Utah FORGE 2439: A Multi-Component Approach to Characterizing In-Situ Stress
Abstract
Core-based in-situ stress estimation, Triaxial Ultrasonic Velocity (labTUV) data, and Deformation Rate Analysis (DRA) data for Utah FORGE well 16A(78)-32 using triaxial ultrasonic velocity and deformation rate analysis. Report documenting a multi-component approach to characterizing in-situ stress at the U.S. DOE FORGE EGS site: laboratory, modeling and field measurement. Core-based methods for in-situ stress estimation were applied using samples from 5 intervals within the Utah FORGE 16A(78)-32 well. At three of these locations, Triaxial Ultrasonic Velocity (labTUV) tests were performed, resulting in experimentally-determined relationships between wave velocities and stresses. Non-monotonic increase in the velocity-stress relationships are inferred provide evidence of stress history and are therefore used to estimate in-situ stress magnitudes. Additionally, Deformation Rate Analysis (DRA) tests were run on core plugs from various orientations at each of the 5 sampling locations. These, too, provide evidence of stress history based on stress-strain behavior. A novel Weight of Evidence (WoE) method was developed as a means of synthesizing in-situ stress evidence from these two types of tests. Results indicate the minimum horizontal stress gradient ranges from 0.58 psi/ft to 0.69 psi/ft, with 4 of the 5 values between 0.66 psi/ft and 0.69 psi/ft. The vertical stress gradient ranges from 1.05 psi/ftmore »
- Authors:
-
- Battelle Memorial Institute
- Publication Date:
- Other Number(s):
- 1438
- DOE Contract Number:
- EE0007080
- Research Org.:
- DOE Geothermal Data Repository; Battelle Memorial Institute
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Geothermal Technologies Program (EE-4G)
- Collaborations:
- Battelle Memorial Institute
- Subject:
- 15 GEOTHERMAL ENERGY; 16A78-32; Characterization; DRA; Deformation Rate Analysis; EGS; FORGE; Field Measurement; In-Situ Stress; Laboratory; Modeling; Stress Test; TUV; Triaxial Ultrasonic Velocity; Utah FORGE; Weight of Evidence; Well Data; WoE; energy; geophysics; geothermal
- OSTI Identifier:
- 1923003
- DOI:
- https://doi.org/10.15121/1923003
Citation Formats
Bunger, Andrew, Higgins, Joshua, Huang, Yao, and Kelley, Mark. Utah FORGE 2439: A Multi-Component Approach to Characterizing In-Situ Stress. United States: N. p., 2022.
Web. doi:10.15121/1923003.
Bunger, Andrew, Higgins, Joshua, Huang, Yao, & Kelley, Mark. Utah FORGE 2439: A Multi-Component Approach to Characterizing In-Situ Stress. United States. doi:https://doi.org/10.15121/1923003
Bunger, Andrew, Higgins, Joshua, Huang, Yao, and Kelley, Mark. 2022.
"Utah FORGE 2439: A Multi-Component Approach to Characterizing In-Situ Stress". United States. doi:https://doi.org/10.15121/1923003. https://www.osti.gov/servlets/purl/1923003. Pub date:Tue Dec 13 04:00:00 UTC 2022
@article{osti_1923003,
title = {Utah FORGE 2439: A Multi-Component Approach to Characterizing In-Situ Stress},
author = {Bunger, Andrew and Higgins, Joshua and Huang, Yao and Kelley, Mark},
abstractNote = {Core-based in-situ stress estimation, Triaxial Ultrasonic Velocity (labTUV) data, and Deformation Rate Analysis (DRA) data for Utah FORGE well 16A(78)-32 using triaxial ultrasonic velocity and deformation rate analysis. Report documenting a multi-component approach to characterizing in-situ stress at the U.S. DOE FORGE EGS site: laboratory, modeling and field measurement. Core-based methods for in-situ stress estimation were applied using samples from 5 intervals within the Utah FORGE 16A(78)-32 well. At three of these locations, Triaxial Ultrasonic Velocity (labTUV) tests were performed, resulting in experimentally-determined relationships between wave velocities and stresses. Non-monotonic increase in the velocity-stress relationships are inferred provide evidence of stress history and are therefore used to estimate in-situ stress magnitudes. Additionally, Deformation Rate Analysis (DRA) tests were run on core plugs from various orientations at each of the 5 sampling locations. These, too, provide evidence of stress history based on stress-strain behavior. A novel Weight of Evidence (WoE) method was developed as a means of synthesizing in-situ stress evidence from these two types of tests. Results indicate the minimum horizontal stress gradient ranges from 0.58 psi/ft to 0.69 psi/ft, with 4 of the 5 values between 0.66 psi/ft and 0.69 psi/ft. The vertical stress gradient ranges from 1.05 psi/ft to 1.12 psi/ft, with 4 of the 5 zones given results between 1.09 psi/ft and 1.12 psi/ft. The maximum horizontal stress gradient ranges from 0.98 psi/ft to 1.34 psi/ft, with 4 of the 5 zones falling between 0.98 psi/ft and 1.24 psi/ft. The stress regime thus appears to be on the edge between normal faulting and strike-slip faulting, potentially flipping back and forth between the two regimes due to variability of rock properties, structures such as faults, and/or thermal anomalies.},
doi = {10.15121/1923003},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 13 04:00:00 UTC 2022},
month = {Tue Dec 13 04:00:00 UTC 2022}
}
