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XOCEAN SNS Decommissioning Survey 2023
Operations of remotely piloted Uncrewed Surface Vessels (USVs) are planned out of Lowestoft during March and April 2023. The vessels will be engaged in decommissioning survey activities in the South North Sea, approximately 90nm from Grimsby, and 70nm from Lowestoft.
Activity: Operations of remotely piloted Uncrewed Surface Vessels (USVs) are planned out of Lowestoft during March and April 2023. The vessels will be engaged in decommissioning survey activities in the South North Sea, approximately 90nm from Grimsby, and 70nm from Lowestoft.
Dates: Operations will take place subject to weather and other operational factors from 28th March 2023 for up to 6 weeks.
A support vessel will escort the USV from the active ports to clear water.
Although the vessel is uncrewed, it is crewed throughout the 24 hour operation, piloted remotely using 360 degree cameras and other navigational aids.
Figure 1 below indicates the operational area. The survey area boundary is indicated in Table 1 below also. In addition to the survey area, the USVs will transit from one of the named ports above to site.
See detailed map on our bulletin website
4D Survey - Gudrun
Equinor will conduct a seismic 4D survey over the Gudrun field in Norway, extending into UK sector on block P108 & P313. 2 x seismic vessels will be used, Ramform Vanguard and PGS Apollo. Ramform Vanguard will be towing a streamer spread of 900m wide and 6000m long behind. The seismic fleet will be assisted by 1 Supply vessel Thor Freyja and 1 escort vessel Sanco Sea.
The 4D seismic survey will consist of approximately 254 full fold sqkm, 56 sail lines with an average full fold line length of ~17km.
2 seismic vessels will be used:
- Ramform Vanguard (Vessel identification 9188714, call sign LANM8) and
- PGS Apollo (Vessel identification 9378228, call sign C6ZH9)
Ramform Vanguard will be towing a streamer spread of 900m wide and 6000m long behind (12x75mx6000m) towed at 20m depth and will be sailing at 4.5 to 5 knots with restricted manoeuvrability. The seismic fleet will be assisted by:
- 1 x Supply vessel Thor Freyja and
- 1 x escort vessel Sanco Sea
DHH Site Survey - (Block 27/5)
On behalf of the Licence Operator, Three60 Energy have contracted the MV Survey Vessel Geo Ocean III (call sign LXGP) which will undertake a geophysical site survey, habitat assessment and environmental baseline survey, in UKCS block 27/5 (Devil's Hole location).
Although the specific survey is 2Km x 2Km - vessel turns and towed array equipment deployment/recovery may be across the wider local area (circa 15km x 15km) of blocks 27/4, 27/10, 20/30 & 28/1.
Work is anticipated to be 3-4 days duration and take place between 31/03/23 to 31/05/23
See detailed map on our bulletin website
Diving workscope within Affleck 500m Zone - Affleck Field
NEO Energy Production UK Ltd intends to undertake subsea inspection and testing works within the Affleck 500m zone in commencing 09th April 2023 using the vessel Deep Discoverer.
The workscope comprises of a Dive Support Vessels (DSV) performing the inspection and testing of the Affleck Manifold and 2 off Production well A1 & A2. Both ROV and diver inspection activities will be performed on the manifold and wellheads with barrier testing, spoolpiece disconnection, leak testing and spoolpiece protection works also being performed.
The DSV will be positioned within the Affleck 500m Zone during these activities.
The earliest start date for operations to commence is 09th April 2023 with the operations expected to last until the end of April. The operations will be undertaken from the following vessels:
|
Operation |
Vessel |
Dates in Field |
|
Dive Support Vessel (DSV) |
Deep Discoverer |
09/04/23 – 26/04/23 |
See detailed map on our bulletin website
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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Snagging Hazard - NW Buchan Field (12 tonne anchor)
There is a 12 tonne anchor on the seabed in the following position. This is an anchor lost in 2013 or before and it should be noted this is NOT correctly charted on the current version of FishSAFE. Please exercise extreme caution in the vicinity.
Following a recent snagging incident in February 2023, it has become evident that this anchor has been incorrectly charted on the current and recent versions of FishSAFE. Please note that this is the correct position of the 12 tonne anchor lost in 2013 or before. This will be added to FishSAFE v46 to be released in the summer of 2023.
