波场分离对ISS采集资料处理结果的影响

Influence of simultaneous source separation on ISS data processing results

ISS(独立同步扫描)是一种高效地震采集技术,其资料处理大都采用对未分离的资料直接进行处理.为了研究这种处理方式的适用性,采用可控震源同步扫描连续记录正演模拟技术模拟一条5个同步震源的ISS密点采集剖面,与扫描信号互相关后形成相关后的炮道集,并对其进行高精度波场分离,将未进行波场分离的数据体与波场分离后的数据体分别抽成多条不同叠加次数的叠前数据体,再分别进行常规处理,从而得到不同叠加次数波场分离前后的处理剖面,通过对比分析这些剖面的差异,以确定波场分离对不同叠加次数ISS采集资料成像效果的影响,结合对野外采集资料的处理分析,说明了波场不分离的常规处理方式适用于较高叠加次数的ISS资料的处理,而ISS采集大都是密点采集,叠加次数很高,因此这种处理方式是有效的.

ISS（ Independent Simultaneous Sweeping） is a kind of highefficiency seismic acquisition technology, and its data processing mostly uses the unseparated data directly. To study the applicability of this approach,vibroseis simultaneous sweeping and continuous recording forward modeling technique is adopted to simulate an ISS densepoint profile with five simultaneous sources,and after crosscorrelation with the scanning signal shot gathers are formed. Seprating the shot gathers to form the seprated shot gathers.Several prestack data volumes with different stacking folds and with or without simultaneous source separation are formed by extacted from shotgathers with or without simultaneous source separation.The prestack data volumes then are dealt with by conventional processing procedures. Through comparative analysis of the conventional processing results of different stacking folds data with simultaneous source separation or not to determine the influence of Simultaneous source separation on ISS data processing results.Combining the processing results of real ISS data it shows that conventional data processing without simultaneous source separation is suitable for the highfold ISS data processing.