CCS and Power Systems
Carbon Storage - Regional Carbon Sequestration Partnerships/Injection Projects
Enhanced Coal Bed Methane Production and Sequestration of CO2 in Unmineable Coal Seams
Project No: FC26-01NT41148
To date, approximately 3,265 metric tons of CO2 have been injected at pressures of up to 930 pound-force per square inch gage (psig).
A step-rate pressure test was performed to determine if conditions would allow for the injection of CO2 at higher pressure in order to increase injection volumes. The West Virginia Department of Environmental Protection (WVDEP) accepted the results and allowed CONSOL to increase pressure to approximately 1,400 pounds per square inch (psi). Injection pressures were increased from 930 psi to 1,060 psi, facilitating an increase from five tons/day to approximately 17 tons/day. This supports the objective to demonstrate that CO2 storage is a viable option in coal seams.
No breakthrough of CO2 has been observed in any of the production wells, supporting the objective to demonstrate that CO2 remains stored in the coal seam.
Production wells may be showing signs of increased methane production as a result of increased sustained injection rates. This demonstrates the economic benefit associated with producing coal bed methane during carbon storage operations.