Converting a drilled well to a condition that can be left indefinitely without further attention and will not damage freshwater supplies, potential petroleum reservoirs or the environment.

A well that is currently producing oil or natural gas.

A measure of the relative density of a petroleum liquid. If one petroleum liquid floats on another it has a greater API gravity.

Equipment to process or store crude oil from one or more wells.

Data and information used as a point of reference against which industry performance is measured.

A light aromatic hydrocarbon, which occurs naturally as a part of oil and natural gas activity. It's considered to be a non-threshold carcinogen and is an occupational and public health concern.

Petroleum in semi-solid or solid forms.

The process of taking waste carbon dioxide and transporting it to a storage site, normally underground in a specific type of geological formation.

A rotating pump, commonly used for large-volume oil and natural gas pipelines, that takes in fluids near the centre and accelerates them as they move to the outlet on the outer rim.

Natural gas generated and trapped in coal seams.