adjusted net earnings ................................................          $ 116           $ 144          $ 438           $ 472
                                                                                ----------------------------------------------------


                                       12


ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS (CONTINUED)

Compared  with the third  quarter  and first nine months of 1996,  adjusted  net
earnings for 1997 decreased $28 million,  or 19 percent,  and $34 million,  or 7
percent,  respectively.  These  decreases  were due primarily to lower  domestic
crude oil and natural gas  production,  higher  worldwide DD&A expense and lower
average  worldwide crude oil sales prices.  Partially  offsetting these negative
factors were increased  natural gas and crude oil production in the Far East and
higher average worldwide natural gas sales prices.

During the third  quarter  and first  nine  months of 1997,  domestic  crude oil
production  decreased  18 percent and 23  percent,  respectively,  and  domestic
natural gas production decreased 11 percent and 7 percent,  respectively.  These
decreases were due primarily to natural  declines,  hurricane  related shut-ins,
mechanical  problems  in some  high  output  wells and  delays  in the  drilling
program.  Higher  international   production,   principally  from  Thailand  and
Indonesia,  partially offset the domestic production declines.  During the third
quarter  and first  nine  months  of 1997,  international  crude oil  production
increased 11 percent and 10 percent, respectively, and international natural gas
production increased 16 percent and 22 percent, respectively.

Adjusted  worldwide  DD&A expense for the third quarter and first nine months of
1997  increased  26 percent  and 17  percent,  respectively,  due  primarily  to
negative  reserve  adjustments  in the  United  States and  Thailand,  increased
production  from higher rate fields in the United States,  higher  production in
Thailand and higher capital spending in Indonesia.

Compared  with the third  quarter  of 1996,  average  worldwide  crude oil sales
prices  decreased  from  $19.62 to $16.73 per  barrel,  a 15  percent  decrease.
Average  worldwide crude oil sales prices for the first nine months of 1997 were
essentially  unchanged  from the same period in 1996.  For the third  quarter of
1997,  average  worldwide natural gas sales prices increased from $2.15 to $2.29
per thousand  cubic feet (mcf),  and for the first nine months of 1997,  average
worldwide natural gas sales prices increased from $2.20 to $2.31 per mcf.

Special items for the third quarter of 1997 primarily consisted of a $39 million
write-down for the impairment of long-lived  assets and a $68 million  reduction
in deferred taxes for Thailand related to recent currency devaluations.  Special
items  for the first  nine  months of 1997 also  included  a $7  million  charge
related to a gas-ignited  exploration well blowout in northeast Bangladesh and a
$17 million loss on the sale of the company's United Kingdom operations.

GEOTHERMAL OPERATIONS




                                                                            For the Three Months                For the Nine Months
                                                                             Ended September 30                Ended September 30
                                                                         -----------------------------------------------------------
Millions of Dollars                                                        1997             1996              1997             1996
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                     
Reported net earnings ......................................               $ 6               $ 6               $25               $15
Special items:
   Deferred tax adjustments ................................                 3                --                10                --
                                                                           ---------------------------------------------------------
Adjusted net earnings ......................................               $ 3               $ 6               $15               $15
                                                                           ---------------------------------------------------------


Compared with the third  quarter of 1996,  the decrease in adjusted net earnings
were the result of decreased  revenues in the Philippines due to the deferral of
60 percent of the  revenues and related  earnings  pending the  settlement  of a
dispute  regarding  extension  of the  company's  service  contract  and foreign
exchange  losses,  primarily in Indonesia.  Partially  offsetting these negative
factors was higher steam  generation in Indonesia.  During the first nine months
of 1997, adjusted net earnings reflected higher steam generation in all areas of
operation,  decreased  dry hole  expense  in  Indonesia  and lower  depreciation
expense due to the sale of domestic geothermal assets in 1996.  Offsetting these
positive  factors were the negative factors  previously  discussed for the third
quarter of 1997.

During the third quarter and first nine months of 1997,  the company  recorded a
$3 million deferred tax benefit for exploration  expenses incurred for a project
in Japan.  In 1997, the company also recorded a $7 million  deferred tax benefit
related to prior year exploration  expenses  incurred for the Sarulla project in
Indonesia.


