摘要
以胜坨油田二区沙二段砂岩油层岩性、孔隙分布及结构的研究资料为依据 ,用含油薄片分析了该区沙二段砂岩油层剩余油微观分布特征及其影响因素。分析结果表明 ,剩余油分布有珠状、凝块状、环状、连片状、条带状等六种形态 ;影响剩余油分布的因素主要有岩石的层理、孔隙结构、岩石的结构成分及其润湿性。提出了先驱替底部剩余油 。
Microscopic distribution feature and its influencing factors of the remaining oil in Es\-2 sandstone reservoirs of No.2 area in Shengtuo oilfield are analyzed using oil-bearing thin section on the basis of data on lithology, porosity distribution and structure in this area. The results show that the distribution of the remaining oil has five forms of bead-, clot-, ring-, sheet and belt-like; the main influencing factors are bedding, porosity structure, composition and wettability of the rock. This paper makes proposals for displacing the bottom remaining oil first and then injecting plugging agent to control upward encroachment by bottom-water and enhance oil recovery of the upper reservoir.
出处
《油气地质与采收率》
CAS
CSCD
2002年第1期60-61,共2页
Petroleum Geology and Recovery Efficiency
基金
中石化集团"十条龙"攻关项目 (P980 2 5 )
关键词
含油薄片
胜坨油田
高含水砂岩油层
剩余油
微观分布特征
oil-bearing thin section, Shengtuo oilfield, sandstone reservoir with high water cut, remaining oil, microscopic distribution feature
