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IRM survey - Bacton to Sean field export pipeline (PL311) and inter-field and platform locations
Extension of period for the IRM / Sean Platforms survey. The Sean IRM survey will be surveyed using MBES, TSS pipe tracker and video survey. It will cover:- Bacton to Sean Papa export pipeline (PL311), Sean Romeo to Papa inter-field Pipeline (PL310) and areas around the Sean Papa and Sean Romeo platforms. It will be performed by survey vessel Deep Vision.
The Sean export pipeline (PL311) will be surveyed using MBES, TSS pipe tracker and video survey performed by survey vessel Deep Vision. The vessel will mobilise to the UK pipeline location at adjacent to Bacton first and and survey KP0 to KP107 of the PL31. The vessel will then mobilise to Sean Romeo and Sean Papa (block 49/25a), to complete the seabed and debris survey (and potential debris removal), and survey the Sean Romeo to Papa pipeline. The vessel is in field currently. Due to inclement weather this survey is not now expected to be completed until 17th November 2025.
See detailed map on our bulletin website
DSV Activity - Thistle Platform
DSV 7 Atlantic will be on location at Thistle for an extended period conducting decommissioning operations.
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Pre-Rig arrival survey of South Magnus and Swift wells by the Fugro Merdian
Pre-Rig arrival survey of South Magnus and Swift wells by the Fugro Merdian
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Pre-decommissioning activities - Amethyst A2D
The MSV Kingsborg will attend the Amethyst A2D for pre-decommissioning activities from 28th October 2025 at the earliest to 11th November 2025 at the latest.
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Decommissioning - Amethyst A2D
The OBANA Heavy Lift Vessel will undertake jacket removal works at Amethyst A2D. Works will be between 13th November 2025 and 15th December 2025.
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Subsea structure with missing roof panels - PL873 "PDF" tee structure
PL873 "PDF" tee structure - roof panel not present.
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Combined Belinda and Bittern Project in the DANA Triton Area
DANA will have the Subsea 7 DSV Seven Atlantic in the Triton area carrying out diving operations from mid-October 2025 for 45 days. Operations are within the following 500m areas of the Triton FPSO, Evelyn, Belinda and Bittern DCB manifold.
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Subsea Decommissioning - Western Isles Locations
Dana Petroleum (E&P) Limited has contracted Boskalis Subsea Services (BSS) for the Western Isles decommissioning project using the CSV Boka Northern Ocean.
Harris and Barra fields are located in Block 201/24a of the UKCS, 160km to the East of Shetland, and apprcximately 500km North-North East of Aberdeen. The water depth in the area varies from approximately 150m to 165m. The Western Isles production storage and offshore vessel (FPSO) has been disconnected and offstation, but production trees and water injections trees via 9-off flexible risers, 2 -off dynamic umbilical's, 2 -off bundle systems with associated spools and jumpers, 2- off mid-water arches (MWA), FPSO mooring piles, concrete mattressess remain on location. Boka Northern Ocean will carryout some of the decommissioning works commencising in early April for up to 90 days on location, note only ROV's operations from the CSV Boka Northern Ocean for this part of the project.
See detailed map on our bulletin website
Infill Drilling - Cygnus Field
The Valaris Norway is adjacent to the Cygnus Alpha, operating within the 500m zone. Anchors may extend beyond this point. *Please note that there is a slight delay between Cygnus A and Valaris Norway navigational aid activation, following assessment a dispensation has been approved under CL/63/8*
The Valaris Norway is adjacent to the Cygnus Alpha, operating within the 500m zone. Anchors may extend beyond this point.
*Please note that there is a slight delay between Cygnus A and Valaris Norway navigational aid activation, following assessment a dispensation has been approved under CL/63/8*
See detailed map on our bulletin website
Southwark - Platform Loss of Power
Main Power generators have failed. Platform May be unmarked and unlit. Guard Vessel on station from 09 November
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Decommissioning - Amethyst C1D
The OBANA Heavy Lift Vessel will undertake jacket removal activities at the Amethyst C1D installation. Works will be between 17th September 2025 and 17th November 2025.