                                       13




ITEM 2. MANAGEMENT'S  DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS (CONTINUED)

DIVERSIFIED BUSINESS GROUP



                                                                               For the Three Months              For the Nine Months
                                                                               Ended September 30                Ended September 30
                                                                             -------------------------------------------------------
Millions of Dollars                                                          1997              1996            1997             1996
- ------------------------------------------------------------------------------------------------------------------------------------
Reported net earnings
                                                                                                                     
   Agricultural Products .......................................             $  4             $ 20             $ 50             $ 73
   Carbon and Minerals .........................................               10               13               76               40
   Pipelines ...................................................               16               14               46               51
   Other .......................................................               --                3               37                9
                                                                             -------------------------------------------------------
   Total .......................................................               30               50              209              173
Special items:
   UNO-VEN restructuring (Other) ...............................               --               --               39              --
   Carbon and Minerals (asset sales) ...........................               --               --               41              --
   Pipelines (asset sales) .....................................               --               --               --                7
                                                                             -------------------------------------------------------
   Total special items .........................................               --               --               80                7
                                                                             -------------------------------------------------------
Adjusted net earnings ..........................................             $ 30             $ 50             $129             $166
                                                                             -------------------------------------------------------


Compared  to the third  quarter  and first  nine  months of 1996,  adjusted  net
earnings decreased 40 percent and 22 percent,  respectively,  principally due to
lower  agricultural   products  sales  prices,  sales  volumes  and  production.
Agricultural  products  production  was lower as a result of  maintenance at the
Kenai,  Alaska facility,  mechanical problems and market related urea production
cuts.  Decreased demand in China for nitrogen  fertilizers,  particularly  urea,
impacted both agricultural products sales volumes and sales prices beyond normal
seasonal declines.  Lower lanthanide margins,  primarily due to price cutting by
China, and the elimination of earnings attributable to the UNO-VEN restructuring
and the  sale  of the  Unocal  Hydrocarbon  Sales  business  also  impacted  the
Diversified Business Group's results.

CORPORATE AND UNALLOCATED



                                                                            For the Three Months                For the Nine Months
                                                                             Ended September 30                 Ended September 30
                                                                           ---------------------------------------------------------
Millions of Dollars                                                         1997            1996             1997              1996
- ------------------------------------------------------------------------------------------------------------------------------------
Reported net earnings effect
                                                                                                                     
   Administrative and general expense ..........................           $ (13)           $ (21)           $ (40)           $ (55)
   Net interest expense ........................................             (19)             (37)             (84)            (135)
   Environmental and litigation expense ........................             (65)             (37)             (86)             (84)
   New Ventures ................................................              (1)              (7)             (23)             (13)
   Other .......................................................              95               (4)              75              (34)
                                                                           ---------------------------------------------------------
   Total .......................................................              (3)            (106)            (158)            (321)
Special items:
     Environmental and litigation provisions ...................             (61)             (32)             (75)             (70)
     Asset sales (Other) .......................................              (1)               8                4                9
     Deferred  tax adjustment (Other) ..........................             114               --              114               --
     Miscellaneous (Other) .....................................              --               --               --               (9)
                                                                           ---------------------------------------------------------
   Total special items .........................................              52              (24)              43              (70)
                                                                           ---------------------------------------------------------
Adjusted net earning effect ....................................           $ (55)           $ (82)           $(201)           $(251)
                                                                           ---------------------------------------------------------


Compared  with the third  quarter  and first nine months of 1996,  net  interest
expense  decreased  49  percent  and 38  percent,  respectively,  as a result of
increased  capitalized  interest  and a decreased  debt  level.  Included in the
Corporate and  Unallocated  Other  category for the third quarter and first nine
months of 1997 was a $7 million charge for a reinsurance obligation that was the
result of a platform  fire in  Indonesia.  For the third  quarter and first nine
months of 1997,  the  company  reported  a special  item of $114  million  for a
reduction  of  deferred  taxes  related  to the  reassessment  of the  company's
exposure for pending federal income tax appeals.

                                       14


ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS (CONTINUED)

DISCONTINUED OPERATIONS

During the first nine months of 1997, the company recorded an additional loss on
disposal of its West Coast refining,  marketing and transportation operations of
$44 million (net of a $27 million tax benefit).  See Note 3 to the  consolidated
financial statements for additional information.

