WASHINGTON, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

                     PURSUANT TO SECTION 13 OR 15(d) OF THE

                         SECURITIES EXCHANGE ACT OF 1934

        Date of Report (Date of earliest event reported): August 20, 2004

                               APACHE CORPORATION
               (Exact name of registrant as specified in Charter)

          DELAWARE                      1-4300                  41-0747868
(State or Other Jurisdiction         (Commission             (I.R.S. Employer
      of Incorporation)              File Number)         Identification Number)

                              ONE POST OAK CENTRAL
                             2000 POST OAK BOULEVARD
                                    SUITE 100
                            HOUSTON, TEXAS 77056-4400
                    (Address of Principal Executive Offices)

       Registrant's telephone number, including area code: (713) 296-6000



On August 20, 2004, Apache announced that it has signed a definitive agreement
to acquire all of Anadarko Petroleum Corporation's properties located on the
Outer Continental Shelf of the Gulf of Mexico for $537 million, effective as of
October 1, 2004. The acquisition includes 78 fields on 241 offshore blocks
(approximately 693,000 net acres), including 93 undeveloped blocks and 112
platforms. Apache will operate 53 of the fields with 80 percent of the
production and 85 percent of the net reserves. Apache will book proved reserves
of approximately 61 million barrels of oil equivalent (MMboe) of which 51
percent is natural gas.

Prior to the Apache transaction, Morgan Stanley Capital Group Inc. agreed to pay
Anadarko $775 million to acquire an overriding royalty interest in 24 MMboe of
lower-risk reserves estimated to be produced over the next four years. Apache
will record a $99 million liability to reflect the future cost of producing and
delivering the reserves to Morgan Stanley but will not book these reserves.
Apache will book the remaining reserves at a lower cost per barrel equivalent
and retains all of the potential upside from future exploration and development
activities. Apache's share of the acquired production is estimated to average 50
million cubic feet (MMcf) of natural gas and 3,000 barrels of liquid
hydrocarbons per day in the fourth quarter 2004.

Apache has hedged 70,000, 90,000 and 90,000 million Btu (MMBtu) of gas per day,
respectively, over the next three years. The hedges are in the form of costless
collars with floors of $6.00, $5.50 and $5.25 per MMbtu and ceilings of $6.78,
$6.66 and $6.20 per MMbtu. On the oil, Apache has costless collars on 6,000,
8,000 and 7,000 barrels per day, respectively through 2007, with floors of
$37.00, $34.00 and $33.00 per barrel and ceilings of $43.50, $41.50 and $39.25
per barrel.

The transaction is expected to close by the end of the third quarter 2004,
subject to Hart-Scott-Rodino review and normal post-closing adjustments.
Additionally, some of the properties are subject to preferential rights, which
may be exercised by third-party owners. The purchase is being funded with
commercial paper and cash on hand.


         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.

                                            APACHE CORPORATION

Date:  August 20, 2004                      By:  Roger B. Plank
                                                 Roger B. Plank
                                                 Executive Vice President and
                                                   Chief Financial Officer