Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

Application of Density Log in Coal Ash Estimation of Parvadeh-1 in Tabas

Document Type : Original Research Paper

Authors
Adel Vatandoost 1
Majid Nabi-Bidhendi 1
Gholamhosein Norouzi 2
1 Institute of Geophysics, Tehran University, Tehran, Iran
2 Mining Engineering Department, Tehran University, Tehran, Iran
Abstract
Well logging Techniques have many important applications in coal exploration, including determination of coal depth, thickness and quality. This method is of great  importance when coal quality investigation is carried out. In this paper, attempt has been made  to investigate the coal ash content in Parvadeh-1 of  Tabas region as one of the coal quality parameters. Seven boreholes from the study area have been selected and quality consideration of logs was examined after lithological interpretation. The region has a gentle topography and sequences of shale, sand, silt and coal layers were observed. Well logging was carried out  in water filled and open boreholes. Density log shows that gamma emition in coal layers increases where the ash content of the coal is reduced. In this study statistical analysis indicates a correlation coefficient of 81 percent between chemical ash and density log count rate.
Keywords
Coal
well logging
ash
density
Parvadeh
Tabas

Subjects

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Scientific Quarterly Journal of Geosciences
Volume 14, Issue 53
Autumn 2004, Vol. 14, No. 53
Autumn 2004
Pages 68-73