【摘要】 研究工区位于北黄海海域陆相断陷沉积盆地内,该区多期构造运动叠加,断裂发育,地震资料品质差。中生代为其主要勘探目的层,为一已证实的含油气区域。结合本区地质特点,对该区进行三维地震解释时所采用的综合解释技术进行了总结,主要包括三维地震资料品质分级评价技术、无VSP井区空间层位标定技术、层位自动追踪技术、三维可视化解释、多属性体断裂解释技术和变速成图技术等实用的解释技术。多种解释手段的联合应用高质高速地完成了本复杂构造区的构造精细解释,完善了该区的解释方案,理顺了复杂断层的切割关系,识别了活动较弱的小断层。特别是对高精度三维速度场的建立,实现了变速成图,消除了高陡构造区速度陷阱所带来的构造假象,为对该复杂区的地震解释和圈闭形态的落实以及进一步的井位部署与地质评价提供了依据。更多还原

【Abstract】 The study area is located in the North Yellow Sea Basin,an oil-bearing basin with main exploration target in the Mesozoic confirmed by previous work.The faulted basin is filled with clastic deposits and has experienced multi-phases of tectonic movement.There occurs a complex fault system,which leads to the poor quality of seismic data.Based on the geological features of the area,the paper made a summary of the comprehensive 3d fine seismic interpretation technology,including the multi-level quality evaluation technology for 3d seismic data,space horizon calibration technology for none-VSP area,horizon auto-tracking technology,3d visualization interpretation technology,multi-attribute-cubes interpretation technology and velocity variable mapping technology.Integrated application of this interpretation technology made us effectively completed structural interpretation of this complex structural area.Results proved the success of interpretation technology.Small faults were recognized and fault combinations optimized.Especially,velocity variable mapping is achieved after the establishment of a 3d velocity field,which could eliminate the false structural interpretation caused by velocity trap in steep area.This integrated new technology provided better basis for identification of traps,design of exploration wells and geological evaluation of a complex area.更多还原