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E&A well abandonment campaign - Trent, Leman, Hoton, Bedevere
Dismantling infrastructure on 4 Exploration & Appraisal wells to achieve Abandonment Phase 3 status.
The vessel is the Royal Wagenborg MSV Kingsborg. The schedule is from 12th November to 12th December.
See detailed map on our bulletin website
Decommissioning - Pickerill A
The OBANA Heavy Lift Vessel will undertake jacket removal activities at the Pickerill A installation. Works will be between 11th January 2026 to 1st February 2026.
The OBANA Heavy Lift Vessel will undertake jacket removal activities at the Pickerill A installation. Works will be between 15th December 2025 and 5th January 2026.
See detailed map on our bulletin website
Offshore ROV UXO & Crossing Investigation - Southern North Sea
Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking an offshore Unexploded Ordinance (UXO) Investigation survey within the southern North Sea. The survey will be conducted by the vessel 4-Winds, with mobilisation expected to commence on the 15th October 2025.
The survey will carry out targeted investigations of possible UXO targets and crossings utilising an ROV (Remote-Operated Vehicles) from >10m water depth within Block 1 to Block 5 (See Figure 1 and Table 1 in attached PDF)
The vessel is estimated to arrive on location on the15th October, and the survey is expected to take ~ 16 days to complete (weather dependant) Updated 24-hour and 7-day lookahead positions of the 4-Winds will be provided throughout the survey period.
Mariners are advised to maintain a safe distance (of at least 500m) from the survey vessel locations at all times.
For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officer are provided in Section 7 of the attcahed PDF.
See detailed map on our bulletin website
Pipeline Inspections with Remotely Operated Vehicle (ROV)
Conducting Visual Pipeline Inspections of existing pipelines with a vessel equipped with a remotely operated vehicle.
The vessel will sail along the pipelines and conduct visual inspections by means of using a remotely operated vehicle (ROV).
See detailed map on our bulletin website
Decommissioning - Trent
The ERDA Jack-Up Barge will undertake hydrocarbon safe, pipeline flushing and well plug and abandonment works at the Trent installation. The ERDA will be located within the 500m exclusion zone. The ERDA will be at Trent from 24th September 2025 to 23rd December 2025.
The ERDA Jack-Up Barge will undertake hydrocarbon safe, pipeline flushing and well plug and abandonment works at the Trent installation. The ERDA will be located within the 500m exclusion zone. The ERDA will be at Trent from 24th September 2025 to 23rd December 2025.
See detailed map on our bulletin website
Jackdaw Development - North Sea
The Jackdaw field is an ultra-high pressure/high temperature (uHPHT) reservoir that will be developed with a not permanently attended Wellhead Platform (WHP). Four wells will be drilled at the Jackdaw WHP. The export system consists of a subsea pipeline to the Shearwater platform. Vessels for 2025/2026: Deep Arctic or Deep Discoverer, Sleipnir, Seven Kestrel .
Continuation of Jackdaw Installation 2025/2026
New SSIV, tie-in spools and associated protection will be installed in the Jackdaw 500m zone between the Jackdaw Wellhead Platform and the new pipeline which was installed in 2024.
Sleipnir with associated barge and tugs working in and around the Jackdaw 500m safety zone.
New electro-hydraulic umbilical and associated protection will be installed between Jackdaw Wellhead Platform and New Jackdaw SSIV. Cooling Loop may be cleaned if required.
Sat 1st of November 2025 - The Deep Arctic vessel will carry out 4 hours of DP trials.
See detailed map on our bulletin website
Wellhead Protection Structure - Abbey A02
32 ton fishing friendly wellhead protection structure, protruding approximately 6m above the sea bed with a 7m square footprint, protecting the Abbey A02 Wellhead.
