Geothermal Energy Resources Assessment and Development Consulting
A&A Consulting Services for Conventional Hydrothermal, Enhanced Geothermal Systems (EGS), Superhot-Rock, and Closed-Loop Geothermal — Resource Assessment, Reservoir Simulation, Well Engineering, and Project Development — Worldwide
Assign your company's most challenging geothermal energy resource assessment and development projects to A&A, and let the A&A Consulting Team of high-level, seasoned geothermal consultants find the most appropriate solutions for you.
Geothermal energy has moved to the center of U.S. energy strategy. In May 2025, the U.S. Department of the Interior implemented emergency permitting procedures — compressing Bureau of Land Management environmental reviews to a 14-day timeframe — to accelerate geothermal project approvals in the name of national security and energy dominance. The U.S. Department of Energy's July 2025 Pathways to Commercial Liftoff report projects that next-generation (enhanced) geothermal could grow 25-fold from today's roughly 3.7 GW installed base to 90–132 GW of capacity by 2050 — as much as 8.5% of total U.S. electricity generation. A March 2025 Rhodium Group analysis further found that geothermal could economically meet up to 64% of hyperscale data centers' projected electricity demand growth through the early 2030s under today's clustered-siting patterns, and effectively all of it where data centers are sited near strong geothermal resources.
Avasthi & Associates, Inc. (A&A) is an independent petroleum, geothermal, and energy engineering and geoscience consulting firm. A&A does not sell drilling equipment, downhole tools, power-plant equipment, or reservoir-simulation software — our only business is expert technical consulting, which means our recommendations on your geothermal resource assessment, reservoir engineering, and project development are never influenced by a stake in the technology or equipment being used.
If your company needs conventional or next-generation geothermal energy resource assessment for a country or a specific region, geothermal feasibility studies, complex modeling of Enhanced Geothermal Systems (EGS) or closed-loop geothermal (CLG), geothermal drilling and well stimulation, geothermal energy storage, geothermal project development, or any other aspect of conventional or next-generation (hot-dry-rock/superhot-rock) geothermal energy resource assessment and development, please contact us.
Read more below how the high-level, seasoned geothermal consultants of the A&A Consulting Team can help your company on its challenging geothermal energy resource assessment and development projects, around the world:
Related A&A Service: This page is one of nine services under A&A's broader energy transition practice — for A&A's full energy storage, hydrogen, ammonia, lithium, and geothermal service directory, please see A&A's Energy Transition & Decarbonization Consulting page.
Related A&A Service: For A&A's UTES/GeoTES thermal energy storage services — including geothermal heat storage using repurposed or dedicated wells — please see A&A's Energy Storage Assessment and Development Consulting page.
Related A&A Service: For A&A's brine resource assessment and well-engineering services for Direct Lithium Extraction, including combined geothermal-and-lithium co-production, please see A&A's Lithium (DLE) Consulting page.
1. Geothermal Energy Resource Assessment
• Regional and National Geothermal Potential Evaluation: Conducting large-scale geothermal energy assessments for a country or a specific region of interest
• Exploration Strategy: Designing exploration campaigns to identify and map high-potential geothermal reservoirs
• Surface and Subsurface Data Integration: Utilizing geological, geochemical, and geophysical data to characterize geothermal prospects
• Heat-in-place and recoverable-heat estimation
• Temperature-gradient and heat-flow mapping
• Geological and structural model development
• Hydrothermal and fracture-permeability analysis
• Geochemical reservoir characterization
• Magnetotelluric and geophysical data interpretation
• Reservoir pressure and fluid-origin analysis
• Identification of drilling targets and sweet spots
• Conceptual geothermal system modeling
• Resource classification (UNFC, USGS, and other internationally recognized reporting methodologies)
2. Geothermal Feasibility Studies
• Preliminary and Detailed Feasibility Studies: Evaluating technical and economic feasibility for geothermal power plants and direct-use applications
• Resource Characterization and Well Targeting: Assessing reservoir temperature, permeability, and fluid properties to determine optimal drilling locations
• Financial and Economic Modeling: Conducting cost-benefit analysis, levelized cost of electricity (LCOE) calculations, and investment risk assessments
• Geothermal Well Design & Optimization: Engineering solutions for production and reinjection well placement and completion
• Power-potential and energy-output estimation
• Technology selection (binary, flash, hybrid, EGS, CO₂-plume geothermal)
• CAPEX and OPEX modeling
• Levelized cost of electricity (LCOE) analysis
• Surface facility and plant configuration
• Water sourcing and reinjection strategy
• Environmental and permitting screening
• Risk and uncertainty analysis
• Development schedule and phasing
• Financial attractiveness and investment ranking
3. Advanced Geothermal Reservoir Simulation & Modeling
• Conventional and Unconventional Geothermal Systems: Modeling hydrothermal, hot-dry-rock/superhot-rock, and supercritical geothermal systems
• Numerical Reservoir Simulation: Utilizing industry-standard software — including Volsung, CMG STARS, and ResFrac — for coupled fluid-flow and heat-transfer modeling
• Enhanced Geothermal Systems (EGS) Simulation: Designing and optimizing hydraulic-fracturing operations to improve reservoir permeability
• Geothermal Production Forecasting: Predicting reservoir performance under different operating scenarios to ensure long-term sustainability
• Reinjection Strategy Optimization: Evaluating the impact of reinjection on reservoir pressure and thermal sustainability
• 3D geological and fracture-network modeling
• Natural and stimulated permeability modeling
• Thermal drawdown and reservoir-sustainability analysis
• Well interference and spacing optimization
