press release

Unocal's 3Q 2004 earnings conference call set for Oct. 28

El Segundo, Calif., Oct. 18, 2004 -- Unocal Corporation (NYSE: UCL) will discuss its third quarter 2004 financial and operating results in a conference call webcast on Unocal's web site on Thursday, Oct. 28, 2004. The conference call will begin at 1 p.m. PDT (4 p.m. EDT).

Investors, analysts, news media, employees and the general public are invited to listen to the webcast by visiting the Unocal web site (www.unocal.com) and clicking on the conference call banner on the home page or by clicking on the "News and Presentations" link in the Investor Relations section of the Unocal web site. In addition, graphics of the slides (pdf format) referenced during the call will be available for viewing on-line or downloading from the investor relations section of the web site.

Replays of the audio conference call will be available through Dec. 3, 2004. Transcripts of the conference call and the graphic files will be archived.

Robert E. Wright, vice president of Investor Relations for Unocal, will be the conference call moderator. Charles R. Williamson, Unocal chairman and chief executive officer; Joseph H. Bryant, Unocal president and chief operating officer; and Terry G. Dallas, Unocal executive vice president and chief financial officer, will also participate in the call.

Unocal expects to issue a new release on its third quarter 2004 earnings results on Oct. 28 prior to the open of trading on the NYSE. This news release will be available on the Unocal web site and furnished with the Securities and Exchange Commission on Form 8-K.

About Unocal Corporation

Unocal is one of the world's leading independent natural gas and crude oil exploration and production companies. The company's principal oil and gas activities are in Asia and North America.

Updated: October 2004