The Physical Simulation Technology Research Of Weak Base Alkali-surfactant-polymer Lfooding

In recent years，major reservoir is the principal object of the oil field’s research anddevelopment，with the growing degree of mining，the exploiting potential of the majorreservoir is descending year by year.The research and development of the class Ⅱ andⅢreservoir whose physical property is worse than the major reservoir cause more and moreattention of the oil field.According to the present developing situation of the class Ⅲ reservoir in daqing，through the core flowing experiment indoor，the thesis selected two kinds of water types andthree kinds of polymers which were offered by the site，assayed the nature of ASP floodingwhich was made up of them and the changes of weak base ASP displacement agent in the oildeposit， and finally assessed the dynamic displacement effects of weak base ASPdisplacement which was made up of them.The results showed that：the interfacial tension ofthe ASP liquor which was made of two kinds of water types and three kinds of polymers canreach10-3mN/m when the alkalinity of it reached0.8%~1.0%and the activator consistence ofit reach over0.2%.It was very stable that the viscosity and interfacial tension of the lead slug、the follow-up protection and the ASP lord slug which were made of two kinds of water typesand three kinds of polymers.The onway resistance coefficient of ASP becomed larger withPVI increasing，when it was time for subsequent water flooding，the residual resistance factorbecomed smaller with PVI increasing，and finally was steady.The onway interfacial tensionbecomed smaller with PVI increasing，after it reached the lowest，it becomed larger with PVIincreasing.When the liquor of ASP was flowing in the core，its onway viscosity reduced verymuch and its viscosity loss rate was very high.The liquor viscosity of ASP which was madeup of different molecular weight polymer was low in the whole flow.The polymer solutionconcentration of the ASP which was made up of low molecular polymer was over2750mg/L，the chemical drive process was over11%；The polymer solution concentration of theASP which was made up of7million molecular weight KYPAM was over800mg/L、thepolymer solution concentration of the ASP which was made up of middle molecular polymerwas over1000mg/L，the chemical drive process of them was over20%；...