气候变化领域集成服务门户(CCPortal): Geodetic imaging of ground deformation and reservoir parameters at the Yangbajing Geothermal Field, Tibet, China

CCPortal

DOI	10.1093/gji/ggad018
	Geodetic imaging of ground deformation and reservoir parameters at the Yangbajing Geothermal Field, Tibet, China
	Zhang, Yinpeng; Xiang, Wei; Liu, Guoxiang; Wang, Xiaowen; Zhang, Rui; Zhang, Xue; Tong, Jinzhao; Yuan, Hailun; Zhang, Can
发表日期	2023
ISSN	0956-540X
EISSN	1365-246X
起始页码	379
结束页码	394
卷号	234 期号:1
英文摘要	Monitoring and modeling ground surface deformation are crucial for the dynamic assessment of geothermal resources and sustainable exploitation in a geothermal field. In this study, we extract the deformation in the Yangbajing geothermal field by the small baseline-synthetic aperture radar interferometry (SBAS-InSAR) method using 141 Sentinel-1A images collected between March 2017 and November 2021. The InSAR result indicates both uplift and subsidence in the geothermal field. Subsequently, we use a dual-source model combining a dipping ellipsoid and a rectangular surface to model the shallow reservoir that contracted to cause the complex subsidence field in the north of the geothermal field. The shallow reservoir that expanded to cause the uplift in the south is modeled by an ellipsoid source. The parameters inversion is processed by the nonlinear Bayesian inversion method which has been applied to search the optimal parameters setting in a priori space and evaluate the uncertainties by the confidence intervals. To validate our inversion results, we collect the data from 31 wells including extraction and injection wells, detailed tectonic survey data and geothermal isotherms of the Yangbajing geothermal field. The modeled shallow reservoir in the north is within a 140 degrees C ground isotherm and a 160 degrees C underground isotherm. The thickness and depth of the reservoir slightly exceed the data from producing wells, probably due to the structural subsidence of the reservoir. The geometric structure is consistent with the channel faults that control the formation and development of the shallow reservoirs. The modeled reservoir under the rebound area in the south is also validated by comparing the data. Furthermore, we estimate the volume loss and recovery of the contracting and expanding reservoirs. We analyse the deformation mechanisms by considering the tectonic formation, the reservoir structure, and the extraction and rechargeability of the reservoirs. This research suggests the deformation pattern of shallow porous reservoirs that have similar layer composition and tectonic structure elsewhere in the world. Moreover, it provides a theoretical model to explore the parameters and volume change of geothermal reservoirs in plateau-embedded basins around the world. Our work is significant for the conservation and development of geothermal energy in geothermal fields that experience deformation, both subsidence and uplift.
关键词	Geothermal reservoirs Hydrothermal systems Creep and deformation Radar interferometry Heat flow Mechanics theory and modelling
英文关键词	SURFACE DEFORMATION; SATELLITE RADAR; CALIFORNIA; SUBSIDENCE; ALGORITHM; ICELAND; MODEL; AREA; GPS
WOS研究方向	Geochemistry & Geophysics
WOS记录号	WOS:000945861500002
来源期刊	GEOPHYSICAL JOURNAL INTERNATIONAL
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283439
作者单位	Southwest Jiaotong University; Chinese Academy of Sciences; Southwest Jiaotong University
推荐引用方式 GB/T 7714	Zhang, Yinpeng,Xiang, Wei,Liu, Guoxiang,et al. Geodetic imaging of ground deformation and reservoir parameters at the Yangbajing Geothermal Field, Tibet, China[J],2023,234(1).
APA	Zhang, Yinpeng.,Xiang, Wei.,Liu, Guoxiang.,Wang, Xiaowen.,Zhang, Rui.,...&Zhang, Can.(2023).Geodetic imaging of ground deformation and reservoir parameters at the Yangbajing Geothermal Field, Tibet, China.GEOPHYSICAL JOURNAL INTERNATIONAL,234(1).
MLA	Zhang, Yinpeng,et al."Geodetic imaging of ground deformation and reservoir parameters at the Yangbajing Geothermal Field, Tibet, China".GEOPHYSICAL JOURNAL INTERNATIONAL 234.1(2023).