SECARB CO2 injection test in mature coalbed methane reservoirs of the Black Warrior Basin, Blue Creek Field, Alabama

The SECARB Black Warrior field verification test employed a diverse suite of well testing and monitoring procedures designed to determine the injectivity, capacity, heterogeneity, and performance of mature coalbed methane reservoirs. A total of 3250bbl of water and 252t of CO2 were injected into coal in a battery of slug tests. These tests demonstrate that significant injectivity exists in Black Warrior coalbed methane reservoirs and that reservoir heterogeneity is a critical factor to consider when implementing CO2 sequestration and CO2-enhanced recovery programs.