Abstract
Many depleted oil and gas reservoirs are targets for commercial CO2 enhanced oil recovery, resulting in associated CO2 storage which occurs as part of the process. These oil fields have legacy wellbores that may contain a leakage pathway. Corrosion or degradation can occur anywhere along the wellbore through or along the cement, casing, tubing, or plugs and is a challenging issue facing the oil and gas industry. Two case studies presented here are legacy wells in the Weyburn oil field with substantially different CO2 injection rates. These case studies aim to help understand casing corrosion in CO2-rich environments.
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