Extraction-Induced Deformation in the Gas Hydrate Reservoir Using a Multiphase-Coupled THMC Solver
Publication: Geo-Congress 2024
ABSTRACT
Gas hydrates are ice-like substances found in deep sediments under high pressures and low temperatures, holding substantial natural gas reserves. Extracting gas from these reservoirs faces challenges due to complex interactions between hydrate-bearing sediments, fluid flow, and thermal processes. To address these challenges, a thermo-hydro-mechanical-chemical (THMC) simulator has been developed in this study. This simulator incorporates the change in mechanical (using advanced elastic-plastic models), thermal, and fluid flow characteristics in response to pressure, temperature, and production changes. A numerical solver for the coupled THMC processes in gas hydrate reservoirs has been created using finite volume method (FVM) and finite element method (FEM) approach within the PETSc framework. Using this simulator, the numerical study explores gas extraction using a single horizontal well, considering different reservoir porosity and hydrate saturation scenarios. The analysis reveals that the reservoirs characterized by higher porosity and hydrate saturation exhibit greater cumulative gas production till 30 days. However, the case with higher porosity and lower hydrate saturation experiences the maximum differential settlement after 30 days.
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Information & Authors
Information
Published In
Geo-Congress 2024
Pages: 72 - 81
History
Published online: Feb 22, 2024
ASCE Technical Topics:
- Energy engineering
- Energy sources (by type)
- Engineering fundamentals
- Engineering mechanics
- Finite element method
- Finite volume method
- Flow (fluid dynamics)
- Flow duration
- Fluid dynamics
- Fluid flow
- Fluid mechanics
- Fuels
- Hydration
- Hydraulic engineering
- Hydraulic structures
- Hydrologic engineering
- Laminating
- Materials engineering
- Materials processing
- Methodology (by type)
- Natural gas
- Non-renewable energy
- Numerical methods
- Petroleum
- Reservoirs
- Thermal analysis
- Thermodynamics
- Water and water resources
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