Reconnaissance Assessment of the CO2 Sequestration Potential in the Triassic Age Rift Basin Trend of South Carolina, Georgia, and Northern Florida

摘要

A reconnaissance assessment of the carbon dioxide (CO2) sequestration potential within the Triassic age rift trend sediments of South Carolina, Georgia and the northern Florida Rift trend was performed for the Office of Fossil Energy, National Energy Technology Laboratory (NETL). This rift trend also extends into eastern Alabama, and has been termed the South Georgia Rift by previous authors, but is termed the South Carolina, Georgia, northern Florida, and eastern Alabama Rift (SGFAR) trend in this report to better describe the extent of the trend. The objectives of the study were to : (1) integrate all pertinent geologic information (literature reviews, drilling logs, seismic data, etc.) to create an understanding of the structural aspects of the basin trend (basin trend location and configuration, and the thickness of the sedimentary rock fill), (2) estimate the rough CO2 storage capacity (using conservative inputs), and (3) assess the general viability of the basins as sites of large-scale CO2 sequestration (determine if additional studies are appropriate). The CO2 estimates for the trend include South Carolina, Georgia, and northern Florida only. The study determined that the basins within the SGFAR trend have sufficient sedimentary fill to have a large potential storage capacity for CO2. The deeper basins appear to have sedimentary fill of over 15,000 feet. Much of this fill is likely to be alluvial and fluvial sedimentary rock with higher porosity and permeability. This report estimates an order of magnitude potential capacity of approximately 137 billion metric tons for supercritical CO2. The pore space within the basins represent hundreds of years of potential storage for supercritical CO2 and CO2 stored in aqueous form.