| 小生境遗传算法AVOA反演 |
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| 引用本文： | 卢明辉,彭立才,杨慧珠,张海云. 小生境遗传算法AVOA反演[J]. 石油地球物理勘探, 2006, 41(4): 447-450 |
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| 作者姓名： | 卢明辉 彭立才 杨慧珠 张海云 |
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| 作者单位： | 北京市海淀区清华大学工程力学系，清华大学工程力学系，清华大学工程力学系，清华大学宇航中心 100084 |
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| 基金项目： | 本项目研究由国家自然科学基金（10272064）和CNPC科技开发项目（0481030100）资助;本文作者非常感谢四川石油管理局成都物探研究中心高级工程师李邗提供G16井全方位角道集及裂缝发育预测图等资料. |
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| 摘 要： | 采用具有水平对称轴的横向各向同性(HTI)模型研究裂缝性油气藏,P波振幅随炮检距和方位角变化(AVOA),表现出较强的方位各向异性特征。本文基于Ruger提出的HTI介质模型的P波反射系数公式,利用由基准测线和另外两条与之呈45°、90°测线的P波反射系数的相对差异估算裂缝方位;同时引入小生境遗传算法,对基准测线和与之呈90°测线的P波反射系数差进行反演,得到了较高精度的纵、横波波速比和Thomsen各向异性参数。
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| 关 键 词： | AVOA 反演 裂缝检测 小生境遗传算法 HTI |
| 收稿时间： | 2005-12-18 |
| 修稿时间： | 2005-12-18 |
Application of Niche Genetic Algorithm (NGA) on AVOA inversion |
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| Lu Ming-hui,Peng Li-cai,Yang Hui-zhu and Zhang Hai-yun. Lu Ming-hui. Application of Niche Genetic Algorithm (NGA) on AVOA inversion[J]. Oil Geophysical Prospecting, 2006, 41(4): 447-450 |
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| Authors: | Lu Ming-hui Peng Li-cai Yang Hui-zhu Zhang Hai-yun. Lu Ming-hui |
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| Affiliation: | Lu Ming-hui,Peng Li-cai,Yang Hui-zhu and Zhang Hai-yun. Lu Ming-hui,Department of Engineering Mechanics,Tsinghua University,Haidian District,Beijing City,100084,China |
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| Abstract: | Using transversely isotropic model with horizontal axis of symmetry (HTI) to study the fractured oil/gas reservoir, P-wave amplitude variation with offset and azimuth (AVOA) appears strong azimuth anisotropic feature. Based on the P-wave reflection coefficients formula in HTI media model presented by Mr. Ruger, the paper uses the relative differences between the P-wave coefficients of datum line and other two lines crossing over the datum line with 45 and 90 respectively to evaluate the fractured azimuths; meanwhile, introducing niche genetic algorithm to perform inversion of differences of the coefficients between datum line and the line crossing over the datum line with 90, which obtains higher-precision P-wave velocity-to-S-wave velocity ratio and Thomsen anysotopic parameters. |
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| Keywords: | AVOA inversion fracture detection niche genetic algorithm HTI |
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