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双河油田北块两个层系的储层孔隙结构特征
石油与天然气地质
1994年 15卷 第No.4期
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Title
PORE-STRUCTURE CHARACTERISTICS OF RESERVOIRS IN NORTH PART OF SHUANGHE OILFIELD
摘要
双河油田北块三采试验区块Ⅱ、Ⅳ层系储层岩石成分成熟度及结构成熟度均低,自生矿物及粘土矿物种类多,物性及孔隙结构参数变化大,储层微观非均质性及孔喉两极分化严重,微孔隙发育;储层孔隙结构在横向上变化大,微观油水分布形态多样,导致驱油效率低,开发难度大.储层以Ⅱ、Ⅲ类为主,Ⅱ层系条件较差属中低储集类型,Ⅳ层系储层条件较好为中等储集类型.
Abstract
Both the compositional maturity and structural maturity of Ⅱ and Ⅳ reservoir rocks in the north Part of Shuanghe oilfield are relatively low, and the types of authigenic and clay minerats are various, pete-structural diameters and the size of pore-throats varies distinctly, microscopic anisotropy.is high and micro-potes developed wed. The considerable variation of reservoir POre structures in lateral diredion and Plenty of microdistributive pattern of oil and water lead to low oil-expulsion. The reservoirs mentioned above are predominatly type-Ⅱ and type-Ⅲ ones.
关键词：
孔隙结构;
微观非均质性;
储层评价;
驱油效率;
双河北块;
Ⅱ4-6、Ⅳ1-4层系;
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