【摘要】 地震沉积学是利用地震资料研究沉积岩及其形成过程的一门新兴学科。地震沉积学主要利用三维地震信息和现代地球物理技术进行沉积体系、沉积相平面展布以及沉积发育史研究,它强调在高精度等时对比层序地层格架的基础上,利用地震资料的横向分辨率、特殊地震处理技术(90°相位调整和地层切片技术),结合关键井岩性资料以及不同成因类型砂体的地貌形态,恢复沉积类型和沉积演化历史。在中亚南部三维地震资料区下白垩统开展地震沉积学应用研究,通过对一系列地层切片的研究,结合钻井岩心信息进行动态解释,获得了研究层段从下至上主要经历了辫状河三角洲相—湖相—三角洲相—湖相—辫状河相的沉积演化过程的认识。图7参19更多还原

【Abstract】 Seismic sedimentology mainly uses 3D seismic information and modern geophysical technology to study sedimentary systems,sedimentary facies spread and its evolution history.In addition,on the basis of the high-accuracy isochronous sequence stratigraphic framework,its focus is to use the horizontal resolution of seismic data and special seismic processing technology(90° phase shift and stratal slicing),in combination with the key wells’ lithologic data as well as geomorphic features of different sand types,to resume sedimentary types and evolution history.Accordingly,we carried out seismic sedimentology studies on the Lower Cretaceous Formation in the 3D seismic area south of Central Asia.We made a dynamic interpretation to the target zone by a series of stratal slices combined with the drilling core information,and obtained that the target zone mainly experienced braided delta facies-lake facies-delta facies-lake facies-braided river facies.更多还原