In an exploration borehole of 500 m depth at Szentendre detailed geothermal measurements were made for the determination of the terrestrial heat flow. The hole crossed porous Oligocene sandstone containing clay minerals. 40 rock samples were collected but the cores lost a considerable part of their pore-water while taking ont of the borehole and transporting into the laboratory. Resaturation was not possible owing to desintegration of the samples due to swelling of clay minerals.
The author presents a method for overcoming this difficulty. It there exist a suitable model of pore distribution, the approximatein situ conductivity can be established. At first the rock specimen is completely dired out and the dry conductivity is measured. Then the specimen is saturated with some organic liquid or mineral oil with known conductivity and the conductivity is measured again. From these two values and from the conductivities of the air and liquid, with help of the pore structure model, thein situ conductivity can be approximated.
After comparing his results to other investigators experiments, the heat flow is computed using the method described for the determination of thein situ conductivity. The heat flow amounts to
which is consistent to other results in the Hungarian basin.
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T. Boldizsár,Measurement of Terrestrial Heat Flow in the Coal Mining District of Komló, Acta Techn. Acad. Sci. Hung.15 (1956), 219.
T. Boldizsár,Terrestrial heat flow in the Nagylengyel oil field, Publ. Min. Fac.XX (1959), 27.
W. H. Diment andE. C. Robertson Temperature, thermal conductivity and heat flow in a drilled hole near Oak Ridge, Tennessee, J. Geophys. Res.68 (1963), 5035.
Gy. Wein,Über die geologischen Verhältnisse der Umgebung von Szentendre, Földtani Közlöny69 (1939), 1.
W. Woodside andJ. H. Messmer,Thermal conductivity of porous media, J. Appl. Phys.32 (1961), 1688.
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Boldizsár, T. Heat flow in oligocene sediments at Szentendre. PAGEOPH 61, 127–138 (1965). https://doi.org/10.1007/BF00875769
- Heat Flow
- Clay Mineral
- Rock Sample