AURELIAN NEGUT si MIRCEA PAUCA
Universitatea din Bucuresti
THERMAL CONDUCTIVITY DETERMINATION OF SOME ROCKS
FROM THE PANNONIAN DEPRESSION BY LABORATORY METHODS
(Abstract)
The laboratory apparatus for steady-state thermal conductivity determination
of rocks based on divided-bar principle, built in the framework of the Geophysics
Department – University of Bucharest is presented in the paper.
The results of 96 thermal conductivity measurements on rock sandstone, silty
sandstone, siltstone and limestone-dolomite type from cores taken from wells
which penetrated the sedimentary cover on different structures of the Pannonian
Depression, are analysed and discussed.
It has been concluded that for sandstones, silty sandstones and siltstones
from the Banat area (Tomnatec, Jimbolia, Sannicolau Mare) the thermal conductivity
changes in the range of 1.5 – 2.5 mcal/cm.°C.s, with an average value
of 2.14 mcal/cm.°C.s in dry state.
Also, the values of thermal conductivity for the other zones from the Pannonian
Depression are examined.
The implications of thermal conductivity knowledge for this geological zone
of particular interest for geothermal water resources evaluation are underlined
in the paper.
Key words: thermal conductivity, steady-state method, divided bar.