FINANCIAL CONDITION AND CAPITAL EXPENDITURES

For the  first  nine  months  of 1997,  cash  flow  from  operating  activities,
including  working  capital  changes,  was $736  million,  compared  with $1,199
million  in 1996.  During  the  first  nine  months  of 1997,  the  discontinued
refining,  marketing and  transportation  operations had a negative cash flow of
$20  million,  compared  with a positive  cash flow of $244 million for the same
period in 1996. The 1997 cash flow from operations also reflected an $81 million
escrow payment  related to the  settlement of the "Catacarb"  litigation and $27
million for the company's  buy-out of environmental  liabilities  related to the
UNO-VEN partnership restructuring. Also impacting cash flow from operations were
lower  domestic  crude oil and  natural  gas  production,  higher  international
exploration expense and lower agricultural products prices. Partially offsetting
these  negative  factors  were  higher  international  crude oil and natural gas
production,  higher average  worldwide  natural gas sales prices,  and lower net
interest expense.

Proceeds from asset sales were $1,844 million for the first nine months of 1997.
The  amount  consisted  of:  $1,789  million  from the  sale of the  West  Coast
refining,   marketing  and   transportation   assets;  $25  million  for  Unocal
Hydrocarbon  Sales, $6 million from the sale of one of the company's  airplanes,
$12 million for  miscellaneous  real estate  properties and $12 million from the
sale of miscellaneous assets including various oil and gas properties.

Capital  expenditures for the first nine months of 1997 totaled $953 million, an
increase of $13 million from the 1996 level of $940  million,  due  primarily to
increased  international oil and gas activity. The company's preliminary capital
expenditure plan for 1998 could be as much as $1.5 billion, up from an estimated
$1.4 billion in 1997. The exploration  capital spending program for 1998 is $568
million, up more than 50 percent from the estimated 1997 level. During 1998, the
company expects to drill more than 189 exploration wells.

Consolidated  working capital at September 30, 1997 was $586 million, a decrease
of $1,020  million from the year-end 1996 level of $1,606  million.  Included in
the 1996 amount was $1,774 million in net assets of discontinued operations. The
decline in working capital  reflects  primarily the application of proceeds from
the sale of these assets to the debt reduction  described  below, as well as the
company's  repurchase  of the $200  million  undivided  interest  in pool  trade
receivables, which it had previously sold.

The company's total debt was $2,078 million at September 30, 1997, a decrease of
$980 million from the year-end 1996 level of $3,058 million.  The  debt-to-total
capitalization  ratio  decreased to 42 percent from 52 percent at year-end 1996.
The  company  used a portion  of the  proceeds  from the sale of its West  Coast
refining,  marketing  and  transportation  assets to reduce long term debt.  See
Notes 8 and 9 to the consolidated financial statements for related information.

Through  September  30,  1997,  the company had  repurchased  approximately  4.5
million shares of common stock for a total cost of  approximately  $173 million.
As of  November  7, 1997,  the  company  repurchased  approximately  1.6 million
additional shares of common stock for a cost of approximately $65 million.

ENVIRONMENTAL MATTERS

At September 30, 1997,  the  company's  reserves for  environmental  remediation
obligations  totaled $282 million,  of which $73 million was included in current
liabilities. During the third quarter, cash payments of $19 million were applied
against the reserve and an additional $67 million in  liabilities  were recorded
to the reserve account, primarily due to changes in estimated future remediation
costs as  discussed  below.  The  company  also  estimates  that it could  incur
additional   remediation  costs  aggregating   approximately  $190  million,  as
discussed in Note 11 to the  consolidated  financial  statements.  The company's
total environmental reserve is grouped into the following five categories:


                                       15



ITEM 2. MANAGEMENT'S  DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS (CONTINUED)

RESERVE SUMMARY

                                                                   September 30,
Millions of Dollars                                                         1997
- --------------------------------------------------------------------------------
   Superfund and similar sites .................................            $ 25
   Former company-operated sites ...............................              28
   Company facilities sold with
     retained liabilities ......................................              81
   Inactive or closed company facilities .......................             119
   Active company facilities ...................................              29
                                                                            ----
      Total reserves ...........................................            $282
                                                                            ----

At year-end 1996, Unocal had received  notification from the U.S.  Environmental
Protection Agency that the company may be a potentially  responsible party (PRP)
at 39 sites and may share  certain  liabilities  at these  sites.  In  addition,
various state  agencies and private  parties had identified 37 other similar PRP
sites that may  require  investigation  and  remediation.  During the first nine
months of 1997, 10 sites were added and four sites were resolved  resulting in a
total of 82 sites.  Of the total,  the  company has denied  responsibility  at 6
sites and at another 8 sites the  company's  liability,  although  unquantified,
appears to be de  minimis.  The total  also  includes  27 sites  which are under
investigation or in litigation,  for which the company's  potential liability is
not  presently  determinable.  At  another  two  sites,  the  company  has  made
settlement payments and is in the final process of resolving its liabilities. Of
the remaining 39 sites,  where probable costs can be estimated,  reserves of $25
million have been established for future remediation and settlement costs. These
82 sites  exclude 60 sites where the company's  liability  has been settled,  or
where  the  company  has both no  evidence  of  liability  and there has been no
further  indication of liability by government  agencies or third parties for at
least a 12-month period.

