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
Lawrence Berkeley National Laboratory. (2021). DCIF Westerly Granite AE Stress Effect Test (Task 3-1) [data set]. Retrieved from https://dx.doi.org/10.15121/1829305.
Nakagawa, Seiji, Trzeciak, Maciej. DCIF Westerly Granite AE Stress Effect Test (Task 3-1). United States: N.p., 08 Jul, 2021. Web. doi: 10.15121/1829305.
Nakagawa, Seiji, Trzeciak, Maciej. DCIF Westerly Granite AE Stress Effect Test (Task 3-1). United States. https://dx.doi.org/10.15121/1829305
Nakagawa, Seiji, Trzeciak, Maciej. 2021. "DCIF Westerly Granite AE Stress Effect Test (Task 3-1)". United States. https://dx.doi.org/10.15121/1829305. https://gdr.openei.org/submissions/1343.
@div{oedi_1343, title = {DCIF Westerly Granite AE Stress Effect Test (Task 3-1)}, author = {Nakagawa, Seiji, 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. }, doi = {10.15121/1829305}, url = {https://gdr.openei.org/submissions/1343}, journal = {}, number = , volume = , place = {United States}, year = {2021}, month = {07}}
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