See detailed map on our bulletin website
Ocean Endeavor Rig Location
The Ocean Endeavor is drilling a development well at the Gannet F location with a 12-anchor spread. The Ocean Endeavor rig will be drilling a development well at the Gannet F location. It has a 12-anchor spread, which extend subsea up to 1.5km from rig centre. The existing pre-lay submission will be retracted once this submission is in place.
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Abandoned Well 9/13-18 removal by the MSV Well Enhancer in late March or early April 2023
Apache North Sea have contracted Helix Well Ops to remove Well 9/13-18. The vessel will be using divers / ROV's for installing lifting rigging on the Well and also explosives in the operation to remove the Well. Good communication with vessel's in the area as per the risk assessment
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Light Intervention Vessel at Beryl Nevis Central location
Apache will have the light intervention vessel "MSV Well Enhancer" working within Nevis Central 500m zone, i.e. workover on Well (S68/S70) during March 2023. MSV Well Enhacer will be set-up over and attached to Well (S68/S70) on DP, during the well workover there will be some diving operations being carried out, plus possible well abandoment operations at the end of the campaign.
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Spirit Energy Audreys Platforms and Ensign Platform Seabed and Habitat Survey
Spirit Energy has contracted the Fugro-operated Fugro Searcher survey vessel to undertake a combined geophysical and environmental site survey in the vicinity of the Audrey A (WD) (block 49/11a), Audrey B (XW) (48/15c) and Ensign (48/14a) platforms in the southern North Sea. The survey vessel is scheduled to mobilise in Great Yarmouth as soon as 18th March 2023, and to commence survey operations at the Audreys as soon as 19th March 2023. The survey is expected to take 10 days to complete.
The geophysical component of the survey (with the vessel underway) will involve the use of hull-mounted multibeam echosounder and sidescan sonar techniques, and a towed magnetometer. The environmental component of the survey (with the vessel stationary/near stationary) will involve drop-down still, and video camera techniques at the seabed.
See detailed map on our bulletin website
Drilling Operations - Valaris 123 MODU on location to drill appraisal well 42/15a-H Crosgan
The drilling operations will be carried out using the Valaris-123. The operations and move are waiting on weather and planned to commence on the 16th March 2023 and the drilling program is estimated to take 75 days in total. This will include Hammering of the conductor and a Vertical Seismic Profile (VSP).
The 42/15a – Crosgan planned appraisal well will be drilled using the Valaris-123 self elevated jack-up rig and will be towed by three tug boats, into position over the proposed well. (42 15 a) Admiralty Chart Number 2182A .
Once in position the rig will pin down its legs on the seabed. Stabilisation materials (rock) may be required to stabilise the legs. The 30" conductor will be pilled in place to a depth of run at ±70 m (230 ft) Piling of the conductor will be undertaken using a hammer and is expected to last up to 8 hours. Drilling operations at Crosgan are expected to take 75 days. Vertical Seismic Profile will be used to acquire data on the well, which will involve the use of a seismic array from the jack-up rig into the wellbore. The VSP operation is expected to take 24 hours to complete and will involve a four-gun array.
See detailed map on our bulletin website
Subsea Decommissioning - Don and Miller
Construction Support Vessels, Normand Jarstein and Edda Freya, will be carrying out decommissioning activities at the Don and Miller Fields. First campaign is scheduled to mobilise early April with work continuing through to early September
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Well-Safe Defender - Chestnut Field
The Well-Safe Defender will move from Invergordon to the Chestnut field on or around 28th March 2023 to undertake well plug and abandonment. This date is subject to change depending on weather and operational requirements.
The Well-Safe Defender will move from Invergordon to the Chestnut field on or around 28th March 2023 to undertake well plug and abandonment. This date is subject to change depending on weather and operational requirements. The rig will initially be on location at the 18/19z well and anchors will be prelayed at the 11x well location at this time.
See detailed map on our bulletin website
Decommissioning/IRM Activities - Central North Sea & Southern North Sea
The CSV Boka Southern Ocean will be completing decommissioning scopes at SNS, Balmoral, Brenda, Huntington and MacCulloch. The DSV Boka Da Vinci will be completing decommissioning activities at SNS, Balmoral, Huntington and MacCulloch, and IRM activities at Joanne, Johnston and Catcher.
