Velocity analysis and moveout-based event detection using downhole DAS records

Ariel Lellouch; Siyuan Yuan; Zack Spica; Biondo Biondi; William L. Ellsworth

doi:10.1190/segam2019-3214849.1

Velocity analysis and moveout-based event detection using downhole DAS records

Ariel Lellouch^*
, Siyuan Yuan
, Zack Spica
, Biondo Biondi
, William L. Ellsworth

^*Corresponding author for this work

Stanford University

Research output: Contribution to conference › Paper › peer-review

Abstract

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.

Original language	English
Pages	989-993
Number of pages	5
DOIs	https://doi.org/10.1190/segam2019-3214849.1
State	Published - 2020
Externally published	Yes
Event	Society of Exploration Geophysicists International Exposition and Annual Meeting 2019, SEG 2019 - San Antonio, United States Duration: 15 Sep 2019 → 20 Sep 2019

Conference

Conference	Society of Exploration Geophysicists International Exposition and Annual Meeting 2019, SEG 2019
Country/Territory	United States
City	San Antonio
Period	15/09/19 → 20/09/19

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10.1190/segam2019-3214849.1

Cite this

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title = "Velocity analysis and moveout-based event detection using downhole DAS records",

abstract = "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 \textasciitilde{}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.",

author = "Ariel Lellouch and Siyuan Yuan and Zack Spica and Biondo Biondi and Ellsworth, \{William L.\}",

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doi = "10.1190/segam2019-3214849.1",

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AU - Lellouch, Ariel

AU - Yuan, Siyuan

AU - Spica, Zack

AU - Biondi, Biondo

AU - Ellsworth, William L.

PY - 2020

Y1 - 2020

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/85079480531

U2 - 10.1190/segam2019-3214849.1

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T2 - Society of Exploration Geophysicists International Exposition and Annual Meeting 2019, SEG 2019

Y2 - 15 September 2019 through 20 September 2019

ER -

Velocity analysis and moveout-based event detection using downhole DAS records

Abstract

Conference

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