In Texas, ex-oil and gas workers champion geothermal energy as a replacement for fossil-fueled power plants

STARR COUNTY — In 2009, on a plot of shrub-covered cattle land about 45 miles northwest of McAllen, Shell buried and abandoned a well it drilled to look for gas. The well turned out to be a dry hole. Vegetation grew back over the site.

In 2021, a Houston-based energy company run by former Shell employees came looking for it.

This company wasn’t drilling for oil or gas, though. Its engineers were looking for a place to experiment with their technology for producing geothermal energy, created by Earth’s underground heat.

A startup called Sage Geosystems leased the site. The company installed a wellhead and brought in a diesel-powered pump. They used fluid to create cracks in the rock deep below the surface, a technique similar to fracking for oil and gas.

One day last March, the crew pumped 20,000 barrels of water into the 2-mile-deep well. Hours later, an operator opened the well from a control room. Pipes above ground shook as the pressurized water gushed back up. The water spun small turbines, generating electricity.

Texas Tribune

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