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| Content Provider | PubMed Central |
|---|---|
| Author | Andrew, Matthew Branko, Bijeljic Blunt, Martin |
| Copyright Year | 2015 |
| Abstract | X-ray microtomography was used to image, at a resolution of 6.6 µm, the pore-scale arrangement of residual carbon dioxide ganglia in the pore-space of a carbonate rock at pressures and temperatures representative of typical formations used for CO2 storage. Chemical equilibrium between the CO2, brine and rock phases was maintained using a high pressure high temperature reactor, replicating conditions far away from the injection site. Fluid flow was controlled using high pressure high temperature syringe pumps. To maintain representative in-situ conditions within the micro-CT scanner a carbon fiber high pressure micro-CT coreholder was used. Diffusive CO2 exchange across the confining sleeve from the pore-space of the rock to the confining fluid was prevented by surrounding the core with a triple wrap of aluminum foil. Reconstructed brine contrast was modeled using a polychromatic x-ray source, and brine composition was chosen to maximize the three phase contrast between the two fluids and the rock. Flexible flow lines were used to reduce forces on the sample during image acquisition, potentially causing unwanted sample motion, a major shortcoming in previous techniques. An internal thermocouple, placed directly adjacent to the rock core, coupled with an external flexible heating wrap and a PID controller was used to maintain a constant temperature within the flow cell. Substantial amounts of CO2 were trapped, with a residual saturation of 0.203 ± 0.013, and the sizes of larger volume ganglia obey power law distributions, consistent with percolation theory. |
| Related Links | http://dx.doi.org/10.3791/52440 |
| Starting Page | 52440 |
| File Format | |
| ISSN | 1940087X |
| e-ISSN | 1940087X |
| Journal | Journal of Visualized Experiments : JoVE |
| Issue Number | 96 |
| Language | English |
| Publisher | MyJove Corporation |
| Publisher Date | 2015-02-01 |
| Access Restriction | Open |
| Rights Holder | MyJove Corporation |
| Subject Keyword | Biochemistry, Genetics and Molecular Biology(all) Immunology and Microbiology(all) Chemical Engineering(all) Neuroscience(all) Medicine(all) Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Neuroscience Immunology and Microbiology Biochemistry, Genetics and Molecular Biology Chemical Engineering |
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