Three-dimensional audio-magnetoteiluric sounding in monitoring coalbed   methane reservoirs

doi:10.1016/jjappgeo.2017.01.028

CORC > 北京大学 > 地球与空间科学学院

	Three-dimensional audio-magnetoteiluric sounding in monitoring coalbed methane reservoirs
	Wang, Nan ; Zhao, Shanshan ; Hui, Jian ; Qin, Qiming
刊名	JOURNAL OF APPLIED GEOPHYSICS
	2017
关键词	Coalbed methane (CBM) Audio-magnetotelluric (AMT) Three-dimensional (3-D) inversion Dynamic monitoring Qinshui ModEM SOUTHERN QINSHUI BASIN AUDIOMAGNETOTELLURIC DATA INVERSION GAS CHINA WATER AVO PERMEABILITY PREDICTION SYSTEM
DOI	10.1016/jjappgeo.2017.01.028
英文摘要	Audio-magnetotelluric (AMT) sounding is widely employed in rapid resistivity delineation of objective geometry in near surface exploration. According to reservoir patterns and electrical parameters obtained in Qinshui Basin, China, two-dimensional and three-dimensional synthetic "objective anomaly" models were designed and inverted with the availability of a modular system for electromagnetic inversion (ModEM). The results revealed that 3-D full impedance inversion yielded the subsurface models closest to synthetic models. One or more conductive targets were correctly recovered. Therefore, conductive aquifers in the study area, including hydrous coalbed methane (CBM) reservoirs, were suggested to be the interpretation signs for reservoir characterization. With the aim of dynamic monitoring of CBM reservoirs, the AMT surveys in continuous years (June 2013 May 2015) were carried out. 3-D inversion results demonstrated that conductive anomalies accumulated around the producing reservoirs at the corresponding depths if CBM reservoirs were in high water production rates. In contrast, smaller conductive anomalies were generally identical with rapid gas production or stopping production of reservoirs. These analyses were in accordance with actual production history of CBM wells. The dynamic traces of conductive anomalies revealed that reservoir water migrated deep or converged in axial parts and wings of folds, which contributed significantly to formations of CBM traps. Then the well spacing scenario was also evaluated based on the dynamic production analysis. Wells distributed near closed faults or flat folds, rather than open faults, had CBM production potential to ascertain stable gas production. Therefore, three-dimensional AMT sounding becomes an attractive option with the ability of dynamic monitoring of CBM reservoirs, and lays a solid foundation of quantitative evaluation of reservoir parameters. (C) 2017 Elsevier B.V. All rights reserved.; National Science and Technology Major Project of China [2011ZX05034-02]; China Scholarship Council (CSC); SCI(E); ARTICLE; 198-209; 138
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/474852]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Wang, Nan,Zhao, Shanshan,Hui, Jian,et al. Three-dimensional audio-magnetoteiluric sounding in monitoring coalbed methane reservoirs[J]. JOURNAL OF APPLIED GEOPHYSICS,2017.
APA	Wang, Nan,Zhao, Shanshan,Hui, Jian,&Qin, Qiming.(2017).Three-dimensional audio-magnetoteiluric sounding in monitoring coalbed methane reservoirs.JOURNAL OF APPLIED GEOPHYSICS.
MLA	Wang, Nan,et al."Three-dimensional audio-magnetoteiluric sounding in monitoring coalbed methane reservoirs".JOURNAL OF APPLIED GEOPHYSICS (2017).