THMC Modeling of EGS Reservoirs – Continuum through Discontinuum Representations: Capturing Reservoir Stimulation, Evolution and Induced Seismicity Geothermal Project
Last modified on July 22, 2011.
|Project Title||THMC Modeling of EGS Reservoirs – Continuum through Discontinuum Representations: Capturing Reservoir Stimulation, Evolution and Induced Seismicity|
|Project Type / Topic 1||Recovery Act: Enhanced Geothermal Systems Component Research and Development/Analysis|
|Project Type / Topic 2||Integrated Chemical, Thermal, Mechanical and Hydrological Modeling|
|Project Description|| The ability to routinely develop a long-lived, high-volume, low-impedance and high-heat-transfer-area reservoirs at-will and at-depth is central to the viability of EGS as a low-carbon energy source. The evolution of porosity, permeability and heat transfer area in such pressure-sensitive fractured reservoirs is strongly controlled by the intense interaction of Thermal, Hydrological, Mechanical and Chemical (THMC) effects in these systems pushed far from equilibrium
This project addresses the critical issue of quantifying the impact of strong and innately coupled interactions of stress and chemistry on the evolution of fluid transport and thermal drawdown in EGS reservoirs. It accommodates (i) crucial modes of failure in reactivated relic fractures and intact material treated as aseismic through seismic rupture in a discontinuum; (ii) a full coupling for the interaction of concurrent THMC effects; and (iii) elucidation of the sequencing and severity of THMC effects on reservoir production and longevity.
|Objectives|| - Extend current Thermal, Hydrological, Mechanical and Chemical (THMC) models representing equivalent dual porosity deformable continua to accommodate new process laws and develop new models to follow the intense process interactions during stimulation and early production.
|Awardees (Company / Institution)||Pennsylvania State University|
|Partner 1||Lawrence Berkeley National Lab|
|Funding Opportunity Announcement||DE-FOA-0000075|
|DOE Funding Level (total award amount)||$1,113,024.00|
|Awardee Cost Share||$489,476.00|
|Total Project Cost||$1,602,500.00|
|Principal Investigator(s)||Derek Elsworth of PSU|
|Other Principal Investigators||Joshua Taron, PSU; Eric Sonnenthal, LBNL|
|Targets / Milestones|| - Develop coupled THMC models capable of accommodating (i) rupture and failure in discontinuous fractured reservoirs (ii) where the full quadruplet of THMC interactions is rigorously accommodated.
|Location of Project||University Park, PA|
|Impacts||Addresses insufficient modeling and validation capabilities to effectively couple fluid flow, geochemistry, and thermal-mechanical phenomena for stimulation prediction and reservoir simulation.|
|Funding Source||American Recovery and Reinvestment Act of 2009|
|References||EERE Geothermal Technologies Programs|