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DOI	10.1016/j.tecto.2020.228393
	Newly emerging cases of hydraulic fracturing induced seismicity in the Duvernay East Shale Basin
	Schultz R.; Wang R.
发表日期	2020
ISSN	00401951
卷号	779
英文摘要	Hydraulic fracturing (HF) in the Duvernay Formation near Fox Creek, Alberta, Canada, has produced some of the most prolific clusters of induced seismicity. In this paper, we describe newly emerging clusters of events occurring in previously quiescent (and undeveloped) areas of the Duvernay Formation. In the Duvernay East Shale Basin, an industry supplemented waveform database is examined using a variety of seismological techniques. Here, strike-slip events as large as 4.18 ML have been felt in nearby cities. Temporal relationships suggest these clusters are almost certainly (>99.7% confidence) caused by nearby HF. Spatially, these earthquakes tend to occur in the strata directly overlying the Duvernay Formation and laterally near a horizontal well. One exceptional cluster clearly delineates a 1.5 km offset between its centroid and the inducing horizontal well, raising questions about the earthquake triggering mechanism. Westward in the Duvernay, two minor clusters within the Willesden Green region appear to be tenuously related to HF completions. This study also places constraints on the structural geology of faulting occurring in the Rocky Mountain House Seismogenic Zone – a region of induced seismicity related to secondary recovery in the Strachan D-3A pool. Here, our moment tensors and double difference relocations describe thrust-slip on a fault underlying the target formation. Last, the largest event (4.27 ML) in our study area was likely natural, due to its deeper hypocentral depth (~15 km) and non-correspondence with industrial operations. Overall, the newly emerging clusters are consistent with reactivation of basement rooted faults. © 2020 Elsevier B.V.
关键词	Duvernay Formation Hydraulic fracturing Induced seismicity
英文关键词	Earthquakes; Faulting; Fracture; Horizontal wells; Hydraulic fracturing; Secondary recovery; Shale; Structural geology; Double differences; Duvernay Formation; Earthquake triggering; Industrial operations; Seismogenic zones; Strike-slip events; Temporal relationships; Waveform database; Induced Seismicity
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207873
作者单位	Alberta Geological Survey, Alberta Energy Regulator, Edmonton, AB, Canada; Department of Geophysics, Stanford University, Stanford, CA, United States; Department of Earth Sciences, University of Western OntarioON, Canada; Department of Earth & Planetary Sciences, University of New Mexico, Albuquerque, NM, United States
推荐引用方式 GB/T 7714	Schultz R.,Wang R.. Newly emerging cases of hydraulic fracturing induced seismicity in the Duvernay East Shale Basin[J],2020,779.
APA	Schultz R.,&Wang R..(2020).Newly emerging cases of hydraulic fracturing induced seismicity in the Duvernay East Shale Basin.Tectonophysics,779.
MLA	Schultz R.,et al."Newly emerging cases of hydraulic fracturing induced seismicity in the Duvernay East Shale Basin".Tectonophysics 779(2020).