Predicting Stimulation-Response Relationships for Engineered Geothermal Reservoirs Geothermal Lab Call Project
Last modified on July 22, 2011.
|Project Title||Predicting Stimulation-Response Relationships for Engineered Geothermal Reservoirs|
|Project Type / Topic 1||Laboratory Call for Submission of Applications for Research, Development and Analysis of Geothermal Technologies|
|Project Type / Topic 2||Stimulation Prediction Modeling|
|Project Description|| Future engineered geothermal reservoirs will be created mainly by stimulation of a lower permeability target formation through hydraulic fracturing to create the subsurface heat exchanger component for an enhanced geothermal system (EGS). However, the ability to create an adequate level of formation fracture permeability and interconnectivity between injection and producing wells has yet to be demonstrated according to a recent DOE GTP evaluation panel report. As a preliminary to the successful propagation of fracture permeability between the injectors and producers, both the MIT study and DOE GTP panel express the need for guidance provided by credible hydraulic-fracturing stimulation models capable of addressing the propagation of clusters of shear fractures in hard rock.
The models developed through this project will be used to explore not only the local effects of stimulation near a single well bore, but also how the stimulation of multiple wells, spaced across the reservoir, will influence heat transfer on a reservoir scale by enhancing formation connectivity and permeability subject to realistic thermal and regional stress conditions. It is our intent that these models will provide insight into selecting the best choices for producing long-term permeability enhancement on a site-by-site basis.
|Objectives||Develop realistic computer-based models of EGS stimulation-response scenarios involving hydraulic and explosive propagation of shear fracture systems in hard rock formations where a pre-existing fracture network may be present along with regional stress and temperature distributions.|
|Awardees (Company / Institution)||Lawrence Livermore National Laboratory|
|Funding Opportunity Announcement||DE-PS36-09GO99017|
|DOE Funding Level (total award amount)||$925,000.00|
|Total Project Cost||$925,000.00|
|Principal Investigator(s)||Charles R. Carrigan|
|Targets / Milestones|| - Acquire data is needed and available for existing and prospective EGS sites that can be used in the project's modeling efforts.
|Location of Project||Livermore, CA|
|Funding Source||American Recovery and Reinvestment Act of 2009|
|References||EERE Geothermal Technologies Programs|