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Drilling for Replenishment of Snohvit Gas

Source: www.gulfoilandgas.com 8/9/2016, Location: Europe

The Songa Enabler drilling rig has started drilling a new injection well for CO2 gas on the Snohvit field off the coast of Hammerfest. Next a production well will be drilled for replenishment of gas for Hammerfest LNG.

Snohvit is still the only LNG project in the world capturing and storing CO2 separated from the well stream in a dedicated formation offshore.

So far more than four tonnes of CO2 from Snohvit have been stored. The stored CO2 is being monitored in order to ensure that it does not mix with the main producing reservoir. A new CO2 injection well is now required.

After the new CO2 injector is installed, the rig will move on to drill the first new production well at Sn?hvit since the field came on stream in 2007. The drilling campaign is planned to last until Christmas.

The CO2 solution project was established in 2013 in order to build and install a new CO2 injection well, replacing the original injector that over time would leak CO2 into the gas reservoir on the Snohvit field.

“Hammerfest LNG needed replenishment of gas in order to maintain the high production and capacity utilisation at the plant, while ensuring sustainable CO2 storage. This project is therefore important to Statoil,” says Geir Owren, asset owner representative for the project.

In the summer of 2015 an extensive marine campaign was performed. Pipelines and a template for the CO2 project were installed and tied in to the existing subsea facility on the Snohvit field. The new subsea facility was built and installed without injuries and well within the budget of NOK 2.5 billion.

“The distance to the Barents Sea presents extra challenges with regard to mobilisation and sailing time, which requires careful planning, thorough preparations and close cooperation with the suppliers. We are pleased both with the equipment suppliers and marine operations, which resulted in successful project implementation,” says project leader Sveinung Ovretveit.

The next big development step for Hammerfest LNG is the development of the Askeladd field, which is part of the plan for development and operation of the Snohvit licence. It is expected to come on stream in 2020/2021. This development step will help ensure full utilisation of the capacity at Hammerfest LNG.

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