The Development of a Dual Containerised Source System
T. Hibben, M.J. Burnett · Proceedings · 2015
Summary For Statoil’s Snorre & Grane PRM project, WGP has developed and operates a dual containerised source system (otherwise known as a Dual-Portable Modular Source System, D-PMSS). The equipment has been utilised to acquire baseline surveys over Grane (2014), and baseline plus repeat surveys over Snorre (2013, 2014). The equipment is installed on the Statoil supplied vessel “Siddis Sailor” for the duration of each survey program only. This is the fourth generation containerised source system that WGP has developed, with a number of notable improvements: Dual Source capability: Towing 2 × 3,250cu.in. sources at 50m separation. Naturally, this provides increased source effort productivity, relative to single source operations. The main challenges that were overcome involved developing a modular handling system for the deployment, towing and recovery of the barovanes to achieve the source separations. This was a necessity due to the extent of the trenched seabed cable array, combined with the required offset and resultant source area,and requirement to acquire 2 surveys over each field per year. Improvement of realtime and post-acquisition QC of the source array. By inclusion of a fully distributed source controller, with: Depth Transducer and Pressure Transducer (with fill)at each element and Near Field Hydrophones at each cluster.