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Petroleum Geology Acronyms

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Label Peak Coherence, Receiver Array, Shear - Monopole P&S (CHRS)

This is an abbreviation for a well log acquired after or during drilling. You might have encountered this acronym CHRS in your log evaluation software or any (ASCII) log files provided by the logging company. The acronym stands for 'Label Peak Coherence, Receiver Array, Shear - Monopole P&S'. This log is not often acquired after (or during) drilling a well.

This log can be used to evaluate the measure of waveform coherence with respect to slowness and time, computed as a function of coherent energy to total energy; also called "Semblance"

So basically this is a measure of the similarity between two or more functions; used with seismic waveforms to distinguish seismic events and to implement automatic picking schemes.

This log in unitless. Either the log measurements can not be expressed with a unit (eg. a ratio) or the unit is unknown to us.

Data for this log is produced by a tool that uses a acoustic logging technique and can be used to investigate the acoustic slowness of the formation. Similar logs are listed below:

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