Experimental study of viscosity reduction by water flooding for heavy oil

In accordance with the geological characteristics of Bohai SZ36-1 oilfield,a compounded system of viscosity reduction through water flooding has been chosen for offshore heavy oil field.This system is low usage volume,low cost, high viscosity reduction rate,highly adaptable and stable.Core flow test shows that,when adding the compounded system into injection water,the effectiveness of water flooding can be improved,the recovery factor improves almost 12% based on conventional water flooding,and the rate of viscosity reduction is over 95%.This is a highly efficient and economic method of recovering heavy oil by viscosity reduction through water flooding.