Last year, Texas regulators approved 15 pilot projects that will turn idle oil wells into geothermal power sources. These aren’t just plug-and-play systems—engineers are retrofitting the wells with closed-loop heat exchangers to pull geothermal energy without touching the old oil infrastructure. The state estimates this approach cuts drilling costs by 40% compared to starting from scratch. North Dakota followed suit in June, greenlighting 12 geothermal pilot sites across the Bakken formation, where depleted shale wells will feed district heating systems for nearby towns. Both states bet big on reusing existing wells because the alternative—plugging and abandoning them—costs billions and still leaks methane for decades.

How it works: from oil holes to energy hubs

The trick is simple in theory but tricky in practice. Most abandoned wells were drilled 50–100 feet deep, but geothermal projects need 200–500 feet of access to steady underground heat. So crews widen the lower sections of the wells, insert steel pipes, and circulate a fluid that absorbs heat from the earth. The fluid travels up, transfers its heat to a secondary loop, and powers turbines or directly heats buildings. In Texas, one pilot in the Permian Basin will power a small oilfield worker camp while cutting its diesel generator use by 70%. The EPA just approved $35 million in grants for 24 states to replicate these projects, prioritizing wells near communities that suffer from both energy poverty and pollution.

The math that makes reuse worth it

Plugging a single abandoned well costs $50,000–$150,000, but those plugged wells still leak about 0.2% of their original methane over 20 years—a slow bleed of a potent greenhouse gas. By contrast, a geothermal conversion costs $200,000–$400,000 but generates power for 20–30 years with no additional emissions. North Dakota’s energy regulator, the North Dakota Industrial Commission, calculated that each reused well will offset 1,800 tons of CO₂ annually—roughly the emissions of 400 cars. The EPA’s new grants will cover up to 80% of conversion costs in low-income areas, making the math pencil out even faster.

Not every well is a good candidate

The catch? Not all 2 million abandoned wells in the US are suitable. Wells deeper than 5,000 feet often have temperatures too high for standard geothermal systems without expensive upgrades. Shallow, high-flow wells near population centers are the sweet spot. That’s why Texas focused on the Permian Basin’s shallower wells and North Dakota targeted the Bakken’s medium-depth sites. Engineers also avoid wells with corroded casings, which could leak fluids into aquifers. The Groundwater Protection Council estimates only 15–20% of abandoned wells in the US meet reuse criteria, but that still leaves 300,000–400,000 viable candidates.

The companies leading the charge

Startups like Eavor and Fervo Energy are racing to scale these projects. Eavor’s closed-loop system in Texas’ Spraberry Trend now supplies 5 MW of baseload power—enough for 4,000 homes. Fervo, backed by $138 million from Google, is drilling twin horizontal wells in Nevada to test if the technique works in hotter, drier regions. Meanwhile, oil majors like Chevron are quietly funding pilots to offset their own methane liabilities. The industry’s pivot isn’t just about PR—it’s a bet that repurposing wells will become a billion-dollar market by 2030.

What comes next: regulations, risks, and reality

The biggest hurdle isn’t technology—it’s regulation. State oil and gas commissions are rewriting rules to allow geothermal reuse while keeping old wells plugged properly. In Oklahoma, regulators delayed a pilot project for 18 months over fears that heat exchangers could crack well casings. The U.S. Department of Energy is now funding studies on long-term integrity of reused wells. Meanwhile, environmental groups warn that without strict oversight, conversions could become another form of greenwashing if companies just use old wells as excuses to keep drilling elsewhere. For now, the focus is on small-scale pilots, but if the math holds, thousands of idle wells could start generating power within five years.

What You Need to Know

  • Source: Wired
  • Published: May 16, 2026 at 11:00 UTC
  • Category: Technology
  • Topics: #wired · #tech · #science · #biology · #genetics · #old-oil

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Curated by GlobalBR News · May 16, 2026

🇧🇷 Resumo em Português

O Brasil, que ainda enfrenta desafios com a transição energética, pode aprender com iniciativas inovadoras como a dos Estados Unidos, onde estados como Texas e Dakota do Norte estão transformando poços de petróleo abandonados em fontes de energia limpa. A estratégia, que reaproveita estruturas já existentes para projetos de geotermia ou energia geotérmica potencializada, não só reduz custos de desativação, como também impulsiona a geração de eletricidade renovável com baixo impacto ambiental.

No Brasil, onde a exploração de petróleo e gás é estratégica para a economia, mas também gera passivos ambientais, a ideia ganha relevância. Embora o país ainda dependa fortemente de fontes fósseis, o crescente debate sobre descarbonização e a busca por alternativas sustentáveis poderiam inspirar soluções semelhantes. Além disso, o reaproveitamento de poços desativados poderia ser uma forma de aliar recuperação de áreas degradadas à geração de energia limpa, um tema cada vez mais urgente em um cenário de mudanças climáticas.

A próxima fronteira pode ser justamente essa: transformar passivos ambientais em oportunidades energéticas, um movimento que já começa a ganhar tração em países com matrizes fósseis consolidadas.

🇪🇸 Resumen en Español

Las autoridades de estados clave como Texas y Dakota del Norte están transformando pozos petroleros abandonados en fuentes de energía limpia, demostrando cómo la innovación puede resucitar infraestructuras obsoletas. Esta estrategia, que combina geotermia y otras tecnologías renovables, no solo reduce costes de descontaminación sino que abre una vía para diversificar la matriz energética con recursos ya existentes.

El proyecto adquiere especial relevancia en el contexto hispano, donde países como México, Argentina o Colombia —con histórica dependencia de combustibles fósiles— podrían replicar este modelo. La reutilización de pozos abandonados no solo evita la emisión de gases contaminantes asociados a su abandono, sino que impulsa economías locales con energía sostenible y de bajo costo. Además, alinearía sus políticas con los objetivos climáticos globales, ofreciendo un ejemplo tangible de transición justa para comunidades afectadas por el declive de la industria tradicional.