The thermo-hydro-mechanical behavior of the argillaceous Cobourg Limestone
| Autor: | M. Najari, A.P.S. Selvadurai |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Calcite
Paleozoic Biot number Poromechanics Dolomite 0211 other engineering and technologies Mineralogy 02 engineering and technology 010502 geochemistry & geophysics 01 natural sciences chemistry.chemical_compound Geophysics chemistry Space and Planetary Science Geochemistry and Petrology Earth and Planetary Sciences (miscellaneous) Fluid inclusions Sedimentary rock Geology 021101 geological & geomatics engineering 0105 earth and related environmental sciences Fluid pressure |
| Zdroj: | Journal of Geophysical Research: Solid Earth. 122:4157-4171 |
| ISSN: | 2169-9313 |
| DOI: | 10.1002/2016jb013744 |
| Popis: | The Cobourg Limestone is a low-permeability argillaceous rock that forms a part of the Paleozoic sedimentary sequence found in southern Ontario, Canada. The limestone has a heterogeneous fabric consisting of nodular regions of calcite and dolomite and argillaceous partings of a similar composition but with a low clay content, which gives the appearance of nominal stratifications. The thermo-hydro-mechanical (THM) behavior of the rock is of interest to the proposals for using sedimentary formations as candidate rocks for siting deep geological repositories for the storage of heat-emitting nuclear fuel waste. The paper presents the results of experiments where THM processes were initiated in an intact cylindrical sample of the Cobourg Limestone containing a central cylindrical fluid-filled cavity. Biot's classical theory of poroelasticity, extended to include thermal effects, is used to examine the THM response of the fluid cavity due to boundary heating of the cylinder. The rise and decay of thermally induced cavity fluid pressure is used to examine the applicability of the THM modeling. The experiments were conducted on cylindrical samples of the Cobourg Limestone with their axes either along or normal to the nominal planes of the argillaceous partings. |
| Databáze: | OpenAIRE |
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