1. Geothermal Resource Exploration & Subsurface Characterization

We utilize a multi-physics approach to delineate thermal anomalies and map the structural controls of the reservoir.

• Magnetotellurics (MT) and Audio-MT (AMT): Deployment of deep-sensing EM surveys to identify the “clay cap” (conductive smectite zone) and the underlying high-temperature resistive reservoir. This is the industry standard for mapping volcanic geothermal systems.

• Passive Seismic & Microseismic Monitoring: Baseline monitoring to distinguish between natural tectonic activity and potential induced seismicity, while also identifying active fracture networks that facilitate fluid flow.

• Thermal Gradient & Heat Flow Analysis: Execution of shallow-hole temperature surveys and the calculation of conductive vs. convective heat transfer to estimate the Resource Power Potential ($MW_e$).

• Structural & Hydrogeological Mapping: Detailed analysis of fault architecture to determine “blind” geothermal targets where surface manifestations (hot springs/fumaroles) are absent.
  
  

2. Reservoir Engineering & Numerical Modeling

We transform subsurface data into predictive 4D models to optimize heat extraction and ensure reservoir longevity.

• Conceptual Model Development: Synthesis of geological, geochemical, and geophysical data into a coherent model of the heat source, reservoir, and seal.

• Numerical Simulation (TOUGH2 / FEFLOW): High-fidelity modeling of mass and heat transport to simulate various production/injection scenarios, predicting pressure drawdown and thermal breakthrough over a 30-year lifecycle.

• Fracture Network Characterization: Utilizing Discrete Fracture Network (DFN) modeling to understand how fluid moves through crystalline basement rocks, essential for Enhanced Geothermal Systems (EGS).

• Well Testing & Interference Analysis: Execution and interpretation of multi-rate flow tests and pressure transient analysis (PTA) to determine permeability-thickness and skin factors.
  
  

3. Well Engineering & Drilling Operations

Geothermal wells face extreme temperatures and corrosive fluids; our engineering ensures structural integrity in these High-Temperature, High-Pressure (HTHP) environments.

• Well Architecture & Casing Design: Engineering specialized casing strings (utilizing L80, T95, or K55 grades) and premium connections to withstand thermal expansion and contraction cycles.

• HTHP Drilling Fluid Management: Formulation of specialized, temperature-stable drilling muds and aerated fluids to prevent formation damage and manage lost circulation in highly fractured zones.

• Cementing Technology for Thermal Cycles: Design of high-silica flour cement slurries to prevent strength retrogression at temperatures exceeding 230°C.

• Directional Drilling & Target Optimization: Utilizing MWD (Measurement While Drilling) to steer wells into high-permeability fault intersections or “sweet spots” identified by our geophysics team.
  
  

4. Power Conversion Systems & Surface Infrastructure

We bridge the gap between the wellhead and the grid, optimizing the thermodynamic cycle based on the specific enthalpy of the resource.

• Thermodynamic Cycle Selection: Engineering of Flash Steam systems for high-temperature resources or Binary / Organic Rankine Cycle (ORC) systems for lower-temperature brines.

• Steam Gathering & Fluid Handling Systems: Design of two-phase flow pipelines, separators, and silencers to minimize pressure losses and manage non-condensable gases (NCGs).

• Materials Selection & Corrosion Engineering: Specifying exotic alloys or specialized coatings to mitigate the effects of H2S, CO2, and high-chloride brines on turbines and heat exchangers.
  
  

5. Geochemical & Environmental Management

Managing the chemical legacy and environmental footprint of geothermal production.

• Brine Geochemistry & Scaling Mitigation: Utilizing chemical speciation modeling to predict and prevent silica or calcite scaling in the production string and injection wells.

• NCG Management & Abatement: Design of systems to capture and sequester or treat non-condensable gases (e.g., H2S) to ensure air quality compliance.

• Induced Seismicity Risk Management: Implementation of “Traffic Light Systems” (TLS) to manage injection pressures and mitigate the risk of felt seismic events.
  
  

6. Regulatory Approval and Reporting Management

Applications for permits for geothermal units cover several scientific and engineering disciplines and are thus very complex.

Our team at Samarium Group has international experience in permit applications and can help clients with small and large projects of any kind.