This is the name of a log measured along a well bore (a well-log). The acronym
TPOR is a unique identifier to recognize this particular log and can be encountered in your log evaluation software or your corporate datastores. The code stands for
'MRIL total porosity (TP + T2 bin array)'. The usage of this log is well established. Use this log to investigate the apparent formation porosity as measured with an nuclear magnetic logging device. At a more general level these values are measures of the apparent porosity. This is a measure of the initial estimate of porosity, normally from logs, not corrected for the (often large) effects of clays, gas, etc. Such estimates should only be used for qualitative interpretation of clean, gas-free intervals.
Furthermore, this can be explained by looking at the volume fraction. Better said, the ratio of the volumes occupied by two components, or by one component to the total volume of the system.This log usually has the unit
'Porosity'. This is the pore volume per unit gross volume. Porosity is determined from measurements on cores or interpreted from logs.
Data for this log is produced by a tool that uses a nmr logging technique and can be used to investigate the porosity of the formation. Similar logs are listed below: