The subsea installation on Oseberg received gas from Troll that was used for pressure support. This was a success, and the technological solution received international attention.
From 1991 to 2002 an amount of 21.7 billion standard cubic metres of Troll gas were injected into Oseberg. The initially the Troll gas was estimated to increasing the Oseberg oil production by 65-125 million barrels.
From 2002 injection was continued with gas from the Oseberg field. By injecting gas and not water Oseberg has increased its total production by 400-500 million barrels.
TOGI has now been idle since 2002. In August 2012 it was removed from the Troll field. The size of the subsea installation equals half a soccer field: it is 55 metres long, 34 metres wide and 13 metres tall. It weighs around 1,500 tonnes.