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Consent to conduct major modification

03 April 2009

StatoilHydro has received consent to conduct a major modification of Troll C. The consent relates to installation and use of a module on the facility.
Troll C will eventually have several wells which cannot maintain production against the pressure of the first stage separator due to declining reservoir pressure of increasing water content in the liquid stream.

Consent to conduct major modification
Consent to conduct major modification

The object of the modification is to facilitate production against a lower separator pressure by using a test separator for this purpose.

The modifications shall result in increased recovery rate from wells with a high degree of water/low reservoir pressure, accelerated production from such wells, and increased robustness in relation to reservoir instability.

The principal activities that will be carried out are the construction of a new compressor module, the loading, transport and unloading of new module (weight 438 tonnes), connection work and completion and commissioning.

Most of this work will be carried out with the facility in normal operation. Production will be shut down during the unloading operation, and parts of the production facility will be without pressure.

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