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Petroleum Geology Acronyms

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Neutron Borehole Invariant Porosity, Real-Time (BNPH_RT)

This is an acronym for a well log used in the oil and gas industry. You could find this abbreviation BNPH_RT in your log evaluation software or any (ASCII) log files provided by the logging company. The official name for this log is 'Neutron Borehole Invariant Porosity, Real-Time'. This log is not used too often in the industry.

This log can be used to evaluate the porosity as measured with an neutron logging device.

Furthermore, this can be explained by looking at the apparent porosity. This can be explained as being 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. At a more general level these values are measures of 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 neutron logging technique and can be used to investigate the porosity of the formation. Similar logs are listed below:

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