Estimating CO2-EOR Potential and Co-sequestration Capacity in Ohio's Depleted Oil Fields

Abstract

Abstract The goal of this project is to develop process understanding and evaluate technical and economic feasibility of CO2 utilization and storage in Ohio. Our focus will be on depleted oil fields in the Clinton sandstone in eastern Ohio at depths ranging from 3400 to 5000 ft and the Knox dolomite in North-Central Ohio at depths ranging from 3000 to 8000 ft. These fields appear to be promising candidates for CO2-assisted EOR because of poor primary recovery efficiency that leaves behind ∼80-90% original oil in place. However, a systematic assessment of enhanced recovery and co-sequestration potential in these under-pressured low- permeability depleted oil fields does not appear to have been undertaken – which is the focus of this research project. This paper describes ongoing activities in the areas of source-sink matching, production history assessment, reservoir characterization and fluid property characterization, as well as plans for reservoir simulation.