Chevron warned investors that Exxon and Cnooc are asserting they have a right to pre-empt the company's bid for a stake in an oil project off Guyana, something that could derail Chevron's megadeal for Hess.

Chevron warned investors that Exxon and Cnooc are asserting they have a right to pre-empt the company’s bid for a stake in an oil project off Guyana, something that could derail Chevron’s megadeal for Hess.