套管井脉冲源磁场特性的有限元分析

全文: PDF(364 KB)
输出: BibTeX | EndNote (RIS)

摘要

利用有限元法对套管井中脉冲源的磁场分布进行数值模拟,并讨论了套管相对磁导率,套管厚度以及脉冲时宽对磁场分布的影响。模拟结果表明,脉冲源套管井中磁场信号分为早期信号和晚期信号,早期信号衰减剧烈,主要为无用信号和高频的有用信号,晚期信号主要为低频的有用信号,衰减缓慢,可较好地反映地层信息;套管相对磁导率较大时磁场强度小,套管相对磁导率较小时磁场强度较大,但衰减很剧烈,不稳定,所以适中的套管相对磁导率更有利于测量。

	服务

	把本文推荐给朋友
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章

Abstract：

The magnetic field of pulse source in the cased hole was analyzed by the finite element method. The effect of relative magnetic permeability of casing, casing thickness and the pulse width on the magnetic field distribution was discussed. The magnetic field in pulsed cased hole is considered as two parts in time domain: early signal and late signal. The early signal decreases obviously and includes mainly the useless signals and high frequency part of useful signal. The late signal is the low frequency part of useful signal and decreases slowly, thus containing the information of strata. The magnetic intensity is small when relative magnetic permeability of casing is very large. When the relative magnetic permeability of casing is small, the magnetic intensity is large but decreases drastically. The measurement is more favorable for the moderate relative magnetic permeability of casing.

收稿日期: 2010-06-10 出版日期: 2011-10-15

P631.8

基金资助:

国家自然科学基金项目(No.40727001)

作者简介: 虞兵(1987-),男,2010年毕业于长江大学勘查技术与工程专业。

引用本文:

虞兵, 刘迪仁, 于新娟, 蔡明, 郑占树, 许巍. 套管井脉冲源磁场特性的有限元分析[J]. 物探与化探, 2011, 35(5): 689-691.
YU Bing, LIU Di-ren, YU Xin-juan, CAI Ming, ZHENG Zhan-shu, XU Wei. THE FINITE ELEMENT ANALYSIS OF MAGNETIC FIELD CHARACTERISTICS OF THE CASED HOLE WITH PULSE SOURCE. Geophysical and Geochemical Exploration, 2011, 35(5): 689-691.

链接本文:

https://www.wutanyuhuatan.com/CN/ 或 https://www.wutanyuhuatan.com/CN/Y2011/V35/I5/689

[1] P.Van der wal Schlumberger.Recent progress on formation resistivity measurement through casing
[J].SPWLA 41st Annual Logging Symposium,2000:4-7.

[2] 刘志新,于景村,郭栋.矿井瞬变电磁法在水文钻孔探测中的应用
[J].物探与化探,2006,30(1).

[3] Kim H J,Lee K H.Electromagnetic fields in a non-uniform steel-cased borehole
[J].Geophysical prospecting,2006,54(4).

[4] Lee K H,Kim H J, Uchida Toshihiro.Electromagnetic fields in a steel-cased borehole
[J].Geophysical prospecting,2005,53(1).

[5] 刘迪仁,徐建华.套管井中直流环的响应及其应用研究
[J].石油地球物理勘探,1998,33(4).

[6] 薛国强,李貅,底青云.瞬变电磁法正反演问题研究进展
[J].地球物理学进展,2008,23(4).

[7] 李汝传,王书民,孙鸿雁.用混合算法计算电偶源瞬变电磁响应
[J].物探与化探,2002,26(3).

[8] 陈明生,闫述,傅君眉.瞬变电磁场的直接时域数值分析
[J].地球物理学报,2002, 45(2).

[9] 董晓龙,汪文秉.瞬态电磁学的新进展—超宽带、短脉冲电磁学的理论和应用
[J].电子科技导报,1997,(12).

[10] 陈本池,周凤桐,李金铭.瞬变电磁场的波场变换研究
[J].物探与化探,1999,23(3).

[11] 周仕新, 岳建华.巷道围岩中瞬变电磁场三维数值模拟
[J].物探与化探,2005,29(6).

[1]	马战军, 王小冬. 反褶积法在花岗岩型铀矿床伽马测井资料解释中的几点认识[J]. 物探与化探, 2011, 35(5): 630-633.
[2]	张莹, 潘保芝. 支持向量机与微电阻率成像测井识别火山岩岩性[J]. 物探与化探, 2011, 35(5): 634-638,642.
[3]	杨薇, 刘四新, 冯彦谦. 跨孔层析成像LSQR算法研究[J]. 物探与化探, 2008, 32(2): 199-202.
[4]	甘伏平, 李金铭, 黎华清, 卢呈杰, 韦吉益. 跨孔电磁波透视法在岩溶探测中的应用[J]. 物探与化探, 2006, 30(4): 303-307.
[5]	卢毓周, 徐磊, 魏斌, 王晓锋. 利用流动单元计算高含水油田渗透率[J]. 物探与化探, 2004, 28(2): 156-158.
[6]	王祝文, 刘菁华, 李舟波, 陆敬安, 门少华. 大陆科学钻探测井岩石物理参数的提取[J]. 物探与化探, 2002, 26(4): 268-272.
[7]	邱庆程, 李伟和. 跨孔地震CT层析成像在岩溶勘察中的应用[J]. 物探与化探, 2001, 25(3): 236-240.
[8]	石雨田, 潘保芝. 分维的应用——定量描述裂缝发育程度[J]. 物探与化探, 2000, 24(6): 426-430.