Unocal does not  consider  the number of sites for which it has been named a PRP
as a relevant measure of liability. Although the liability of a PRP is generally
joint  and  several,  the  company  is  usually  just one of  several  companies
designated as a PRP. The company's  ultimate share of the  remediation  costs at
those sites often is not  determinable  due to many unknown factors as discussed
in Note 11. The solvency of other  responsible  parties and  disputes  regarding
responsibilities may also impact the company's ultimate costs.

The  company is subject to a number of  federal,  state and local  environmental
laws  and  regulations,  including  the  Comprehensive  Environmental  Response,
Compensation   and  Liability  Act  of  1980,  as  amended,   and  the  Resource
Conservation  and Recovery Act (RCRA).  Under these laws, the company is subject
to possible  obligations to remove or mitigate the environmental  effects of the
disposal or release of certain  chemical  and  petroleum  substances  at various
sites.

Corrective  investigations  and actions  pursuant to RCRA are being performed at
the company's Beaumont,  Texas, facility, its closed Colorado shale oil project,
and its  Washington,  Pennsylvania,  facility.  The  company  also must  provide
financial   assurance  for  future  closure  and   post-closure   costs  of  its
RCRA-permitted  facilities.  Because  these costs will be incurred at  different
times  and  over a  period  of many  years,  the  company  believes  that  these
obligations  are not likely to have a material  adverse  effect on the company's
results of operations or financial condition.

On May 14,  1997,  a draft  environmental  impact  report  (EIR)  prepared  by a
consultant to the County of San Luis Obispo,  California,  was issued for use by
the County,  the Regional Water Quality Board -- Central Coast Region and others
in  evaluating  the  company's   proposed  remedial  action  plan,  as  well  as
alternative  courses of action,  for  remediation of the  underground  petroleum
hydrocarbon  contamination  at Avila Beach,  California,  resulting  from former
company  operations.  The company  reviewed the alternatives  addressed  therein
versus the expected  environmental  benefits, and issued comments in this regard
as well as  comments  on other  procedural  and  substantive  issues  subject to
appeal. The county accepted public comments on the draft EIR for a 60-day period
through July 14, 1997. These comments will be used to determine the final EIR.

On August  25,  1997,  the County of San Luis  Obispo  issued a draft EIR on the
company's  remediation and abandonment plans for the Guadalupe Oil Field located
on the central coast of California.  The field is contaminated  with diluent,  a
kerosene-like  additive used in the company's former operations at the site. The
draft EIR will  allow the  company,  the  general  public,  the county and other
regulatory   agencies  to  evaluate  the  company's  proposed   remediation  and
abandonment plan, as well as

                                       16


ITEM 2. MANAGEMENT'S  DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS (CONTINUED)

alternative  courses of  action,  for the  field.  Certain  of the  alternatives
addressed in the draft EIR would, if implemented, result in significantly higher
remediation  costs than the costs for the company's  proposed  plan. The company
has completed its review of the draft EIR and issued  extensive  comments to the
county on November 4, 1997.

In the third quarter of 1997, the company added approximately $55 million to the
remediation  reserve for the estimated costs of the company's clean-up plans for
Avila  Beach,  Guadalupe  and  associated  projects.  The costs for Avila  Beach
include  expenses  for  excavation  of  the  affected  sections  of  the  beach;
bioremediation  of the town area;  development of mitigation  projects that will
benefit the community;  and  decommissioning  and dismantlement of storage tanks
that overlook the town.  There is a reasonable  possibility that the company may
incur  additional,  but presently  indeterminate,  expenses for these sites. The
ultimate clean-up costs will be affected by the EIR's,  which are expected to be
finalized in early 1998.

See Notes 10 and 11 for related information.

