Chevron won its hotly contested legal battle against rival Exxon Mobil, allowing it to immediately close its $53 billion acquisition of Hess on July 18 and give the Big Oil major access to arguably the biggest oil discovery of the century offshore of sparsely populated Guyana.

Chevron has scored a critical ruling in Paris that has given it the go-ahead for a $53 billion acquisition of Hess and access to one of the biggest oil finds of the decade.

Chevron completed its $53 billion acquisition of Hess on Friday, ending a legal battle with Exxon Mobil over offshore oil assets in Guyana. A ruling this week from an arbitration panel of the International Chamber of Commerce in Paris cleared the way for Chevron to tap Hess’s 30% stake of the Stabroek Block,