测井技术2012，Vol.36Issue(5)：475-478,4.
微电极测井的三维有限元数值模拟
Simulation of Micro-electric Log Based on 3D FEM Method
南泽宇 1范晓敏 2宋瑛士 1张意3
作者信息
- 1. 吉林大学地球探测科学与技术学院,吉林长春130026
- 2. 中国石化石油勘探开发研究院,北京100083
- 3. 吉林大学白求恩第一医院,吉林长春130026
- 折叠
摘要
Abstract
The electric field and its distribution of micro-electric log is accurately calculated with 3-dimentional finite element method (FEM) and the relationship between log response and mud cake thickness and mud resistivity is calculated quantitatively. Established is a 3-dimentional finite element model for low resistivity mudstone where there are high resistivity permeable sandstones to simulate electric field distribution of micro-electric log. In order to quantitatively study the relationship between micro-electric log curves and mud cake thickness, established is a mud cake thickness model when the thickness changes from 0. 001 cm to 5 cm, and the correspondent micro-electric log response is computed. The calculated result shows that when the thickness is less than 1. 08 cm, positive separation of micro-electric log curves increases rapidly with the rise of the thickness. And the positive separation reaches peak value when the thickness is 1. 08 cm, and then the positive separation decreases gradually with the increase of the thickness. Established is a mud cake resistivity model with the resistivity changing from 0. 01 Q. ?m to 10 D, ?m so as to quantitatively study the relationship between micro-electric log curve and the thickness. The study shows that the mud cake resistivity can be calculated accurately when the drill bit program and caliper log curve are given. And this has important significance in log curve environment correction.关键词
微电极测井/三维有限元法/数值模拟/定量研究/泥饼/正幅度差Key words
micro-electric logging, 3-dimentional finite element method (FEM) , numerical simulation, quantitative study, mud cake, positive separation分类
天文与地球科学引用本文复制引用
南泽宇,范晓敏,宋瑛士,张意..微电极测井的三维有限元数值模拟[J].测井技术,2012,36(5):475-478,4.
