CO2-SCREEN tool: Application to the oriskany sandstone to estimate prospective CO2 storage resource

Abstract The ability to accurately predict the CO 2 storage resource in saline formations is important to make high-level, energy-related government policy and business decisions. CO 2 -SCREEN (Storage prospeCtive Resource Estimation Excel aNalysis) is a tool developed by the United States Department of Energy − National Energy Technology Laboratory (US-DOE-NETL) to screen saline formations for prospective CO 2 storage resources. CO 2 -SCREEN uses DOE methods and equations to serve as a consistent mechanism for calculating prospective CO 2 storage resources. CO 2 -SCREEN is comprised of two files: an Excel file used for inputs and outputs and a GoldSim Player file used to run Monte Carlo simulations. CO 2 -SCREEN requires input of physical geologic parameters (i.e. thickness, porosity) as well as efficiency factor ranges (i.e. net-to-gross thickness) to calculate a mass storage estimate. An application of CO 2 -SCREEN is demonstrated here using well log data from the Oriskany Sandstone portion in Pennsylvania. The Oriskany Sandstone is divided into 20 km x 20 km grid cells in which 151 cells contain well log data. CO 2 -SCREEN calculates prospective CO 2 storage resource for each grid cell based on the well log data and uses lithology and depositional environment information for efficiency factor ranges. The Oriskany Sandstone CO 2 storage resource estimate for Pennsylvania, calculated by CO 2 -SCREEN, ranges from 0.07 to 1.28 gigatons (Gt) with a P 50 value of 0.32 Gt. This resource assessment analysis is done to demonstrate the use of CO 2 -SCREEN and results are comparable to previous studies which encourages the application of CO 2 -SCREEN to other saline formations and warrants exploring the expansion of this tool to assess the CO 2 storage resource in other formations such as shale and depleted oil and gas reservoirs.