济阳拗陷孔店组沉积体系及其构造成因

济阳拗陷是中国东部主要含油气盆地，其地质构造相当复杂，是我国研究含油气盆地最典型的地区.本文以地震和钻井资料为基础，研究了构造对主要储层孔店组沉积体系的控制作用，为油气勘探和开发提供地质依据.孔店组具典型陆相走滑-伸展断陷盆地早期幕式充填的多物源、快速堆积的特征.砂质沉积体系以冲积扇和扇三角洲为主要类型，深洼内为干旱盐湖的膏盐层、灰岩层及韵律层理泥岩层沉积.3种类型的陡坡边界具有近岸沉积的共同特征，但沉积的平面和纵向分布存在差异.与陡坡边界类型相比较，缓坡边界沉积相类型相对简单，冲积扇及近岸水下扇不甚发育，相带宽，沉积物运移较远.

SEDIMENTARY SYSTEM AND STRUCTURAL GENESIS OF KONGDIAN FORMATION IN JIYANG DEPRESSION

The Jiyang Depression, one of the main petroliferous basins in eastern China with fairly complex geological structures, is the most typical area for petroliferous basin study. Based on the seismic and drilling data, this paper studies the structural control on the sedimentary systems of Kongdian Formation which is the main reservoir. The Kongdian Formation is characterized by typical early continental strike-slip and extensional fault basin with fast-accumulated episodic filling of multisource. Alluvial fan and fan delta are the two main types of sandy sedimentary system. Gypsum salt, limestone and rhythmic-bedding mudstone in dry playa are distributed in deep sags. Three types of steep slope boundaries share the common characteristics of nearshore sediments, but differ in horizontal and vertical distribution of sedimentation. Compared with steep slope boundaries, the sedimentary facies of gentle slope boundary are relatively simple with underdeveloped alluvial fan and nearshore subaqueous fan, wide facies belts and farther-transported sediments.