COWI and Sinotech Team Up on Taiwan’s Super-Hot Geothermal Potential Taiwan’s geothermal story is moving from possibility to execution, and the COWI-Sinotech collaboration is a sign that the sector is entering a more serious phase of development. The partnership is focused on unlocking super-hot geothermal resources, which could improve project economics and expand the country’s clean-energy options. Introduction Geothermal has long been one of Taiwan’s most intriguing renewable resources because the island sits on active tectonic terrain with strong heat potential. What has held the sector back is not a lack of heat, but the difficulty of converting that heat into bankable projects at scale. The new collaboration between COWI and Sinotech points to a more technical, internationally connected approach to solving that problem. Why Taiwan Matters Taiwan has ambitious decarbonization goals, and geothermal fits neatly into the need for firm, low-carbon power. Unlike solar and wind, geother...
Texas Geothermal Energy Growth: RRC Permits, Geopressured Storage, and Shallow Well Expansion in 2026
Geothermal Energy Gains Ground in Texas Under RRC Leadership
Texas is better known for oil and gas, but over the last three years the state has rapidly expanded its geothermal footprint under the regulatory oversight of the Railroad Commission of Texas (RRC). From permitting deep geopressured wells for long-duration energy storage to a surge in shallow closed-loop ground-source systems used for heating and cooling, geothermal technologies are moving from pilot projects into commercial-scale development. The RRC’s transfer of geothermal jurisdiction from the Texas Commission on Environmental Quality (TCEQ) in September 2023, combined with carefully calibrated rules and a permissive permitting pathway, have helped accelerate deployment while preserving environmental and safety safeguards.
This article examines the technical and regulatory developments that underpin the growth of geothermal energy in Texas, assesses commercial opportunities and constraints, and outlines the outlook for geopressured and shallow geothermal systems across the state.
What the RRC transition changed
When the RRC assumed statutory responsibility for geothermal well regulation in late 2023, it brought decades of subsurface regulatory experience rooted in oil and gas oversight. That institutional capacity matters for geothermal in three ways:
- Regulatory consistency: The RRC applied existing frameworks for injection, well construction, and subsurface stewardship, reducing uncertainty for developers familiar with oil and gas rules.
- Technical expertise: RRC staff have depth in drilling, well integrity, reservoir pressure management, and seismic risk assessment—skills directly transferable to geothermal projects.
Permitting efficiency: A clarified shallow geothermal rule removed ambiguity around jurisdiction and activity thresholds, streamlining permitting without increasing fees or significant staffing.
The RRC’s approach has been deliberate. Rather than a rapid deregulation push, the Commission has focused on clear guidance, incremental permitting, and monitoring that aligns with Texas’ broader energy and environmental objectives.
Deep geopressured geothermal: permits, projects, and significance
A geopressured geothermal reservoir is a subsurface formation that contains hot brine under high pressure and often significant dissolved methane. These formations offer three revenue streams: thermal energy, flowback water (which may contain minerals), and potentially natural gas. Geopressured systems are of particular interest because they can provide large-scale, baseload-capable thermal energy and long-duration thermal energy storage,attributes that complement intermittent wind and solar generation.
Key recent milestones in Texas:
February 2025: RRC issued its first deep geopressured permit to Sage Geosystems for a project in Atascosa County. The project is designed to support energy storage for San Miguel Electric Cooperative.
- 2026: RRC issued a second deep geopressured permit to Quidnet Energy Deployment LLC for a well in Galveston County. The Quidnet permit is notable for its focus on using geopressured resource characteristics for energy storage operations.
Why these permits matter:
Demonstration of regulatory readiness: Approving deep geopressured permits signals the RRC’s willingness to authorize complex, high-value subsurface projects under existing regulatory constructs.
- Enabling long-duration storage: Geopressured wells can store thermal energy for extended periods, providing seasonal balancing potential and a firming resource for grids dominated by renewables.
- Cross-sector expertise reuse: The oil-and-gas-aligned regulatory staff and monitoring techniques reduce the lead time and risk for developers leveraging petroleum-era skills for geothermal systems.
Shallow closed-loop geothermal: scale and applications
Shallow closed-loop ground-source heat pump (GSHP) systems use buried piping to exchange heat with the relatively stable near-surface ground for building heating and cooling. These systems are mature, efficient, and increasingly attractive for institutions looking to cut operating costs and carbon emissions.
