Daily crude output from the three largest US basins may fall as much as 700,000 barrels over the next year, according to Harold Hamm, chief executive officer of Continental Resources Inc. [NEW YORK] Daily crude output from the three largest US basins may fall as much as 700,000 barrels over the next year, according to Harold Hamm, chief executive officer of Continental Resources Inc. Producers including Continental, owner of the most acreage in North Dakota's Bakken Shale, have cut drilling to save costs after oil prices plummeted, Mr Hamm said Tuesday on CNBC. Output has begun to decline, which will lead to higher prices, he said.