EMT simulation and effect of TTI anisotropic media in EMT signal

作     者：Qing-Yun Di Olalekan Fayemi Qi-Hui Zhen Tian Fei Qing-Yun Di;Olalekan Fayemi;Qi-Hui Zhen;Tian Fei

作者机构：Key Laboratory of Shale Gas and GeoengineeringInstitute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Frontier Technology and Equipment Development Center for Deep Resources ExplorationInstitute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Innovation Academy for Earth ScienceChinese Academy of SciencesBeijing 100029China College of Earth and Planetary SciencesUniversity of Chinese Academy of SciencesBejing 100049China 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2021年第18卷第1期

页      面：106-122页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 082002[工学-油气田开发工程] 

基　　金：Chinese Academy of Sciences  CAS  (XDA140500001) 

主　　题：Electromagnetic telemetry Finite difference method Anisotropy Gaussian quadrature 

摘      要：An axisymmetric finite difference method is employed for the simulations of electromagnetic telemetry in the homogeneous and layered underground *** this method,we defined the anisotropy property using extensive 2D conductivity tensor and solved it in the transverse magnetic *** simplification arises in the decoupling of the anisotropic *** developed method is cost-efficient,more straightforward in modeling anisotropic media,and easy to be *** addition,we solved the integral operation in the estimation of measured surface voltage using Gaussian quadrature *** performed a series of numerical modeling of EM telemetry signals in both isotropic and anisotropic *** with 2D tilt transverse isotropic media characterized by the tilt axis and anisotropy parameters shows an increase in the EMT signal with an increase in the angle of tilt of the principal axis for a moderate coefficient of *** show that the effect of the tilt of the subsurface medium can be observed with sufficient accuracy and that it is an order of magnitude of 5 over the tilt of 90 ***,consistent results with existing field data were obtained by employing the Gaussian quadrature rule for the computation of surface measured signal.