Integrated CO2-H2S corrosion-erosion modeling in gas production tubing and pipeline by considering passive layer activity

Abstract Corrosion and erosion are the common pipe-integrity issues that occur when carbon dioxide, hydrogen sulfide sand exist in gas stream at same time. is developed by reaction among iron, while physical damage through flowing sand. When it comes to prediction model which could accommodate both events, complex phenomena related physics, chemistry metallurgy should be put into account. In this paper, we develop a new-integrated corrosion-erosion can calculate rate considering interactions type of passive layer (mackinawite siderite), formation removal layer, surface rate. The integrated consists fluid flow pipes equation, kinetics reaction, fundamental diffusion law, empirical equation Faraday’s law. Corrosion-erosion obtained iteration scenario after establishing pressure temperature from equation. Pipe dimension used simulation has tubing ID 2.992 for vertical pipe flowline horizontal pipe. Simulations were conducted using hypothetic field data with variation dioxide composition. constant rate, percentage significantly greater than corrosion more dominant formation. However, sulfide, tends form, resulting scaling. These results explained faster siderite mackinawite. Finally, proposed explain clearly scaling simplifying occurred.