Technical Requirements of Regulatory Application for CO2 Injection into Deep Saline Aquifers

Safe storage of CO2 in deep saline aquifers requires that the injected CO2 is contained within the geological formation and its conformance is predictable. This presentation summarizes a CO2 injection application made to the Saskatchewan Ministry of Energy for safe storage of CO2 in a deep saline aquifer. Two appraisal wells were drilled, cored (including caprocks), logged, sampled and tested. Well tests were used to determine among other things the injectivity, reservoir properties and fracture gradients. A geological model was constructed based on data obtained from the wells as well as 3D seismic data. This model was then used to predict the behaviour of the CO2 plume, pressure front and storage capacity with a dynamic reservoir simulation model while taking into account the uncertainty in the input parameters. Chemical and geochemical compatibility of injecting CO2 was evaluated both experimentally and numerically. Furthermore, a geomechanical model of the reservoir, overburden and underburden coupled to dynamic reservoir simulation model was constructed to evaluate the caprock integrity, fault reactivation potential and surface heave. Finally, a CO2 containment risk analysis was conducted following which an MMV (Measurement, Monitoring and Verification) strategy was determined based on the risks identified. Necessary baseline measurements were determined.

All content contained within this webinar is copyrighted by Gokhan Coskuner and its use and/or reproduction outside the portal requires express permission from Gokhan Coskuner.

SPE Webinars are FREE to members courtesy of the