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Photoelectric Factor, Up (PEU)
This is the name of a log measured along a well bore (a well-log). The acronym PEU can be found in any (ASCII) log files provided by the logging company. Photoelectric Factor, Up is the offical name for this log. This log is not often acquired after (or during) drilling a well. This log helps to evaluate the probability that scattering due the Photoelectric Effect will occur; often expressed in an approximation unit barns/electron.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 from this log can be used to investigate the photoelectric factor of the formation. Similar logs are listed below: