CORRELATIONS AMONG THERMAL CONDUCTIVITY, POROSITY, AND PERMEABILITY OF MESOZOIC SANDSTONES AND SILTSTONES FROM THE SOUTHERN REGIONS OF THE WEST SIBERIAN PLATE
A.D. Duchkov, D.E. Ayunov, L.S. Sokolova, P.A. Yan
Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia
Keywords: Mesozoic sandstones and siltstones, thermal conductivity, humidity, porosity, permeability, correlation, West Siberian Plate
Abstract
We consider results of measurements of thermal conductivity, porosity, and permeability for 780 samples of Mesozoic sandstones and siltstones from the cores of 50 wells drilled in three southern regions of the West Siberian Plate (Novosibirsk and Tomsk regions, Surgut region of the Khanty-Mansi Autonomous Area). The thermal conductivity of the samples was measured twice: in dry and in water-saturated states. It has been established that the thermal conductivity of water-saturated rocks is on average 20-40 % higher. The thermal conductivities of dry and water-saturated samples show stable correlations between each other and with the sample porosity and permeability. These correlations can be used for the approximate estimation of the thermal conductivity of water-saturated rocks from the measured thermal conductivity of dry samples or even from the porosity values. The relationship between thermal conductivity and porosity can be used for the rapid assessment of rock porosity from the measured thermal conductivity of the core.
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