Abstract

The Laggan–Tormore development was sanctioned in 2010: the two fields are produced by subsea systems, tied back to the Shetland Islands where the hydrocarbons are processed in the Shetland Gas Plant. A key aspect of the Laggan–Tormore development was the inclusion of in-line tees in the flowlines to allow future tie-ins. This paper highlights the opportunities now available for further gas developments West of Shetland and describes the efforts performed by Total and its co-venturers during the period 2010–15 in order to take advantage of the new gas infrastructure. Three exploration wells were drilled by Total and its co-venturers around the facilities during this period. The Tomintoul well turned out to be dry despite a positive amplitude v. offset (AVO) anomaly. Edradour, whilst a gas discovery, was not big enough to make an economical tie-back to the Laggan–Tormore facilities. The third exploration well Spinnaker was disappointing. All undeveloped gas resources around the facilities were evaluated and Glenlivet was clearly the most attractive. Studies demonstrated that a joint Edradour–Glenlivet development would be economical; the Field Development Plan was approved in March 2015 and the Glenlivet development drilling campaign took place during the summer of 2015. Total continues an intensive exploration programme West of Shetland on its wide acreage, hoping to bring additional projects in the future.