The production of petroleum, including the drilling of production wells, injection, assisted recovery, treatment and storage of petroleum for transport, and loading of petroleum for transportation by ship, as well as the construction, location, operation and use of installations used for recovery.

The relationship between the volume of petroleum that can be recovered from a deposit and the volume of petroleum originally in place in the deposit.

A well used for production or injection.

The refining of crude oil is really a distillation process. The components with different boiling points are separated in a distillation tower. When heated, the oil is converted to gas, which condenses again at different temperatures to, among others, petrol, paraffin, diesel, heating oils, coke and sulphur.

Remaining, recoverable, saleable volumes of petroleum which the licensees have decided to recover and the authorities have given permission to recover.

A mixture of wet and dry gas (methane, ethane, propane, butanes, etc.).

A derrick, essential machinery and additional equipment used when drilling for oil or gas on land or from a drilling platform at sea.

A pipe that transports liquid up from the well to the production or drilling platform.

A fee payable to the Government, calculated on the basis of the volume and the value of produced petroleum, at the shipping point on the production site. The fee is demanded pursuant to  the Petroleum Act.