Other
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983gecoa..47..249b&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 47, Issue 2, pp.249-257
Other
2
Scientific paper
Solution-mineral equilibria were calculated for the aqueous phase, and X-ray diffractograms obtained for the solids, from the factorial experiment reported in Part I of this series of papers, in which a shale from the Lower Cretaceous McMurray Formation in the Athabasca oil sand deposit of Alberta, in the presence or absence of bitumen, was subjected to hydrothermal treatment with aqueous fluids of varying pH and salinity, at two different temperatures, for periods up to 92 hours. Data representing the departures from equilibrium, and normalized X-ray diffraction peak intensities, were studied by statistical analysis of variance. In addition to the dissolution of quartz, montmorillonite was formed probably through a transitional illite-montmorillonite interstratined layer structure, with the reaction being favored by high pH of the aqueous phase. The dissolution of siderite is significantly affected by time, salinity, and the interactions between pH and salinity, time and salinity, and pH, temperature and time. Despite the restrictions imposed by a laboratory investigation, the results demonstrate that mineral dissolution and transformation will be extensive during in situ recovery operations in oil sand deposits.
Boon J. A.
Hitchon Brian
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