Experimental Investigation of Poroperm Properties of Geomaterials in Nonuniform Stress Field
L. A. Nazarova1, N. A. Golikov2,3, A. A. Skulkin1, L. A. Nazarov1
1Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630091 Russia
2Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
3Novosibirsk State Technical University, Novosibirsk, 630073 Russia
Keywords: Lab-scale experiment, artificial geomaterial, cylindrical specimen with center hole, diametral compression, permeability, flow rate, nonuniform stress state, inverse problem
Abstract
The research methodology for anisotropic permeability of geomaterials due to nonuniform stress state is theoretically justified and tested on a laboratory scale. The poroperm properties of fine grain sand and cryogel are investigated in diametral compression tests of cylindrical specimens with a center hole. The time-independent flow rate is measured in various areas of side surfaces of the specimens. The inverse coefficient problem on empirical permeability-effective stress relationship is formulated, and its solvability is demonstrated.
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