This is a log of measurements along a well bore (a well-log). You could have found the code POR_NET in your log evaluation software or your corporate datastores. Net Porosity is the offical name for this log. This log is very common in the industry.

This log displays readings of 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 from this log can be used to investigate the porosity of the formation. Similar logs are listed below:

• Crossplot Porosity from PORD and CNC (CPP)
• High Resolution Density Porosity (HDPO)
• Effective Porosity from HILT Lithology Computation (PHIE_HILT)
• High-resolution Classic Neutron Porosity (HNPH)
• Conductivity derived porosity from RD (CDPL)
• High Resolution Thermal Neutron Porosity (Ratio Method) in Selected Lithology (HTNP)
• Density Porosity (DPO)
• Neutron Borehole Invariant Porosity (BNPH)
• APS Corrected Standoff Porosity (STPC)
• Density Porosity Dolomite, Transmitted (DPDX)