Abstract
Most compilations of global CO2 storage capacity separate volumes of storage in oil fields from volumes of storage in nonproductive saline formations. In this study we begin to define accessible volumes by strategically combining CO2 use for enhanced oil recovery with large-volume storage in associated saline formations. This variant of carbon capture, use, and storage (CCU&S) is known as stacked storage because it uses the three-dimensional properties of the subsurface to achieve multiple complementary objectives. The motivation for combining CO2 enhanced oil recovery (EOR) and saline-storage types is that where EOR is possible, it provides an attractive market for CO2 but does not alone achieve emission- reduction targets. By spatially and temporally linking CO2 EOR with vertically and horizontally adjacent saline storage volumes, the infrastructure, experience, and community acceptance developed for EOR can provide a substantive boost for using the entire subsurface for storage of very large volumes.Representative fields in major areas of current commercial CO2 EOR served as test cases and were matched with mapped subregional saline-storage potential. Test cases included (1) selected Permian and Pennsylvanian CO2 EOR fields in the Permian Basin of west Texas and New Mexico that were matched with regional, nonproductive Permian saline formations, (2) Cretaceous-age fields (e.g., the SECARB study area at Cranfield) in the Mississippi salt basin that were matched with regional Cretaceous Tuscaloosa saline formations, and (3) salt-dome marginal and growth-fault rollover fields in the Oligocene Frio Formation of the Texas Gulf Coast that were matched with regional Tertiary-age saline formation. In each case, good matches were obtained between CO2 EOR markets and adjacent saline formations. Other saline formations underlie and are separated from the productive zone by their own confining systems. Limitations on the application are also considered.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
