PSA Given Equinor Consent for Use of Subsea Production System on Troll Field

Source: 6/21/2021, Location: Europe

The Petroleum Safety Authority Norway (PSA) has given Equinor consent to use the Troll Phase 3 subsea production system on the Troll field.

Use of facility
Operator: Equinor
Field: Troll

Other info:

The subsea production system involves the construction of subsea well templates, the drilling of eight production wells, laying a 36-inch pipeline and installing a new process module on the Troll A platform.


Troll is a field in the northern part of the North Sea. The water depth in the area is 300-330 metres. Troll was discovered in 1979, and the initial plan for development and operation (PDO) was approved in 1986, and updated in 1990. Production started in 1995.

A phased development was pursued for the Troll field, with Phase I recovering gas reserves in Troll Ost and Phase II focusing on the oil reserves in Troll Vest.

Troll Phase I has been developed with Troll A, which is a fixed wellhead and compression facility with a concrete substructure. Troll Phase II was developed with Troll B, a floating concrete accommodation and production facility, and Troll C, a semi-submersible accommodation and production steel facility.

Troll Phase III (gas blowdown in Troll Vest) is under development and expected to come on stream in 2021.

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