Recent deployment trends in Texas:
Fiscal years 2024–2025: Approximately 1,400 shallow geothermal wells completed each year across Texas.
- Current fiscal year (as of mid-2026): 3,162 wells drilled and completed at 39 sites statewide, a rapid increase over previous years.
Drivers for growth:
- Operational savings: GSHPs significantly reduce building energy consumption for HVAC compared with conventional systems, especially where electric rates are favorable.
- Institutional adoption: Independent school districts and public institutions in Texas are increasingly deploying shallow systems to reduce life-cycle costs and carbon footprints.
- Regulatory clarity: The RRC’s shallow geothermal rule clarified responsibilities without adding permitting fees, creating a low-friction pathway for deployment.
Technical considerations:
- Site suitability: Thermal conductivity, groundwater recharge, and land availability determine ground-loop design and spacing.
- Design types: Vertical closed-loop boreholes are common where land is limited; horizontal loops are lower-cost but need more land.
- O&M: Proper grouting, loop material selection, and monitoring minimize leakage risk and maintain performance over decades.
Regulatory mechanics: permits, monitoring, and risk controls
The RRC’s geothermal permitting pathway is effectively an adaptation of established oil-and-gas permitting tools, but tailored to geothermal’s specific risks:
- Well construction standards: Cementing, casing string design, and blowout prevention standards prevent crossflow and protect freshwater zones.
- Injection and storage permitting: For geopressured projects and thermal energy storage, injection permits include pressure limits, monitoring requirements, and contingency plans.
- Environmental protection: Surface and groundwater protections, produced-water management, and disposal options are specified in permits.
- Seismicity mitigation: For projects involving high-pressure injection, seismic monitoring and traffic-light systems (thresholds requiring action when seismicity rises) may be required.
Examples of permit conditions:
Baseline seismic and groundwater monitoring before operations begin.
- Maximum permitted injection pressures and rates tied to fracture gradients.
- Contingency response plans and shut-in thresholds if monitoring triggers occur.
These conditions aim to allow innovative geothermal uses while mitigating the most significant environmental and safety risks.
Market economics and financing pathways
Geothermal economics in Texas diverge by technology class:
Shallow GSHPs: Economics are largely driven by HVAC energy savings, incentives, and lifecycle cost analysis. Public buildings and schools often finance installations through energy performance contracts, tax-exempt municipal leases, or state grant programs.
Deep geopressured and storage projects: These require higher capital but offer value through capacity, long-duration storage, and integration services (firming, capacity markets, ancillary services). Revenue stacks may include power sales, storage payments, grid services, and potentially mineral/produced-water value streams.
Financing considerations:
Risk allocation: Developers and investors place high value on regulatory certainty and subsurface characterization. RRC’s clear permitting reduces policy risk but exploration and resource risk remain.
- Contracting: Long-term offtake agreements—either for delivered heat, capacity, or storage services—will underpin bankability.
- Public-private models: Cooperatives and municipal utilities (e.g., San Miguel Electric Cooperative) partnering with private developers provide a model for distributed storage and resilience.
Policy incentives and market signals:
- Electrification and decarbonization targets in Texas and at the federal level favor low-carbon firming and thermal solutions.
- Interconnection and market rules that value long-duration storage and dispatchable capacity will increase the revenue potential for deep geothermal storage projects.
Technical challenges and knowledge gaps
Even with favorable permitting, several technical hurdles remain for geothermal scale-up in Texas:
Resource characterization: Geopressured reservoirs vary in temperature, permeability, and gas content. High-resolution seismic, well logging, and reservoir modeling are needed to reduce exploration risk.
- Well costs: Deep drilling in geopressured plays can mirror oil and gas well costs; cost reductions require drilling optimizations and learning curves.
- Produced fluids handling: Geopressured brines often contain salts and dissolved hydrocarbons; produced-water treatment, corrosion management, and disposal are engineering and economic challenges.
- Integration with electricity markets: Valuing thermal-storage services in grid markets requires new contractual and regulatory frameworks to recognize storage-as-resource value streams.
Research and pilot priorities:
Demonstration wells with transparent data sharing to improve resource models.
