Oil and natural gas explorer Bonanza Creek Energy (BCEI) is focused primarily on the Niobrara Shale in Wattenberg Field, Colo. Niobrara is mostly an oil play. It's considered to be in its early stages and big. How big? Business intelligence provider GlobalData says Niobrara Shale will make Colorado a major oil producer. About 93% of Bonanza Creek's revenue is from oil and liquids. The company has hedged about 60% of current oil production at $90 a