莺歌海盆地OBC多分量地震虚反射和鸣震压制及其效果分析  

A method to suppress ghost reflection and reverberation in OBC multicomponent seismic data and its effect analysis in Yinggehai basin

作　　者：郑红波[1] 阎贫[1] 金丹[1] 

机构地区：[1]中国科学院边缘海地质重点实验室与南海海洋研究所

出　　处：《中国海上油气》2013年第3期23-27,共5页China Offshore Oil and Gas

基　　金：国家自然科学青年科学基金项目"南海南部礼乐海区深水底流特征(编号:41106056)";国家重点基础研究发展计划(973计划)项目"南海中生代主动边缘的构造系统;盆地改造及油气资源潜力(编号:2007CB411706)"部分研究成果

摘　　要：利用中国海洋石油总公司在莺歌海盆地采集的海底电缆(OBC)多分量地震数据,分析了虚反射及鸣震产生的物理过程和压制方法的原理,分别利用平均能量法及自相关求取海底反射系数的方法求取合适的叠加系数,将OBC资料中的压力分量和垂直位移分量进行叠加以消除虚反射和鸣震,取得了较好的压制效果,为该地区后续的高精度偏移成像和解释工作奠定了基础。By using the multicomponent seismic data acquired with ocean bottom cable （OBC） systems by China National Offshore Oil Corporation （CNOOC） in Yinggehai basin, the physical processes to produce ghost reflection and reverberation and the principles to suppress them were analyzed, and the appropriate stacking coefficients were calculated by the average en- ergy algorithm and by the tool to obtain ocean bottom reflectivity through autocorrelation respectively. Then the pressure component in the OBC data was stacked with the vertical displacement component in order to e liminate the ghost and reverberation, resulting in quite good suppression effects. This suppression method may lay a foundation for the subsequent high-precision migration imaging and geological interpretation.

关 键 词：莺歌海盆地 OBC 多分量地震数据 虚反射 鸣震 压制方法 压制效果 

分 类 号：TE15[石油与天然气工程—油气勘探]