Shell has lifted the lid on what the Anglo-Dutch supermajor said is a “significant” discovery at its Leopard prospect in the ultra-deepwater US Gulf of Mexico.

The Leopard well, located around 394 kilometres (245 miles) south-southeast of Houston, Texas, hit more than 183 metres (600 feet) of net oil pay at multiple levels.

No early resource estimate was given, however.

Further evaluation of the discovery is under way to determine future development options, Shell — which is partnered at the well in the Perdido Corridor by US supermajor Chevron — said on Tuesday.