气候变化领域集成服务门户(CCPortal): States of In Situ Stress in the Duvernay East Shale Basin and Willesden Green of Alberta, Canada: Variable In Situ Stress States Effect Fault Stability

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DOI	10.1029/2020JB021221
	States of In Situ Stress in the Duvernay East Shale Basin and Willesden Green of Alberta, Canada: Variable In Situ Stress States Effect Fault Stability
	Shen L.W.; Schmitt D.R.; Wang R.; Hauck T.E.
发表日期	2021
ISSN	21699313
卷号	126 期号:6
英文摘要	Fault slip is controlled by the normal and shear tractions on a fault plane. A full understanding of the factors influencing induced seismicity requires quantitative knowledge of the in situ stress tensor and fluid pressure. We analyze these variables for a 200 × 200 km region with active hydraulic fracturing near the city of Red Deer, Canada. The levels of induced seismicity in the area were generally low before March 4, 2019, when local residents felt the MW 3.8/ML 4.2 event. We use geophysical logs and pressure tests within the targeted Duvernay Formation to construct maps of ambient pore pressure, vertical and minimum horizontal stresses. The maximum horizontal stress is constrained by the focal mechanism inversion and borehole-based estimation method. We find that a broad range of orientations are susceptible to slip and small perturbations of fluid pressure would promote displacement. This suggests that the differential variations in pore fluid pressure in the target formation may provide a metric of slip susceptibility; a map for the study area is developed. Areas of high susceptibility correlate with those experiencing higher levels of induced seismicity, except for the Willesden Green oil field that has similarly elevated susceptibility and active hydraulic fracturing operations. The methods and results demonstrate how more quantitatively constrained in situ stresses developed from an ensemble of real field measurements can assist in assessing fault stability and in developing metrics for slip susceptibility. © 2021. American Geophysical Union. All Rights Reserved.
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187052
作者单位	Institute of Geophysical Research, Department of Physics, University of Alberta, Edmonton, AB, Canada; Alberta Geological Survey, Alberta Energy Regulator, Edmonton, AB, Canada; Now at Department of Earth, Atmospheric and Planetary Science, Purdue University, West Lafayette, IN, United States; Department of Earth and Planetary Science, University of New Mexico, Albuquerque, NM, United States
推荐引用方式 GB/T 7714	Shen L.W.,Schmitt D.R.,Wang R.,et al. States of In Situ Stress in the Duvernay East Shale Basin and Willesden Green of Alberta, Canada: Variable In Situ Stress States Effect Fault Stability[J],2021,126(6).
APA	Shen L.W.,Schmitt D.R.,Wang R.,&Hauck T.E..(2021).States of In Situ Stress in the Duvernay East Shale Basin and Willesden Green of Alberta, Canada: Variable In Situ Stress States Effect Fault Stability.Journal of Geophysical Research: Solid Earth,126(6).
MLA	Shen L.W.,et al."States of In Situ Stress in the Duvernay East Shale Basin and Willesden Green of Alberta, Canada: Variable In Situ Stress States Effect Fault Stability".Journal of Geophysical Research: Solid Earth 126.6(2021).