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TitleFluid injection and seismic activity in the Northern Montney Play, British Columbia, Canada, with special reference to the 17 August 2015 Mw 4.6 induced earthquake
AuthorBabaie Mahani, A; Schultz, R; Kao, H; Walker, D; Johnson, J; Salas, C
SourceBulletin of the Seismological Society of America vol. 107, (2017), no. 2, 2017 p. 542-552, https://doi.org/10.1785/0120160175
Year2017
Alt SeriesEarth Sciences Sector, Contribution Series 20160138
PublisherSeismological Society of America
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf
ProvinceBritish Columbia
NTS93N/01; 93N/02; 93N/07; 93N/08; 93N/09; 93N/10; 93N/15; 93N/16; 93O; 93P; 94A; 94B; 94C/01; 94C/02; 94C/07; 94C/08; 94C/09; 94C/10; 94C/15; 94C/16; 94F/01; 94F/02; 94F/07; 94F/08; 94F/09; 94F/10; 94F/15; 94F/16; 94G; 94H
Lat/Long WENS-125.0000 -120.0000 58.0000 55.0000
Subjectsgeophysics; fluid mechanics; seismicity; seismic zones; hydraulic fracturing; fracturing; earthquakes; earthquake studies; earthquake magnitudes
Illustrationslocation maps; graphs; tables
ProgramShale Gas - induced seismicity, Environmental Geoscience
AbstractIn this paper, 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 injections of gas and waste-water disposal). The earthquake sequence includes 676 events from 3 October 2014 to 31 December 2015 from Progress Energy earthquake catalogue 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 ~0.17 at confidence level close to 99.7% with a lag time between 0 and 2 days) than other types of injections. Using the double difference relocation technique, we obtained robust depth constraints for some of the events for which supplementary, industry-provided waveforms were available. The depths of these events ranged from 0.5 to 2.5 km and are mostly well constrained above the target zone where hydraulic fracturing was taking place. The best-fit moment tensor inversion for the event on 17 August 2015 with a moment magnitude of 4.6 shows a predominantly thrust mechanism in the northwest-southeast direction with a deeper focal depth (4 km) than the value obtained through double difference relocation for this event (1.3 km).
Summary(Plain Language Summary, not published)
Seismic activity in the northern Montney Play, northeast British Columbia, is analyzed in detail and its connection to fluid injection operations is investigated. Our dataset includes 676 events that occurred between 3 October 2014 and 31 December 2015, including the magnitude 4.6 earthquake of 17 August 2015. Spatial and temporal correlation of seismic activity with the fluid injection records in the region revealed that these events are better correlated with hydraulic fracturing than other types of injections. The depths of these events ranged from 0.5 to 2.5 km and are mostly well constrained above the target zone where hydraulic fracturing was taking place. The magnitude 4.6, 17 August 2015, earthquake was a thrust event with the fault plane in the northwest-southeast direction.
GEOSCAN ID299108