天然气地球科学

• 天然气勘探 • 上一篇    

同步挤压小波变换在储层预测中的应用

李斌1,2,乐友喜3,温明明1,2   

  1. 1.中国地质调查局广州海洋地质调查局,广东 广州 510075;
    2.国土资源部海底矿产资源重点实验室,广东 广州 510075;
    3.中国石油大学(华东)地球科学与技术学院,山东 青岛 266580
  • 收稿日期:2016-10-20 修回日期:2016-12-08 出版日期:2017-02-10 发布日期:2017-02-10
  • 作者简介:李斌(1989-),男,湖北孝感人,助理工程师,硕士,主要从事海洋地质勘查技术方法研究. E-mail:binli0710@163.com.
  • 基金资助:

    国家重点研发计划重点专项项目“近海底高精度水合物探测技术”(编号:2016YFC0303900)资助.

Reservoir predication based on synchrosqueezing wavelet transform

Li Bin1,2,Yue You-xi3,Wen Ming-ming1,2   

  1. 1.Guangzhou Marine Geological Survey,China Geological Survey,Guangzhou 510075,China;
    2.Key Laboratory of Marine Mineral Resources,Ministry of Land and Resources,Guangzhou 510075,China;
    3.School of Geosciences,China University of Petroleum,Qingdao 266580,China
  • Received:2016-10-20 Revised:2016-12-08 Online:2017-02-10 Published:2017-02-10

摘要:

随着勘探难度的增加,小波变换时频分辨率的精度已经难以达到实际勘探目标的要求,这就需要探索分辨率更高的时频分析方法。同步挤压小波变换(Synchrosqueezing Wavelet Transform-SWT)通过对小波变换的复系数谱在频率方向上进行压缩重组,得到比小波变换更高的时频分辨率,同时还具有可逆性和一定的抗噪性。通过模拟信号的测试结果表明,同步挤压小波变换在刻画信号的时频特征方面精度更高、准确性更好;而在实际地震资料的分析当中,利用同步挤压小波变换对含气薄储层的地震数据进行分频处理,其低频处出现明显异常,而且频率越低异常越明显,有效地预测出储层的存在。

关键词: 同步挤压小波变换, 时频分辨率, 分频处理, 低频异常, 储层预测

Abstract:

With the increasing difficulty of exploration,the accuracy of the time-frequency resolution of wavelet transform has been difficult to meet the requirements of the actual exploration targets,which needs to explore a higher resolution time-frequency analysis method.The synchrosqueezing wavelet transform (SWT) can obtain time-frequency resolution better than the wavelet transform by squeezing and reconstructing complex coefficient spectra in frequency direction.And it also has reversibility and anti-noise property.The simulation results show that the synchrosqueezing wavelet transform has better accuracy in characterizing the time-frequency characteristics of the signal.And in the analysis of the actual seismic data,the frequency division process of the synchrosqueezing wavelet transform is applied to process the thin gas-bearing reservoir seismic data.Where the low frequency appears obvious anomalies,and the lower frequency is,the more obvious anomalies are.So the reservoir is predicted effectively.

Key words: Synchrosqueezing wavelet transform, Time-frequency resolution, Frequency division processing, Low-frequency anomaly, Reservoir prediction

中图分类号: 

  • TE132.1+4

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