气候变化领域集成服务门户(CCPortal): On the Variability of Pressure Propagation During Hydraulic Stimulation Based on Seismic Velocity Observations

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DOI	10.1029/2019JB018801
	On the Variability of Pressure Propagation During Hydraulic Stimulation Based on Seismic Velocity Observations
	Schopper F.; Doetsch J.; Villiger L.; Krietsch H.; Gischig V.S.; Jalali M.; Amann F.; Dutler N.; Maurer H.
发表日期	2020
ISSN	21699313
卷号	125 期号:2
英文摘要	Permeability enhancement of a reservoir through hydraulic stimulation is ever so often accompanied by potentially hazardous induced seismicity. Monitoring of in situ pressure propagation remains an important step in understanding the underlying seismo-hydromechanical processes during hydraulic stimulation and mitigating hazardous induced seismicity. In an effort to monitor pressure propagation remotely, active seismic monitoring was performed during decameter-scale hydraulic stimulation experiments at the Grimsel Test Site in Switzerland. Using cross-correlation schemes, subtle traveltime variations that correlate well with the high-pressure fluid injections during hydraulic stimulation become apparent. The 4-D seismic tomograms obtained through time-lapse differential traveltime inversion reveal transient changes in the seismic velocity within the stimulated volume that depend on the effective stress. In-depth comparison of the seismic velocity variations and measured pressure data indicates that the seismic velocity variations can be used as a proxy for pressure propagation within an equilibrated system. Observations show that traveltime tomography is insensitive to isolated, high-pressure variations such as a breakthrough within the fracture network. Joint interpretation of the 4-D seismic tomograms with geological and hydromechanical data reveals fundamental differences between the different experiments due to a large variability in the rock mass response to the hydraulic stimulation. Using the observed velocity variations as a proxy for pressure propagation, we can infer characteristics of the shear zones and the rock volume at the Grimsel Test Site. The observed velocity variations provide not only information on the characteristics of the reservoir itself but also its response to different stimulation techniques. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	fluid injection; hydraulic stimulation; pressure propagation; rock deformation; seismic monitoring; seismic velocity changes
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/188012
作者单位	Department of Earth Sciences, ETH Zurich, Zurich, Switzerland; Swiss Seismological Service, ETH Zurich, Zurich, Switzerland; CSD Ingenieure AG, Liebefield, Liebefeld, Switzerland; Department of Engineering Geology and Hydrogeology, RWTH Aachen, Aachen, Germany; Center for Hydrogeology and Geothermics, University of Neuchâtel, Neuchâtel, Switzerland
推荐引用方式 GB/T 7714	Schopper F.,Doetsch J.,Villiger L.,et al. On the Variability of Pressure Propagation During Hydraulic Stimulation Based on Seismic Velocity Observations[J],2020,125(2).
APA	Schopper F..,Doetsch J..,Villiger L..,Krietsch H..,Gischig V.S..,...&Maurer H..(2020).On the Variability of Pressure Propagation During Hydraulic Stimulation Based on Seismic Velocity Observations.Journal of Geophysical Research: Solid Earth,125(2).
MLA	Schopper F.,et al."On the Variability of Pressure Propagation During Hydraulic Stimulation Based on Seismic Velocity Observations".Journal of Geophysical Research: Solid Earth 125.2(2020).