The U.S. Department of Energy is putting new funding behind geothermal energy development, announcing a $14 million project focused on testing enhanced geothermal systems, or EGS, in Pennsylvania.

The effort, led by the Pennsylvania Department of Environmental Protection, will take place in the Appalachian Utica Shale and is designed to evaluate whether geothermal energy can be scaled more effectively in the eastern United States. While geothermal has traditionally been concentrated in the western part of the country, where natural conditions are more favorable, this project is exploring whether existing oil and gas infrastructure can help unlock similar potential elsewhere.

At its core, the project is a field test. It will examine how EGS technology performs in a region not typically associated with geothermal energy production. If successful, it could provide a roadmap for expanding geothermal into new areas using infrastructure that already exists.

Unlike conventional geothermal systems, which rely on naturally occurring underground reservoirs of hot water or steam, EGS works by creating those conditions artificially. Heat exists beneath the Earth’s surface nearly everywhere, but in many places, there is not enough permeability or fluid flow to access it efficiently. EGS addresses that limitation by engineering subsurface reservoirs - essentially creating pathways that allow fluid to circulate through hot rock formations and bring that heat back to the surface.

That’s where the Pennsylvania project comes in. One of its central components will involve converting an existing horizontal shale gas well into a geothermal well. Researchers will evaluate different well orientations and placements, as well as test techniques to create the fractures needed to enable fluid movement underground. These fractures are a critical part of EGS systems, allowing water to flow through hot rock, absorb heat, and return to the surface as usable energy.

The approach reflects a growing interest in repurposing oil and gas assets for geothermal development. By leveraging existing wells and infrastructure, developers may be able to reduce costs and speed up deployment compared to building entirely new systems from scratch.

The project is part of a broader initiative within the Department of Energy’s Hydrocarbons and Geothermal Energy Office to advance EGS technology. Specifically, it represents a second-round selection under the office’s EGS Pilot Demonstrations program, which supports real-world testing across different geologic settings.

Demonstration projects like this are seen as a key step in moving geothermal energy forward. While the concept of EGS has been studied for years, large-scale deployment depends on better understanding how these engineered systems perform under varying conditions. That includes how reservoirs respond over time, how efficiently heat can be extracted, and what design approaches work best in different types of rock formations.

The Appalachian Basin presents a unique testing ground. Known primarily for its oil and gas production, the region also contains significant thermal resources that have not been widely tapped for energy generation. By focusing on this area, the project aims to determine whether geothermal could become a viable addition to the region’s energy mix.

If the demonstration proves successful, the implications could extend well beyond Pennsylvania. A repeatable model for converting existing wells into geothermal assets could open the door for similar projects across the country, particularly in regions with extensive oil and gas infrastructure.

At the same time, the project highlights a broader shift in how geothermal energy is being approached. Rather than relying solely on naturally ideal conditions, researchers and developers are increasingly looking at ways to engineer solutions that make geothermal viable in a wider range of locations.

The timeline and long-term outcomes of the Pennsylvania demonstration remain to be seen, but the funding signals continued federal interest in geothermal as part of the evolving U.S. energy landscape.

Why this matters

Geothermal energy has long been seen as a reliable, low-emission power source, but its growth has been limited by geography. If enhanced geothermal systems can be proven at scale - especially in regions like the eastern U.S. - it could significantly expand where geothermal power is viable.

This project also taps into an existing advantage: thousands of oil and gas wells that could potentially be repurposed. That could lower costs, reduce the need for new drilling, and give legacy energy regions a pathway into newer energy markets.