The Topaz gas field (RWE Dea UK SNS Limited 57.5% and operator, GDF SUEZ E&P UK Ltd 35%), is tied back subsea to the Schooner gas field platform, in which Faroe Petroleum also holds a 4.83% interest. The Topaz base case gross reserves are estimated to be around 20 bcf (1.5 bcf net to Faroe Petroleum).