东濮凹陷沙三段盐构造类型及地震识别

Es^3 salt-structural types of Dongpu depression and seismic identification.

东濮凹陷北部地区沙河街组第三段发育三套深湖相盐岩韵律层 ,后期因埋深和构造力作用导致盐岩流动和变形 ,进而形成许多与盐有关的构造或岩性圈闭。由于盐岩总是和深湖相泥岩共生或伴生 ,故盐岩发育区是烃源岩发育区 ,同时也是盐构造和盐圈闭发育区。由于该区具备生、储、盖、圈、保的优越条件 ,所以该区一直是人们的重点研究目标。文中介绍了该区各种与盐变形有关的构造和圈闭类型以及盐的地震反射特征和识别方法 ,并讨论了盐及盐构造对油气的控制作用。

Three sets of salt-bearing cyclothem in deep lacustrine facies are developed in Es 3 formation in the north of Dongpu depression,which led salt rock to flow an d deform because of buried depth and action of structural force in the latter an d then formed many salt-related structures or lithologic traps.Since salt rock is always accompanied by the clay in deep lacusrine facies,the salt-developed area is the developed area of hydrocarbon source rock and also the developed are a of salt structures and salt traps.Since the area has the superior conditions o f source area,reservoir,cap formation,trap and reservation,the area always is ou r studied key target.The paper introduced a variety of salt-deformed-related s tructure and trap types,characters of seismic reflection from salt and identifie d methods,and discussed control action of salt and salt structure on oil-gas.