Hess Corp., a partner in the Exxon Mobil Corp.-operated Stabroek Block offshore Guyana, said July 29 that “two additional high-quality reservoirs” were identified during appraisal drilling at the Yellowtail Field.

The reservoirs were located adjacent to and below the field, elevating hopes for a potential future development with resource quality similar to that of the play-opening Liza discovery. Drilled by the Stena Carron rig, the Yellowtail-2 well is one mile southeast of Yellowtail-1.

The find marks another successful milestone for partners on the block, where Hess and Exxon, working with CNOOC Ltd., have made 16 significant discoveries since 2015. More than an estimated 8 billion barrels of oil equivalent in gross recoverable resources have been discovered so far by the partnership.

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