The plethora of oil and natural gas discoveries in the rich Perdido thrust belt of the deepwater Gulf of Mexico (GOM) has yielded yet another discovery for Royal Dutch Shell plc.

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Houston-based Shell Offshore Inc. made a “material discovery at the Blacktip North prospect” in U.S. waters. The well encountered about 300 feet net oil pay “at multiple levels.” An evaluation is underway to define the development options.

“The Blacktip North prospect is the latest example of discovering new resources in our advantaged corridors,” said Shell’s Paul Goodfellow, executive vice president of Deep Water. “Our strategic positions, like the Perdido Corridor, are at the heart of value creation in the Gulf of Mexico, and they represent an opportunity to use our existing infrastructure...