Publication Date:
1987-08-01
Description:
The physical processes induced in a bituminous (oil) sand by hot fluid injection consist of the transport of heat and mass and the deformation of the solids skeleton. The roles of heat conduction, convection, and the inelastic stress–strain response of sands in the evolution of stresses in a heated bituminous sand are evaluated in this paper, using the example of hot fluid injection into a vertical slit.Reservoir heating occurs by conduction and convection, whereas heat dissipation occurs mainly by conduction. The heated zone around the slit is small, but, because of stress redistribution due to localized tensile and shear failures, the zone of influence of the induced stresses can be quite large. As a result of the anisotropic temperature gradients caused by the geometry of the heated boundary, rotation of principal stresses occurs in a large area near the slit. Key words: sands, tar sands, injection, fracture, no tension, yielding, strain softening, thermal stress.
Print ISSN:
0008-3674
Electronic ISSN:
1208-6010
Topics:
Geosciences
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