Tullow first entered the UK offshore exploration, development and production arena in 2000, when it acquired a significant number of Southern North Sea gas assets from BP. The acquisition comprised assets in the CMS and Thames-Hewett Areas. The portfolio was then expanded through a number of new licence awards and bolt-on acquisitions including transactions with Shell, Chevron-Texaco and Conoco-Phillips.
Tullow succeeded in extending the life of these mature gas assets through focused cost reduction, successful exploration and innovative developments. However the fields have now reached their end of life and decommissioning activities for the area are under way.
Development & Operations
In mid-2017 Tullow started the planning, engineering and procurement processes to decommission up to 10 operated wells in the UK Continental Shelf during 2018. Site surveys and other preparatory works will be undertaken during the first quarter of 2018, which will be followed by approximately six months of well plug and abandonment operations. The decommissioning programme for the remaining Tullow operated wells in the UK North Sea is expected to have been completed by the third quarter of 2019. Tullow will then undertake final removal and clearance activities to restore the seabed. Tullow ceased production from its non-operated UK North Sea assets during the third quarter of 2018. The decommissioning programme for these assets is expected to be completed by 2025.
Decommissioning the Thames area complex
In October 2015, DECC on behalf of the Secretary of State approved the final Decommissioning Programmes for the Horne & Wren platform, Wissey and Orwell subsea installations and the connecting pipelines and umbilicals within the Thames Area Complex, in accordance with the provisions of the Petroleum Act 1998. In 2015 the first phase of the Thames Area decommissioning was successfully completed on schedule and on budget. In March 2017 the second phase of the Horne & Wren decommissioning project was completed with the successful removal of the unmanned platform.
There are five documents listed in the related downloads section regarding our decommissioning plans.