新疆石油地质

新疆石油地质 ›› 2007, Vol. 28 ›› Issue (5): 569-571.

• 油气勘探 • 上一篇    下一篇

基于小波包变换与关联维的储集层检测

文晓涛, 贺振华, 黄德济   

  1. 成都理工大学 信息工程学院, 成都 610059
  • 收稿日期:2006-11-07 修回日期:2007-02-14 出版日期:2007-10-01 发布日期:2020-08-03
  • 作者简介:文晓涛(1976-), 男, 新疆伊宁人, 讲师, 博士, 石油物探,(Tel) 13982259738(E-mail) wwxxtt2004@yahoo.com.cn.

Reservoir Detection Based on Wavelet Packet Transform and Correlation Dimension

WEN Xiao-tao, HE Zhen-hua, HUANG De-ji   

  1. Institute of Information Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, China
  • Received:2006-11-07 Revised:2007-02-14 Online:2007-10-01 Published:2020-08-03

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摘要： 储集层中的油、气、水有不同的波阻抗,产生不同的反射系数,就会有不同的波形,所以通常情况下关联维会变小。但由于地震波是有一定带宽的信号,波形受这个带宽内所有频率成分的影响,因而直接进行关联维的计算往往得不到较好的效果。鉴于这种情况,提出了小波包与关联维相结合的方法,利用小波包变换适用于对信息的高低频成分做细致分解的性质,提取出反映细节的高频成分,再对分频后的结果进行关联维计算。利用该方法对塔河油区三叠系中油组进行了试算,取得了较好的效果。

关键词: 小波色变换, 关联维, 储集层, 检测, 高频

Abstract: Oil, gas and water in a reservoir have different impedances, which may cause different reflection coefficients and waveforms. As a result, the value of correlation dimension is generally low. Seismic wave is the signal with definite bandwidth and the waveform is affected by all frequency components within the bandwidth, so the result could be unsatisfied if we calculate the correlation dimension directly. This paper proposes the method integrating wavelet packet with correlation dimension. Based on the feature that wavelet packet is suitable for decomposing high-low frequency component in detail, the high frequency component which can mirror details of seismic signals is extracted, and then the calculation of correlation dimension is made for the result given from frequency component processing. This method is applied to the middle oil layer of Triassic in Tahe area, and the calculated result is more satisfied.

Key words: wavelet packet transform, correlation dimension, reservoir rock, detection, high frequency, seismic data processing

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