S变换精确分频技术在河流相储层及流体识别中的应用

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英文篇名：The application of exact S transform frequency-division in identification of the fluvial facies reservoir and fluid 中文刊名：油气地球物理 英文刊名：Petroleum Geophysics 作者：卜鸿飞 ; 邢成奎 ; 张云涛 英文作者：BU Hong-fei (Geophysical Research Institute of Shengli Oilfield Branch Co. ; Dongying 257022 ; China) 中文关键词：油气检测 ; 流体识别 ; S变换 ; 分频处理 ; 河流相储层 英文关键词：hydrocarbon detection ; fluid identification ; S transform ; frequency-division processing and fluvial facies reservoir 出版日期：2012-04-26 机构：胜利油田分公司物探研究院; 年：2012 期：02 出版单位：油气地球物理

摘要

S变换是近几年发展起来的一种较新的时频转换算法,在信号的保真度、可信度及时频分辨率上较傅里叶变换、小波变换更加精细。S变换精确分频数据具有更好的时频分辨率,能够精确反映现有叠后地震资料更多的细节信息。本文应用分频数据中的低频阴影及调谐能量识别河道砂体分布,并通过调谐频率估算砂体厚度,提高了河流相储层描述的精度,应用高频能量衰减属性对砂体含油性进行判识,与已钻井结果吻合较好。
The S transform is a new time-frequency transform developed in the recent years, which is more precise on the signal fidelity, reliability, and time-frequency resolution compared with Fourier transform and Wavelet transform. The data from the exact S transform frequency-division has better time-frequency resolution, which can reflect exactly more information of the poststack seismic data. The distribution of the channel sand body is identified by the low frequency shadow and tuning energy, the accuracy of the fluvial facies reservoir description are improved by the thickness of the sand body calculated with tuning frequency, the oiliness of the sand body is evaluated by the high frequency energy decay, the final results have good match with the drilling data.

引文

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    [3]牛聪,刘志斌.基于谱分析的低频阴影检测技术[J].海洋石油,2008,6