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Marine Survey - Blane field
A GVI and hydrographics survey around the Blane field subsea 500 m zone expected to commence and be completed during Nov 2025 using M/S Olympic Ares
A subsea facilities inspection and hydrographics survey of the Blane infrastructure in the UKCS, to include the collection of ROV visual inspection and CP stabs of facilities and side-scan sonar (SSS) and multibeam echo-sounder (MBES) data collected across the area of the subsea 500 m zone. At its closest point, the proposed survey area is located approximately 264 kilometres (km) east of Peterhead on the Scottish coastline. The closest Blane subsea infrastructure to the UK/Norwegian median line is the Blane Production Tree PE wellhead located 0.2 km to the west. As such, the survey vessel may manoeuvre into Norwegian waters. The spatial extent of the survey area (including the greater working area) is 2.56 km2.
The survey will be conduced using the M/S Olympic Ares operated by Deep Ocean. The anticipated earliest start date for the proposed survey operations is the 31st October 2025, with operations expected to take approximately 6 days to be completed, excluding weather downtime. The latest completion date for the survey is the 30th November 2025, allowing for a delay to the start date.
See detailed map on our bulletin website
Buoy - Pierce Area #2
Yellow surface float with a diameter of 1 metre.
WGS84: 57° 09' 09.792''N, 002° 15' 28.554'' E
Clump weight: 500 kg steel ballast with mooring line attached
Deployment date: 02/10/2025
See detailed map on our bulletin website
Rig - Deepsea Bollsta
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Decommissioning - Amethyst B1D
The OBANA Heavy Lift Vessel will undertake jacket removal works at Amethyst B1D. Works will be between 1st December 2025 and 31st December 2025.
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Simplification & Reactivation - Davy Platform
The HAVEA Jack-Up Barge will undertake a combined simplification and well plug and abandonment campaign at the Davy installation. The HAEVA will be located within the 500m exclusion zone. The HAEVA will be at the Davy platform from 9th October 2025 to 10th January 2026.
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Rig - Paul B Loyd Junior
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Valaris 72
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Seafox 4
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Transocean Norge
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig Move - COSL Pioneer
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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DEME Innovation Heavy Lift Vessel removing topsides & jacket of the Boulton BM & Munro MH platforms
Harbour Energy will completely remove and recover the topsides and jacket (including risers) of the Boulton BM and Munro MH platforms using the DEME Innovation Heavy Lift Vessel. The vessel will mobilise between the 21st October – 28th October 2025 for approximately 25 days. The DEME Rollingstone fallpipe vessel will perform rock placement at Munro MH to facilitate the DEME Innovation Heavy Lift Vessel scope of work. The vessel will mobilise between 23rd – 30th October for approximately 5 days.
Harbour Energy will completely remove and recover the topsides and jacket (including risers) of the Boulton BM and Munro MH platforms using the DEME Innovation Heavy Lift Vessel, which will return the sections of platform to shore for dismantlement and recycling. The vessel will mobilise between the 21st October – 28th October 2025 for approximately 25 days.
The DEME Rollingstone fallpipe vessel will perform rock placement at Munro MH to facilitate the DEME Innovation Heavy Lift Vessel scope of work. The vessel will mobilise between 23rd – 30th October for approximately 5 days.
See detailed map on our bulletin website
Foinaven Buoyant Risers within Water Column
Subsea Risers which left in the water column at Foinaven following the removal of the FPSO. These buoyant risers are now covered by 3 new 500m safety zones but do still pose a significant snagging hazard due to their size, number (13x) and height above seabed (160m at highest point). There is no surface infrastructure in the area hence this notification to supplement the 500m zones
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Environmental Survey - Don
Environmental and Geophysical survey operations carried out by the vessel A78-06, on behalf of bp, shall commence approximately 5th of November. Survey operations are expected to last a duration of 7 days subject to any delay due to adverse weather.
