| 套管井脉冲源磁场特性的有限元分析 |
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| 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. |
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| 作者姓名： | 虞兵 刘迪仁 于新娟 蔡明 郑占树 许巍 |
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| 作者单位： | 长江大学油气资源与勘探技术教育部重点实验室,湖北荆州434023;长江大学地球物理与石油资源学院,湖北荆州434023 |
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| 基金项目： | 国家自然科学基金项目(No.40727001) |
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| 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。
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| 关 键 词： | 脉冲源 套管井 井中磁场 有限元数值模拟 数值分析 |
THE FINITE ELEMENT ANALYSIS OF MAGNETIC FIELD CHARACTERISTICS OF THE CASED HOLE WITH PULSE SOURCE |
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| 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[J].Geophysical and Geochemical Exploration,2011,35(5):689-691. |
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| Authors: | YU Bing LIU Di-ren YU Xin-juan CAI Ming ZHENG Zhan-shu XU Wei |
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| Institution: | YU Bing1,2,LIU Di-ren1,YU Xin-juan1,CAI Ming1,ZHENG Zhan-shu1,XU Wei1,2 (1.Key Laboratory of Exploration Technologies for Oil and Gas Resources of Ministry of Education,Yangtze University,Jingzhou 434023,China,2.School of Geophysics and Oil Resources,China) |
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| 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 u... |
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| Keywords: | pulse source cased hole borehole magnetic field finite element numerical simulation numerical analysis |
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