The significant oil strike has operators combing their inventories for similar opportunities to the California-based explorer's apparent multi-hundred-million barrel find. Oil companies are fawning over the success to date in the Eocene (or lower tertiary) play, which also includes BHP-Billiton's Cascade and Chinook discoveries.

"What makes us excited about this is not just the St Malo itself, but the regional setting," said Devon Energy boss Larry Nichols.

"While