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Fluid injection and seismic activity in the northern Montney Play, British Columbia, Canada, with special reference to the 17 August 2015 M (sub W) 4.6 induced earthquake

Alireza Babaie Mahani, Ryan Schultz, Honn Kao, Dan Walker, Jeff Johnson and Carlos Salas
Fluid injection and seismic activity in the northern Montney Play, British Columbia, Canada, with special reference to the 17 August 2015 M (sub W) 4.6 induced earthquake
Bulletin of the Seismological Society of America (April 2017) 107 (2): 542-552

Abstract

In this article, we analyzed the recent seismic activity in the northern Montney Play of British Columbia in 2015 and its connection with fluid injection (hydraulic fracturing and long-term injection of gas and wastewater disposal) in the region. The earthquake sequence used in this study includes 676 events from 3 October 2014 to 31 December 2015 from the Progress Energy earthquake catalog with moment magnitude as small as 1. Spatial and temporal correlation of seismic activity with the fluid injection in the region revealed that these events are better correlated with hydraulic fracturing (correlation coefficient of approximately 0.17 at confidence level close to 99.7%, with a lag time between 0 and 2 days) than other types of injection. Using the double-difference relocation technique, we obtained depth constraints for some of the events for which supplementary, industry-provided waveforms were available. The depths of these events range from 0.5 to 2.5 km and are mostly constrained above the target zone where hydraulic fracturing was taking place. The best-fit moment tensor solution for the event on 17 August 2015 gives a moment magnitude of 4.6 and a predominantly thrust mechanism in the northwest-southeast direction with a shallow focal depth of 4 km. This is consistent with that obtained through double-difference relocation for this event (1.3 km), given the depth uncertainty of the moment tensor inversion. Electronic Supplement: Tables of injection volumes and seismicity parameters, and figure of monthly distribution of seismic events and location of fluid injection sites in the vicinity of the 17 August 2015 M (sub w) 4.6 event.


ISSN: 0037-1106
EISSN: 1943-3573
Coden: BSSAAP
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 107
Serial Issue: 2
Title: Fluid injection and seismic activity in the northern Montney Play, British Columbia, Canada, with special reference to the 17 August 2015 M (sub W) 4.6 induced earthquake
Affiliation: Geoscience BC, Vancouver, BC, Canada
Pages: 542-552
Published: 201704
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 33
Accession Number: 2017-037573
Categories: SeismologyEconomic geology, geology of energy sources
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sketch map
N55°00'00" - N58°00'00", W125°00'00" - W120°00'00"
Secondary Affiliation: Alberta Geological Survey, CAN, CanadaCanadian Geological Survey, CAN, CanadaBritish Columbia Oil & Gas Commission, CAN, Canada
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201721
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