Utah FORGE: Distributed Acoustic Sensing Strain Signatures as an Indicator of Fracture Connectivity in Enhanced Geothermal Systems
Stimulated fracture connectivity between injector and producer is a critical prerequisite for efficient EGS thermal recovery. 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 to be conducted at the Utah Frontier Observatory for Research in Geothermal Energy (FORGE) in 2023.
Citation Formats
Rice University. (1970). Utah FORGE: Distributed Acoustic Sensing Strain Signatures as an Indicator of Fracture Connectivity in Enhanced Geothermal Systems [data set]. Retrieved from https://gdr.openei.org/submissions/1582.
Ward-Baranyay, Megan, Ajo-Franklin, Jonathan, and Ghassemi, Ahmad. Utah FORGE: Distributed Acoustic Sensing Strain Signatures as an Indicator of Fracture Connectivity in Enhanced Geothermal Systems. United States: N.p., 01 Jan, 1970. Web. https://gdr.openei.org/submissions/1582.
Ward-Baranyay, Megan, Ajo-Franklin, Jonathan, & Ghassemi, Ahmad. Utah FORGE: Distributed Acoustic Sensing Strain Signatures as an Indicator of Fracture Connectivity in Enhanced Geothermal Systems. United States. https://gdr.openei.org/submissions/1582
Ward-Baranyay, Megan, Ajo-Franklin, Jonathan, and Ghassemi, Ahmad. 1970. "Utah FORGE: Distributed Acoustic Sensing Strain Signatures as an Indicator of Fracture Connectivity in Enhanced Geothermal Systems". United States. https://gdr.openei.org/submissions/1582.
@div{oedi_1582, title = {Utah FORGE: Distributed Acoustic Sensing Strain Signatures as an Indicator of Fracture Connectivity in Enhanced Geothermal Systems}, author = {Ward-Baranyay, Megan, Ajo-Franklin, Jonathan, and Ghassemi, Ahmad.}, abstractNote = {Stimulated fracture connectivity between injector and producer is a critical prerequisite for efficient EGS thermal recovery. 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 to be conducted at the Utah Frontier Observatory for Research in Geothermal Energy (FORGE) in 2023.}, doi = {}, url = {https://gdr.openei.org/submissions/1582}, journal = {}, number = , volume = , place = {United States}, year = {1970}, month = {01}}
Details
Data from Jan 1, 1970
Last updated Feb 9, 2024
Submission in progress
Organization
Rice University
Contact
Matthew W Becker
562.985.8983
Authors
Keywords
geothermal, energy, FORGE, Utah FORGE, EGS, Milford, Utah, COMSOL, DFNDOE Project Details
Project Name Utah FORGE
Project Lead Kevin Jones
Project Number EE0007080