渤东低凸起构造演化及成藏条件

An analysis of structure evolution and reservoiring conditions in the Bodong low salient of Bohai Basin

王应斌 王海军 孙和风

WANG Ying-Bin WANG Hai-Jun SUN He-Feng-

渤东低凸起位于渤海海域中部偏北地区,其形态为近北东走向的狭条状,东西剖面呈两断夹一隆的地垒形态。三套断裂体系形成了渤东低凸起深层东西分块、浅层南北分带的复杂构造特征。低凸起的构造演化可以分为凸起形成期(前古近纪东营期)、走滑构造发育期(古近纪东营期)和新构造运动期(新近纪)。由于渤东低凸起独特的地理位置,决定了渤东低凸起良好的成藏条件,三个凹陷的供烃作用、三套储层的聚烃作用、三种运移通道的输导作用、三类圈闭的藏烃作用以及良好的后期保存为低凸起的油气成藏提供了有利的保证。

The Bodong low salient is located in the central-north part offshore Bohai bay.It is a narrow N-E trending strip appearing as a horst with two faults sandwiching an uplift on the E-W section.Three sets of fault systems shape the salient into a complex structure with the deep layer being segmented in E-W direction and shallow layers being zoned in N-S direction.The salient experienced three evolution stages: the forming period,the strike-slip structure development period,and the neotectonics period.The unique geographical position of the salient played a determinant role in forming reservoirs with favorable pooling conditions.It has three hydrocarbon kitchens,three sets of reservoirs,three kinds of carrier system,and three types of traps as well as good seals,all of which provide favorable conditions for hydrocarbon pooling.

10.11743/ogg20100203