Study on improving oil recovery using high concentration polymer solution

To search a new EOR method,a study on different injecting period,molecular weight and different slug of high concentration polymer solution (HPAM) on oil recovery were carried out on artificial cores with size of 4.5cm×4.5cm×30cm,Kg of 0.9-1.0 μm2 and Dykstra-Parson coefficient of 0.72.An incremental recovery over water flooding of more than 20% OOIP could be obtained by early time injection and optimization of injection method of the high molecular weight,high concentration polymer solution.The experiment manifests that high concentration polymer flooding is a good way to enhance oil recovery.