Case Study No 3 – Pre-Development: Waveney Gas Field – UK Southern North Sea
The Waveney Field lies within UK block 48/17c in the Southern Gas Basin, approximately 46 km north-east of the Norfolk coast line and to the west of the Mobil’s Lancelot and Guinevere Fields. The water depth is approximately 25 meters. The field was discovered in 1996 and brought on production in 1998 following a 14-month fast track development program and the drilling of two 2500 ft horizontal wells. The original reserves were 84 bcf and the reservoir predominantly comprises aeolian dune sandstones of the Upper Permian Rotliegend with an average reservoir quality range of 7-10% porosity and 0.1-200mD permeability.
ACG’s Tore Vartdal was the Senior Facilities Engineer in the pre-development team working for ARCO British Ltd and was involved in preparing the development plan that was approved by the UK’s Department of Trade and Industry (DTI). Following the gas discovery, Tore worked closely with geologists and reservoir engineers to optimize the topside facilities to maximize reservoir recovery and minimize development cost. This included developing and running economic models, process simulations, blending calculations, developing the Basis of Design and submitting the development for internal approval (AFE). The Waveney Development was a fast track development and achieved very high IPA rating.