Utah scientists find massive geothermal hotspot in west desert
Over the past two years, crews drilled nine wells in Utah's Black Rock Desert basin south of Delta to test out a theory that water at high temperatures might exist deep beneath the surface that would be hot enough to be turned into steam, which could then be used to generate electricity.
They hit pay dirt.
The agency has identified an approximately 100-square-mile area within the Black Rock Desert basin it believes could eventually support power plants that could conservatively produce hundreds of megawatts of electricity. A megawatt is enough energy to run the appliances in 750 homes.
Allis said the area is especially attractive for geothermal development because of the existing infrastructure. There is a large coal-fired power plant in the area, a 300-megawatt wind farm and a major electrical transmission line nearby that could be used to get the power to where it is needed.
Karl Gawell is president of the Geothermal Energy Association, which is part of the council. On Thursday he termed the Utah discovery "exciting" and predicted it would be generating a lot of talk and interest among companies that are developing geothermal resources. "It's exciting for Utah, too, because it could eventually generate a lot of jobs and economic growth."
"We're still in the exploration stage when it comes to finding new resources," Gawell said. "So this discovery just confirms what everyone in the industry already knows, that there is a lot of undiscovered potential out there."
Although environmentalists generally look upon geothermal projects as being worthwhile developments, Christopher Thomas of the Healthy Environmental Alliance of Utah (HEAL) said every undertaking needs to be thoroughly reviewed to make sure there are no adverse impacts.
Still, Thomas pointed out that Utah is seventh out of eight Western states when it comes to renewable energy production. "If we want to ensure continued economic prosperity . . . we've got to be looking at geothermal, wind and solar energy."
One potential drawback to the Utah site is the depth of the formation. Any company that wants to develop a power plant in the Black Rock Desert will have to bring water up from deep underground as much as 10,000 feet use it to generate electricity then inject it back underground for reheating.
Preliminary economic modeling suggests that a large geothermal plant could produce electricity for about 10 cents per kilowatt hour, Allis said. Although that cost is higher than the roughly 8 cents per kilowatt hour Utahns pay for their electricity it is well below the going rate of around 15 cents that consumers in California pay.
Four years ago, Blackett was looking at "bottom-hole temperatures" of oil wells that had been drilled in the state. One stood out. It was a well that had been drilled in the basin and abandoned by Arco in 1981. The oil company had reported a bottom-hole temperature of 450 degrees far hotter than the average of around 250 degrees that is common in Utah's western reaches.
"There are other potentially hot basins across [Utah and Nevada] that need to be investigated. "We have identified the Steptoe Valley and Mary's River-Toano basins in northeast Nevada as obvious geothermal targets."