As far as I know, the facts I wrote way back in 2000, when the shrub first took to the scene, still hold true: click here. One of the most important points being:

During the Reagan administration, the Department of Interior found there was a chance of less than one in five of ever finding recoverable oil in the ANWR. If oil companies beat those odds and strike pay dirt, both the Department of Energy and the U.S. Geological Survey have said it would most likely amount to a mere 3.2 million barrels, which would only last a few months in meeting the needs of American consumers. It would also take about ten years to even hit the market. Ninety-five percent of Alaska's North Slope is available for oil exploration. Oil companies expect to step up their production on the North Slope with forecasted increases of 15-17%, all without opening any of the Arctic National Wildlife Refuge. © Oobraughloo Press