白家海凸起侏罗系段(J_1b_1)储集层特征与含油性关系——以彩34井区为例

Relation Between Reservoir Characters And Oil-Bearing of The First Segment of Badaowan Formation(J_b_1) in Jurassic in Baijiahai Arch --Cai 34 wellblock to be set as a example

针对白家海凸起侏罗系J1b1段储层油水同出的情况 ,有必要开展储集层研究与含油性评价。本文利用岩心样品、测井及试井资料 ,通过各种分析、测试等手段 ,论述了研究区八一段碎屑岩的岩石类型、孔隙结构、物性及流体的相渗特征。发现白家海凸起八道湾组八一段存在如下油气藏特征 :储层的含油性与碎屑岩粒度及岩石物性具有一定的相关性 ;根据储层物性、微观特征 ,认为储层物性是影响含油气性的关键 ;压实作用使储层物性变差 ,导致含油饱和度不高 ;本区储层的孔隙结构特性、含油饱和度、相渗特征等决定了八一段储层的产液特征。

To counter the case that the first segment of Badaowan Formation(J 1b 1) in Jurassic produces oil and water at the same time , it is necessary to analyze reservoir characters and evaluate oil-bearing of the reservoir. In this article , Data of log , welltest and core samples have been used to analyze the reservoir with its lithology , porosity construction, physical properties and relative permeability of fluid within it. The reservoir characters of the first segment of Badaowan Formation(J 1b 1) in Jurassic in Baijiahai Arch have been found as follows: 1. Reservoir's oil-bearing has a certain relation with grain size and physical properties of the detrital rock; 2. According to the analysis of physical properties and micro-characters of the reservoir , we think that physical properties of the reservoir is the key factor to affect oil-bearing of it , and compaction causes storage capacity of the reservoir poor, resulting in low oil saturation. 3. Production capacity of The First Segment of Badaowan Formation(J 1b 1) in Jurassic in Baijiahai Arch is determined by the reservoir's characters: porosity construction, oil-saturation and mutual permeability of fluid within it.