Geothermal Energy Poised for Major Expansion as New Drilling Technologies Unlock Vast Underground Resources

Advances in enhanced geothermal systems could add up to 150 gigawatts of clean baseload power to the US grid

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By LineZotpaper

Published26 April 2026

Read Time3 min

The United States stands on the cusp of a geothermal energy revolution, with emerging drilling technologies borrowed from the oil and gas industry enabling access to heat resources deep underground that were previously unreachable, potentially unlocking up to 150 gigawatts of clean, reliable electricity generation capacity across the country.

For decades, geothermal energy has remained a niche power source confined to geologically active regions like Iceland, parts of California, and the western United States. Now, a convergence of technological innovation and policy interest is pushing the sector toward what proponents describe as a transformational moment.

At the heart of the potential breakthrough is enhanced geothermal systems (EGS) — a technology that fractures hot dry rock deep underground and circulates water through the cracks to capture heat, rather than relying on naturally occurring hydrothermal reservoirs. Because suitable hot rock exists beneath most of the continental United States, EGS could theoretically unlock geothermal power almost anywhere.

The key enabler has been directional drilling and hydraulic fracturing techniques refined by the shale oil and gas boom. Companies including Quaise Energy, Fervo Energy, and Sage Geosystems have been adapting these tools for geothermal applications, demonstrating that wells can be drilled faster, deeper, and more cost-effectively than was possible even five years ago.

Fervo Energy, which operates a pilot project in Utah in partnership with Google, reported in 2023 that it had successfully produced commercial-scale power from an EGS well — a milestone the geothermal industry had been chasing for decades. The company has since moved toward larger commercial deployments in Nevada.

The US Department of Energy has backed the sector through its Enhanced Geothermal Shot initiative, which aims to reduce the cost of EGS to $45 per megawatt-hour by 2035 — competitive with wind and solar. The DOE estimates the total geothermal resource base beneath the continental US could support more than 5,000 gigawatts of capacity, far exceeding current total US electricity generation.

The 150-gigawatt figure cited by industry advocates represents a more conservative, near-to-medium-term deployment scenario assuming continued cost reductions and supportive policy.

Unlike solar and wind, geothermal produces electricity around the clock regardless of weather, giving it a significant advantage as a baseload resource — particularly valuable as grids absorb more intermittent renewables. Proponents argue this characteristic makes geothermal a critical missing piece of a fully decarbonised electricity system.

Challenges remain, however. EGS projects are capital-intensive upfront, drilling risks are significant, and the technology has yet to be proven at large commercial scale. Some geologists also raise concerns about induced seismicity — small earthquakes triggered by the injection of water underground — which have affected several geothermal and fracking projects in the past.

Permitting processes on federal lands, which cover much of the geothermally rich western United States, have historically been slow, though the Biden administration moved to streamline approvals, and the Trump administration has shown interest in domestic energy development across multiple fuel sources.

Investment in geothermal startups has accelerated, with venture capital and project finance flowing into the sector at record levels in recent years. Industry advocates say the next two to three years of commercial-scale demonstration projects will be decisive in determining whether enhanced geothermal can scale to fulfil its considerable promise.

Analysis

Why This Matters

Enhanced geothermal systems, if commercially proven at scale, could provide always-on clean electricity anywhere in the US — directly addressing one of the central weaknesses of solar and wind: intermittency.
A 150-gigawatt buildout would represent roughly 15% of current US electricity capacity added from a single, largely untapped domestic resource, with significant implications for energy security, grid reliability, and climate targets.
The sector's trajectory over the next two to three years — through commercial-scale project results and federal policy decisions — will determine whether geothermal becomes a mainstream energy pillar or remains a promising niche.

Background

Geothermal power has been used commercially in the United States since the 1960s, when The Geysers plant in California came online. For most of that period, however, the industry was constrained by geography: conventional geothermal only works where hot water or steam naturally reaches near the surface, limiting viable sites to the western US and a handful of other locations globally.

The concept of enhanced geothermal systems — essentially creating artificial underground reservoirs in hot dry rock — dates to experiments at Fenton Hill, New Mexico, in the 1970s. Those early efforts were largely unsuccessful due to the limitations of available drilling technology and the high cost of the work. The idea lay largely dormant for decades.

The shale revolution of the 2000s and 2010s transformed oil and gas drilling through advances in horizontal drilling and hydraulic fracturing. By the late 2010s, geothermal entrepreneurs began recognising that these same techniques could be applied underground to access heat rather than hydrocarbons. The DOE formalised its ambitions for the sector with the Enhanced Geothermal Shot programme in 2022, modelling it on the successful Solar and Wind Shot cost-reduction initiatives.

Key Perspectives

Geothermal developers and investors: Companies like Fervo Energy argue that EGS is now where shale was in the early 2000s — technically proven in principle and on the verge of rapid cost reduction through scale and iteration. They point to successful pilots and growing corporate interest (including from large technology companies seeking 24/7 clean power for data centres) as evidence the market is ready.

Grid planners and utilities: Many see geothermal's baseload characteristics as uniquely valuable in a grid increasingly dominated by variable renewables. Regulators and system operators in western states have begun factoring expanded geothermal into long-range resource planning, though most remain cautious about projections until commercial-scale results are in hand.

Critics and sceptics: Some energy analysts caution that EGS has repeatedly promised more than it has delivered. Drilling costs remain high, induced seismicity is a genuine risk that has triggered community opposition and project cancellations in Europe, and no EGS project has yet operated at utility scale for an extended period. They argue 150-gigawatt projections depend on cost and performance assumptions that have not yet been validated at scale.

What to Watch

Fervo Energy's Nevada commercial project performance data, expected over the next 12–24 months, will serve as a critical proof point for the industry's cost and reliability claims.
Federal permitting timelines on Bureau of Land Management and Forest Service lands, where many of the best geothermal resources sit, will determine how quickly projects can advance.
Whether large technology companies — already purchasing geothermal power purchase agreements for data centre loads — expand these commitments, signalling confidence in the sector's commercial viability.

Sources

America's Geothermal Breakthrough Could Unlock a 150-Gigawatt Energy Revolution — Hacker News