The effects of pressure and temperature on the permeability and porosity of selected crystalline rock samples
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The understanding of the hydromechanical behaviour of crystalline rocks with temperature and pressure is necessary for assessing the long-term performance of deep underground storage facilities. Permeability and porosity variations with pressure and temperature were investigated on predominantly granitic samples in the laboratory. The test results were also used to estimate the thermal fracturing characteristics of the samples. Permeability variation with pressure was influenced significantly by rock type, physical condition of test samples, and stress paths followed during testing; it was however, independent of temperature path. Permeability of the granitic samples decreased with increasing temperature between 25°C and 100°C, then increased rapidly to the maximum test temperature. The residual effect of temperature on the granitic samples resulted in increased porosisty and permeability. The threshold temperature of significant thermal crack initiation ranged between 80°C and 125°C for the granite. Thermal cycling, and increased presssure increased and reduced this temperature range, respectively.
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This work is available on request. You can request a copy at https://library.carleton.ca/forms/request-pdf-copy-thesis
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Copyright © 1986 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.
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- 1986
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