Petrophysical characterization of the South Georgia Rift Basin for supercritical CO2 storage: a preliminary assessment

New insights into lithology and hydrogeology of the northern Newark Rift Basin

“…The data suggest that coarse fluvial sandstones have medium to low matrix porosity (2–15%) and low permeability (10 −3 −10 −1 mD), attributed to poor sorting, high angularity and small pore throats [ Akintunde et al ., ]. In contrast, high porosity (25–35%) and permeability (10–100 mD) were recorded in about half a dozen samples from fine‐grained red lacustrine strata, resembling those of the Newark basin [ Akintunde et al ., ]. These results suggest finer‐grained lacustrine strata may have superior reservoir properties to the coarse‐grained fluvial sandstones due to better sorting, and that in the Newark basin, reservoir properties of the finer‐grained lacustrine formations should also be evaluated.…”

“…At the same time, our data unambiguously show that the Palisade Sill itself does not contain any hydraulically conductive zones and may thus serve as a caprock for underlying reservoirs (Figure ). Petrological and petrophysical analysis of diabase sill samples from the SGR basin also showed uniformly low or zero porosity and permeability, suggesting excellent sealing properties [ Akintunde et al ., ]. The combination of impermeable diabase overlying transmissive fractures in the basal contact zone of a rift basin intrusion, if sufficient reservoir quality is established in that zone, may provide a suitable reservoir‐caprock structure for secure for CO 2 storage.…”

“…As a part of concentrated effort by the U.S. Department of Energy (DOE) in partnerships with major private and state organizations, multiple sedimentary basins throughout the country are being assessed for CO 2 storage potential [e.g., Rodosta et al ., ; Litynski et al ., ]. On the eastern North American margin they include the onshore Mesozoic Newark Rift Basin and offshore South Georgia Rift Basin, thought to be the largest on this margin but buried below the Cretaceous‐Cenozoic Coastal Plain sediments of South Caroline, Georgia, Alabama and Florida [ Akintunde et al ., ]. The advantages of Newark basin include its proximity to many CO 2 emitters [e.g., Goldberg et al ., ; Tymchak et al ., ], easy accessibility, and significant amount of information about the basin accumulated in prior studies, which included studies of field outcrops [e.g., Olsen , ; Cornet and Olsen , ], core holes [e.g., Kent et al ., ; Olsen et al ., ; Reynolds , ], and seismic‐reflection surveys [ Costain and Coruh , ; Reynolds , ; Withjack et al ., ].…”

CO2storage in heterogeneous aquifer: A study on the effect of injection rate and CaCO3concentration

“…CO2 behaves as a supercritical fluid in storage mediums located at a depth of greater than 800 meters [1]. Aquifers located at 1-3 km below the surface are permeable geologic layers saturated with saline water, and confined with a caprock [2].…”

Injectivity and quantification of capillary trapping for CO 2 storage: A review of influencing parameters

“…There have been many reports published in the past decades indicating a significant increase in the amount of greenhouse gas and CO 2 in the atmosphere (Akintunde et al, 2013;Bachu, 2003;Metz et al, 2005;Polak et al, 2015). Storage is a key technology to mitigate this negative impact of CO 2 on the environment by injecting it into subsurface geological mediums such as depleted oil and gas reservoirs, deep coal beds, and deep saline aquifers (Ketzer et al, 2012;Okabe et al, 2008;Orr, 2009;Solomon, 2007;Surdam, 2013).…”