基于广义S 变换频散AVO 属性提取方法研究

doi:10.3969/j.issn.1673-8926.2015.04.012

LITHOLOGIC RESERVOIRS ›› 2015, Vol. 27 ›› Issue (4): 84-88.doi: 10.3969/j.issn.1673-8926.2015.04.012

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Abstraction of frequency-dependent AVO attributes based on generalized S transform

Gao Gang¹， Li Yuhai²， Gui Zhixian¹， Wang Wentao²

1. Key Laboratory of Exploration Technologies for Oil and Gas Resources ， Ministry of Education ， Yangtze University ，Wuhan 430100 ， China ； 2. Dagang Sub-division of Research Institute ， Bureau of Geophysical Prospecting INC ， CNPC ， Tianjin 300280, China

Online:2015-07-20 Published:2015-07-20

Abstract

Abstract:

In recent years, laboratory and theoretical studies showed that fluid-media often leads to varying degrees of dispersion and attenuation of seismic waves, which provides a basis for identifying the reservoir fluid. In order to identify reservoir fluid more effectively, it is necessary to study to improve the accuracy and reliability of the seismic wave dispersion attributes. Firstly, the theory of the seismic wave dispersion attributes was summarized, the advantages and disadvantages of a variety of time-frequency analysis method were analyzed and compared, generalized S transform was optimized to process and analyze seismic data because it’s time window is flexibly adjusted according to the frequency distribution characteristics of seismic signals. Secondly, the corresponding calculation process was conducted. Finally, this method was applied in actual data calculation of K71 fault block, and the result is in good correspondence with actual drilling results.

Key words: velocity sensitivity, clay minerals, particle migration, Triassic, Tabei uplift

Gao Gang， Li Yuhai， Gui Zhixian， Wang Wentao. Abstraction of frequency-dependent AVO attributes based on generalized S transform[J].LITHOLOGIC RESERVOIRS, 2015, 27(4): 84-88.

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