BP discovered Mad Dog in 1998 and began producing the deep-water Gulf of Mexico field with a spar in 2005. Current estimates of oil in place are 5 billion barrels.

“It’s a world-class field by any kind of measure,” says Bill Steel, Mad Dog 2 project general manager. “Overall, Mad Dog is a good news story. The more we drilled the field, the more we appraised the reservoir, the more oil we found.”