Study of depressurizing and augmenting injection using active nanometer powder in Shasanzhong 6-10 reservoir of Pucheng Oilfield

Bad injected water quality have damaged formations and made injection pressure step up in Shasanzhong 6-10 low permeable reservoirs.To control pressure step-up,indoor experiment has been done using active nanometer to depressurize and do augment injection.Selecting active material,surface qualified agents,dispersed medium,and optimum concentration of nanometer powder,this paper points out feasibility of nanometer acidizing.By studying in lab,we tested 10 wells and got good effects.