A78-06 shall be conducting ROV based geophysical surveys at approximately 1.5 knots using multibeam echosounder and sidescan sonar. The survey shall also comprise an environmental survey, of up to 12 stations. At each station the vessel shall complete ROV video transects and grab samples
Throughout the duration of the survey, the vessel shall have restricted ability to manoeuvre.
See detailed map on our bulletin website
Environmental Survey - Miller
Environmental and Geophysical survey operations carried out by the vessel A78-06, on behalf of bp, shall commence approximately 5th of November. Survey operations are expected to last a duration of 7 days subject to any delay due to adverse weather.
A78-06 shall be conducting an environmental survey in the Don Field. The survey shall comprise:
- ROV based geophysical surveys at approximately 1.5 knots using multibeam echosounder and sidescan sonar. This survey shall cover the former 500m zone and pipeline corridor between Don and Thistle.
- Environmental survey, of up to 24 stations. At each station the vessel shall complete ROV video transects and grab samples.
- ROV general visual inspection at the former Don Platform location.
Throughout the duration of the survey, the vessel shall have restricted ability to manoeuvre.
See detailed map on our bulletin website
Plug and Abandonment Operations - Otter Wells
Noble Patriot to complete plug and abandonment operations at the Otter wells. Positioned with 8 x anchors within the radius of 61 30 52.206 North 00 57 4.215 East. Consent to Locate permit reference number: WIA/1727 CL/1556.
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Weather Buoy Installation – Rosebank Offshore Development Area
A tethered meteorological weather buoy will be installed at the given coordinates. Vessels are requested to keep safe distance.
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Marine Installation Operations – Rosebank Development Area
Multiple vessels will be carrying out pipeline and subsea structure installation activities within the charted Rosebank Development Area. Other vessels are requested to keep safe distance.
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Gas Export Pipeline - Rosebank Development
Multiple vessels will be carrying out ROV survey, boulder clearance, pipelay, trenching and pipe burying operations along the Rosebank Development pipeline route between the charted Rosebank Development Area and the WOSPS Tie-in Safety Zone. Other vessels are requested to keep safe distance.
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NEP Endurance Area - Passive Acoustic Monitoring (PAM) Survey
Mariners are hereby advised that the Northern Endurance Partnership (NEP) will be undertaking an Offshore Passive Acoustic Monitoring (PAM) Survey within the southern North Sea. This survey involves the deployment of a series of PAM moorings to support ongoing environmental monitoring activities for ~ 12 months.
NtM Information Update – 29/09/2025
Deployment has successfully carried out by the vessel BB Ocean, the vessel has returned to port to de-mobilise.
The PAM survey consists of the placement of 12 PAM recording stations at fixed locations (via moorings anchored to seabed). All moorings will remain in place throughout the 12-month monitoring period.
Equipment details are as follows:
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1 x ASCR Array: 7 x moorings deployed in a closely spaced configuration (~50 m separation between ARUs)
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2 x Localisation Arrays: 2 x seabed landers, within the ASCR array
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3 x Standalone Devices: 3 x moorings, distributed across the survey area for wider spatial coverage
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4 x cardinal marker buoys
As-laid coordinates are provided in Table 1 and are illustrated in Figures 1, 2 and 3 below. Fishing vessel plotter compatible files are also included as attachments along with this notice. Mariners are advised to maintain a safe distance from the deployment locations at all times.
For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officer are provided in Section 7 of the attached notice.
