| 三维电阻率成像新方法及应用 |
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| 引用本文： | 郭秀娟,张志毅,梁伟杰.三维电阻率成像新方法及应用[J].吉林大学学报(地球科学版),2005,35(1):118-122. |
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| 作者姓名： | 郭秀娟 张志毅 梁伟杰 |
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| 作者单位： | 吉林建筑工程学院,计算机系,吉林,长春,130021;Shell International Exploration and Production, Houston, USA;吉林省地质调查院,吉林,长春,130061 |
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| 摘 要： | 三维电阻率成像法包括近似三维反演因子和综合子空间解释器,三维反演因子用于正向线性电阻率近似解译,综合子空间法是共轭梯度法的变换,是求解大型最优化问题的有效方法.三维成像是线性反演问题,不需正演模拟或敏感度修改.在非线性三维反演中,三维电阻率成像技术可直接获取三维电阻率的分布信息,或提供中间过程的模式修改.野外资料验证表明,三维成像技术可提供电阻率空间的分布信息.
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| 关 键 词： | 三维电阻率 共轭梯度法 反演算法 |
| 文章编号： | 1671-5888(2005)01-0118-05 |
| 修稿时间： | 2004年3月29日 |
The Application of Three-dimensional Resistivity Mapping in Airborne EM Surveys |
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| GUO Xiu-juan,ZHANG Zhi-yi,LIANG Wei-jie.The Application of Three-dimensional Resistivity Mapping in Airborne EM Surveys[J].Journal of Jilin Unviersity:Earth Science Edition,2005,35(1):118-122. |
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| Authors: | GUO Xiu-juan ZHANG Zhi-yi LIANG Wei-jie |
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| Abstract: | A 3D resistivity mapping technique has been developed to provide fast estimates of resistivity distributions in airborne EM surveys. The method consists of an approximate 3D linear inverse operator and a generalized subspace interpreter. The 3D inverse operator can be generated using any linear forward approximation of resistivity. The generalized subspace method is an alternative to the conjugate gradient algorithm. Since the 3D mapping is a linear inverse problem, thus neither forward modeling nor sensitivity updating is needed. The 3D resistivity mapping technique can be used directly to estimate 3D resistivity distribution or to provide a model update during an intermediate iteration in a nonlinear 3D inversion. Field data examples indicate that the 3D mapping can provide quantitative information about the resistivity and spatial distributions of the 3D targets. |
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| Keywords: | three-dimensional resistivity mapping conjugate gradient method inversion algorithms |
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