BRITISH TO CHECK TENGIZ DEAL

A visit to London by Nursultan Nazarbayev, president of the Soviet republic of Kazakhstan, has resulted in an agreement whereby unidentified "British experts" will help analyze the proposed contract for development of supergiant Tengiz oil field by Chevron Corp., the Moscow newspaper Kommersant reported. Signed in June 1990, the pact has sparked a controversy in the U.S.S.R. amid charges that it provides unfair advantages for Chevron (OGJ, Aug. 5, p. 14). Nazarbayev also met with officials of