See detailed map on our bulletin website
Rig - COSL Innovator
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Deepsea Stavanger
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Swift 10
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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All Asset Inspection Campaign - Northern North Sea
The Vessel Armada 78 will be carrying Inspection Operations (Wells, Subsea Structures & Pipelines) in the vicinity of and between the locations noted below: UPDATE - MOB DELAYED Dates Now = 18th September to 27th November 2025 (Approx 70 Days)
The Vessel Armada 78 will be carrying Inspection Operations (Wells, Subsea Structures & Pipelines) in the vicinity of and between the locations noted below:
UPDATE - MOB DELAYED Dates Now = 18th September to 27th November 2025 (Approx 70 Days))
See detailed map on our bulletin website
Rig - Askeladden
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Noble Intrepid
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Linus
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Danger - Protruding Isolation Plugs on End of Live Pipeline - Galahad
Following the removal of the Galahad monopod structure Perenco UK is warning mariners of protruding isolation plugs on pipeline PL1166, which is connected to the live/operational Lancelot Area Production System. An Isolated Danger Marker Buoy has been installed at the site of the former Galahad structure to mark this hazard.
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Nelson Platform Derrick & Substructure Removal Operations
Derrick & Substructure Removal Operations. Removal operations in advance of platform decommissioning.
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Span Section of PL1762
3 span on PL1762 in the Yell Sound was identified during a recent survey. The spans have been noted to be a potential trawl risk.
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Geophysical, environmental & geotechnical survey - Platypus field and Neptune Installation
Geophysical, environmental, and geotechnical survey between the Platypus field and Neptune Installation.
Perenco will conduct a geophysical (SBP, MAG,SSS, MBES and ROV), environmental (Grab samples and ROV) and geotechnical (VPT, CPT and borehole) survey at the proposed Platypus plarea, pipeline route and Neptune to gather information on the environmental conditions.
See detailed map on our bulletin website
Solan platform has commissioned a Solar Navaid system
The Solan platform has commissioned a Solar Navaid system which is monitored by Trinity House.
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Shelf Drilling Fortress move to Teal West
This is to communicate the upcoming planned rig move of the Shelf Drilling Fortress. The rig will be relocated from Queens dock Invergordon to Teal West well (block 21/24d) to carry out drilling and completions operations. The rig is scheduled to depart Invergordon on the 8th of September 2025 and arrive in the Teal field on the 10th September 2025. The rig is expected to be on location for approximately 100 days.
Coordinates:
Starting Point
1 Pilot station 57° 39.6'N 003° 53.4' W
Way Points
2 57° 46.6' N 003° 28.7' W
3 57° 43.7' N 001° 56.5' W
Final Location
4 Teal West 57°16’ 31’’N 00°46’ 28.76’’E
See detailed map on our bulletin website
Metocean Buoy Installed - Penguins Area
A yellow spherical wave buoy with a diameter of 0.9 meters was installed in the Penguins Field. The buoy has a clump weight of 500kg (steel ballast with chain) and has a radius cone of 300m. LED light: 5 flashes in 10 s 20 s repetition 360° around for 4 Nm distance
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Noble Innovator - Mungo
Please be advised that the Jack-up rig 'Noble Innovator' is alongside the Mungo Platform, and will remain in this position for the foreseeable.
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Unknown Obstruction - Chestnut Field Well 16y 500m safety zone
During a recent survey an unknown obstruction was encountered at 57°56.915’N, 001°12.575’E. The vessel’s creeper was snagged on a heavy weight and lost in approximately this position. A 0.1nm exclusion zone around this was maintained during the trawl sweep operations - fishermen are recommended to keep clear.
The MV “Fruitful Harvest” PD50 has carried out a post decommissioning trawl verification sweep of the Chestnut Field concerning the locations noted below. In this area the seabed is fairly static and mostly sand and shells, in a water depth of 100-129 metres. Using best endeavours and practice available, we can confirm that at the time of these trials the majority of the swept areas were found to be safe for normal fishing operations – except the areas highlighted in the notes below.
