DCIF Westerly Granite AE Stress Effect Test (Task 3-1)

Published by Lawrence Berkeley National Laboratory | Department of Energy | Metadata Last Checked: January 27, 2026 | Last Modified: 2021-11-08T20:04:30Z

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.

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Complete Metadata

bureauCode	[ "019:20" ]
dataQuality	true
DOI	10.15121/1829305
identifier	https://data.openei.org/submissions/7459
issued	2021-07-08T06:00:00Z
landingPage	https://gdr.openei.org/submissions/1343
programCode	[ "019:006" ]
projectLead	Zachary Frone
projectNumber	EE0009033
projectTitle	DEVELOPMENT OF A DIRECTIONAL COOLING INDUCED FRACTURING (DCIF) TECHNOLOGY FOR NEAR-WELLBORE STRESS ESTIMATION IN GEOTHERMAL RESERVOIRS
spatial	{"type":"Polygon","coordinates":[[[-122.23850368901456,37.876494141442386],[-122.23850368901456,37.876494141442386],[-122.23850368901456,37.876494141442386],[-122.23850368901456,37.876494141442386],[-122.23850368901456,37.876494141442386]]]}