Interfacial Characteristic Of Flooding System With Surfactant And Its Effect On Chemical Flooding

The mechanism research on chemical flooding enhances oil recovery involves the fields of rheological property, interfacial behavior and so on. They all based on change to the beneficial way.In this thesis, using HPAM, alkali and carboxyl betaine surfactant, based on measured the interfacial tension between the flooding system and oil, the affection of concentration on interfacial tension is analysed. Using OCA-20, the surface free energy of store and interfacial tension of flooding system is researched, the affection of concentration and temperature is analysed, adhesion work's effect on chemical flooding and displacement efficiency is analysed. Through oscillation method, the elasticity modulus and viscosity modulus is researched, the affection of concentration, temperature and oscillation frequency is analysed. Through the systematic study on interfacial behavior, driving ability of interfacial film can be understood deeply, the description of physical and chemical phenomenon is developed, microcosmic oil displacement mechanism is fully interpreted and the development of oil displacement agents is accelerated. The study on interfacial behavior redounds to selecting oil displacement agents and designing reasonable method of EOR/IOR.