Geophysical Logging In Coal Exploration

Logging through the rods has been done since 1976 when advances in tool design reduced the size of these tools. Logging open hole before that carried with it a risk of loosing an expensive tool and a radio active source down the hole. There are no problems with logging through the rods. A geophysical log provides a graphic profile of a coal seam.

Geophysical logs can be used to identify coal beds and to quantify their resources because coal has several unique physical properties including low natural radioactivity, low density, and high resistance to electrical currents; these properties contrast with those of most other rocks in the coal-bearing …

The parameters of key importance in shale gas exploration that are determinable by geophysical well logging include: organic matter content estimated from total organic carbon (TOC); mineral composition of shale rocks; porosity and pore size distribution; mechanical parameters of …

Geophysical borehole logging The role that geophysical borehole logging has to play in assisting with the identification and characterisation of the coal seams encountered in exploration boreholes has been recognised for many years (for example, Asten, 1983, Kayal, 1979, Reeves, 1971).Cited by: 55

Borehole logging is the one method which is highly utilised for both surface and underground coal mining exploration, although seismic methods (mainly high-resolution reflection, and in-seam), are also frequently applied in underground coal-mining investigations.

technology in coal exploration. The geophysical well logging techniques provide detailed records of lithological units encountered in the boreholes, thus identifying the coal seams and thickness of each horizon correlation is useful; in coal exploration or related formation, which continues to be present in section separated by large horizontal distance [2]. Geophysical well logsCited by: 2