摘要
采用自制的新型黏弹性表面活性剂(VES-TCJ),配制出性能稳定的变黏酸。通过模拟变黏酸与碳酸盐岩反应形成的成胶酸,考察了不同无机盐离子对变黏酸的流变性的影响。试验结果表明,Ca2+和Mg2+均能使变黏酸获得较大的表观黏度,在储层酸化过程中起到转向分流作用;在高矿化度地层中变黏酸仍具有较大的表观黏度;少量的Fe3+对变黏酸的变黏特性影响较小,但Fe3+浓度较高时变黏酸的黏度急剧下降,将失去转向分流能力。
Viscosity -variable acids with stable performance were prepared in laboratory using self- made new viscoelastic surfactant （ VES - TCJ）. The effects of different inorganic ions on the rheological properties of the viscosity - variable acids were investigated by simulating acid - rock reaction to form gelling acid. The experimental results showed that both Ca2~ and Mg2~ greatly increased the apparent viscosity of the acid system, thus viscosity -variable acids could play the role of diversion in reservoir acidization. The apparent viscosity of the viscosity - variable acid was still high in reservoir with high salinity. The effect of a small quantity of Fe3~ on the viscosity of the acid system was little, but the apparent viscosity of the viscosity - variable acid could rapidly decrease and viscosity -variable acid could lose the diversion function when the Fe3~ concentration was enough high.
出处
《精细石油化工进展》
CAS
2012年第7期1-4,共4页
Advances in Fine Petrochemicals
基金
山东省科技攻关计划项目(No.2010GSF10601)
关键词
酸化
变黏酸
无机盐离子
流变性
表观黏度
acidization
viscosity - variable acid
inorganic ion
rheological property
apparent viscosity
