| 非线性AVO反演方法研究 |
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| 引用本文： | 魏超,郑晓东,李劲松.非线性AVO反演方法研究[J].地球物理学报,2011,54(8):2110-2116. |
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| 作者姓名： | 魏超 郑晓东 李劲松 |
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| 作者单位： | 中国石油勘探开发研究院,北京 100083 |
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| 基金项目： | 国家重大专项项目(2008ZX05004-006,2011ZX05004-003)、中石油集团公司"十二五"科技项目(2011A-3603)、中国石油勘探开发研究院中青年创新基金项目(2009-B-10-05)资助. |
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| 摘 要： | 与叠后地震数据相比,叠前地震数据包含有更多的反映地下地层特征的信息,利用AVO( Amplitude Versus Offset,振幅随偏移距的变化)信息通过求解Zoeppritz方程的近似公式,叠前反演可直接得到反映地下岩石特征的弹性参数——密度、纵波速度和横波速度.从本质上讲,叠前地震反演是非线性的,但目前多采用线...
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| 关 键 词： | 反向加权 AVO反演 非线性 量子蒙特卡罗 |
| 收稿时间： | 2010-10-23 |
A study on nonlinear AVO inverse method |
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| WEI Chao,ZHENG Xiao-Dong,LI Jin-Song.A study on nonlinear AVO inverse method[J].Chinese Journal of Geophysics,2011,54(8):2110-2116. |
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| Authors: | WEI Chao ZHENG Xiao-Dong LI Jin-Song |
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| Institution: | Research Institute of Petroleum Exploration and Development, Beijing 100083, China |
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| Abstract: | Comparing with post-stack data, the pre-stack seismic data contains more information of the underground stratigraphic characteristics. By using AVO information and solving the approximate formula of Zoeppritz equation, pre-stack inversion can get elastic parameters directly, including density, vp and vs. That can improve our understanding of the underground geology greatly. Pre-stack seismic inversion, being essentially a nonlinear problem, was mostly solved approximatively by linear methods at present, which reduces the precision of seismic inversion. Based on Aki-Richards approximate formula, the paper proposed a reverse weighted method to balance the response difference caused by each parameter coefficient, and introduced quantum Monte Carlo method, with strong nonlinear search ability to seek the global optimal solution, into the pre-stack inversion for solving nonlinear equations directly, which could improve the precision of pre-stack inversion and the ability of quantitative reservoir characterization. The numerical simulation and examples both denote that this method has high calculation accuracy and good stability. |
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| Keywords: | Reverse weighted AVO inversion Nonlinear Quantum Monte Carlo |
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