DOI: 10.1016/j.tecto.2020.228393
论文题名: Newly emerging cases of hydraulic fracturing induced seismicity in the Duvernay East Shale Basin
作者: Schultz R. ; Wang R.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2020
卷: 779 语种: 英语
中文关键词: 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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170706
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Schultz R.,Wang R.. Newly emerging cases of hydraulic fracturing induced seismicity in the Duvernay East Shale Basin[J]. Tectonophysics,2020-01-01,779