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Effects of in-situ conditions on relative permeability characteristics of CO2-brine systems.
- Source :
- Environmental Geology; Feb2008, Vol. 54 Issue 8, p1707-1722, 16p, 4 Charts, 10 Graphs, 2 Maps
- Publication Year :
- 2008
-
Abstract
- Carbon dioxide capture and geological storage (CCGS) is an emerging technology that is increasingly being considered for reducing greenhouse gas emissions to the atmosphere. Deep saline aquifers provide a very large capacity for CO<subscript>2</subscript> storage and, unlike hydrocarbon reservoirs and coal beds, are immediately accessible and are found in all sedimentary basins. Proper understanding of the displacement character of CO<subscript>2</subscript>-brine systems at in-situ conditions is essential in ascertaining CO<subscript>2</subscript> injectivity, migration and trapping in the pore space as a residual gas or supercritical fluid, and in assessing the suitability and safety of prospective CO<subscript>2</subscript> storage sites. Because of lack of published data, the authors conducted a program of measuring the relative permeability and other displacement characteristics of CO<subscript>2</subscript>-brine systems for sandstone, carbonate and shale formations in central Alberta in western Canada. The tested formations are representative of the in-situ characteristics of deep saline aquifers in compacted on-shore North American sedimentary basins. The results show that the capillary pressure, interfacial tension, relative permeability and other displacements characteristics of CO<subscript>2</subscript>-brine systems depend on the in-situ conditions of pressure, temperature and water salinity, and on the pore size distribution of the sedimentary rock. This paper presents a synthesis and interpretation of the results. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09430105
- Volume :
- 54
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Environmental Geology
- Publication Type :
- Academic Journal
- Accession number :
- 32118848
- Full Text :
- https://doi.org/10.1007/s00254-007-0946-9