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    • DCIF (Directional Cooling-Induced Fracturing) Westerly Granite AE Borehole Damage Effect Test (Task 3-0)

    Metadata Updated: January 20, 2025

    Directional Cooling-Induced Fracturing (DCIF) experiments were conducted on three rectangular Westerly granite blocks (width=depth=4.0", height=2.0") which were preheated to 200, 400, and 600 degree C to induce damage (microcracks) with varying degrees. 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. The experiments were conducted under one selected biaxial stress (5.8MPa). The obtained AEs were used to determine the microcracking source locations and amplitude, and the associated moment tensors. The onset time of the AEs was correlated with the cooling temperature, which was used to show that the temperature at the onset of microcracking is not affected significantly by the preexisting damage, compared to the impact of the stress in the sample. Included in this submission are the animations of the AE locations and graphics displaying the measured temperature-AE activity changes for samples with different degrees of microcrack damage.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: Creative Commons Attribution

    Downloads & Resources

    Dates

    Metadata Created Date January 11, 2025
    Metadata Updated Date January 20, 2025

    Metadata Source

    Harvested from OpenEI data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 11, 2025
    Metadata Updated Date January 20, 2025
    Publisher Lawrence Berkeley National Laboratory
    Maintainer
    Doi 10.15121/1842336
    Identifier https://data.openei.org/submissions/7475
    Data First Published 2022-01-27T07:00:00Z
    Data Last Modified 2022-01-27T22:03:51Z
    Public Access Level public
    Bureau Code 019:20
    Metadata Context https://openei.org/data.json
    Metadata Catalog ID https://openei.org/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Data Quality True
    Datagov Dedupe Retained 20250120155001
    Harvest Object Id 2fa0021d-8071-492c-8f27-af597b481aa8
    Harvest Source Id 7cbf9085-0290-4e9f-bec1-91653baeddfd
    Harvest Source Title OpenEI data.json
    Homepage URL https://gdr.openei.org/submissions/1362
    License https://creativecommons.org/licenses/by/4.0/
    Old Spatial {"type":"Polygon","coordinates":-122.23848096158116,37.87640827519297,-122.23848096158116,37.87640827519297,-122.23848096158116,37.87640827519297,-122.23848096158116,37.87640827519297,-122.23848096158116,37.87640827519297}
    Program Code 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
    Source Datajson Identifier True
    Source Hash dd2f9ee8e42cf44ab357fe8ccc5544f1dc1b8be53ba94d51619ba92fbb693247
    Source Schema Version 1.1
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