This paper presents a novel pore-scale approach for the derivation of electrical properties of porous media. In this approach we create a digital porous medium on the basis of experimental grain-size distribution data and apply a drainage simulator based on pore-morphology analysis. Then we simulate via finite difference discretization the electrical charge flow within the two-fluid and solid pore-scale distributions, and derive the effective resistivity of the porous medium. Simulation results have been compared with resistivity data from a UK Permo-Triassic Sandstone (Sherwood S.). Agreement between measured and simulated bulk conductivities at different saturation values is excellent; this confirms the validity of the adopted approach, and its underlying assumptions.

Dalla, E., Cassiani, G., Brovelli, A., Pitea, D. (2004). Electrical conductivity of unsaturated porous media: Pore-scale model and comparison with laboratory data. GEOPHYSICAL RESEARCH LETTERS, 31(5) [10.1029/2003GL019170].

Electrical conductivity of unsaturated porous media: Pore-scale model and comparison with laboratory data

PITEA, DEMETRIO
2004

Abstract

This paper presents a novel pore-scale approach for the derivation of electrical properties of porous media. In this approach we create a digital porous medium on the basis of experimental grain-size distribution data and apply a drainage simulator based on pore-morphology analysis. Then we simulate via finite difference discretization the electrical charge flow within the two-fluid and solid pore-scale distributions, and derive the effective resistivity of the porous medium. Simulation results have been compared with resistivity data from a UK Permo-Triassic Sandstone (Sherwood S.). Agreement between measured and simulated bulk conductivities at different saturation values is excellent; this confirms the validity of the adopted approach, and its underlying assumptions.
Articolo in rivista - Articolo scientifico
pore-scale model, electrical conductivity, unsaturated porous media
English
2004
31
5
L05609
none
Dalla, E., Cassiani, G., Brovelli, A., Pitea, D. (2004). Electrical conductivity of unsaturated porous media: Pore-scale model and comparison with laboratory data. GEOPHYSICAL RESEARCH LETTERS, 31(5) [10.1029/2003GL019170].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/6112
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