• Production and injection forecasting
• CO₂-plume geothermal modeling
• Closed-loop thermal-extraction modeling
• Coupled thermal-hydraulic-mechanical (THM) simulation
• History matching of pilot wells
• Long-term recovery-factor estimation
4. Geothermal Drilling & Well Stimulation
• Drilling Program Design: Developing cost-effective drilling strategies tailored to geothermal environments
• Hydraulic Fracturing for Enhanced Geothermal Systems (EGS): Designing and optimizing stimulation techniques to enhance reservoir connectivity
• Well Testing and Data Analysis: Conducting pressure-transient tests, injectivity tests, and tracer studies for reservoir characterization
• Well design for high-temperature environments
• Drilling-target optimization
• Lost-circulation and HPHT risk analysis
• Acidizing and thermal-stimulation evaluation
• Microseismic and fracture monitoring
• Well testing and injectivity analysis
• Productivity and skin-factor evaluation
• Casing and cement-integrity design
• Workover and recompletion planning
5. Project Development & Technical Advisory
• Technology Selection and Risk Assessment: Advising clients on the best technologies and risk-mitigation strategies for geothermal development
• Investment and Financial Advisory: Assisting investors with due diligence and financial modeling for geothermal projects
• Capacity Building and Training: Offering specialized training programs for professionals in geothermal energy development
• Integrated field development planning
• Phased drilling and expansion strategy
• Technical due diligence for investors
• Independent resource and reserve certification
• Project risk management
• Technology-vendor evaluation
• Government and regulatory technical support
• Grid interconnection and dispatch modeling
• Carbon-credit and ESG optimization
• Project execution oversight
6. Closed-Loop Geothermal Resource Assessment
• Site Selection and Geological Assessment: Identifying optimal locations for closed-loop geothermal deployment based on subsurface heat characteristics
• Thermal Gradient Analysis: Evaluating subsurface heat availability to determine the viability of closed-loop systems
• Well Design and System Configuration: Engineering solutions for deep borehole heat exchangers, advanced conduction-based loops, and supercritical-fluid-based systems
• Subsurface thermal-conductivity and heat-capacity mapping
• Optimal well spacing and depth selection
• Horizontal and multilateral well design
• Thermal drawdown and recharge modeling
• Power-output forecasting
• Working-fluid selection (water, CO₂, etc.)
• Thermal losses and efficiency modeling
• Integration with existing oil & gas wells or mines
• CAPEX and energy-cost evaluation
• Scalability and modular-deployment planning
Software & Technical Tools
The high-level, seasoned geothermal consultants of the A&A Consulting Team are expert users of the industry-standard software and technical tools used for state-of-the-art geothermal and EGS reservoir engineering and simulation studies, including:
• Volsung: For integrated geothermal reservoir and well/doublet performance modeling
• TOUGH2 / iTOUGH2: For coupled multiphase, non-isothermal geothermal reservoir simulation
• CMG STARS: For coupled thermal-fluid-flow simulation of hydrothermal and EGS reservoirs
• ResFrac: For hydraulic-fracturing (HF) design and EGS stimulation simulation
• GEOPHIRES: For techno-economic modeling and LCOE analysis of geothermal projects
• CMOST: For optimization, uncertainty, and sensitivity studies
• Python, MATLAB: For automated analysis and custom sensitivity workflows
Deliverables
The high-level, seasoned geothermal consultants of the A&A Consulting Team provide the deliverables required for sound decision-making, including, but not limited to:
• Full technical studies — resource assessment, feasibility, reservoir simulation, and well engineering for hydrothermal, EGS, and closed-loop geothermal projects
• Simulation-driven decision support for field development planning (FDP)
• Techno-economic evaluation, LCOE analysis, and investment risk assessment
• Independent resource and reserve certification, and technical due diligence for investors and lenders
• High-quality final reports and executive presentations
To put the high-level, seasoned geothermal consultants of the A&A Consulting Team to work on your company's challenging geothermal energy resource assessment and development projects, around the world, please contact us.
A&A's geothermal reservoir engineers also bring deep expertise in thermal reservoir simulation from the oil & gas industry — to read how the A&A Consulting Team can help on your company's challenging Thermal EOR (steamflood/CSS) projects, please click here.
Frequently Asked Questions
What types of geothermal systems does A&A work with?
A&A provides consulting across conventional hydrothermal systems, Enhanced Geothermal Systems (EGS), superhot-rock, and closed-loop (conduction-based) geothermal — both next-generation and traditional development types.
Does A&A sell geothermal drilling equipment or simulation software?
No. A&A is an independent petroleum, geothermal, and energy engineering and geoscience consulting firm — we do not sell equipment, hardware, or software, so our recommendations are never influenced by a stake in a particular technology.
What software does A&A use for geothermal reservoir simulation?
A&A's geothermal consultants are expert users of industry-standard tools, including Volsung, TOUGH2/iTOUGH2, CMG STARS, ResFrac, GEOPHIRES, and CMOST, among others.
Can A&A help assess geothermal potential for an entire country or region?
Yes. A&A conducts large-scale regional and national geothermal potential evaluations, combining heat-in-place estimation, exploration strategy, and geological/geophysical data integration.
Does A&A's geothermal expertise extend to data center energy solutions?
Yes — A&A's geothermal consultants regularly advise on geothermal energy solutions for hyperscale data centers, an area of fast-growing demand.
How does A&A's oil & gas experience help with geothermal projects?
A&A's geothermal reservoir engineers also bring deep expertise in thermal reservoir simulation from the oil & gas industry (steamflood/CSS), which translates directly into geothermal reservoir and EGS simulation work.
