Study on Compatibility of Injected Water with Reservoir in Oilfield

Ion concentration analysis and turbidity analysis are used to study the static compatibility of natural sea water and stratum water.Core flow test is applied to study the dynamic compatibility.The result shows that injected water in W12-1 is not compatible with researvior.And the compability decreases and the harmness to core enhances when the temperature rises.In the process of displacing by natural sea water,with the volume of displacing agent increasing,the cumulative scaling becomes worse,and the natural sea water and stratum displacing may do so great harm to the core that the permeability rate is lowered to 32.3%.As a result,natural sea water can not be used as injected water source directly.