A Systematic Assessment of Enhanced Oil Recovery and Co-Sequestration Potential for CO2 in Ohioâ€™s Depleted Oilfields
- Conference: Carbon Management Technology Conference
- Year: 2015
- Proceeding: 2015 Carbon Management Technology Conference
- Group: CO2 Utilization and Geological Storage
- Time: Wednesday, November 18, 2015 - 1:10pm-1:35pm
The goal of this study is to develop process understanding and evaluate technical and economic feasibility of CO2 utilization foe enhanced oil recovery (EOR) and geologic storage in Ohio. Our focus is on depleted oil fields in the Clinton sandstone (Eastern Ohio) and the Knox Dolomite Group (North-Central Ohio). These fields are promising candidates for CO2-assisted EOR because of poor primary recovery efficiency that leaves behind approximately 80–90% of the original oil in place. A systematic assessment of EOR and co-sequestration potential for CO2in these depleted oil fields has not been undertaken to date – which is the objective of this research project. In this paper, we will describe our findings related to:
- Source-sink matching for characterizing potential stationary sources of CO2 with respect to their location and size, and comparing that to the distribution of depleted oil fields using pipeline routing tools,
- Production history assessment for evaluating CO2 sequestration potential based on production-based voidage replacement calculations,
- Reservoir characterization for developing geologic framework models for “reference” reservoirs in the Clinton and Knox formations via integration of well-log and core analysis data,
- Fluid property characterization for evaluating empirical correlations to predict oil, gas, water, and CO2 pressure-volume-temperature (PVT) relationships,
- Reservoir simulation studies based on the geologic framework models to better understand field-scale areal and vertical sweep efficiencies for both continuous and water-alternating-gas CO2-EOR processes, and
- Economic analyses including compilation of capital and operating expenses representative of field conditions in Ohio; and cost-benefit analysis for CCUS operations.
This project is funded by the Ohio Development Services Agency and co-funded by the Midwest Regional Carbon Sequestration Partnership (MRCSP).