Coupled Hydromechanical Modeling of Co2 Sequestration in Deep Saline Aquifers
نویسندگان
چکیده
Sequestration of carbon dioxide (CO2) in deep saline aquifers has emerged as an option for reducing greenhouse gas emissions to the atmosphere. The large amounts of supercritical CO2 that need to be injected into deep saline aquifers may cause large fluid pressure increases. The resulting overpressure may promote reactivation of sealed fractures or the creation of new ones in the caprock seal. This could lead to escape routes for CO2. In order to assess the probability of such an event, we model an axysimmetric horizontal aquifer-caprock system, including hydromechanical coupling. We study the failure mechanisms, using a viscoplastic approach. Simulations illustrate
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