转换波处理一些问题及对策  

SOME PROBLEMS AND STRATEGIES IN CONVERTED-WAVE PROCESSING

作　　者：肖思和 马昭军 

机构地区：[1]成都理工大学材料与化学化工学院,成都610059 [2]中石化西南分公司研究院德阳分院,四川德阳618000

出　　处：《物探化探计算技术》2009年第6期535-540,1,共6页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家科技攻关项目(2008zx05000-002)

摘　　要：由于转换波本身的特殊性,在处理过程中需要采用不同于纵波的处理方法。分析了转换波处理过程中的一些问题,即面波衰减、静校正、各向异性动校正,以及方位各向异性校正,提出相应的解决方法。采用极化滤波方法,实现了转换波上的面波衰减。采用综合静校正技术,切实解决转换波静校正问题。各向异性速度分析及动校正方法,用于拉平转换波资料的近、中和远偏移距同相轴。通过横波分裂分析及分量校正补偿,提高了转换波径向剖面质量。根据实际资料处理效果,说明了这些方法的有效性。Because of converted-wave itself particularity,it is required that the processing methods is different from P-wave.In this paper,some problems are analyzed in processing converted-wave data,such as surface wave attenuation,static correction,anisotropic NMO,azimuth anisotropic correction,etc.Some methods are applied to resolve these problems.Polarization filter method is used to attenuate surface wave in converted-wave shots.Integrated static correction techniques are applied to resolve converted-wave static correction problem.The method of anisotropic velocity analysis and NMO are used to flatten the far,medium and small offset events.The radial section quality is greatly improved by S wave splitting analysis and compensation.Actual processing results show the effectiveness of these methods.

关 键 词：转换波 极化滤波 静校正 各向异性 横波分裂 

分 类 号：P631.4[天文地球—地质矿产勘探]