ENGLISH - Gassco

RICH GAS
NGL
Gas processing
Rich gas is separated into various fractions by
being passed through a series of tall columns.
When the gas is heated at the bottom of a
column, the lightest fraction rises to the top
and is drawn off. This process continues until
fractionation is complete. See the illustration
on page 29 for further details.
DRY GAS
Dry gas
is often called sales gas.
It consists primarily of
methane, but also contains
some ethane.
STORBRITANNIA
Surveys and exploration wells
Exploring for hydrocarbons calls for modern
computers, geological maps and geophysical
investigations. Seismic surveys use sound
waves generated by an explosion, which
travel through the rock and bounce back to
microphones. These signals are then
interpreted to map the “terrain”. Exploration
wells are drilled from rigs or ships.
NGL and condensate
Once separated and fractionated, propane,
butanes, naphtha and condensate are
transported by ship.
FRANKRIKE BELGIA
Transport network
Norwegian gas is transported through a network of pipelines totalling
7 800 kilometres in length from fields on the NCS to receiving terminals
in continental Europe and the UK.
DANMARK
NEDERLAND TYSKLAND
NORGE SVERIGE
Production and separation
Oil and gas can be produced from platforms or
advanced seabed installations. This wellstream,
which may be under high pressure and temperature,
is separated into its various components before
transport and further processing.
End users
Gas is used as a fuel and as a
feedstock for the petrochemical
industry. This yields a number of
commodities, particularly plastics.
Toothbrushes, shopping bags, bottles,
mobile phones and computers are
among the products where natural
gas is one of the most important raw
materials.
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