3D FEM simulation of responses of LWD multi-mode resistivity imaging sonde

作     者：Kang Zheng-Ming Ke Shi-Zhen Li Xin Mi Jin-Tai Ni Wei-Ning Li Ming-Yu 康正明;柯式镇;李新;米金泰;倪卫宁;李铭宇

作者机构：中国石油大学(北京)油气资源与探测国家重点实验室北京102249 中国石油大学(北京)地球物理与信息工程学院北京102249 中国石化石油工程技术研究院北京100101 

基　　金：sponsored by Study on High-Precision Logging While Drilling Imaging Technology of Low-Permeability Reservoirs(No.2016ZX05021-002) 

出 版 物：《Applied Geophysics》 (应用地球物理（英文版）)

年 卷 期：2018年第15卷第3期

页      码：401-412页

摘      要：A new multi-mode resistivity imaging sonde, with toroidal coils as source, can conduct three resistivity measurements: azimuthal resistivity, lateral resistivity, and bit resistivity measurements. Thus, the logging time and cost are greatly saved. The toroidal coils are simplified as an extended voltage dipole and the response equations are derived for a homogenous formation. Based on 3D FEM, the depth of investigation(DOI), vertical resolution, circumferential azimuthal capacity, borehole diameter, mud resistivity, thickness of target formation, and the resistivity of the surrounding formation and mud invasion are simulated. The results suggest that the three measurement modes of the new sonde are different in vertical resolutions and DOIs. The circumferential detection ability of the azimuth button depends on the contrast between the anomaly and formation resistivity and the open angle of the anomaly. Whether the borehole is truncated at the bit or not has a great influence on the simulation results. The borehole and mud invasion affect the apparent resistivity in all modes, but the effects of resistivity of surrounding formation and thickness of the target formation are only corrected for lateral resistivity measurement.

主 题 词：3D FEM LWD multi-mode resistivity imaging detection characteristics environmental effects 

学科分类：07[理学] 

核心收录：

D　O　I：10.1007/s11770-018-0692-7

馆 藏 号：203454285...