| 海底多波多分量AVO反演岩性参数的敏感性分析 |
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| 引用本文： | 顾汉明,江涛,朱培民,王家映,詹正彬,朱光明.海底多波多分量AVO反演岩性参数的敏感性分析[J].石油物探,1999,38(4):36-43,24. |
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| 作者姓名： | 顾汉明 江涛 朱培民 王家映 詹正彬 朱光明 |
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| 作者单位： | [1]中国地质大学应用地球物理系 [2]西安工程学院应用地球物理研究所 |
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| 基金项目： | 国家863计划“海上多波地震勘探技术”项目!820-05-02-03 |
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| 摘 要： | 海底多波多分量地震资料能够提供含气高压地 地质信息，这些分量对利用振幅随偏移变化（ＡＶＯ）进行岩性参数反演的敏感性是不同的。利用正演技术分析研究氏多波地震资料中岩性参数反的敏感性，有助于充分利用海底多波地震资料提高ＡＶＯ反演性参数的可靠性。本文应用计算反射系数的Ｚｅｐｐｒｉｔｚ方程，实施海底多波多分量合成数据的岩性参数ＡＶＯ反的敏感性分析，确定哪些岩性参数或它们的组合关系能最佳地从ＡＶＯ资料中反演
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| 关 键 词： | 多波多分量 AVO 岩性反演 敏感性 海底 地震勘探 |
| 收稿时间： | 1999-2-25 |
| 修稿时间： | 1999-5-24 |
Sensitivity analysis of petrophysical parameter inversion using seabottom multiwave, multicomponent AVO data |
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| Gu Hanming,Jiang Tao,Zhu Peimin,Wang Jiaying,Zhan Zhengbin,Zhu Guangming.Sensitivity analysis of petrophysical parameter inversion using seabottom multiwave, multicomponent AVO data[J].Geophysical Prospecting For Petroleum,1999,38(4):36-43,24. |
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| Authors: | Gu Hanming Jiang Tao Zhu Peimin Wang Jiaying Zhan Zhengbin Zhu Guangming |
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| Affiliation: | Department of Applied Geophysics. China University of Geosciences, Wuhan 430074 |
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| Abstract: | Ocean bottom multiwave, multicomponent seismic data can provide geologic informationon gas-bearing high-pressure strata. These components have a different sensltivity to petrophysidri pa-rameter inversion using AVO data. Analysis and study of the sensitivity by forward modelling techniqueare helpful to improving the reliability of petrophysical parameter inversion with AVO data. In this pa-per, the Zoeppritz equation is used for sensitivlty analysis of the inversion and for determining whichpetrophysical parameters or their combination can be obtained from the AVO data inversion. The param-eters considered are velocity ratio and density ratio between two sides of media. First, we linearize theforward formula of computing reflectivity in time domain to obtain the sensitivity matrix of inversion,then compute the eigenvalue and eigenvoctor of the matrix, and finally analyze the sensit1vity of petro-physical parameter inversion. The analysis results say that the ocean bettom multiwave , multicomponentdata can increase the reliability of AVO data inversion.Not only the wave impedance, but also the veloc-ity ratio and density ratio between two sides of media can be well derived from the inversion. |
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| Keywords: | multiwave and multicomponent AVO inversion eigenvalue eigenvector sensitivity |
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