| Location |
Central Position Coordinates (WGS84) |
Comments |
| Hummingbird FPSO 500m safety zone |
57° 58.522’N 001° 14.260’E | NOTE 1: At position 57° 58.500’N, 001° 14.300’E the vessel encountered a small reduction in speed and gear spread, no damage to gear was reported. NOTE 2: At position 57° 58.000’N, 001° 15.100’E the vessel encountered a small reduction in speed and gear spread while crossing over Anchor 7 and 8, no damage to gear was reported. |
| WI Well 22-2a-12 500m safety zone |
57° 57.281’N 001° 13.646’E | NOTE 3: At position 57° 57.300’N, 001° 13.600’E the vessel encountered a small reduction in speed and gear spread, no damage to gear was reported. |
| PL2422 | 57° 58.140’N 001° 14.052’E | NOTE 4: At position 57° 58.200’N, 001° 14.300’E the vessel encountered a small reduction in speed and gear spread while crossing the pipeline, no damage to gear was reported. |
| Well 16y 500m safety zone |
57° 56.997’N 001° 12.828’E |
NOTE 5: An unknown obstruction was encountered at 57° 56.915’N, 001° 12.575’E. The vessel’s creeper was snagged on |
Fishing vessels operating in the vicinity should do so with caution in the areas noted above.
See detailed map on our bulletin website
Metocean Buoy Installed - Pierce Area #1
A yellow spherical anchored wave buoy
Clump weight: 500 kg steel ballast with chain
Deployment date: 26/08/2025
Radius cone: ~120m
Model: Datawell DWR Mk3 buoy
Diameter: 0.9 m
Colour: yellow
LED light: 5 flashes in 10 s 20 s repetition 360° around for 4 Nm distance
See detailed map on our bulletin website
Rig Move Update – Dolphin PBLJ
This is an update regarding the upcoming rig move for the Dolphin PBLJ. The rig will be relocated from the shipyard in Olen, Norway to the Caledonia 16/26-30Y Well to carry out P&A operations. The original submission dated 28th May indicated the Joanne Field as the destination; however, this has now been revised. The rig move is scheduled to commence on 1st September.
This is an update regarding the upcoming rig move for the Dolphin PBLJ. The rig will be relocated from the shipyard in Olen, Norway to the Caledonia 16/26-30Y Well to carry out P&A operations. The original submission dated 28th May indicated the Joanne Field as the destination; however, this has now been revised. The rig move is scheduled to commence on 1st September.
See detailed map on our bulletin website
Rig - Ensco 92
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - COSL Promoter
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Deepsea Yantai
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Well Safe Protector
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Noble Integrator
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Deepsea Aberdeen
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Deepsea Atlantic
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Deepsea Nordkapp
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Noble Invincible
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Installation of Mattresses (part 2) - Atlantic & Cromarty
During a survey of the Decommissioning planning we have identified the presence of 49 concrete mattresses installed along the Cromarty pipeline. These mattresses are not located in 500m zones and were installed in 2003. The locations of the matt's are identified in the co-ordinates below, noting there are multiple matt's at some locations hence why there are 15 locations and 49 mattresses.
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Pipeline and Umbilical Installation (Subsea) - Belinda
Installation of oil production flowline, gas lift pipeline and service umbilical.
An 8 inch oil production flowline will be installed (trenched and buired) from the exisiting GEEBB manifold (at Triton FPSO) to the new Belinda Valve skid located approx 5km south east of Triton. A 3 inch gas pipelines (piggy backed with the 8 inch) will also be was installed the same trence.
A servise umbilical will be installed from the existing Evelyn valve skid to the Belinda valve skid located 7km north east of Evelyn.
See detailed map on our bulletin website
Bittern WI Pipeline replacement and tie in spool works - North Sea
Notification of commencement of Bittern WI Pipeline replacement and tie in spool works as per the condition of the Consent to Locate permit.
The works shall comprise the installtion of the following subsea pipeline or cable, or system of subsewa pipelines and cables:
- Bittern WI pipeline replacment and tie in spool
Dana intend to reinstate water injection at the Bittern field through installation of a new 12” water injection pipeline between the Triton FPSO and Bittern WA and WB XTs. The pipeline will be deployed by way of a pipelay vessel and laid on the seabed. The pipeline will subsequently be trenched and buried using a jet trencher. The pipeline will be accompanied by a number of jumpers and spools to tie-in to the water injection system. Rock placement, grout bags and mattresses may be required over the length of the pipeline.
