Browsing by Subject "CO2 Sinks"
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Item Potential Sinks for Geologic Storage of CO2 Generated in the Carolinas(2007-04-07) Smyth, Rebecca C.; Hovorka, Susan D.; Meckel, Timothy A.; Breton, Caroline L.; Paine, Jeffrey G.; Hill, Gerald R.This document summarizes a scoping study of the current state of knowledge of carbon storage options for our geographic area. The focus is on one aspect of carbon capture and storage—identification of deep saline aquifers in which carbon dioxide (CO2 ) generated in the Carolinas might be stored. The study does not address other aspects of CO2 storage projects, such as capture and compression of the gas, well construction and development, or injection. Transport of CO2 is touched upon in this study but has not been fully addressed. The information contained in this document is primarily from review of published geologic literature and unpublished data. No field data collection has been completed as part of this study. Further work will be necessary to increase confidence in the suitability of the potential CO2 storage sites identified in this report. This study does not address the regulatory, environmental, or public policy issues associated with carbon storage, which are under development at this time.Item Source-Sink Matching and Potential for Carbon Capture and Storage in the Gulf Coast(Proceedings of the 2006 UIC Conference of the Groundwater Protection Council, 2006) Ambrose, William A.; Breton, Caroline L.; Duncan, Ian; Holtz, Mark H.; Hovorka, Susan D.; Núñez-López, Vanessa; Lakshminarasimhan, SrivatsanCurrent global levels of anthropogenic CO2 emissions are 25.6 Gigatons yr. Approximately 1 Gigaton comes from the Texas, Louisiana, and Mississippi Gulf Coast, representing 16 percent of the U.S. annual CO2 emissions from fossil fuels. The Gulf Coast region provides an opportunity for addressing the problem. Geologic sequestration results from the capturing of CO2 from combustion products and injecting the compressed gas as a supercritical fluid into subsurface brine aquifers for long-term storage. The Gulf Coast overlies an unusually thick succession of highly porous and permeable sand aquifers separated by thick shale aquitards. The Gulf Coast also has a large potential for enhanced oil recovery (EOR), in which CO2 injected into suitable oil reservoirs could be used first for EOR and then for large-volume, long-term storage of CO2 in nonproductive formations below the reservoir interval. For example, there are numerous opportunities for locating CO2 injection wells either in fields for EOR or in stacked brine aquifers near potential FutureGen sites, where a near-zero emission facility would generate primarily hydrogen and CO2 as by-products. We estimate that in the Gulf Coast, outside of the traditional area of CO2 EOR in the Permian Basin, an additional 4.5 billion barrels of oil could be produced by using miscible CO2. At $60 per barrel, this incremental production is estimated to have a wellhead value of $270 billion that could generate more than $40 billion in taxes.