N
- NACE – National Association of Corrosion Engineers
- NAPF – Non Aqueous Phase Fluid
- NASA – Non Active Side Arm (term used in the North Sea for kill wing valve on a Xmas tree)
- NAVIG – Navigational Log
- NB – Nominal Bore
- NDE – Non Destructive Examination
- NEUT – Neutron Log
- NFG – 'No Fucking Good' used for marking damaged equipment, not to be confused with NG being natural gas
- NFI – No Further Investment
- NFW – New Field Wildcat, Lahee classification
- NG – Natural Gas
- NGDC – National Geoscience Data Centre (United Kingdom)
- NGL – Natural Gas Liquids
- NGR – Natural Gamma Ray
- NGRC – National Geological Records Centre (United Kingdom)
- NGS – NGS Log
- NGSS – NGS Spectro Log
- NGT – NGT Log
- NGTLD – NGT LDT QL Log
- NGLQT – NGT QL Log
- NGTR – NGT Ratio Log
- NHDA – National Hydrocarbons Data Archive (United Kingdom)
- NHPV – Net Hydrocarbon Pore Volume
- NMHC – Non-Methane Hydrocarbons
- NMR – Nuclear Magnetic Resonance Log
- NMVOC – Non-Methane Volatile Organic Compounds
- NNS – Northern North Sea
- NOISL – Noise Log
- NOC – National Oil Company
- NORM – Naturally Occurring Radioactive Material
- NP – Non Producing well (as opposed to P – Producing well)
- NPD – Norwegian Petroleum Directorate
- NPS – Nominal Pipe Size (sometimes NS)
- NPSH – Net Positive Suction Head
- NPV – Net Present Value
- NRV – Non Return Valve
- NPW – New Pool Wildcat, Lahee classification
- NS – North Sea; can also refer to the North Slope Borough, Alaska, the North Slope, which includes Prudhoe Bay Oil Field (the largest US oil field), Kuparuk Oil Field, Milne Point, Lisburne, and Point McIntyre among others.
- NTHF – Non-Toxic High Flash
- NTU – Nephelometric Turbidity Unit
- NUMAR – Magnetic Resonance Image Log
Read more about this topic: List Of Oil Field Acronyms