EXHIBIT 23 CONSENT OF INDEPENDENT ACCOUNTANTS We consent to the incorporation by reference in the following Registration Statements of Unocal Corporation, Registration Statements on Form S-8 (Nos. 2- 93452, 33-43231, 33-41601 and 33-43232) and Registration Statement on Form S-3 (No. 33-38505-01) of our report, dated February 14, 1994, which appears on page 28 of this Annual Report on Form 10-K. /s/ COOPERS & LYBRAND COOPERS & LYBRAND Los Angeles, California March 30, 1994