深浅水变换带地震资料子波处理技术应用研究  

Application of Seismic Wavelet Processing Technology to Deep and Shallow Water Zones

作　　者：陈礼[1] 李列 张治忠[3] 李添才[4,5] 王用军 

机构地区：[1]中海油田服务股份有限公司物探研究院,天津300451 [2]中海石油中国有限公司湛江分公司,广东湛江524057 [3]中国海洋大学海洋地球科学学院,山东青岛266100 [4]中海油能源发展钻采工程研究院地球物理研究所,广东湛江524057 [5]吉林大学地球探测科学与技术学院,吉林长春130012

出　　处：《工程地球物理学报》2013年第4期442-448,共7页Chinese Journal of Engineering Geophysics

基　　金：国家重大科技专项子专题项目(编号:2011ZX05000023004001)资助

摘　　要：在海上地震勘探中,气枪激发时所产生的气泡震荡影响了地震资料的信噪比和分辨率。目前使用较为广泛的方法是应用远场子波预测反褶积来压制震源气泡的影响。在浅水中压制由于空气枪产生的气泡振荡的低频起到了一定作用,可也压制了小部分的有效频率,这对精细勘探来讲是不足的。为满足精细勘探需要,本文通过深水可完整记录直达波的特点,在测线的近道上应用直达波和海底反射波的组合得到统计子波的方法来压制气泡。结果表明气泡得到了很好的压制,并且较好地保护了有效频率。In offshore earthquake exploration,the bubble oscillation caused by air gun firing affected the seismic S/N and resolution.At present,far field wavelet predicting deconvolution is widely spread and used to eliminate the bubble.This method which is used to eliminate the low frequency of bubble caused by air gun firing in shallow water is effective,but a small part of effective frequency was also eliminated.This is inadequate to accurate seismic exploration.To meet the accurate seismic exploration need,this paper described a method of statistical wavelet derived from direct wave and sub-bottom reflection combination in the line of near-trace to eliminate bubble effects based on the characteristics that deep water received the full direct wave.The result shows that the method is good in both bubble eliminating and effective frequency protecting.

关 键 词：远场子波 直达波 组合 统计子波 气泡 

分 类 号：P631.4[天文地球—地质矿产勘探]