Preparation and application of new polycarboxylic acid for scale inhibition

Abstract In oilfield, scaling caused by water injection is becoming increasingly serious blocking the gathering and transmission pipelines of oilfield resulting in a decline production great loss production. Oil gas leakage pipeline scaling, corrosion perforation has irreversible damage to surrounding environment. this paper, citric acid sodium pyrophosphate are used as main agents, hydrolytic polymaleic anhydride, polyaspartic polyepoxysuccinic respectively compounded establish polycarboxylic scale inhibitor. The inhibition experiments CaCO 3 , CaSO 4 BaSO were carried out obtain new type highly effective inhibitor formula. For best formula 200 ppm + 30 hydrolyzed anhydride. 100 5 polyaspartate.