Extraction Method of Absorption Coefficient Based on Wavelet Transform and Its Application
详细信息
- 责任者：Zhou Zhe (College of Geosciences ; Yangtze University ; Jingzhou 434023 ; China) ; Gui Zhixian
- 刊名：Fault-Block Oil and Gas Fields
- 出版年：2013
- 卷期：20(3)
- 关键词：小波变换 ; wavelet transform ; 地震勘探 ; seismic exploration
- 页码：p.289-292
- 图表：illus., 19 refs.
- 分类号：1600
- issnNo：ISSN1005-8907
- isbnNo：CN41-1219/TE
摘要
Attenuation and absorption of seismic data are closely related to rock lithology and hydrocarbon situation in reservoir.The frequency information of seismic signal can reflect the effect of stratigraphic absorption coefficient sensitively.The seismic signals belong to typical non-stationary random signals which are usually shorter in duration and faster in acquiring mutation.Wavelet transform can make a precise time-frequency analysis for the signals,and at the same time,the diversity of wavelet function make the wavelet transform show the great flexibility and compatibility.Through the time-frequency analysis with wavelet transform and through the extraction of absorption coefficient of wavelet transform amplitude spectrum with spectral ratio,actual application results show that the method presents a good effect in identifying gas-bearing reservoir and has a reference for late exploitation.