Utah FORGE 2439: A Multi-Component Approach to Characterizing In-Situ Stress
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.
Citation Formats
TY - DATA
AB - 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.
AU - Bunger, Andrew
A2 - Higgins, Joshua
A3 - Huang, Yao
A4 - Kelley, Mark
DB - Geothermal Data Repository
DP - Open EI | National Renewable Energy Laboratory
DO - 10.15121/1923003
KW - geothermal
KW - energy
KW - Utah FORGE
KW - In-Situ Stress
KW - Laboratory
KW - Modeling
KW - Field Measurement
KW - TUV
KW - Triaxial Ultrasonic Velocity
KW - Deformation Rate Analysis
KW - DRA
KW - Weight of Evidence
KW - WoE
KW - EGS
KW - Stress Test
KW - Characterization
KW - Well Data
KW - geophysics
KW - FORGE
KW - 16A78-32
LA - English
DA - 2022/12/13
PY - 2022
PB - Battelle Memorial Institute
T1 - Utah FORGE 2439: A Multi-Component Approach to Characterizing In-Situ Stress
UR - https://doi.org/10.15121/1923003
ER -
Bunger, Andrew, et al. Utah FORGE 2439: A Multi-Component Approach to Characterizing In-Situ Stress. Battelle Memorial Institute, 13 December, 2022, Geothermal Data Repository. https://doi.org/10.15121/1923003.
Bunger, A., Higgins, J., Huang, Y., & Kelley, M. (2022). Utah FORGE 2439: A Multi-Component Approach to Characterizing In-Situ Stress. [Data set]. Geothermal Data Repository. Battelle Memorial Institute. https://doi.org/10.15121/1923003
Bunger, Andrew, Joshua Higgins, Yao Huang, and Mark Kelley. Utah FORGE 2439: A Multi-Component Approach to Characterizing In-Situ Stress. Battelle Memorial Institute, December, 13, 2022. Distributed by Geothermal Data Repository. https://doi.org/10.15121/1923003
@misc{GDR_Dataset_1438,
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.},
url = {https://gdr.openei.org/submissions/1438},
year = {2022},
howpublished = {Geothermal Data Repository, Battelle Memorial Institute, https://doi.org/10.15121/1923003},
note = {Accessed: 2025-04-23},
doi = {10.15121/1923003}
}
https://dx.doi.org/10.15121/1923003
Details
Data from Dec 13, 2022
Last updated Feb 18, 2025
Submitted Dec 14, 2022
Organization
Battelle Memorial Institute
Contact
Mark Kelley
614.424.3704
Authors
Keywords
geothermal, energy, Utah FORGE, In-Situ Stress, Laboratory, Modeling, Field Measurement, TUV, Triaxial Ultrasonic Velocity, Deformation Rate Analysis, DRA, Weight of Evidence, WoE, EGS, Stress Test, Characterization, Well Data, geophysics, FORGE, 16A78-32DOE Project Details
Project Name Utah FORGE
Project Lead Lauren Boyd
Project Number EE0007080