Unlocking the potential of Valhall
Removal of topsides, a technological world’s first and Valhall Flank West on stream. It has been an eventful year, and the modernization of Valhall has only just begun.
2019 started off with three simultaneous drilling operations on Valhall and Hod, which gave a good indication of the activity level for the year. Extensive planning and project management in the first half of the year culminated in the safe removal of QP, the original accommodation platform at Valhall. This was the first of the original structures at Valhall to be removed as part of the modernization of the Valhall field center.
Another major project this year was planning and execution of a turnaround. Inspections, upgrades and structural mainte-nance and modifications were carried out during the 34-day shutdown.
Full Wi-Fi coverage was installed at the Valhall field center in 2019 and handheld units are now used by operators to increase efficiency. New areas of use are constantly being discovered, and continuous development is done in the digi-talization process.
2019 was an important step into a new chapter of the Valhall story. We introduced new technology within well stimulation, further developed the field through Flank West and finally started the decommissioning of old facilities by removing the old quarters platform.Per Mikal Hauge
VP Valhall Operations
and Asset Development
VALHALL FLANK WEST ON STREAM
The Valhall Flank West jacket was installed on the field in May 2019 and the topsides followed the next month. The topside module was installed just 14 months after the first steel was cut at Kværner’s yard in Verdal.
Valhall Flank West is a wellhead platform that will normally be unmanned. It receives power from shore via the Valhall field centre, in line with Aker BP’s strategy of minimising its CO2 emissions from operations.
ALLIANCE STRATEGY DELIVERS RESULTS
Valhall Flank West is a benchmark for good project execution. Reorganization of the value chain through strategic partner-ships and alliances is an important part of Aker BP’s strategy. Four alliances contributed to the project and demonstrated a reduced number of engineering hours, reduced costs and reduced construction time compared with similar projects. And most importantly, the work was performed without any serious harm to people or the environment.
Production from Valhall Flank West started in December. The rest of the planned wells will be put on stream as they are completed, and work continues to further increase the value of the field.
INDUSTRY’S FIRST WITH STIMULATION METHOD
In November, Aker BP became the first company ever to suc-cessfully use a new well stimulation method offshore on the G10 well on Valhall. The Single-Trip Multi-Frac method had previously only been used onshore, and several challenges had to be solved to apply it in North Sea conditions.
While the traditional method takes two to three days to stimu-late one zone of the reservoir, Aker BP can now do two zones in a day, making only one trip down into the reservoir with the coiled tubing. This method was also successfully applied on the first well on Valhall Flank West. Single-Trip Multi-Frac significantly reduces the cost of the well because less time is needed for use of vessels and equipment.
Another method, Fishbones Stimulation Technology, was also successfully applied for the first time on Valhall. These new technologies are vital elements in the strategy to increase drainage from tight reservoirs in the Valhall area.