【摘要】 琼东南盆地坡折带紧邻富烃凹陷,具有良好的油气勘探前景,陆架到陆坡之间水深从200m迅速加深至2000m.坡折带这种特殊海底地貌形成了复杂的地震波场,资料多次波发育且信噪比低.本文从正演模拟和原始野外记录资料分析了坡折带地震资料特征及处理的难点,提出了多次波衰减及深度域速度建模技术对策,实现了良好偏移成像.更多还原

【Abstract】 Shelfbreak in Qiongdongnan Basin is near by hydrocarbon-rich sag,has the good oil and gas exploration prospect.The water depth changed rapidly from 200 m to about 2000 m,the seismic waves is very complex because of this special submarine geomorphology,such as complex multiples and low S/N.This paper analyzes the difficulties of shelfbreak zone seismic data processing from the forward model and the original field recording,and propose technical countermeasures on multiple attenuation and velocity modeling in depth domain,get a preferable migration imaging.更多还原