Fundamental Elements of Geologic C02 Sequestration in Saline Aquifers [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 2001.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: PDF-FILE: 5 ; SIZE: 0.2 MBYTES pages
Additional Creators:: Lawrence Livermore National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

Geologic sequestration represents a promising strategy for isolating CO₂ waste streams from the atmosphere. Successful implementation of this approach hinges on our ability to predict the relative effectiveness of subsurface CO₂ migration and sequestration as a function of key target-formation and cap-rock properties, which will enable us to identify optimal sites and evaluate their long-term isolation performance. Quantifying this functional relationship requires a modeling capability that explicitly couples multiphase flow and kinetically controlled geochemical processes. We have developed a unique computational package that meets these criteria, and used it to model CO₂ injection at Statoil's North-Sea Sleipner facility, the world's first saline-aquifer storage site. The package integrates a state-of-the-art reactive transport simulator (NUFT) with supporting geochemical software and databases (SUPCRT92). In our Sleipner study, we have quantified--for the first time--the influence of intra-aquifer shales and aquifer/cap-rock composition on migration/sequestration balance, sequestration partitioning among hydrodynamic, solubility, and mineral trapping mechanisms, and the isolation performance of shale cap rocks. Here, we review the fundamental elements of geologic CO₂ sequestration in saline aquifers as revealed from model XSH of our Sleipner study; this model, unlike CSH and DSH, does not address the complicating (yet advantageous) presence of intra-aquifer shales.

Report Numbers:

E 1.99:ucrl-jc-146929
ucrl-jc-146929

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Note:

Published through SciTech Connect.
11/19/2001.
"ucrl-jc-146929"
223rd American Chemical Society National Meeting, Orlando, FL (US), 04/07/2002--04/11/2002.
Johnson, J W; Steefel, C I; Nitao, J J.

Funding Information:

W-7405-ENG-48

View MARC record | catkey: 14136985