OUTLOOK

Certain of the statements in this discussion,  as well as other  forward-looking
statements  within this document,  contain  estimates and  projections of future
revenues,  earnings, cash flows, capital expenditures,  assets,  liabilities and
other  financial  items and of  future  levels of  reserves,  production,  sales
including  related  costs and prices,  and other  statistical  items;  plans and
objectives of management regarding the company's future operations, products and
services;  and certain assumptions  underlying such estimates,  projection plans
and objectives.  While these forward-looking  statements are made in good faith,
future   operating,   market,   competitive,    legal,   economic,    political,
environmental,  and other  conditions  and events could cause actual  results to
differ materially from those in the forward-looking statements.

During the fourth  quarter of 1997,  the  company  expects  increased  operating
earnings  due to higher  natural  gas  prices  in the  United  States,  improved
agricultural  products  sales volumes and  production and expansion of the Salak
geothermal resource and power plant project in Indonesia. 

In 1998,  the company  expects net worldwide  oil and gas  production to average
more than 560,000 barrels of oil equivalent (boe) per day, up seven percent from
an estimated  525,000 boe per day in 1997.  The company is  targeting  growth to
more than 700,000 boe per day by 2001.

ASIAN ECONOMIC DOWNTURN

While the economic  downturn in Southeast Asia is  significant,  the company has
experienced no material  negative  impact as a result of these recent events and
continues to expect no significant  financial  impact.  The company believes the
steps being taken by the affected governments in the region and by international
financial institutions will alleviate the situation.  In Thailand, the company's
gas sales  contracts  provide for  adjustments  in the event of a devaluation of
more than five percent of the baht in relation to the United States  dollar.  In
Indonesia and the Philippines, revenues from the company's operations are either
dollar-denominated or indexed to the United States dollar.

UNITED STATES EXPLORATION AND PRODUCTION

In an effort to increase  domestic  crude oil and natural  gas  production,  the
company  expects  to  increase  the  number of rigs it  employs to 17 during the
fourth quarter of 1997. The company also signed a memorandum of understanding on
September 19, 1997,  with Smedvig  Offshore  Limited for a deepwater  drill ship
that can  operate in 10,000 feet of water.  The drill ship is designed  for dual
activity and has  capabilities  for  production  testing.  The ship is currently
under construction and is scheduled to start drilling operations in late 1998 or
early 1999.

On October 6, 1997, the company discovered oil in Terrebonne Parish,  Louisiana.
The  discovery  well tested at an average daily rate of 1,068 barrels of oil and
3.3 million cubic feet of gas. Production is expected to begin in December 1997,
once the production  facilities  are  completed.  The company holds a 40 percent
working interest in the well.

In the Gulf of Mexico,  the company recently tested a deepwater oil discovery in
Garden  Banks  409  and  is  currently  exploring  development  alternatives.  A
production  test on one of these wells  drilled on the block wells yielded 7,266
barrels of oil and 3.7


                                       17




ITEM 2. MANAGEMENT'S  DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS (CONTINUED)

million  cubic feet of gas per day. The  project,  called  Ladybug,  is in close
proximity to existing  infrastructure  at Garden Banks 189,  which will serve as
host facility. The company holds a 50 percent working interest in the project.

INTERNATIONAL EXPLORATION AND PRODUCTION

In  Indonesia,  the  company  successfully  tested a  stepout  delineation  well
offshore East Kalimantan that establishes significant natural gas and condensate
production potential in the deepwater area of the Mahakam Delta. The well tested
at a rate of 24.8 million  cubic feet of gas and 860 barrels of  condensate  per
day. The company holds a 50 percent working interest in the project.

The company is currently  considering the  restructuring of certain Canadian oil
and gas assets held by its Unocal Canada,  Ltd.  subsidiary.  The  restructuring
could involve an exchange of assets for an equity  interest in a publicly traded
Canadian oil and gas company or the  formation of an alliance,  joint venture or
operating  partnership  with a Canadian  firm.  The  company's  objective  is to
enhance the long-term growth and value of its Canadian oil and gas properties.

The $1 billion Yadana natural gas  development  project  remains on schedule for
its August 1, 1998  completion.  The onshore  Myanmar portion of the pipeline is
essentially completed.  Efforts are now focused on the offshore  infrastructure,
including a 215 mile pipeline and four platforms.  Although the Thai side of the
project has faced  challenges,  approximately 118 miles of the pipeline has been
installed  or is under  construction.  Construction  of the  remaining  32 miles
nearest the Myanmar  border is  expected to begin  during the fourth  quarter of
1997, with  completion  scheduled for June 1998. The company has a 28.26 percent
working interest in the project.

