| 源和勘探区间导电体对有源电磁勘探影响的2D数值模拟研究(英文) |
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| 引用本文： | 王若,王妙月,底青云,王光杰.源和勘探区间导电体对有源电磁勘探影响的2D数值模拟研究(英文)[J].应用地球物理,2009,6(4):311-318,393. |
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| 作者姓名： | 王若 王妙月 底青云 王光杰 |
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| 作者单位： | 中科院地质与地球物理研究所,中国北京100029 |
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| 基金项目： | supported by the Project kzcx2-yw-113,kzcx2-yw-121 and kzcx1-yw-15-4,CAS |
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| 摘 要： | 在CSEM野外工作中，通常把接收机置于离源3~5倍趋肤深度以外的远区。本文从正演和反演两个角度研究了当源和接收机之间存在导电体时，该导电体对远区中目标体响应的影响。2D有限元正演结果表明导电体主要影响中低频的观测结果，导电体的电导率越低，尺寸越大，影响也越大，并且影响程度随着观测频率的降低而逐渐加大。反演结果表明若不考虑源和勘探区间导电体的存在，反演得到的目标体横向位置会向源的方向移动，带来解释上的误差。在CSEM实际工作中，应该是采用多方位的场源作三维采集和三维反演，以减少源和勘探区间低阻体的影响。
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| 关 键 词： | 二维有限元 电磁勘探 发射器 可控源 指挥 数值研究 三维反演 计算结果 |
| 收稿时间： | 24 January 2009 |
2D numerical study on the effect of conductor between the transmitter and survey area in CSEM exploration |
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| Ruo Wang,Miaoyue Wang,Qing-yun Di,Guang jie Wang.2D numerical study on the effect of conductor between the transmitter and survey area in CSEM exploration[J].Applied Geophysics,2009,6(4):311-318,393. |
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| Authors: | Ruo Wang Miaoyue Wang Qing-yun Di Guang jie Wang |
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| Institution: | Wang Ruo1,Wang Miaoyue,Di Qing-yun,, Wang Guang jie1. Institute of Geology , Geophysics,Chinese Academy of Sciences,Beijing 100029,China |
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| Abstract: | In CSEM exploration, the receivers are generally located about three to five times the skin depth from the transmitter. In this paper, we study the effect of a conductor between the transmitter and the survey area on the target conductor response using forward modeling and inversion. The 2D forward finite element calculations show that the conductor mainly affects the response at middle and low frequencies. The lower the resistivity and the larger the conductor, the larger the effect and the effect increase... |
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| Keywords: | CSEM exploration 2D line source low resistivity body forward modeling inversion |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
