| 井地电法的准解析近似三维反演研究 |
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| 引用本文： | 王志刚,何展翔,刘海樱.井地电法的准解析近似三维反演研究[J].应用地球物理,2006,3(3):141-147. |
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| 作者姓名： | 王志刚 何展翔 刘海樱 |
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| 作者单位： | 东方地球物理公司，中国地质大学 北京100083，东方地球物理公司，东方地球物理公司，河北涿州，072751，河北涿州，072751，河北涿州，072751 |
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| 摘 要： | 研究复杂地电模型上的井地电法三维反演一直是一个具有挑战性的课题。本文在准解析近似和重加权正则化的共轭梯度法的基础上,用visualFortran6.5开发了井地电法三维准解析近似反演程序。反演过程中的正演和Frechet导数矩阵计算都应用准解析近似大大提高了计算的速度。通过理论模型的合成数据反演试算,说明基于准解析近似法和加权正则化的共轭梯度法的井地电法三维反演程序有着计算速度快,反演精度高等特点。
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| 关 键 词： | 井地电法 准解析近似 积分方程法 重加权正则化的共轭梯度法 |
| 收稿时间： | 9 July 2006 |
Three-dimensional inversion of borehole-surface electrical data based on quasi-analytical approximation |
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| Wang Zhigang,He Zhanxiang,Liu Haiying.Three-dimensional inversion of borehole-surface electrical data based on quasi-analytical approximation[J].Applied Geophysics,2006,3(3):141-147. |
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| Authors: | Wang Zhigang He Zhanxiang Liu Haiying |
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| Institution: | (1) East Geophysical Company, Zhuozhou, 072751 Heibei Province, China;(2) China University of Geosciences, Beijing, 100083, China |
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| Abstract: | 3D inversion of borehole-surface electrical data for complex geo-electrical models is still a challenging problem in geophysical exploration. We have developed a program for 3D inversion to borehole-surface electrical data based on the quasi-analytical approximation (QA) and re-weighted regularized conjugate gradient method (RRCG) algorithms using Visual Fortran 6.5. Application of the QA approximation to forward modeling and Frechet derivative computations speeds up the calculation dramatically. The trial calculation for synthetic data of theoretical model showed that the program is fast and highly precise. |
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| Keywords: | Borehole-surface electrical method quasi-analytical approximation integral equation method re-weighted regularized conjugate gradient method |
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