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| 联合PP、PS波叠前AVA反演方法 | |
| 引用本文： | 张丰麒,陆占国,刘昱彤. 联合PP、PS波叠前AVA反演方法[J]. 物探与化探, 2012, 36(6): 985-990 |
| 作者姓名： | 张丰麒 陆占国 刘昱彤 |
| 作者单位： | 1. 中国地质大学地球探测与信息技术重点实验室,北京,100083 2. 北京桔灯导航科技发展有限公司,北京,100085 3. 河南省中原油田钻井工程技术研究院,河南濮阳,457001 |
| 摘 要： | 从单一pp波数据中提取出来的弹性参数与岩性以及孔隙内流体之间的联系是不充分的,这就造成了在油藏的解释中包含有大量的不确定性.通过加入PS波数据信息,可以有效降低反演的多解性,提高反演的稳定性.笔者所研究的反演方法是基于精确的Zoeppritz方程,利用广义线性反演方法,通过迭代的思想来反演出纵波速度、横波速度和密度.该方法相对单一pp反演可以有效提高横波速度的估计精度. |
| 关 键 词： | PP波 PS波 Zoeppritz方程 叠前AVA反演 |
A STUDY OF COMBINING AVA INVERSION WITH PP-WAVE DATA AND PS-WAVE DATA |
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| ZHANG Feng-qi,LU Zhan-guo,LIU Yu-tong. A STUDY OF COMBINING AVA INVERSION WITH PP-WAVE DATA AND PS-WAVE DATA[J]. Geophysical and Geochemical Exploration, 2012, 36(6): 985-990 | |
| Authors: | ZHANG Feng-qi LU Zhan-guo LIU Yu-tong |
| Affiliation: | 1.Key Laboratory of Earth Exploration and Information Technology,China University of Geosciences,Beijing 100083,China;2.Beijing Orangelamp Navigation Technology Development Co.,Ltd.,Beijing 100085,China;3.Zhongyuan Oil Field Drilling Engineering Technology Institute,Puyang 457001,China) |
| Abstract: | The elastic parameters inverted from PP-wave data couldnt reflect the variation of the lithology and the fluid in pore adequately, which results in large uncertainty in the interpretation of oil reservoir. If the information of PS-wave data is added as the constraint, the interpretation ambiguity could be reduced effectively and the stability of inversion could be improved considerably. The method of the joint inversion presented in this paper uses the theory of GLI（ generalized linear inversion） to invert P-wave velocity, S-wave velocity and density iteratively based on the exact Zoeppritz equation. And the precision of S-wave velocity inverted from the joint inversion is improved largely compared with that of inversion by only using PP-wave data. |
| Keywords: | PP-wave PS-wave Zoeppritz equation prestack amplitude versus angle inversion |
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