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- Title
Hydrology of the Forest City basin, Mid-Continent, USA: implications for CO sequestration in the St. Peter Sandstone.
- Authors
Burrows, Christopher; Appold, Martin
- Abstract
The central United States contain numerous coal-burning electric power plants that emit large amounts of CO for which a nearby suitable disposal site would be desirable. The results of a reconnaissance study reported here indicate that the St. Peter Sandstone in the Forest City basin has potential large-scale CO sequestration capacity, despite the basin's overall relatively shallow depth. A three-dimensional stratigraphic model of the basin constructed from published well logs reveals that about 59 % of the St. Peter in the basin lies below a depth of 750 m, where CO would exist in a supercritical state for increased storage efficiency. Based on a porosity of 15 % and a storage efficiency factor of 5.4 %, the St. Peter in the basin could potentially sequester upto ~830 M tonnes of CO, equating to upto 23,500 tonnes of CO per km. A three-dimensional hydrologic model coupling groundwater flow, heat transport, and salinity transport provided insights into how CO might be transported in the basin. The results show a consistent pattern of predominantly southwestward groundwater flow in the northern part of the basin and predominantly eastward flow in the southern part of the basin. Groundwater average linear velocities are known with much less confidence, but in the St. Peter are mostly under 10 m/year and lack a strong vertical component. Mineralogical analysis shows the St. Peter to be composed almost entirely of quartz, suggesting that the St. Peter would be resistant to dissolution by CO-enriched fluids and accompanying increases in porosity and permeability.
- Subjects
SAINT Peter Sandstone; COAL-fired power plants; HYDROLOGY; CARBON sequestration in forests; CARBON content of plants
- Publication
Environmental Earth Sciences, 2015, Vol 73, Issue 4, p1409
- ISSN
1866-6280
- Publication type
Article
- DOI
10.1007/s12665-014-3494-0