As part of the system, they intend to install a 33.3 m tie-in spool connecting the new water injection pipeline (PL6609) to the WB XT. A combination of grout bags and concrete mattresses will be used to protect the pipeline.
See detailed map on our bulletin website
Bittern Valve Skid (BIVS) - North Sea
Notification of the commencement of the Bittern Valve Skid (BIVS)Works as per the condition of the Consent to Locate permit.
The Works shall be located at: 57 04' 58.69" N, 00 53' 20.47" E Block 21/30.
The structure will be loaded onto the installation vessel in Peterhead and seafastened before undertaking the short transit to the field. Upon arrival, the seabed will be prepared by the temporary installation of transponder beacons to allow accurate positioning. The ship's crane will pick up the structure and overboard it clear of any subsea assets. The vessel will then step into the desired location and lower the structure to the seabed. The ship's ROV will disconnect installation rigging and recover all transponders and a structure based gyro.
As the structure is required to be located within the FPSO swing circle, heading control will be arranged for the FPSO to maintain a safe clearance between the FPSO and construction vessel. Once installed no further navigation aids are required.
See detailed map on our bulletin website
Rig - Valaris 122
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig Move - Maersk Inspirer
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Askepott
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Noble Lloyd Noble
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - West Elara
This oil & gas drilling rig has moved to this new position. Rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Valaris 123
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Valaris Stavanger
Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending hundreds of metres outside this zone.
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Rig - Maersk Innovator
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Safe Caledonia
The semisubmersible floatel Safe Caledonia is currently located at the Captain Field, positioned on the west side of the WPP platform. The unit is secured in place using a 10-point mooring system. While the floatel itself remains well within the WPP 500-meter safety zone, the majority of its mooring lines extend significantly beyond this boundary. These mooring lines are composed of chain, fiber, and rig wire, and are supported by intermediate buoys.
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Rig - Valris 72
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Offshore Development Area - Penguins Redevelopment Project
NOTE: The Penguins Field has been granted an extension to 31/05/26. The project includes extending the life of the existing wells and addition of eight new wells. The new wells will be tied into the existing Penguins infrastructure and connected into a new FPSO. The pipeline system will be split into a North and South production pipeline, with the FPSO positioned close to the centre of the field.
UKCS Block ID: 211/13a and 211/14a
Water Depths refer to Lowest Astronomical Tide (LAT) with all depths quoted in metres.
No visible marker (marker buoys) will be deployed.
Schematic drawing has been attached.
See detailed map on our bulletin website
Irish Sea in Combined Operation with the Lennox Platform
Irish Sea Pioneer Rig Move from Hamilton to the Lennox Platform (Liverpool Bay) completed. Irish Sea Pioneer now in combined operation with the Lennox Platform
Will be in combined operations (COMOPS) for approximately 180 days supporting ctivities for CCS (Carbon Capture & Storage)
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
See detailed map on our bulletin website
Plug and Abandonment Operations - Hudson Wells
Noble Patriot to complete plug and abandonment operations at Hudson wells. Positioned within radius of 61 15 38.99' North 00 42 33.20' East 2 and 61 15 11.08' North 00 44 09.40' East.
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V120 at Judy Riser Platform
Harbour Energy are performing a drilling campaign using the V120 Jack-Up drilling at the Judy Riser Platform location in block 30/07a. The Judy installations have a dedicated Emergency Response and Rescue Vessel (ERRV) on location monitoring the surrounding area.
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Valaris V121 over Shearwater Alpha
Valaris V121 MODU jack-up rig will be situated over Shearwater Alpha platform. Valaris V121 MODU will be on location at Shearwater until June 2026.
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