Texas Geothermal Energy

Overview

Texas Hosts the Developers and the Drillers but Little Geothermal Power

Next-generation geothermal uses oilfield drilling and fracturing to reach hot rock without a natural hot-water reservoir. Enhanced geothermal systems (EGS) fracture rock between wells; closed-loop systems circulate fluid through sealed pipe. Both target firm, around-the-clock power, the profile AI data centers and fabs ask for.

Sage Geosystems' plant at Christine, built with San Miguel Electric Cooperative (SMECI), sold its first electricity in Q2 2026 and had been grid-connected more than 120 days by August 2026. It is a 3 MW pilot in the South Load Zone of ERCOT (Electric Reliability Council of Texas). Everything else in Texas is a pilot under development, a military study or a term sheet.

The large geothermal contracts sit outside Texas. Fervo declared commercial operation of its first 33 MW block at Cape Station in Beaver County, Utah, on September 30, 2026, part of a 100 MW first phase; Google agreed to buy 115 MW from Fervo's Corsac Station in Nevada; Meta and XGS Energy plan 150 MW on the PNM grid in New Mexico by 2030. Meta's 150 MW agreement with Sage, signed in August 2024, names only a site east of the Rocky Mountains, and Sage's first commercial plant is Project Vector at Ormat's Blue Mountain plant in Nevada, with full production expected in 2028.

At an ERCOT board committee briefing in September 2025, Texas Geothermal Energy Alliance chairman Barry Smitherman placed shallow hot rock along the Eagle Ford trend from the Rio Grande Valley to San Antonio and along the Gulf Coast near Corpus Christi and Houston, where most Texas load sits. China runs geothermal mainly as heat: Sinopec reported 126 million square meters of geothermal heating serving more than 1.2 million households in 70 cities in November 2025.

Delivery models

Wells at the Load and Wells Feeding the Grid Both Have Texas Examples

Behind-the-meter (BTM) geothermal puts the wells on or beside the campus and serves the load directly, with the grid as backup or not at all; see Behind-the-Meter Power. Grid-delivered geothermal puts the wells where heat, land and permits are best, and power moves over ERCOT to a load under a power purchase agreement (PPA), subject to ERCOT large load interconnection rules.

In Texas the at-the-load examples are military: the Department of Defense geothermal program, launched in September 2023, put Eavor at Joint Base San Antonio and Sage at Fort Bliss, and funded a Sage power demonstration at its Starr County well aimed at Ellington Field. The grid examples are the Sage at Christine plant, the Austin Energy pilot and the Presidio plan. No Texas data center has announced on-site geothermal power; Bedrock Energy's Penn Field borefield in Austin supplies heating and cooling, not electricity.

Companies

Houston Developers Build Their First Large Plants Outside Texas

Fervo Energy, founded in 2017 by Tim Latimer, filed for its IPO in April 2026 and lists on Nasdaq. Sage Geosystems, founded in 2020 by oil and gas veterans, closed a $97 million Series B co-led by Ormat Technologies and Carbon Direct Capital. Quaise Energy, headquartered in Houston, uses millimeter-wave energy from gyrotrons to vaporize rock; in 2025 it tested on a Nabors rig and drilled 118 meters at a central Texas granite quarry, with a target of one kilometer in 2026.

Policy

The Railroad Commission Permits Geothermal Wells and 2025 Laws Opened State Financing

SB 785 (2023) settled that geothermal energy belongs to the surface landowner; it became law without the governor's signature on June 18, 2023. SB 786 (2023) moved closed-loop geothermal injection wells from the Texas Commission on Environmental Quality (TCEQ) to the Railroad Commission of Texas (RRC), which regulates the oil and gas wells the industry drills alongside. The RRC adopted Chapter 6 rules for shallow closed-loop wells with permit by rule in 2025; rules for deep geothermal wells were expected in 2026.

The 2025 session made geothermal eligible for the Texas Energy Fund (TEF) as dispatchable generation. SB 1762 states that a geothermal energy conservation well is not a battery energy storage resource. SB 879 exempts closed-loop wells from RRC drilling fees and organization reports, effective September 1, 2025. HB 4370 lets cities and districts bond-finance geothermal water conveyance projects as public improvements. HB 3240, a Geothermal Energy Council, did not pass.

Federal support held. The One Big Beautiful Bill Act (OBBBA), signed July 4, 2025, kept the 45Y and 48E clean electricity credits for geothermal projects that begin construction by the end of 2033, while cutting wind and solar timelines. The Department of Energy (DOE) Enhanced Geothermal Shot, launched in September 2022, targets $45 per megawatt-hour by 2035, a 90 percent cost cut. University of Texas research runs through the Bureau of Economic Geology, whose Presidio County resource assessment appeared in the AAPG Bulletin in September 2025, and the 2023 report The Future of Geothermal in Texas, written with Project InnerSpace. Bob Metcalfe, Ethernet inventor and UT Austin emeritus professor, sat on the leadership team of UT's Geothermal Entrepreneurship Organization and favors deep closed-loop designs.

Oil and gas link

Oilfield Rigs, Wells and Crews Carry Over to Geothermal

Geothermal wells use the same rigs, bits, casing and fracturing crews as Permian and Eagle Ford shale wells; see Permian Basin Energy. The January 2023 Future of Geothermal in Texas report estimated that oil and gas technology could cut geothermal costs 20 to 43 percent, and nearly 70 percent of oil and gas entities surveyed saw no geothermal technical problem the industry could not solve.

Nabors Industries invested in Sage Geosystems, Quaise Energy, GA Drilling and GeoX, and its Pace-X rig drilled for Sage in South Texas. In May 2026 Helmerich & Payne (H&P) and Baker Hughes agreed to put a dedicated geothermal land rig to work later in 2026. TxGEA backers at launch included Baker Hughes, Chevron, Halliburton, Nabors, NOV, Repsol and SLB's GeothermEx.

The Gulf Coast geopressured zone, hot brine under high pressure with dissolved methane, was tested before: DOE's Pleasant Bayou well in Brazoria County ran a 1 MW hybrid gas and heat plant from November 1989 to May 1990 and produced 3,445 MWh. Old wells help less than expected; UT drilling engineer Eric van Oort noted that deepening or reusing oil wells depends on hole size and casing. Presidio found its few wells came up dry and paid for a Bureau of Economic Geology study to pick drilling sites in the Rio Grande rift; see Trans-Pecos Nexus.

Related coverage

Related Coverage

• Texas Energy Nexus
• Behind-the-Meter Power
• ERCOT Large Load Interconnection
• Permian Basin Energy
• Water and Cooling
• Brownfield Inheritance