Template:Refimprove Exploration logging is the process of wireline logging, geophysical logging, geotechnical logging or geological logging of a drill hole, its core, or its rock cuttings for petrophysics or petrology. The practice is usually used in the mining, mineral exploration or oil and natural gas sectors.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
Note that logging in this context does not refer to logging trees.