An estimate of carbon dioxide storage capacity in the Upper Cambrian basal sandstone of the Midwest region
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2009-05-04
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Abstract
Porosity values collected from core analyses and geophysical logs from the Upper Cambrian Mount Simon Sandstone in the western part
of the Midwest Regional Carbon Sequestration Partnership (MRCSP) region indicate a predictable decrease in porosity with depth. Using this
relationship and the methodology of the Carbon Sequestration Atlas of the United States and Canada, we have estimated the potential geologic
storage capacity of CO2 in this deep saline aquifer. The storage capacity is a function of the area being assessed, the porosity and gross thickness
of the stratigraphic unit, and the CO2 storage efficiency factor, which accounts for reservoir continuity, effective porosity, and the level of certainty
of characterization. Our calculations include different scenarios for CO2 storage capacity, which is highly sensitive to changes in the subsurface
properties. The porosity and thickness of the deep saline aquifer were used to calculate net porosity feet by using the regional trend of decreasing
porosity (φ) with depth relationship (d, in feet) [φ (d) = 16.36 * e-0.00012*d; r2=0.41]. To evaluate the applicability of this relationship, we compared the
theoretical values of net porosity with those obtained from geophysical logs. This approach generates solutions of the spatial distribution of net porosity
feet that can be used to calculate storage volume potential at specific localities. The summation of these locality-specific calculations is in agreement
with the value of 86 billion metric tons of CO2 estimated by the MRCSP for the total capacity of the Mount Simon Sandstone in the region.
Description
This poster was presented at the 8th Annual Conference on Carbon Capture and Sequestration, May 4-7, 2009 Pittsburgh, Pennsylvania.
Keywords
Upper Cambrian, regional capacity, CO2 sequestration, carbon sequestration, CO2 reservoir, Indiana, Mount Simon Sandstone, Indiana Geological Survey
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Presentation