复杂断块叠前时间偏移技术应用实例研究  

CASE STUDY ON APPLICATION OF PSTM TO COMPLEX FAULTS AREA

作　　者：高银波[1,2] 徐右平[3] 梁宏[2] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]中国石油勘探开发研究院物探技术研究所,北京100083 [3]中国地质大学能源系,北京100083

出　　处：《物探化探计算技术》2010年第4期365-370,共6页Computing Techniques For Geophysical and Geochemical Exploration

摘　　要：叠前时间偏移技术在复杂构造成像方面具有较好的适用性,在生产应用中取得了良好的效果。针对复杂断块叠前成像处理,开展各向异性叠前时间偏移方法研究,以落实地下构造特征,精细刻画地下构造预断裂系统特征。结合水陆过渡带的地震资料,针对复杂断块成像展开了研究,以叠前保幅去噪,子波一致性处理和各向异性速度分析为基础,开展各向异性叠前时间偏移技术研究,取得了良好的应用效果。地下构造成像清晰,断裂特征刻画也更为清晰,同时还提供了高质量的叠前时间偏移道集,为后续的叠前储层研究奠定了有利的基础。Pre-stack time migration has got good applicability of seismic imaging in complex structure,and good result in the production area.Based on complex block pre-stack imaging processing,we launch anisotropic pre-stack time migration to get the clear features of underground construction and depict the characteristics of pre-fault system.Combined with seismic data in transition zone,imaging studies on complex block is carried out by using preserve-amplitude noise attenuation,seismic wavelet consistence processing and multiples attenuation.We start with anisotropic velocity analysis and PSTM with anisotropy,and got a good image of geological structure and faults in the study area.Further,high quality PSTM common reflect point gathers which was useful for the following study of pre-stack prediction of hydrocarbon.

关 键 词：叠前时间偏移 保幅去噪 子波一致性处理 各向异性 

分 类 号：P631.4[天文地球—地质矿产勘探]