Page 18 - Danish Offshore Industry 2020

The shut-in’s five key elements

1. New pipelines: In 2018, six kilometres of pipeline were reservoirs and some have been plugged in about three
built in order to maintain continued gas production kilometres down.
from the southern fields while Tyra is closed. During
this period, gas produced in the southern fields will be 4. Closing of satellites: Tyra’s five satellites have been
exported to the Netherlands. closed by emptying the facilities and pipelines of hydro-
carbons and cleaning everything to prevent corrosion
2. Preparation of satellites: Tyra’s five satellites have during the shut-in.
been prepared for two years of downtime. This has in-
cluded the installation of temporary power sources while 5. Redirecting production: Using a 40-metre-deep diving
energy supply from Tyra is closed. operation, production from Tyra has been suspended
and export from the southern fields has been redirected
3. Closure of wells: The Tyra field’s wells have been to the Netherlands. This very complicated operation was
closed and secured. Two barriers have been created to performed using a specialised diving vessel and three
ensure that the reservoirs are closed during the rede- divers in a diving bell.
velopment. Some wells have been separated from the

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