Chevron Corporation (NYSE:CVX) announced the successful appraisal of its Anchor discovery in the Lower Tertiary Wilcox Trend in the Gulf of Mexico.

“The positive results of our appraisal work at Anchor indicate a significant discovery of potentially hub class scale,” said Jay Johnson, executive vice president Upstream, of San Ramon-based Chevron.

The original Anchor discovery well, located in Green Canyon Block 807, approximately 140 miles off the coast of Louisiana in 5,180 feet of water, was drilled in late 2014 to a depth of 33,750 feet, encountering  690 feet of net oil pay.

Appraisal drilling began in June 2015 and recently found 694 feet of net oil pay. To date, Chevron has confirmed a hydrocarbon column of at least 1,800 feet (549 m) in the Lower Tertiary Wilcox reservoirs at Anchor.

Complete appraisal of the field will require further delineation wells and technical studies, the company said.

Chevron subsidiary Chevron U.S.A. Inc. is the operator of the Anchor Prospect, with a 55% working interest. Anchor co-owners are Cobalt International Energy, L.P., with 20%, Samson Offshore Anchor, LLC, 12.5%, and Venari Resources LLC, 12.5%.