They occur in nearly any complex environment and may be acting as source rock, reservoir or cap rock.

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"When I started, geologists were considered heretics for dreaming that there could be salt canopies with reservoir-quality rock beneath them, " says Issen, 54.

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At Goliad the uranium ore is located just 400 feet deep within the same rock as a groundwater reservoir that ranchers tap for drinking water, both for themselves and their livestock.

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Operated by Anadarko with 30%, that well was another monster, going down more than 31, 000 feet in 5, 800 feet of water, and discovering a remarkable 1, 000 feet of oil-bearing rock with very promising reservoir properties.

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The carbon dioxide, injected deep into the reservoir, basically scours the oil out of the rock and pushes it upward where it can flow into a well.

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To begin with, the vertical depth separation between drinking water aquifers and reservoir targets for gas production is several thousand feet of impermeable rock.

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In Wyoming's Sweetwater County, gusts up to 71 mph damaged a marina at Flaming Gorge Reservoir and broke windows at the Western Wyoming Community College in Rock Springs, according to the National Weather Service.

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As the average untapped oil reservoir is to be found in ever smaller, deeper and tighter rock, service companies have come up with ever more innovations.

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But operations were later suspended after a rock fall in a tunnel carrying water to the facility from a reservoir.

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