TY - JOUR
T1 - Velocity analysis and moveout-based event detection using downhole DAS records
AU - Lellouch, Ariel
AU - Yuan, Siyuan
AU - Spica, Zack
AU - Biondi, Biondo
AU - Ellsworth, William L.
N1 - Publisher Copyright:
© 2019 SEG
PY - 2019/8/10
Y1 - 2019/8/10
N2 - We show how vertical downhole distributed acoustic sensing arrays can be used for P- and S- velocity analysis along the array. Using such velocity models, the array can be used in an effective moveout-based earthquake detection approach. We demonstrate both applications on 20 days of passive records at the San Andreas Fault Observatory at Depth, which comprises of a ~800 m deep vertical array. Estimated P velocities are comparable to an active geophone survey and S velocities are extracted for the first time in the area. Over 75% of the events in the USGS catalog in the area are detected, as well as a new earthquake.
AB - We show how vertical downhole distributed acoustic sensing arrays can be used for P- and S- velocity analysis along the array. Using such velocity models, the array can be used in an effective moveout-based earthquake detection approach. We demonstrate both applications on 20 days of passive records at the San Andreas Fault Observatory at Depth, which comprises of a ~800 m deep vertical array. Estimated P velocities are comparable to an active geophone survey and S velocities are extracted for the first time in the area. Over 75% of the events in the USGS catalog in the area are detected, as well as a new earthquake.
UR - https://www.scopus.com/pages/publications/85121850262
U2 - 10.1190/segam2019-3214849.1
DO - 10.1190/segam2019-3214849.1
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AN - SCOPUS:85121850262
SN - 1052-3812
SP - 989
EP - 993
JO - SEG Technical Program Expanded Abstracts
JF - SEG Technical Program Expanded Abstracts
T2 - Society of Exploration Geophysicists International Exposition and 89th Annual Meeting, SEG 2019
Y2 - 15 September 2019 through 20 September 2019
ER -