FLARING is the controlled burning of fuel or waste gas that takes place during production and processing. Fuel or waste gas is ignited at the top of a flare stack, causing the characteristic flame associated with flaring. Some odours may be associated with flaring.
VENTING is a controlled release of unburned gases into the atmosphere, such as natural gas or other hydrocarbon vapours, water vapour, or other gases. Venting may occur during several processes including well completion and during well maintenance. Odours may be associated with venting.