CNOOC has hired JPMorgan to advise it on a potential exit from its interests in U.S. shale gas assets, which could raise around $2 billion, the sources familiar with the matter said.
The sources cautioned that a sale was not guaranteed, and CNOOC could still retain these interests if it did not receive suitable offers or political situations changed swiftly.
In the Eagle Ford basin of south Texas, CNOOC's stake is in oil and gas assets owned by U.S. shale driller Chesapeake Energy Corp (CHK.O).
While Chesapeake has itself put those assets up for sale, any decision there is not expected to impact CNOOC's plans, one of the sources said.
Norway's Equinor (EQNR.OL) is said to be considering buying the stakes in a deal valued between 20 billion and 30 billion Norwegian crowns ($2-3 billion).