| TI介质多波叠前AVA岩性参数反演 |
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| 引用本文： | 钟峙,李录明,史运华,罗奕.TI介质多波叠前AVA岩性参数反演[J].煤田地质与勘探,2010,38(2). |
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| 作者姓名： | 钟峙 李录明 史运华 罗奕 |
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| 作者单位： | 1. 成都理工大学地球探测与信息技术教育部重点实验室,四川,成都,610059
2. 煤炭科学研究总院西安研究院,陕西,西安,710054 |
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| 摘 要： | 介质各向异性对多波振幅随入射角变化而变化(AVA)的特征有着重要影响。根据横向各向同性(TI)介质Zoeppritz方程,探讨TI介质中AVA曲线的特征,并以此为基础,分别利用解析广义线性反演法和扰动广义线性反演法对理论模型进行反演,完成了对地层P波速度、S波速度、密度及各向异性系数的反演。理论模型的计算验证了该方法的正确性后,将此TI介质多波叠前AVA参数反演方法用于实际多波资料反演处理,取得较好效果,说明多波AVA参数反演方法是可行的,对岩性预测有着重要的意义。
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| 关 键 词： | 多波AVA叠前反演 扰动法 解析法 角道集 |
Multiwave pre-stack AVA parameter inversion in TI media |
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| Abstract: | AVA(Amplitude Versus Angle) plays an important part in the seismic data processing of the multi-wave.Based on the Zoeppritz's equation of the transversely isotropic media, seismic multi-wave AVA inversion of the transversely isotropic media parameter has been discussed in this paper. In the study of the AVA, inversion is the method that by use of the AVA curves measured and multi-wave AVA parameter inversion equation obtained the speed and density value of the underground P and S waves. Based on the establishment of the forward models,generalized linear inversion method is adopted to respectively analyze the two-tier and multi-level theoretical models using the analytical method and perturbation method to get the P-P wave velocity, P-SV wave velocity,stratum density and anisotropy coefficient. Model calculations show that the method is correct. Finally, we combined the actual multi-wave data to implement AVA parameters inversion. Therefore, all of the above results have proved the multi-wave AVA stratum parameter inversion discussed in this paper is feasible. It plays an important part in prediction of lithology. |
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| Keywords: | pre-stack AVA inversion perturbation Method analytical method AVA angle-gather |
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