press release

Unocal to present at Merrill Lynch Global Energy Conference

El Segundo, Calif., Nov. 1, 2004 - Unocal Corporation (NYSE: UCL) today said that Charles R. Williamson, Unocal's chairman and chief executive officer, will present a company update at the Merrill Lynch Global Energy Conference on Nov. 3, 2004, at 10:05 am eastern time.

The presentation will include information concerning Unocal's recent financial and operating results and the outlook regarding certain exploration, development and production activities.

A live webcast of the presentation, along with slides (in pdf format for viewing on-line or downloading), will be available on Unocal's web site. Replays of the webcast will be available through Nov. 17, 2004. The slides will be archived.

Listeners can access the webcast and slides by clicking on the "News and Presentations" link in the Investor Relations section of the Unocal web site.

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: November 2004