A wireless retrofit solution for replacing permanent downhole gauges ///

The North Sea’s Troll field, 80 km northwest of Bergen, is Norway’s largest gas reservoir. The field has been onstream since 1996, and production is expected to continue for many decades. However, declining pressure means surface compression is required to drive production, and an accurate understanding of reservoir pressure and decline is critical for meeting contractual gas deliveries and recovery targets. As an alternative option to retrofit permanent downhole gauges, the operator, Statoil, was seeking intervention-based solutions to enable data collection, if permanent gauges were not available.

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