Abstract: With the development of offshore oilfields in the middle and later stages,problems such as scaling and corrosion in production process pipelines have emerged on the processing platform,seriously affecting the safe operation of offshore production platforms. Oriented by the on-site issues and combined with the laboratory data,the root causes of scaling and corrosion in the production process pipelines are analyzed. Research findings indicate that the sudden increase in concentration of iron ions in the treatment solution of the offshore X oilfield is the main cause of scaling and corrosion in the pipelines. Through measures such as chemical agent injection and upgrading of well flowback management,the concentration of iron ions has been controlled,and the corrosion and scaling in the oilfield pipelines have been continuously improved. The operation status of the production process has been significantly improved,ensuring the safe operation of the oilfield,and providing reference for anti-scaling and anti-corrosion in other offshore oilfields.

Key words: offshore oilfield, scaling, corrosion, iron ion