Multi-frequency AVA simultaneous inversion for prestack seismic gathers

被引：0

作者：

Zhang, Fanchang ^{[1
]}

Dai, Ronghuo ^{[1
]}

Liu, Hanqing ^{[1
]}

Cao, Danping ^{[1
]}

机构：

[1] School of Geoscience and Technology, China University of Petroleum, Qingdao

来源：

Zhang, Fanchang | 1600年 / Science Press卷 / 53期

关键词：

High resolution; Multi-frequency information; Prestack seismic inversion; Simultaneous inversion; Spectral decomposition;

D O I：

10.3969/j.issn.1000-1441.2014.04.011

中图分类号：

学科分类号：

摘要：

Prestack seismic inversion plays an important role in reservoir prediction and fluid identification. Because of resolution limitation, conventional three-parameter AVA inversion can not satisfy the requirements for the high-precision seismic exploration of subtle reservoirs. We propose a simultaneous inversion method, which utilizes jointly amplitude variation with angle(AVA) and amplitude variation with frequency(AVF) information. Firstly, by getting the AVF information for a certain incident angle gather with spectral decomposition, the prestack gather is expanded into a 3D AVAF(amplitude variation with angle and frequency) data cube. Then, by multi-frequency AVA simultaneous inversion on this data cube, high-resolution lithological parameters can be obtained. Model and real data application results indicate that the multi-frequency AVA simultaneous inversion has higher resolution than conventional prestack inversion. More small-scale reservoirs such as thin-beds can be delineated by this method.

引用

页码：453 / 460

页数：7

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