东营凹陷平南断层包裹体特征与油气运移

结合平南-平方王地区的区域地质概况分析了平南大断层的形成演化过程,对打穿该断层的滨古26井岩心进行了取样,并对断层附近样品中的流体包裹体进行了形态学和显微测温分析.根据研究区地层演化史,包裹体的形态分布及均一温度统计结果证实断层经过了反转过程,并且成为油气运移的主要通道.同时,从实验结果可以看出断层经历了两期油气运移,由于第一期油气主要为轻烃,加上当时古潜山储集空间发育不够,使得油气沿着断层向上运移,所以在上盘出现两期包裹体.而在第二期油气通过断层时,古潜山出现的大量裂缝为油气提供了充分的储集空间,使得油气可以被储存下来,所以在下盘的样品中基本出现第二期包裹体.

Characteristics of Fluid Inclusions and Oil-gas Migration in Pingnan Fault of Dongying Sag

In this paper,the formation and evolution of Pingnan fault were analyzed base on the geological characters of Pingnan-Pingfangwang.Some fluid inclusions in specimens from Binggu 26 well were analyzed on shape and microthermometric.The statistical result illustrates that Pingnan fault have undergone positive and negative inversion movement and petroleum from Boxing sag have migrated twice.Because the most of petroleum generated at the first period was light hydrocarbon and the reserve space in burial hill is not enough at this time,so two periods fluid inclusions appear in hanging-wall.However,when the second periodic petroleum passed the fault,a lot of fracture appeared in burial hill and these supplied the reserve space for petroleum.so petroleum may be keep.Thus only one period fluid inclusions was observed in footwall.