摘要
驱油效率是油田注水开发的重要指标,目前大多由实验室水驱岩心实验得到。实验室测定的只是最终水驱驱油效率,不能用来描述开发过程的相关状况。从驱油效率定义出发,以胜利油区资料为基础,回归了储层空气渗透率与束缚水饱和度的关系,并通过相渗曲线和水驱特征曲线的关系,利用生产数据求取驱油效率。在此基础上,分析了空气渗透率、油水粘度比、注入倍数对驱油效率的影响。研究结果表明,在一定条件下,驱油效率随储层空气渗透率、油水粘度比、注入倍数增加而增加。该方法为预测胜利油区驱油效率提供了一种新途径,对初期未做室内相渗曲线实验的油区(或区块)来说,可以快捷、简便地计算矿场驱油效率并分析其影响因素。
Displacement efficiency is an importantindicator for water-flooding oil field,and it is often obtained by lab core test.However,what it has been calibrated is the final recovery factor,and it can't characterize the development performance in different development phases.Based on the definition of displacement efficiency and field production data of Shengli oilfield,this paper presented the regression relationship between air permeability and irreducible water saturation,and then the displacement efficiency is deduce with the help of permeability-ratio curve and water drive characteristic curve.This paper analyzed the relationship among air permeability,and oil-water viscosity ratio and PVI.The new model herein shows that displacement efficiency increases with the rise of air permeability,oil water ratio and total injection volume.This is also a new method to calculate displacement efficiency effectively,especially for oil field or oil block without relative permeability curve.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2010年第3期99-101,共3页
Petroleum Geology and Recovery Efficiency
基金
中国石化股份公司科研攻关项目"特高含水期油田开发评价体系及力法研究"(P03025)
关键词
驱油效率
注入倍数
油水相渗曲线
水驱特征曲线
displacement efficiency
pore volume injection
relative permeability curve
water drive curve
