一种变时窗地震波形分类技术及其应用

A technique of seismic waveform classification within a variable time window and its application

传统的地震波形分类方法大都是以等时窗内地震道波形相似性来划分地震相,不能准确反映储层与地震波形的对应关系。提出了一种变时窗地震波形分类技术,将时间域不等长地震信号变换到频率域,并在频率域插值成等长地震信号,运用频率域波形聚类算法进行地震相划分,从而实现了变时窗地震波形分类。将该技术应用到渤海JZ油田的地震相划分,验证了变时窗地震波形分类技术的正确性和可行性,为应用三维地震资料研究沉积相提供了一种有效手段。

Most methods of traditional seismic waveform classification divide seismic facies by seismic waveform similarity within an equal time window,and can not accurately reflect the relationship between reservoir and seismic waveform.Therefore,a technique of seismic waveform classification within a variable time window has been developed,in which the seismic signals with different lengths in time domain are transformed into frequency domain,and become the seismic signals with equal length in frequency domain by signal interpolation,and the seismic facies can be divided by using a waveform clustering algorithm in frequency domain,resulting in the seismic waveform classification within a variable time window.The technique＇s accuracy and feasibility have been verified by its successful application to JZ oilfield in Bohai Sea,and it can be an effective tool to research sedimentary facies by using 3D seismic data.