气候变化领域集成服务门户(CCPortal): Toward Retrieving Distributed Aquifer Hydraulic Parameters From Distributed Strain Sensing

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DOI	10.1029/2020JB020056
	Toward Retrieving Distributed Aquifer Hydraulic Parameters From Distributed Strain Sensing
	Zhang Y.; Lei X.; Hashimoto T.; Xue Z.
发表日期	2021
ISSN	21699313
卷号	126 期号:1
英文摘要	Subtle elastic rock deformation during aquifer testing may bear hydraulic parameter (permeability and compressibility) information owing to the poroelastic hydromechanical coupling effect. Here we report that such in situ rock deformations (∼50 µε) during an aquifer pumping test are successfully measured along a vertical well by a high-resolution fiber optic distributed strain sensing (DSS) tool with an accuracy of 0.5 µε. We investigate the feasibility of hydraulic parameter estimation at meter scale using DSS data through a coupled hydromechanical model. Both synthetic and field cases are tested with sensitivity analysis. The results indicate that the simultaneous estimation of permeability and compressibility using DSS data is possible at low noise levels. However, only non-global near-optimal solutions can be obtained using the applied gradient-based inversion algorithm, because of parameter crosstalk and sensitivity problems when the data contain large noise. In particular, estimation is difficult for zones with relatively low permeability due to the low sensitivity to the strain changes. The estimated permeability/compressibility structures for the field test are largely consistent with other geological information from well logs. Our study suggests that DSS data can be quite useful in aquifer characterization and fluid flow profiling in addition to geomechanical monitoring. The obtained hydraulic information is beneficial for the optimized reservoir management of water and oil/gas storage. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Compressibility; fiber optic distributed sensing; hydromechanical responses; inverse modeling; permeability; strain
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/187415
作者单位	Geological Carbon dioxide Storage Technology Research Association, Kyoto, Japan; Research Institute of Innovative Technology for the Earth (RITE), Kyoto, Japan; Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
推荐引用方式 GB/T 7714	Zhang Y.,Lei X.,Hashimoto T.,et al. Toward Retrieving Distributed Aquifer Hydraulic Parameters From Distributed Strain Sensing[J],2021,126(1).
APA	Zhang Y.,Lei X.,Hashimoto T.,&Xue Z..(2021).Toward Retrieving Distributed Aquifer Hydraulic Parameters From Distributed Strain Sensing.Journal of Geophysical Research: Solid Earth,126(1).
MLA	Zhang Y.,et al."Toward Retrieving Distributed Aquifer Hydraulic Parameters From Distributed Strain Sensing".Journal of Geophysical Research: Solid Earth 126.1(2021).