In Thailand,  the company  successfully  tested two exploration wells. The wells
are part of a program  to  evaluate  the new  Maragot  field  offshore  on Block
B12/26. The company is evaluating  development options and expects to bring this
field  on-stream  following  the start-up of  production  from the Pailin field,
which is scheduled to begin in late 1998. The company holds a 35 percent working
interest in the concession block, which includes the Pailin field.

GEOTHERMAL OPERATIONS

In Indonesia,  at the Salak field on the Island of Java,  the operation of a new
165-megawatt  power plant began in the second week of October  when the first of
three 55-megawatt Units came on-line.  During the first week of November, Unit 5
began  operations and Unit 6 is expected to come on-line in late  November.  The
company's  fourth  quarter  results  will  benefit  from  the  start-up  of this
165-megawatt power plant.

DIVERSIFIED BUSINESS GROUP

Fourth quarter 1997 results for the Agricultural  Products Group are expected to
improve as a result of seasonal  increases in demand for agricultural  products.
In addition,  the company is  restructuring  its  lanthanides  business  unit in
response to current  lanthanides  market conditions.  This restructuring  effort
should  result in improved  customer  focus and product line  profitability  and
reduced  overall  operating  costs.  This  restructuring  will also  result in a
manpower  reduction  at the  company's  Mountain  Pass  facility.  The  expected
completion of the restructuring is early 1998.

                           PART II - OTHER INFORMATION

ITEM 1.   LEGAL PROCEEDINGS

There is incorporated by reference the information previously reported in Item 3
of Unocal's  Annual Report on Form 10-K (as amended) for the year ended December
31,  1996 (1996  Form 10-K (as  amended))  and in Item 1 of Part II of  Unocal's
Quarterly  Reports on Form 10-Q for the  quarters  ended  March 31,  1997 (First
Quarter 1997 Form 10-Q) and June 30, 1997 (Second  Quarter 1997 Form 10-Q),  the
information  regarding  environmental  remediation  reserves  in  Note 10 to the
consolidated financial statements in Item 1 of Part I, the discussion thereof in
the  Environmental  Matters section of  Management's  Discussion and Analysis in
Item 2 of Part I, and the information  regarding contingent  liabilities in Note
11 to the consolidated financial statements in Item 1 of Part I.


                                       18


                     PART II - OTHER INFORMATION (continued)

(1)      With reference to the action entitled Atlantic  Richfield  Company,  et
                                               ---------------------------------
         al. v. Unocal  Corporation,  et al., involving the company's patent for
         -------------------------------------
         certain compositions of reformulated  gasoline,  described in Paragraph
         (6) of Item 3 of the 1996 Form 10-K (as amended),  on October 14, 1997,
         following the first phase of a trial which  commenced in July 1997, the
         jury  rendered  a verdict  upholding  the  validity  of the  patent and
         finding  that  Atlantic  Richfield  Company  and  the  other  five  oil
         companies  party to the action had infringed the patent with respect to
         approximately  29 percent,  or 1.2  billion  gallons,  of the  gasoline
         produced by them in California  during the five-month period from March
         through July 1996 at issue in the trial. On November 3, 1997, following
         a second phase of the trial,  the jury rendered a verdict  awarding the
         company damages of 5.75 cents per infringing gallon, or $69 million for
         the five-month  period. A third phase of the trial,  relating to issues
         of  "inequitable  conduct," is scheduled to be heard by the trial judge
         commencing in early December 1997.

(2)      With  reference  to  the  litigation   arising  from  past  underground
         petroleum  pipeline  leaks at Avila  Beach,  California,  described  in
         Paragraph  (9) of Item 3 of the  1996  Form  10-K (as  amended)  and in
         Paragraph (3) of Item 2 of Part II of the First Quarter 1997 Form 10-Q,
         there are currently 14 lawsuits filed in the California  Superior Court
         for San Luis  Obispo  County  that  have been  served  on the  company.
         Thirteen  of the  suits  are  individually  based,  with a total of 107
         plaintiffs.  The other suit is a purported class action filed by owners
         of a local time-share  complex.  In addition,  the California  Attorney
         General's Office  contacted  Unocal and held a "pre-filing"  meeting to
         discuss remediation  alternatives,  mitigation,  penalties and possible
         claims for natural resource damages. The Attorney General's Office also
         filed a notice  of intent to sue  based on  Resource  Conservation  and
         Recovery Act Section 7002 allegations.

