Seislet变换在海上拖缆多震源采集数据分离中的应用

Application of Seislet Transform on the Separation of Marine Multi-Source Blended Wavefields

多震源混合采集技术具有减小勘探周期、降低勘探成本、提高数据质量等方面的优势,近年来,海上拖缆多震源混合采集技术得到了发展和应用,由于海上拖缆采集每炮对应的排列位置随着炮点同步移动,导致多震源混合数据的分离往往是一个欠定的反演问题,Seislet变换对地震数据具有更好的压缩特性,并且能够压制随机噪声,为此,分析了不同数据域海上拖缆多震源采集数据特征,将Seislet变换应用于海上拖缆多震源混合数据的分离,海上拖缆多震源合成和实际采集的混合波场分离结果表明,该方法能够取得更好的分离效果。

Simultaneous source acquisition technology has the advantages of reducing the exploration period and low exploration cost and can improve the data quality.The simultaneous marine source acquisition technology has developed and been applied recently.Since the corresponding arrangement position of each streamer of the marine streamer is simultaneously removed with shot position,the separation of multisource blended data is often an underdetermined inversion problem.The Seislet transform has better compression characteristics for seismic data and can suppress a certain amount of random noise.This paper analyzes the characteristics of marine multi-source blended wavefields in different domains and uses the Seislet transform to separate the multi-seismic blended data for towed streamers.The separation of blended wavefields for the synthetic marine simultaneous acquisition and actual acquisition indicates that the method can achieve better separation results.