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An investigation of seismicity induced by hydraulic fracturing in the Sichuan Basin of China based on data from a temporary seismic network

Meng Lingyuan, Arthur McGarr, Zhou Longquan and Zang Yang
An investigation of seismicity induced by hydraulic fracturing in the Sichuan Basin of China based on data from a temporary seismic network
Bulletin of the Seismological Society of America (February 2019) 109 (1): 348-357

Abstract

Hydraulic fracturing has been inferred to trigger the majority of injection-induced seismicity in the Zhaotong and Changning shale gas field, Sichuan basin of China, in contrast to the Midwestern United States, where massive wastewater disposal has been the dominant triggering mechanism. More than 15,000 earthquakes, with magnitudes ranging up to M (sub w) 4.7, were recorded by a temporary network in the Sichuan basin for three years, with a completeness magnitude of M (sub L) 1.1. A catalog of earthquakes relocated with code tomoDD, combined with comprehensive injection data during an eight day period, shows that the earthquakes were highly correlated spatiotemporally with hydraulic fracturing activities mostly from a single well pad. Three M (sub L) > or =4.0 events occurred during hydraulic fracturing operations from 12 to 19 January 2017, followed by the fourth and largest event, with moment magnitude (M (sub w) ) 4.7, on 28 January. The hypocenters of the four largest events were located in dolomite of Cambrian age, between a shale gas reservoir and the top of the crystalline basement rocks. This was found to be similar to 60% of the smaller earthquakes in this cluster, at depths from 2.5 to 4.0 km.


ISSN: 0037-1106
EISSN: 1943-3573
Coden: BSSAAP
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 109
Serial Issue: 1
Title: An investigation of seismicity induced by hydraulic fracturing in the Sichuan Basin of China based on data from a temporary seismic network
Affiliation: China Earthquake Networks Center, Beijing, China
Pages: 348-357
Published: 201902
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 26
Accession Number: 2019-010940
Categories: SeismologyEconomic geology, geology of energy sources
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, sketch maps
N28°00'00" - N28°10'00", E104°30'00" - E105°00'00"
Secondary Affiliation: U. S. Geological Survey, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201908
Program Name: USGSOPNon-USGS publications with USGS authors
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