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EESA Awarded New Geothermal Projects Associated with FORGE3 min read

by Christina Procopiou on February 26, 2021

Energy Geosciences Division

David Alumbaugh (left), Julia Correa (middle), and Jonathan Ajo-Franklin (right) will provide leadership to two new geothermal projects associated with FORGE.


Seventeen projects have been selected to receive up to $46 million in funding from the University of Utah as part of the DOE’s Frontier Observatory for Geothermal Energy (FORGE) for cutting-edge, domestic, and carbon-free geothermal research. EESA will lead one of those projects, with
David Alumbaugh as lead PI, and will participate in a second FORGE-sponsored project led by EGD faculty scientist Jonathan Ajo-Franklin of Rice University, with Julia Correa as LBNL PI. 

The research will explore enhanced geothermal systems (EGS) technologies that are different from conventional geothermal resources which, like The Geysers in northern California, are naturally occurring and geographically limited due to the need for underground heat and fluids. These man-made geothermal reservoirs could be engineered in most parts of the country to increase geothermal energy production and potentially transform the domestic energy portfolio. Although the U.S. leads the world in installed geothermal capacity, power generation from conventional geothermal systems accounts for just two percent of the country’s renewable energy portfolio. The DOE GeoVision study indicates that advances in technology will permit EGS to provide a significant contribution to renewable power generation in the U.S. over the next few decades.

EESA has broad expertise in EGS research, namely as lead of EGS Collab, an effort involving nine other DOE national labs and eight universities focused on gaining advanced understanding of rock fractures through field experimentation. 

The two projects led by Alumbaugh and Ajo-Franklin both encompass one of the five topics designated by GTO and FORGE in their selection process: Field-scale characterization of reservoir stimulation and evolution over time, including thermal, hydrological mechanical, and chemical (THMC) effects. 

The project that Berkeley Lab will lead is entitled, “Joint Electromagnetic/Seismic/InSAR Imaging of Spatial-Temporal Fracture Growth and Estimation of Physical Fracture Properties During EGS Resource Development.” The objective of this project is to estimate spatiotemporal fracture growth and fracture properties during the engineered geothermal system (EGS) experiment at the Utah FORGE site. To that effect, LBNL scientists along with researchers at the Colorado School of Mines and Array Information Technologies will use electromagnetic, seismic, and Interferometric Synthetic Aperture Radar (InSAR) data in a novel joint inversion scheme that includes coupled temperature, hydrological, mechanical, and chemical (THMC) parameter estimation. 

David Alumbaugh said, “This project leverages Berkeley Lab’s leadership and expertise in acquiring and interpreting seismic and electromagnetic geophysical measurements with InSAR data analysis, along with recent advances and developments in computationally demanding THMC numerical modeling. The ultimate goal is to provide the FORGE site operators with specific information about the reservoir fracturing processes  including fracture location and orientation, and the volume of the reservoir that has been stimulated.”

The second project, led by Ajo-Franklin at Rice University and Correa as Berkeley Lab PI, is entitled “Fiber-Optic Geophysical Monitoring Of Reservoir Evolution at the FORGE Milford Site.” The project aims to apply continuous monitoring using an array of sensors, including fiber-optic strain sensors and permanent seismic sources, to understand the flowing fracture network. It will involve mapping the zones of mechanical stimulation, resolving the locations of newly formed fractures, as well as mapping the zones of flowing fractures. Continuous monitoring can be an important asset for EGS projects as it could help improve the location of new target injection and production wells, as well as plan stimulation activities, leading to optimized thermal recovery. 

Correa said, “This project gives us the opportunity to apply EESA’s unique expertise in distributed fiber-optic sensing and permanent sources to an area that hasn’t really seen a substantial industry application of geophysical techniques. 

“By improving our monitoring capabilities of EGS projects, we can better understand the fracture network affecting long-term geothermal energy production.”

 

News & Events

Study Sheds Light on Microbial Communities in Earth’s Subsurface2 min read

August 16, 2023

  From the tops of tree canopies to the bottom of groundwater reservoirs, a vast amount of living organisms interact with nonliving components such as rock, water, and soil to shape this area of Earth known as the “critical zone.” Over half of Earth’s microbes are located in the subsurface critical zone, which ranges from…

Carl Steefel Honored in Goldschmidt Session on Reactive Transport2 min read

August 2, 2023

The contributions of Carl Steefel to the reactive transport modeling scientific community were recognized in a session held in his honor at the recent Goldschmidt 2023 conference (Lyon, France). Goldschmidt is the foremost annual, international conference on geochemistry and related subjects, organized by the European Association of Geochemistry and the Geochemical Society. The session was…

DOE Funds Projects to Advance Forest Carbon Dioxide Removal Efforts and Agricultural Soil Carbon Conservation4 min read

August 1, 2023

The DOE Office of Fossil Energy and Carbon Management (FECM) and Office of Technology Transitions (OTT) recently announced $5 million in funding for four projects–two from Berkeley Lab with EESA leadership. The projects selected offer “promising solutions” to the nation’s climate change challenges by helping to reduce greenhouse gas emissions and will “accelerate their deployment…

Quantifying the strength of the land carbon sink3 min read

July 26, 2023

This article first appeared at nature.berkeley.edu/news. The world’s forests, grasslands, and other terrestrial ecosystems have played a substantial role in offsetting human carbon emissions—a capability that UC Berkeley researchers say would be threatened by continued global change. The assessment, published today as a new review paper in Nature Reviews Earth & Environment, presents a comprehensive analysis of…

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