The Thames pipeline previously evacuated gas from the Thames area complex which was decommissioned following cessation of production in 2015. The pipeline was acquired by IOG for a nominal sum in April 2018 from the previous owners who had decommissioned the pipeline and the Thames area fields in 2015.
The Thames pipeline is a 24-inch concrete coated pipeline which runs 90-km from the Thames platform to the Bacton gas terminal on the coast of Norfolk.
In May 2018 IOG carried an extensive programme offshore and onshore at the Bacton terminal to commence the recommissioning of the pipeline to export the entire IOG portfolio of gas in the Southern North Sea from kilometre point 60, which is 7-km south of the proposed Southwark platform location.
Analysis of the three 12-metre sections retrieved from the 60-km offshore point during offshore operations in May 2018 has enabled a recalibration of the predicted internal corrosion of the pipeline. This shows the pipeline’s condition can be considered practically ‘as new’.
Inspection of the Bacton end of the pipeline is planned in Q3 2018 to inform a planned elevated pressure hydrotest which will complete pipeline integrity confirmation.
A further intelligent pig run to inform future pipeline integrity management is now not expected to be required until shortly before first gas when the pipeline will run continuously from the Southwark platform to Bacton following the addition of a 7-km 24-inch extension.