CO2 storage projects need to assess 1) the extent and magnitude of pressure elevation and 2) the maximum extent to the CO2 plume at stabilization. Pressure response to injection is a requirement of the EPA underground injection control (UIC) program. Increased reservoir pressure could create sufficient driving force to lift brine into underground sources of drinking water (USDW). This contamination risk is what the UIC program is designed to manage. The area where such driving force may be created is known as Area of Review (AOR) and must be assessed as part of the project development and permitting process. The extent and magnitude of pressure elevation is also needed to assure that injection wells are sufficiently offset so interference and reduced storage capacity is managed. CO2 is buoyant compared to reservoir brine, this also provides driving force that would allow escape of CO2 in areas over the mobile-phase CO2 plume therefore plume stabilization is also needed as part of the AOR evaluation. Plume stabilization assessment is also a part of obtaining pore space rights. Assessment of the pressure elevation and plume stabilization require reservoir modeling tools such as reservoir architecture, petrophysical and fluid properties. In addition, the relevant boundary conditions are an important component of the modeling.
This event is both in-person and virtual. Speaker is presenting virtually.