The government policies enabled oil companies to do this. Free market would solve this problem over time. Over the last 10 years or so there has been a lot of consolidation of oil companies. The main reason was from Government regulations. The smaller companies could not afford to continue with the cost of regulations.
Here are some web sites of some domestic oil supplies from my previous post.
http://www.usgs.gov/newsroom/article.asp?ID=1911http://bakkenshale.net/bakkenshalemap.html>>Oil companies have been raping the consumers of the civilized world for decades. I want to reduce consumption, not just shift to a different pipe. Natural gas comes from the >>same companies and the same fields. No difference.