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Utah FORGE 3-2417: Simulations for Distributed Acoustic Sensing Strain Signatures as an Indicator of Fracture Connectivity
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National Renewable Energy Laboratory (NREL) - view all
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Last updated4 days ago
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Overview

This dataset encompasses simulations of strain signatures from both hydraulically connected and "near-miss" fractures in enhanced geothermal systems (EGS). The files and results are presented from the perspective of digital acoustic sensing's (DAS) potential to differentiate the two fracture types. This dataset was acquired by the FOGMORE R&D project (Fiber Optic Geophysical MOnitoring of Reservoir Evolution), under Utah FORGE R&D Project 3-2417. Included are simulation and results via MatLab and COMSOL files, as well as a thesis and paper summarizing the results. Some stimulated fractures may be incomplete, approaching but not intersecting the production well. These "near-miss" fractures can be addressed in future stimulation stages or re-stimulated to complete the connection. We propose the use of fiber optic distributed acoustic sensing (DAS) as a method by which near-miss stimulated fractures may be identified and distinguished from hydraulically connected fractures. The low-frequency sub-nanostrain signatures of both complete and near-miss fractures in DAS data are simulated in this study using a hydrogeomechanical discrete fracture network model. The spatial distribution of strain was found to be an accurate indicator. However, this indicator must be evaluated in the context of DAS gauge length and spatial sampling. These simulations are a precursor to tests conducted at FORGE in 2023.

COMSOLDASDFNEGSFOGMOREFORGEMatLabMilfordUtahUtah FORGEcodedistributed acoustic sensingenergygeophysicsgeothermalhydrogeomechanicsmodelingnear-miss fracturesimulationstimulationstrainsub-nanostrain
Additional Information
KeyValue
Dcat Issued2023-01-01T07:00:00Z
Dcat Modified2024-08-22T15:58:36Z
Dcat Publisher NameRice University
Guidhttps://data.openei.org/submissions/7661
Harvest Object Id4d331696-3ec7-4c27-829b-72fcd7045254
Harvest Source Id4eb7107f-a2b1-40e3-b36a-8161aa98a56e
Harvest Source TitleOpenEI Data Portal
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