         In an effort to resolve property damage and business loss claims by the
         local  community and discourage  additional  lawsuits from being filed,
         the company has announced a voluntary  settlement  program for property
         and business owners in the town of Avila Beach.

(3)      With  reference to the  litigation  involving the Yadana gas project in
         Myanmar,  described in  Paragraph  (13) of Item 3 of the 1996 Form 10-K
         (as  amended),  in  Paragraph  (5) of Item 1 of  Part  II of the  First
         Quarter 1997 Form 10-Q,  and in  Paragraph  (2) of Item 1 of Part II of
         the Second Quarter 1997 Form 10-Q,  several  developments have occurred
         that may affect the course of the litigation:

         In John Doe I, et al. v. Unocal  Corp.,  et al., the court on September
            ---------------------------------------------
         18, 1997,  granted in part and denied in part the  company's  motion to
         strike from the plaintiffs' complaint allegations  concerning claims of
         wrongful taking of property.

         The  hearing on the  plaintiffs'  motion for a  preliminary  injunction
         (which seeks to enjoin the company from  further  participation  in the
         Yadana  gas   project)  and  on  the   plaintiffs'   motion  for  class
         certification is set for December 8, 1997.

         Defendant Total's motion  to dismiss for lack of personal  jurisdiction
         remains pending before the court.

         In  National  Coalition  Government  of the Union of Burma,  et al. v.
             ------------------------------------------------------------------
         Unocal,  Inc., et al., the company's  motion to dismiss was granted in
         ---------------------
         part and denied in part on October 30, 1997. 
                  
(4)      With  reference  to the matter  entitled  Aguilar,  et al. v.  Atlantic
                                                   -----------------------------
         Richfield,  et al.,  alleging  that the  company  and other oil company
         -------------------  
         defendants  conspired  to fix  the price of  reformulated  gasoline  in
         California in restraint of trade, described in  Paragraph (7) of Item 1
         of Part II of the First  Quarter 1997  Form 10-Q,  on October 17, 1997,
         the court granted the defendants' motion for  summary judgment. Counsel
         for the plaintiffs has stated his  intention to seek a  reconsideration
         of the court's decision.

ITEM 2.  CHANGES IN SECURITIES

During the third quarter of 1997,  the company  awarded 5,156  restricted  stock
units to certain  nonemployee  directors  pursuant to the terms of the company's
Directors'  Restricted  Stock  Plan.  The units  were not  registered  under the
Securities  Act of 1933 (the Act) in reliance  upon the  exemption  contained in
Section 4(2) of the Act for  transactions  by an issuer not involving any public
offering.  The units were awarded (1) in  consideration of the prior election by
each of the nonemployee directors to


                                       19


                     PART II - OTHER INFORMATION (continued)

defer  all or a  portion  of his or her cash  fees and (2)  upon the  credit  of
dividend  equivalents upon units previously issued. The units are paid out in an
equal number of shares of Unocal common stock at the end of a restriction period
elected by each director, or upon his or her earlier termination of service as a
director.

During the third  quarter of 1997,  Unocal issued 727 shares of its common stock
upon the  conversion  of 620 of the 6-1/4 percent  trust  convertible  preferred
securities of Unocal Capital Trust.  The common shares were not registered under
the Act in reliance upon the exemption  contained in Section  3(a)(9) of the Act
for  securities  exchanged  by the  issuer  with its  existing  security-holders
exclusively where no commission or other  remuneration is paid or given directly
or indirectly for soliciting such exchange.

ITEM 5.  OTHER INFORMATION

Neal E.  Schmale  resigned as a director of Unocal  Corporation  effective as of
October 15, 1997.

ITEM 6.   EXHIBITS AND REPORTS ON FORM 8-K

          (a)  Exhibits:  The Exhibit  Index on page 23 of this report lists the
               exhibits that are filed as part of this report.

          (b)  Current Reports on Form 8-K

                 During the third quarter of 1997:

                 1. Report  dated and filed July 23,  1997,  for the  purpose of
                    reporting,  under Item 5, Unocal's  second quarter and first
                    six months of 1997 earnings and related information.

                 2. Report  dated  September  16, 1997 and filed  September  17,
                    1997,  for the purpose of  reporting,  under Item 5, certain
                    hydrocarbon discoveries offshore Indonesia.