- Hybrid demonstrations coupling geothermal storage with renewables and grid-control software.
- R&D on corrosion-resistant materials and produced-water reuse or mineral recovery.
Environmental and community considerations
Geothermal projects carry environmental advantages—low direct CO2 emissions and small surface footprints,yet they must address specific concerns:
- Induced seismicity: Primarily a concern for high-pressure injection operations; risk is mitigated through monitoring, conservative injection limits, and adaptive management.
- Groundwater protection: Well design and siting must prevent contamination of potable aquifers; robust well integrity and casing/cementing standards are essential.
- Surface impacts: Drilling pads and pipelines can disrupt local land; careful siting and restoration reduce impacts.
- Community engagement: Transparent information-sharing, local hiring, and benefit-sharing (e.g., lower utility costs for cooperatives) foster social license.
The RRC’s permit conditions, reporting requirements, and monitoring frameworks provide a regulatory baseline to manage these environmental and social risks.
Case studies: Sage Geosystems and Quidnet permits
Two recent permit examples show how RRC rules are applied in practice:
Sage Geosystems (Atascosa County): The 2025 permit focused on a deep geopressured well intended to provide energy storage capacity to San Miguel Electric Cooperative. Key elements included robust monitoring, clear injection/withdrawal rules, and protections for groundwater and subsurface integrity.
- Quidnet (Galveston County): The 2026 permit allowed geopressured storage activities in a coastal geology context where reservoir pressure and fluid chemistry differ from inland plays. The permit emphasized operational controls and seismic monitoring given proximity to population centers and infrastructure.
Both permits highlight the RRC’s emphasis on stepwise approvals, baseline monitoring, and specific mitigation measures rather than blanket prohibitions—an approach that balances innovation and protection.
Geothermal expansion in Texas creates multiple commercial pathways:
Developers and EPC contractors: Project design, drilling services, and reservoir engineering expertise will be in demand.
- Equipment manufacturers: Pumps, heat exchangers, loop piping, and corrosion-resistant materials are growth markets.
- Service providers: Monitoring, reservoir modeling, produced-water treatment, and seismic risk services will expand.
- Utilities and cooperatives: End-users can leverage geothermal systems for resilience, peak-shaving, and long-duration storage services.
- Investors and financiers: Bankable projects with long-term offtake contracts or public backing will attract institutional capital.
Regional strengths:
- Oil and gas supply chain: Texas’ existing drilling services, rig fleets, and subsurface engineering talent lower the barrier to geothermal scale-up.
- Energy market size: ERCOT and other Texas grids provide a large market for storage and capacity products that geothermal can supply.
Policy levers and recommendations
To accelerate geothermal while managing risks, policymakers and regulators should consider:
- Data transparency: Require or incentivize public sharing of baseline and operational data from demonstration wells to reduce information asymmetry.
- Financial incentives: Time-limited credits or grants for exploration drilling and pilot demonstrations can lower upfront risk.
- Market recognition: Design market mechanisms or capacity products that explicitly value long-duration thermal storage and firming services.
- Workforce transition: Fund training programs to repurpose oil-and-gas skilled workers for geothermal-specific roles.
- Coordinated permitting: Ensure local, state, and federal permitting processes are aligned to avoid duplicative reviews that delay projects.
These levers help translate regulatory clarity into commercial scale-up.
Outlook: scaling geothermal in Texas
Texas has favorable ingredients for geothermal expansion: substantial subsurface expertise, a large and flexible energy market, and early regulatory clarity from the RRC. In the near term, expect:
- Continued shallow geothermal growth in public and commercial buildings where lifecycle cost and emissions reductions are compelling.
- Additional geopressured pilot and demonstration wells as developers prove reservoir performance and storage-operational value.
- Increasing interest from utilities and cooperatives seeking resilient, dispatchable energy or storage services.
Long-term success will hinge on reducing exploration and drilling costs, developing robust produced-water management solutions, and securing market and policy frameworks that remunerate long-duration storage and firm generation.
If Texas stakeholders regulators, developers, utilities, and financiers,align these technical and commercial pieces, geothermal energy can be a meaningful element of the state’s low-carbon, resilient energy mix.Commercial opportunities and value chains
Source: Gilmermirror
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