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98059 PREDICTION OF EROSION-CORROSION PENETRATION RATE IN A CO2 ENVIRONMENT WITH SAND

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Product Number: 51300-98059-SG
ISBN: 98059 1998 CP
Author: S. A. Shirazi, E. Dayalan, E. F. Rybicki
Industry: Oil and Gas Production
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In oil and gas wells producing CO2 saturated water, carbon steel piping can corrode rapidly depending on the nature of the hydrocarbon phases produced and on flow and environmental parameters. In some CO2 environments, a protective iron carbonate scale can form on carbon steel piping walls and reduce corrosion rates to within acceptable design limits. If sand is also being produced, protective scales can be removed or prevented from forming on piping walls at points where sand particles entrained in the flowstream impinge the walls. When this happens, bare metal corrosion is enabled at these impingement points and corrosion rates again reach high levels. This process involves both erosion and corrosion mechanisms and is often referred to as “erosion-corrosion.” In some cases, pitting occurs at impingement points resulting in extremely high penetration rates.
In oil and gas wells producing CO2 saturated water, carbon steel piping can corrode rapidly depending on the nature of the hydrocarbon phases produced and on flow and environmental parameters. In some CO2 environments, a protective iron carbonate scale can form on carbon steel piping walls and reduce corrosion rates to within acceptable design limits. If sand is also being produced, protective scales can be removed or prevented from forming on piping walls at points where sand particles entrained in the flowstream impinge the walls. When this happens, bare metal corrosion is enabled at these impingement points and corrosion rates again reach high levels. This process involves both erosion and corrosion mechanisms and is often referred to as “erosion-corrosion.” In some cases, pitting occurs at impingement points resulting in extremely high penetration rates.
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