干旱区生态环境知识资源中心(Arid): Domain decomposition based integral equation modeling of 3-dimensional topography in frequency domain for well electromagnetic field

Arid

DOI	10.7498/aps.68.20190330
	Domain decomposition based integral equation modeling of 3-dimensional topography in frequency domain for well electromagnetic field
	Li Jing-He 1; He Zhan-Xiang 2; Meng Shu-Jun 1; Yang Jun 1; Li Wen-Jie 1; Liao Xiao-Qian 1
通讯作者	Li Jing-He
来源期刊	ACTA PHYSICA SINICA
ISSN	1000-3290
出版年	2019
卷号	68 期号:14
英文摘要	As an efficient geophysical exploration technology, well electromagnetic method is particularly applicable to oil and gas exploration in China's complex terrain areas (deserts, mountains, etc.). A serious influence of topographic relief area on the electromagnetic response of well is inevitable but challenging. To the best of our knowledge, there is no literature on modeling the electromagnetic response of three-dimensional (3D) topography with well electromagnetic method. Based on the domain decomposition, an integral equation method is presented to simulate the electromagnetic response of 3D topography in frequency domain via the well electromagnetic method. Compared with the finite difference and finite element method based on partial differential equation, this method is very efficient in simulating topographic response without huge computation or truncation boundary error accumulation or special boundary condition requirements. Firstly, an induction coefficient is defined according to the topographic relief situation. Then the computational domain consisting of the target body, background medium and 3D topography is divided into reference model, background medium and the distribution of target body medium area. According to the characteristics of each sub-region, Anderson algorithm is an analytic solution based on Gaussian filtering, which is used to provide the primary field from the excited sources in surface. And then, the stable double conjugate gradient-fast Fourier transform is incorporated into integral equation algorithm to obtain the fast 3D terrain shaft frequency domain electromagnetic responses. By comparing the calculation results using the new algorithm presented in this paper with the analytical solutions of Anderson algorithm for half-space model with surface electromagnetic method, the precision and the efficiency of this new algorithm are demonstrated. And the ability to model the electromagnetic responses of 3D topography is shown by comparing with the published results of 3D boundary integral equation. Thus, the high accuracy and high efficiency of the new algorithm presented in this paper are validated. Finally, the influence of 3D valley topography on electromagnetic field response of surface to borehole electromagnetic (SBEM) observation system is presented and analyzed. It is observed that the response of SBEM is seriously disturbed by the field of 3D valley topography which is necessarily removed. The research results presented in this paper are of significance for guiding the identification and correction of electromagnetic topographic effect from 3D SBEM.
英文关键词	domain decomposition based integral equation response of 3-dimensional topography well electromagnetic surface to borehole electromagnetic
类型	Article
语种	中文
国家	Peoples R China
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000476706900002
WOS关键词	VOLUME ; EM
WOS类目	Physics, Multidisciplinary
WOS研究方向	Physics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/213859
作者单位	1.Guilin Univ Technol, Coll Earth Sci, Guilin 541004, Peoples R China; 2.Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen 518055, Peoples R China
推荐引用方式 GB/T 7714	Li Jing-He,He Zhan-Xiang,Meng Shu-Jun,et al. Domain decomposition based integral equation modeling of 3-dimensional topography in frequency domain for well electromagnetic field[J],2019,68(14).
APA	Li Jing-He,He Zhan-Xiang,Meng Shu-Jun,Yang Jun,Li Wen-Jie,&Liao Xiao-Qian.(2019).Domain decomposition based integral equation modeling of 3-dimensional topography in frequency domain for well electromagnetic field.ACTA PHYSICA SINICA,68(14).
MLA	Li Jing-He,et al."Domain decomposition based integral equation modeling of 3-dimensional topography in frequency domain for well electromagnetic field".ACTA PHYSICA SINICA 68.14(2019).