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April 24, 2022 03:34 pm

Is Clean Energy Buried at the Bottom of Abandoned Oil Wells?

"The U.S. is spending millions to explore a surprising source of untapped power," reports Recode, describing a new pilot program from America's Department of Energy"Geothermal energy works on a simple premise: The Earth's core is hot, and by drilling even just a few miles underground, we can tap into that practically unlimited heat source to generate energy for our homes and businesses without creating nearly as many of the greenhouse gas emissions that come from burning fossil fuels. However, drilling doesn't come cheap — it accounts for half the cost of most geothermal energy projects — and requires specialized labor to map the subsurface, drill into the ground, and install the infrastructure needed to bring energy to the surface. But the US, in the wake of an oil and gas boom, just so happens to have millions of oil and gas wells sitting abandoned across the country. And oil and gas wells, it turns out, happen to share many of the same characteristics as geothermal wells — namely that they are deep holes in the ground, with pipes that can bring fluids up to the surface. So, the DOE asks, why not repurpose them? That's exactly what the agency's pilot program, called Wells of Opportunity: ReAmplify, aims to do, awarding a total of $8.4 million to four projects across the country that will each try to tap into some of those old wells to extract geothermal energy rather than gas or oil. If they work, they could be the key to not only reducing the country's use of planet-damaging fossil fuels, but also helping answer the question of how to transition many of the more than 125,000 people who work in oil and gas extraction across the country into clean-energy jobs.... [T]he next year or so will be spent on planning and assessing the feasibility of turning oil wells into geothermal resources, after which energy generation will slowly ramp up. The biggest question is just how scalable these ideas are: One megawatt is, after all, a pittance compared to the country's energy needs. "Some European countries already rely on direct use of geothermal energy on a large scale," the article points out. Volcanically-active Iceland, for example, "uses its vast reserves of geothermal energy to heat 90 percent of its homes." Thanks to Slashdot reader fahrbot-bot for submitting the story

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