石油与天然气地质 ›› 2001, Vol. 22 ›› Issue (3): 234-237.doi: 10.11743/ogg20010309

• 油气空间 • 上一篇    下一篇

时-频分析在高分辨率层序地层学中的应用

石万忠1, 李举子2, 李梦溪3, 胡小强1, 陈新军1   

  1. 1. 中国地质大学资源学院, 湖北武汉430074;
    2. 中国地质大学汉口分校, 湖北武汉430072;
    3. 华北油田采油三厂地质大队, 河北任丘062450
  • 收稿日期:2001-02-22 出版日期:2001-09-25 发布日期:2012-01-16

APPLICATION OF TIME-FREQUENCY ANALYSIS TO HIGH RESOLUTION SEQUENCE STRATIGRAPHY

Shi Wanzhong1, Li Juzi2, Li Mengxi3, Hu Xiaoqiang1, Chen Xinjun1   

  1. 1. Faculty of Resources, China University of Geosciences, Wuhan, Hubei;
    2. Hankou Branch of China University of Geosciences, Wuhan, Hubei;
    3. Geological Brigade of 3rd Oil Production Factory, Huabei Oilfields, Renqiu, Hebei
  • Received:2001-02-22 Online:2001-09-25 Published:2012-01-16

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摘要：

时频分析方法是利用小波变换原理,从地震波的时间域和频率域同时对其作出分析.小波变换具有随信号频率升高时间分辨率也提高的特点.这一特点恰好满足对具有多刻度特征信号进行时频分析定位的要求.经实验发现,沉积旋回与主极值频率之间有较好的对应关系:正旋回沉积对应的主极值频率从下到上由高频变为低频;反旋回沉积正相反.利用这一对应关系可进行层序地层划分和生储盖组合的预测.时频分析是在层序地层格架中预测生储盖组合,可有效保证预测的准确性.而时频分析法研究的对象是对应沉积旋回的频率变化,因此,还可用来判识砂体的性质.

关键词: 小波变换, 高分辨率层序地层学, 时-频分析, 主极值频率

Abstract:

Time frequency analysis method is used to analyze the time domain and frequency domain of seismic waves at the same time according to the principle of wavelet transformation.The time frequency of wavelet transformation increases with the increasing of signal frequency.This can satisfy well time frequency analysis of multi graduation characteristic signal.It has been proved by practice that sedimentary cycle possesses good correspondence with the main extremum frequence;the corresponding main extremum frequence of normal sedimentary cycle changes from high frequency to low frequency in ascending order;the anticycle sedimentation is opposite.This correspondece could be used in sequence stratigraphic division and source reservoir cap rock assemblage prediction,and also in the recognition of sand body property.

Key words: wavelet transformation, high resolution sequence stratigraphy, time frequency analysis, main extremum frequency

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