Parametric study on the integrity of wellbores in CO2 storage sites

Carbon capture and storage is considered as an amelioration technique to address the increasing level of carbon dioxide in atmosphere. Depleted oil gas reservoirs are potential candidates for long sequestration captured dioxide. The huge number drilled wells these hydrocarbon around world, however, pose a threat integrity geological CO2 projects. These direct connections Earth’s surface even when capped, any defects their structure can become high leakage pathways. To predict consequences this possible loss, model was developed introduced by authors based on coupling geochemical geomechanical alterations benefitting from plastic-damage model. This simulates alteration rock-cement-casing assemblage abandoned sites. In paper, parametric study has been established investigate wellbore at various conditions found underground. results show that separation cement-casing interfaces highly probable injection wells. will maintain within first thousand years after exposure CO2-bearing fluids. Our observations suggest compaction cement-rock interfacial transition zone helps cement sheath its longer period time.