Last updated: 24 Feb 2023, 15:19
Gauges the production of hydrocarbons (which become crude oil and gas in large underground reservoirs).
gradireland editorial advice
This describes editorially independent and impartial content, which has been written and edited by the gradireland content team. Any external contributors featuring in the article are in line with our non-advertorial policy, by which we mean that we do not promote one organisation over another.