气候变化领域集成服务门户(CCPortal): Hydraulic Injection-Induced Velocity Changes Revealed by Surface Wave Coda and Polarization Data at a Shale Play Site in Southwest China

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DOI	10.1029/2019JB019169
	Hydraulic Injection-Induced Velocity Changes Revealed by Surface Wave Coda and Polarization Data at a Shale Play Site in Southwest China
	Zhang Y.; Niu F.; Tao K.; Ning J.; Chen H.; Tang Y.
发表日期	2020
ISSN	21699313
卷号	125 期号:10
英文摘要	We investigated temporal variations of seismic wave velocity associated with hydraulic fracturing using Green's functions computed from ambient noise data. In October and November of 2014, we set up a broadband array at a shale play site inside the Sichuan basin where a pilot horizontal drilling and hydraulic injections were conducted. We first computed cross-correlation functions using continuous data recorded by 21 three-component broadband sensors deployed around the treatment well. We then employed a running window correlation-based coda wave interferometry technique to measure apparent velocity changes from the daily Green's functions of all the station pairs in the frequency range of 1 to 3 Hz. We found significant velocity changes right after the hydraulic fracturing, which exhibited a clear direction-dependent pattern. S wave velocity along raypaths parallel to the well trajectory showed a clear increase while those perpendicular exhibited a small decrease. The anisotropic changes in seismic velocity observed here were also confirmed from surface wave horizontal particle motion data. By comparing our observations with normal stress changes calculated with a half-space elastic model, we speculate that stress changes induced by the hydraulic fracturing were likely to be responsible for the observed anisotropic changes in seismic velocity. Our results suggest that time-lapse seismic imaging with ambient noise data provides a promising probe for monitoring geomechanical changes related to exploitation of unconventional oil and gas resources. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	ambient noise Green's function; azimuthal seismic anisotropy; coda wave interferometry; fracture alignment; hydraulic fracturing; surface wave horizontal polarization
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/187556
作者单位	Institute of Theoretical and Applied Geophysics, Peking University, Beijing, China; Department of Earth, Environmental and Planetary Sciences, William Marsh Rice University, Houston, TX, United States; State Key Laboratory of Petroleum Resources and Prospecting and Unconventional Petroleum Research Institute, China University of Petroleum at Beijing, Beijing, China
推荐引用方式 GB/T 7714	Zhang Y.,Niu F.,Tao K.,et al. Hydraulic Injection-Induced Velocity Changes Revealed by Surface Wave Coda and Polarization Data at a Shale Play Site in Southwest China[J],2020,125(10).
APA	Zhang Y.,Niu F.,Tao K.,Ning J.,Chen H.,&Tang Y..(2020).Hydraulic Injection-Induced Velocity Changes Revealed by Surface Wave Coda and Polarization Data at a Shale Play Site in Southwest China.Journal of Geophysical Research: Solid Earth,125(10).
MLA	Zhang Y.,et al."Hydraulic Injection-Induced Velocity Changes Revealed by Surface Wave Coda and Polarization Data at a Shale Play Site in Southwest China".Journal of Geophysical Research: Solid Earth 125.10(2020).