Norwegian energy giant Equinor is in the running for Chevron’s 40% interest in the Rosebank field, a news report said.
Chevron confirmed last week that it had received a bid from an unspecified oil company for the operated stake.
Analysts said majors with interests in the west of Shetland basin were candidates for the share.
But they disagreed whether private-equity companies would be able to finance an acquisition and pay for the subsequent field development.
Energy consultancy Wood Mackenzie said it would cost about £4.5 billion to develop Rosebank with an FPSO and up to 20 production wells.
“Two sources close to the process” told Reuters that Equinor was interested in acquiring Chevron’s stake in Rosebank, thought to be capable of producing 300 million barrels of oil.
Equinor declined to comment.