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碱对复合体系启动中、低渗透层的影响及机理
引用本文:侯吉瑞,刘中春,岳湘安.碱对复合体系启动中、低渗透层的影响及机理[J].油气地质与采收率,2002,9(5):51-53.
作者姓名:侯吉瑞  刘中春  岳湘安
作者单位:石油大学·北京
基金项目:中国石油天然气集团公司 1999年滚动课题“多元复合驱应用基础研究”的部分研究内容 (课题编号 990 5 0 9-0 3 -0 5 )
摘    要:利用渗透率变异系数为0.72的三层非均质加隔层物理模型和合注分采方式,研究了碱浓度变化对启动中、低渗透层的影响。结果表明,低碱复合体系因粘弹性高可以更多地采出中、低渗透层的残余油,而高碱体系因极大地降低了体系的粘弹性,启动中、低渗透层的能力最差;利用原子力显微镜“看到”碱的加入,使聚合物分子卷曲成较大尺寸的线团,致使复合体系的粘性、弹性降低,在HAAK-RS150型流变仪上测定的流变曲线也给予了佐证。

关 键 词:  三次采油  复合体系  渗透层  影响  机理  复合驱油  波及体积  聚合物  分子形态
文章编号:1009-9603(2002)05-0051-03
修稿时间:2002年4月11日

Effect and mechanism of alkali on starting middle or low permeability layers of combination system
Hou Jirui,Liu Zhongchun,Yue Xiangan..Effect and mechanism of alkali on starting middle or low permeability layers of combination system[J].Petroleum Geology and Recovery Efficiency,2002,9(5):51-53.
Authors:Hou Jirui  Liu Zhongchun  Yue Xiangan
Abstract:The effects of sodium hydroxide (NaOH) concentration on starting middle or low permeability layers have been studied by the experiments on heterogeneous physical models with three layers of different permeability and intermediate layers. The permeability variation factor of models is 0.72. The experimental project is in a way of commingled injection and separate production. The results show that the combination system with low alkali can displace more residual oil in middle or low permeability layers due to high viscoelasticity; while the combination system with high alkali has worst capacity to develop middle and low permeability layers for viscoelasticity is reduced greatly. The polymer molecules were curled over big size threads due to adding alkali that is saw in atomic power microscope. The threads result in the decreasing of viscosity and elasticity of the system. The rheological diagram of the system measured by HAAK-RS150 rheometer has also confirmed the results.
Keywords:alkali  combination drive  swept volume  polymer  molecule configuration
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