Comparative study on transmission and migration capacity of three different oil displacement systems in Bohai Q oilfield

In order to select the oil displacement system more suitable for Bohai Q oilfield, under the simulated reservoir conditions(temperature is 63 ℃, formation water salinity is 4 500 mg/L, surface viscosity of degasified crude oil is 75 mPa·s) and the perforation shear effect of the oil displacement system before entering the reservoir, by using rheometer, dynamic and static light scattering meter, chemical drive physical simulation device and other equipment, the molecular structure, solution performance and transport ability in core of WQ and HG oil displacement systems were analyzed and compared with ordinary polymer(HPAM). The experimental results show that the order of transmission and migration capacity of the three oil displacement systems is: HPAM>HG>WQ.