                 During the fourth quarter of 1997 to the date hereof:

                 1. Report dated and filed October 14, 1997,  for the purpose of
                    reporting,  under Item 5,  Unocal's  intent to consider  the
                    restructuring of certain Canadian oil and gas assets held by
                    its Unocal Canada Limited, subsidiary.

                 2. Report dated and filed October 14, 1997,  for the purpose of
                    reporting,  under Item 5, the resignation of Neal E. Schmale
                    as Unocal's Chief  Financial  Officer and the appointment of
                    Timothy  H.  Ling  as  Chief  Financial  Officer,  effective
                    October 15, 1997.

                 3. Report  dated  October 14, 1997 and filed  October 15, 1997,
                    for the purpose of reporting, under Item 5, a jury's verdict
                    validating Unocal's reformulated gasoline patent.

                 4. Report dated and filed October 27, 1997,  for the purpose of
                    reporting,  under Item 5,  Unocal's  third quarter and first
                    nine months of 1997 earnings and related information.

                 5. Report  dated  November 3, 1997 and filed  November 4, 1997,
                    for the purpose of reporting,  under Item 5, damages awarded
                    to Unocal in the reformulated  gasoline patent  infringement
                    lawsuit.

                                       20


                                    SIGNATURE


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



                                     UNOCAL CORPORATION
                                        (Registrant)


Dated:   November  14, 1997          By:   /s/  JOSEPH A. HOUSEHOLDER
                                           --------------------------
                                            Joseph A. Householder
                                            Vice President, Tax and Comptroller
                                            (Duly Authorized Officer and
                                            Principal Accounting Officer)


                                       21




                                  EXHIBIT INDEX



               2.1  Sale and Purchase  Agreement for 76 Products Company,  dated
                    December 14, 1996,  between  Union Oil Company of California
                    and Tosco  Corporation  (without  attachments  or schedules)
                    (incorporated  by  reference  to  Exhibit  2.1  to  Unocal's
                    Current Report on Form 8-K dated December 16, 1996 and filed
                    January 3, 1997, File No. 1-8483).

               2.2  Stock  Purchase  and  Shareholder  Agreement,  dated  as  of
                    January 15, 1997, by and between Tosco Corporation and Union
                    Oil Company of California,  together with form of Supplement
                    No. 1 thereto  (incorporated  by reference to Exhibit 2.2 to
                    Unocal's  Current Report on Form 8-K dated December 16, 1996
                    and filed January 3, 1997, File No. 1-8483).

               2.3  Amendment No. 1 and Supplement,  dated as of March 31, 1997,
                    to Stock  Purchase and  Shareholder  Agreement,  dated as of
                    January 15, 1997, by and between Tosco Corporation and Union
                    Oil Company of  California  (incorporated  by  reference  to
                    Exhibit C to Unocal's and Union Oil Company of  California's
                    statement  on Schedule  13D  relating to Tosco  Corporation,
                    dated and filed April 10, 1997, File No. 1-7910).

               2.4  Environmental Agreement,  dated as of March 31, 1997, by and
                    between   Union  Oil   Company  of   California   and  Tosco
                    Corporation  (without schedules)  (incorporated by reference
                    to Exhibit 2.3 to Unocal's  Current Report on Form 8-K dated
                    December  16,  1996 and  filed  January  3,  1997,  File No.
                    1-8483).

               10   Termination and Employment  Agreement and Release among Neal
                    E.  Schmale,  Union Oil  Company  of  California  and Unocal
                    Corporation.

               11.1 Statement regarding computation of earnings per common share
                    assuming  no dilution  for the three  months and nine months
                    ended September 30, 1997 and 1996.

               11.2 Statement regarding computation of earnings per common share
                    assuming  full dilution for the three months and nine months
                    ended September 30, 1997 and 1996.

               12.1 Statement  regarding  computation  of ratio of  earnings  to
                    fixed charges of Unocal for the nine months ended  September
                    30, 1997 and 1996.

               12.2 Statement  regarding  computation  of ratio of  earnings  to
                    combined  fixed  charges and  preferred  stock  dividends of
                    Unocal for the nine  months  ended  September  30,  1997 and
                    1996.

               12.3 Statement  regarding  computation  of ratio of  earnings  to
                    fixed  charges of Union Oil  Company of  California  for the
                    nine months ended September 30, 1997 and 1996.

               27   Financial  data schedule for the period ended  September 30,
                    1997  (included  only  in the  copy  of  this  report  filed
                    electronically with the Commission).

                                       22