Study of New type of Temperature-resistant and Salt-tolerant surfactant for Polymer / surfactant Two-component flooding system

In this paper, a new active agent is investigated, which can be used in the condition of high temperature and high salinity, including the ability to reduce interfacial tension and interfacial tension stability, and the preparation of polymer surfactant flooding system with this active agent. Oil displacement experiment is operated by the physical simulation, the homogeneous and heterogeneous artificial cores with permeability of about l¿m2 are used in the experiment. The displacement characteristics have been verified. Experiment results demonstrate that under the conditions of high temperature and high salt, interfacial tension between crude and flooding system can dropped to the magnitude of 10^-3 by this active agent, and it is able to stabilize within 10^-3 for a long time; The polymer / surfactant binary flooding system prepared with this active agent is used in homogeneous and heterogeneous cores. It can enhance oil recovery greatly.