This report discusses the objectives, goals, accomplishments and results of Phase 3B Year 1 of the Utah FORGE project. The report includes infrastructure, seismic monitoring, modelling, external R&D, communications and outreach, data produced, lessons learned, conclusions, and planned activities. Phase 3B Year 1 site activities focused on the stimulation of well 16A(78)-32, seismic monitoring, and data analysis. The ultimate objective of Utah FORGE remains to demonstrate the viability of Enhanced Geothermal System (EGS) energy development.

This is the annual report for Utah FORGE Phase 3A, year two, which was published on July 28th, 2022. The report includes site infrastructure, site operations, seismic monitoring reports, FORGE modeling reports, and external research and design. The ultimate objective of Utah FORGE is to demonstrate the viability of Enhanced Geothermal System (EGS) energy development. This report presents an overview of Phase 3A Year 2 activities. Year 1 activities transitioned the Utah FORGE project from site characterization and baseline monitoring to infrastructure development required for full deployment of the Utah FORGE laboratory.

This is the Utah FORGE annual report for Phase 3A year 1, which was completed on December 28th, 2020. This report includes site infrastructure, site operations, seismic monitoring, a conceptual geological model, outreach, and communications for the Utah FORGE project during Phase 3A in 2020. Utah FORGE projects showcase the role of geothermal energy and Enhanced Geothermal Systems (EGS) as a renewable source of power for the United States. The geoscientific investigations done in the Utah FORGE projects demonstrate the surrounding region holds significant potential for future EGS development.

This is the Utah FORGE annual report for Phase 3A year 1, which was completed on December 28th, 2020. This report includes site infrastructure, site operations, seismic monitoring, a conceptual geological model, outreach, and communications for the Utah FORGE project during Phase 3A in 2020. Utah FORGE projects showcase the role of geothermal energy and Enhanced Geothermal Systems (EGS) as a renewable source of power for the United States. The geoscientific investigations done in the Utah FORGE projects demonstrate the surrounding region holds significant potential for future EGS development.

This 2024 annual report for Phase 3B Year 2 at Utah FORGE provides an in-depth account of activities and advancements made at the site. Key achievements include drilling and stimulating the production well 16B(78)-32, creating a geothermal reservoir, and achieving commercial-scale production rates. The report documents innovations in drilling, such as improved rates of penetration, the deployment of fiber optic cables for real-time monitoring, and the successful testing of advanced drilling technologies. It details significant infrastructure enhancements, including the construction of lined lakes for water storage and the installation of fiber optic networks for seismic data acquisition. Research and development projects involved multiple academic and industry partners, advancing tools for Enhanced Geothermal Systems (EGS). Extensive environmental, seismic, and flow monitoring supported reservoir characterization and informed stimulation strategies. Public outreach efforts, along with the addition of 277 GB of technical data to the Geothermal Data Repository, highlight Utah FORGE's commitment to transparency and collaboration within the geothermal energy community.

The report provided here describes research activities between August 16th, 2018 and July 30th, 2024. The goals of the research activities are to conduct an Interferometric Synthetic Aperture Radar (InSAR) analysis and Ground Surface Deformation Modeling at the Utah FORGE site. InSAR data have been obtained from two satellite missions and combined pair-wise into interferograms to assess ground deformation. These InSAR datasets are compiled below as links to their respective destinations in the GDR. The project found that the InSAR data analyzed do not show any measurable deformation in the area immediately surrounding the FORGE wells and no vertical surface displacement that could be measurable by InSAR or GPS is expected from the stimulation experiments conducted at the site in 2023 or 2024. The report goes on to state the expected vertical displacement at the Earth's surface is less than 1 millimeter, based on modeling using an analytic solution. Hydromechanical modeling also predicts that the magnitude of the deformation produced by injection experiments is too small to be measured by InSAR or GPS.

Report on possible geodetic signature of the 3 stimulations in April 2022 as well as a comparison with existing InSAR data gathered over the site before, during, and after the stimulation. In geothermal production it is important to understand the existing stress field and the changes in the stress associated with field development. The stress field is a controlling factor in the development and properties of natural and stimulated fractures. Furthermore, changes in the stress field can lead to associated seismicity and the potential for felt earthquakes. It is difficult to estimate stresses directly and they are typically inferred from well tests and observed strain. In this task our goal is to incorporate observed strain data into the fully integrated models of the stimulations at the FORGE site. FORGE project 3-2535 is planning on using a casing source EM method for detecting and imaging a deep localized stimulated fracture zone at the Utah FORGE site. Details on other stages of the project are included in the linked GDR submissions below.

This dataset contains seismic event detections acquired using the 151 Nodal geophones deployed at the Utah FORGE site in April 2019. Details regarding the publishing are available in the paper linked below (Mesimeri, M. and K. L. Pankow et al. 2020). A frequency-domain-based algorithm for detecting induced seismicity using dense surface seismic arrays, Geophys. J. Int, submitted.

This report provides a first-order assessment of the producible energy from the Utah FORGE EGS reservoir, based on stimulation and circulation testing in 2024. The assessment is based on a stored heat calculation for a cylindrical volume of stimulated hot dry rock enveloping the deviated legs of wells 16A(78)-32 and 16B(78)-32, and conservative estimates for recoverable energy. It also shows the potential for increased power production with deepening of the reservoir. The results are compared with the power produced during the 27-day circulation test in August-September 2024.

Preliminary monitoring and analyses for the Utah FORGE Milford Site. Includes a report detailing the seismic monitoring goals and results, a detailed techno-economic infrastructure assessment with an analysis, a budget, schedules, and cost summaries, and a summary of environmental impacts.