Fluid property discrimination by AVO inversion
Fluid property discrimination by AVO inversion
复制标题
通过 AVO 反演进行流体性质判别
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
De‐hua Han
中科院分区：
文献类型：
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作者：
Xingang Chi;De‐hua Han
贝叶斯AVO反演方法是近年来发展起来的一种反演地震弹性参数（纵波速度、横波速度和密度）的叠前反演技术。该方法包括AVO处理与分析、测井编辑与标定、叠前地震反演等。本文从岩石物理学和贝叶斯AVO反演两个方面探讨了基于贝叶斯反演方案的流体反演问题。用Gassmann方程计算了流体粘度。分析了弹性参数和弹性模量反演过程中的不确定性。利用岩石物理关系式和增益函数计算流体模量。这种方法适用于墨西哥湾的地震数据。结果在两口威尔斯周围的小3D立方体的目标层位处被反演。叠前地震资料反演的流体密度对孔隙流体含量敏感。
Bayesian AVO inversion method is the developed prestack inversion technique for inverting seismic elastic parameters (p-wave velocity, s-wave velocity and density). The method is included AVO processing and analysis, well-log editing and calibration, and prestack seismic inversion. This analysis draws rock physics and Bayesian AVO inversion to discuss the fluid discriminator based on Bayesian inversion scheme. The fluid discriminator is calculated by Gassmann’s equation. The uncertainty is analyzed in the inversion procedure for elastic parameters and modulus. The rock physics relationship and gain function are also used to calculate the fluid modulus. This method is applied to seismic data from the Gulf of Mexico. The result is inverted at the target horizons for the small 3D cubes around two wells. The fluid discriminator inverted from prestack seismic data is sensitive to the pore fluid content.