«Proceedings of Gubkin University»

SPECIFIC FEATURES AND CRITERIA OF USING ROCK PHYSICS TO MODEL EFFECTIVE THERMAL CONDUCTIVITY OF CARBONATE AND TERRIGENOUS ROCKS

UDC: 550.8
DOI: -

Authors:

Keywords: effective medium theory, rock physics, thermal conductivity, fluid saturation, carbonate rock, terrigenous rock

Annotation:

Effective medium theory (EMT) in the general singular approach was used to develop a mathematical model of effective thermal conductivity of carbonate rock mostly consisting of limestone. The model was created with the use of thermal conductivity of a sample successively saturated with two fluids with contrasting thermal conductivity. The developed model was tested on experimental data of thermal conductivity of fluid-saturated samples. Air, brine and oil were used as saturating fluids. Experimental data and theoretical prediction of thermal conductivity were compared for different fluid saturations to test the applicability of the model for each sample. For instance, thermal conductivity of oil saturated sample was predicted from the data of thermal conductivity of dry and water-saturated samples. It is shown that the developed EMT-based model could be used to solve the fluid-saturation problem. A comparison with other collections of different rock types was performed. A new criterion of choosing the EMT-model was suggested.

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