DCIF Westerly Granite AE Stress Effect Test (Task 3-1)
Directional Cooling-Induced Fracturing (DCIF) experiments were conducted on rectangular Westerly granite blocks (width=depth=4.0", height=2.0"). Liquid nitrogen was poured in a small, 1"-diameter copper cup attached to the top of the sample, and the resulting acoustic emissions (AEs) and temperature changes on the surface of the sample were monitored. Several confining stresses were applied bi-axially to the sides of the samples so that the onset of AE activity and the stress applied to the sample were correlated. The obtained AEs were used to determine the microcracking source locations and amplitude, and the associated moment tensors. Included in this submission are the animations of the AE locations and graphics displaying the measured temperature-AE activity changes for different stresses.
Citation Formats
TY - DATA
AB - Directional Cooling-Induced Fracturing (DCIF) experiments were conducted on rectangular Westerly granite blocks (width=depth=4.0", height=2.0"). Liquid nitrogen was poured in a small, 1"-diameter copper cup attached to the top of the sample, and the resulting acoustic emissions (AEs) and temperature changes on the surface of the sample were monitored. Several confining stresses were applied bi-axially to the sides of the samples so that the onset of AE activity and the stress applied to the sample were correlated. The obtained AEs were used to determine the microcracking source locations and amplitude, and the associated moment tensors. Included in this submission are the animations of the AE locations and graphics displaying the measured temperature-AE activity changes for different stresses.
AU - Nakagawa, Seiji
A2 - Trzeciak, Maciej
DB - Geothermal Data Repository
DP - Open EI | National Renewable Energy Laboratory
DO - 10.15121/1829305
KW - geothermal
KW - energy
KW - thermal fracturing
KW - stress measurement
KW - fracturing
KW - processed data
KW - geophysics
KW - stress testing
KW - granite
KW - Westerly Granite
KW - stress
KW - microfracture
KW - fracture
KW - data
KW - temperature
KW - acoustic emission
KW - acoustic emission location
KW - acoustic emission rate
LA - English
DA - 2021/07/08
PY - 2021
PB - Lawrence Berkeley National Laboratory
T1 - DCIF Westerly Granite AE Stress Effect Test (Task 3-1)
UR - https://doi.org/10.15121/1829305
ER -
Nakagawa, Seiji, and Maciej Trzeciak. DCIF Westerly Granite AE Stress Effect Test (Task 3-1). Lawrence Berkeley National Laboratory, 8 July, 2021, Geothermal Data Repository. https://doi.org/10.15121/1829305.
Nakagawa, S., & Trzeciak, M. (2021). DCIF Westerly Granite AE Stress Effect Test (Task 3-1). [Data set]. Geothermal Data Repository. Lawrence Berkeley National Laboratory. https://doi.org/10.15121/1829305
Nakagawa, Seiji and Maciej Trzeciak. DCIF Westerly Granite AE Stress Effect Test (Task 3-1). Lawrence Berkeley National Laboratory, July, 8, 2021. Distributed by Geothermal Data Repository. https://doi.org/10.15121/1829305
@misc{GDR_Dataset_1343,
title = {DCIF Westerly Granite AE Stress Effect Test (Task 3-1)},
author = {Nakagawa, Seiji and Trzeciak, Maciej},
abstractNote = {Directional Cooling-Induced Fracturing (DCIF) experiments were conducted on rectangular Westerly granite blocks (width=depth=4.0", height=2.0"). Liquid nitrogen was poured in a small, 1"-diameter copper cup attached to the top of the sample, and the resulting acoustic emissions (AEs) and temperature changes on the surface of the sample were monitored. Several confining stresses were applied bi-axially to the sides of the samples so that the onset of AE activity and the stress applied to the sample were correlated. The obtained AEs were used to determine the microcracking source locations and amplitude, and the associated moment tensors. Included in this submission are the animations of the AE locations and graphics displaying the measured temperature-AE activity changes for different stresses. },
url = {https://gdr.openei.org/submissions/1343},
year = {2021},
howpublished = {Geothermal Data Repository, Lawrence Berkeley National Laboratory, https://doi.org/10.15121/1829305},
note = {Accessed: 2025-04-23},
doi = {10.15121/1829305}
}
https://dx.doi.org/10.15121/1829305
Details
Data from Jul 8, 2021
Last updated Nov 8, 2021
Submitted Oct 21, 2021
Organization
Lawrence Berkeley National Laboratory
Contact
Seiji Nakagawa
510.486.7894
Authors
Keywords
geothermal, energy, thermal fracturing, stress measurement, fracturing, processed data, geophysics, stress testing, granite, Westerly Granite, stress, microfracture, fracture, data, temperature, acoustic emission, acoustic emission location, acoustic emission rateDOE Project Details
Project Name DEVELOPMENT OF A DIRECTIONAL COOLING INDUCED FRACTURING (DCIF) TECHNOLOGY FOR NEAR-WELLBORE STRESS ESTIMATION IN GEOTHERMAL RESERVOIRS
Project Lead Zachary Frone
Project Number EE0009033
