Big oil companies moving into U.S. shale country

Big Oil is muscling in on shale country. Exxon Mobil Corp., Royal Dutch Shell Plc and Chevron Corp., are jumping into American shale with gusto, planning to spend a combined $10 billion this year, up from next to nothing only a few years ago. The giants are gaining a foothold in West Texas with such projects as Bongo 76-43, a well which is being drilled 10,000 feet beneath the table-flat, sage-scented desert, and which then extends horizontally for a mile, blasting through rock to capture light crude from the sprawling Permian Basin.-- More...