Reservoir Protection during the Water Injection in W11-1 Oilfield

The new dynamic scale testing instrument JHDH is used to conduct an experimental study on reservoir protection in the process of water injection in W11-1 Oilfield by using the permeability recovery rate Kd/K0 as the key evaluating indexes from the aspects of mixed ratio of injected water and formation water both before and after chemical injection.The result shows that the tendency of sealing is high as the mixed ratio of injected water(sea water) and formation water is 1:1 at 90℃, after the injection agent is added to the sea water,scaling is reduced,while the permeability recovery rate is higher than 90.0% in core,which can meet the requirements of reservoir protection during the waterflooding.