Natural CO2 accumulations in the western Williston Basin: A mineralogical analog for CO2 injection at the Weyburn site
Abstract
The Devonian carbonates of the Duperow Formation on the western flank of the Williston Basin in southwest Saskatchewan contain natural accumulations of CO2, and may have done so for as long as 50 million years. These carbonate sediments are characterized by a succession of carbonate cycles capped by anhydrite-rich evaporites that are thought to act as seals to fluid migration. The Weyburn CO2 injection site lies 400 km to the east in a series of Mississippian carbonates that were deposited in a similar depositional environment. That long-term isolation of natural CO2 can be accomplished within carbonate strata has motivated the investigation of the Duperow rocks as a potential natural analog for storage of anthropogenic CO2 in carbonate lithologies. For the Duperow strata to represent a legitimate analog for Midale injection and storage, the similarity in lithofacies, whole rock compositions, mineral compositions and porosity with the Midale Beds must be established. Here we compare lithofacies, whole rock compositions, mineralogy and mineral compositions from both locales. The major mineral phases at both locales are calcite, dolomite and anhydrite. In addition, accessory pyrite, fluorite, quartz and celestine (strontium sulfate) are also observed. Dawsonite, a potential CO2-trapping mineral, is not observed within the CO2-bearingmore »
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Lake Geological, Swift Current, SK (Canada)
- Petroleum Technology Research Centre, SK (Canada); Global CCS Institute, Canberra (Australia)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Schlumberger-Doll Research, Cambridge, MA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1245715
- Report Number(s):
- LLNL-JRNL-576092
Journal ID: ISSN 1750-5836
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- International Journal of Greenhouse Gas Control
- Additional Journal Information:
- Journal Volume: 16; Journal Issue: S1; Journal ID: ISSN 1750-5836
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; water–rock interaction; natural carbon dioxide accumulations; supercritical carbon dioxide; natural analog; geologic carbon sequestration; Weyburn carbon dioxide injection
Citation Formats
Ryerson, F. J., Lake, John, Whittaker, Steven, and Johnson, James W. Natural CO2 accumulations in the western Williston Basin: A mineralogical analog for CO2 injection at the Weyburn site. United States: N. p., 2013.
Web. doi:10.1016/j.ijggc.2012.12.015.
Ryerson, F. J., Lake, John, Whittaker, Steven, & Johnson, James W. Natural CO2 accumulations in the western Williston Basin: A mineralogical analog for CO2 injection at the Weyburn site. United States. https://doi.org/10.1016/j.ijggc.2012.12.015
Ryerson, F. J., Lake, John, Whittaker, Steven, and Johnson, James W. Thu .
"Natural CO2 accumulations in the western Williston Basin: A mineralogical analog for CO2 injection at the Weyburn site". United States. https://doi.org/10.1016/j.ijggc.2012.12.015. https://www.osti.gov/servlets/purl/1245715.
@article{osti_1245715,
title = {Natural CO2 accumulations in the western Williston Basin: A mineralogical analog for CO2 injection at the Weyburn site},
author = {Ryerson, F. J. and Lake, John and Whittaker, Steven and Johnson, James W.},
abstractNote = {The Devonian carbonates of the Duperow Formation on the western flank of the Williston Basin in southwest Saskatchewan contain natural accumulations of CO2, and may have done so for as long as 50 million years. These carbonate sediments are characterized by a succession of carbonate cycles capped by anhydrite-rich evaporites that are thought to act as seals to fluid migration. The Weyburn CO2 injection site lies 400 km to the east in a series of Mississippian carbonates that were deposited in a similar depositional environment. That long-term isolation of natural CO2 can be accomplished within carbonate strata has motivated the investigation of the Duperow rocks as a potential natural analog for storage of anthropogenic CO2 in carbonate lithologies. For the Duperow strata to represent a legitimate analog for Midale injection and storage, the similarity in lithofacies, whole rock compositions, mineral compositions and porosity with the Midale Beds must be established. Here we compare lithofacies, whole rock compositions, mineralogy and mineral compositions from both locales. The major mineral phases at both locales are calcite, dolomite and anhydrite. In addition, accessory pyrite, fluorite, quartz and celestine (strontium sulfate) are also observed. Dawsonite, a potential CO2-trapping mineral, is not observed within the CO2-bearing horizons of the Duperow Formation, however. The distribution of porosity in the Midale Vuggy units is similar to that of the Duperow Formation, but the Marly units of the Midale have significantly higher porosity. The Duperow Formation is topped by the Dinesmore evaporite that is rich in anhydrite, and often contains authigenic K-feldspar. The chemistry of dolomite and calcite from the two localities also overlaps. Silicate minerals are in low abundance (<3%) within the analyzed Duperow samples, with quartz and K-feldspar the only silicates observed petrographically or in X-ray diffraction patterns. The Midale Beds contain significantly higher silica/silicate concentrations (Durocher et al., 2003), but the paucity of mono- and divalent cations that can be derived from dissolution of these silicate minerals likely precludes significant carbonate mineral formation. Therefore physical and solution trapping are likely to be the primary CO2 trapping mechanisms at both sites.},
doi = {10.1016/j.ijggc.2012.12.015},
journal = {International Journal of Greenhouse Gas Control},
number = S1,
volume = 16,
place = {United States},
year = {Thu Jan 17 00:00:00 EST 2013},
month = {Thu Jan 17 00:00:00 EST 2013}
}
Web of Science
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