叠后地震数据采集足迹消除技术Gabor算法的研究及应用

渤海矿区曹妃甸A构造位于渤海湾盆地、渤中凹陷与沙垒田凸起的连接处，是渤海湾盆地重要勘探区块之一。工区内三维地震资料采集时间较早，存在较强的采集足迹，尤其在目的层明化镇组下段，采集足迹与断层相互切割，严重影响断裂系统解释及构造认识，为油田下一步勘探、生产工作带来了很大困难。Gabor滤波技术选取不同方位进行特定频率滤波，有效滤除了采集足迹对地震资料的影响，解决了由于采集足迹影响导致的地震数据成像差的问题。通过该方法滤波后的地震资料断裂系统展布清晰，能够满足地质人员对油田工区构造情况进行分析，满足地质人员的要求，为后续油田勘探开发工作奠定了坚实可靠的基础，同时该方法的提出为其他油田相似情况提供了一定的参考。

APPLICATION OF GABOR ALGORITHM TO FOOTPRINT ELIMINATION IN POST STACK SEISMIC DATA ACQUISITION

The structure CFD-A, one of the important exploration blocks in the Bohai Bay oil development zone, is located at the juncture of the Bohai Bay Basin, Bozhong depression and Sha Tian uplift. The earlier acquired 3D seismic data often shows strong acquisition footprints. Especially in the Lower Minghuazhen Formation, the lower part of the target layer, acquisition footprints and faults cut each other that seriously affects the right interpretation of the structure and fracture system, and has brought great difficulties to the exploration and production of oil field. Gabor filtering technology selects different azimuth for specific frequency filtering, and may effectively eliminate the footprints on seismic data, and solve the imaging problem of seismic data caused by footprints. The seismic data of the fault system after filtering become clearer, which may better meet the geological requirement of structural interpretation and lay a solid basis for the follow-up oilfield exploration and development work.