A new gas module on Troll B

A new gas module has been put on stream on Troll B, boosting the oil production and processing capacity on the Troll field.

Oil production from Troll enters tail production due to declining reservoir pressure, and an oil column that is getting gradually thinner after decades of technologically path-breaking drainage. The module that was recently put on stream helps maximise the production of the remaining oil from the reservoir. In a few years, Troll will only produce from the large remaining gas reserves. The production horizon for gas from Troll lasts beyond 2050.

The production is currently restricted by the gas treatment capacity on Troll B, and the new module will increase the capacity by 25 %.

Increased capacity will allow more wells to remain on stream – also when the oil wells are producing simultaneously with an increasing share of gas in the tail production phase.

Aker Solutions in Bergen has been responsible for the design and construction of the module in Egersund. Worth some NOK 400M, the contract is exercised as an option under a FEED contract (Front End Engineering Design) awarded to Aker Solutions in 2016.

After construction was completed in April this year, the module was transported offshore and lifted into position by the Saipem Ltd. heavy lift vessel. The chosen solution, consisting of an electric compressor train and new in-line gas drying technology, is an energy-efficient solution minimizing the CO2 footprint from production.

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