The CSV Boka Southern Ocean is due to mobilise in Aberdeen on 25th May 23 to undertake a 194 day offshore campaign to execute the Central North Sea and Southern North Sea Decommissioning Scopes. The vessel will be working at SNS, Balmoral, Brenda, Huntington and MacCulloch 500m safety zones. Throughout the campaign, port calls will be completed to/from Lerwick and Blythe for the waste disposal activities. Upon completion of the offshore campaign, the vessel will demobilise in Peterhead.
The DSV Boka Da Vinci is due to mobilise in Sunderland on 3rd April 23 to undertake a 245 day offshore campaign to execute the IRM and Central North Sea and Southern North Sea Decommissioning Scopes. The vessel will be working at SNS, Joanne, Johnston, Catcher Balmoral, Huntington and MacCulloch 500m safety zones. Upon completion of the offshore campaign, the vessel will demobilise in Sunderland
See detailed map on our bulletin website
Rig - Scarabeo 8
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 Innovator
Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Transocean Barents at Benriach
The Transocean Barents rig will be moored at the Benriach location from March 2023 to September 2023. Eight (8) anchors will be deployed up to 2100m from the rig at the locations noted. Vessels are requested to stay clear of the mooring pattern with closest approach 2500m (1.35 NM) from Rig.
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HAEVA JUB at Hoton Platform
Please be advised that the HAVEA JUB is due to depart from the Neptune Installation (UKCS 47/4) on 17th March 2023 and will be interfaced with the Hoton platform for Well Intervention Work from 18th March 2023 to 31st May 2023.
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Site Surveys - Culzean WT
Deep Helder (Call Sign: PBYU) will be undertaking seabed and shallow geophysical surveys with environmental sampling in the Culzean Field. Start date: 15/03/2023 Expected duration: approx. 3 weeks (to approx. 7/4/2023)
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Brent Subsea Infrastructure Decommissioning Programme
Carrying out Subsea Decommissioning programme in the Brent Field. The Subsea Infrastructure Decommissioning project intends to conduct decommissioning scope on Brent infrastructure in 2023. This will entail decommissioning pipelines/umbilical and power cables (by various methods) and the removal of subsea infrastructure, mattresses, grout bags, and subsea debris.
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Hazard - Boulder (T22-0938) North of Fulmar
During debris recovery, a large boulder was observed by the ROV. Boulder dimension 3.0m x.1.6m x 0.6m.
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Jacky Field Decommissioning Subsea Structures
Items still on seabed prior to final decommissioning of field.
Items still on seabed prior to final decommissioning of field-
• Rock berm covering conductor stump cement patio.
• 2 x pipeline ends protected with Rock Filter Units
• 1 x Power Cable End
See detailed map on our bulletin website
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 7
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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Rig Move - 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 - Noble Resolute (ex Maersk Resolute)
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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BP-7 wellhead and Xmas tree
BP-7 is a new subsea oil well. The wellhead supports a Xmas tree and integrated "fishing friendly" wellhead protection structure. BP-7 is a new subsea oil well. The wellhead supports a Xmas tree and integrated wellhead protection structure. The wellhead protection structure has legs that penetrate the seabed and a ‘fishing friendly’ profile with sloping sides designed to deflect trawls and offer protection against dropped objects
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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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Rig - Maersk 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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Decommissioning - Gawain subsea infrastructure
The HAEVA Jackup Barge will support the decommissioning of the Gawain Subsea infrastructure.
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Topside Removal - Amethyst A2D
The ERDA Jackup Barge will come longside the Amethyst A2D and remove the topside.
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Ocean Great White rig anchoring at Ben Lawers
Please be advised that the Ocean Great White rig will be anchored at the Ben Lawers well, circa 8 nautical miles South West of the Foinaven Field, from around 8th March, using the pre-installed moorings as detailed in this notice. The rig is expected to be on location for approximately 2 months. There may be surface buoys attached to some or all of the 8 mooing lines
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Semi-Submersible Pre-Laid Anchors - Gannet Asset
Ahead of Ocean Endeavor rig move from Bergen to Gannet Asset, 12x anchors will be prelaid and pretensioned using the Aurora Sandejord vessel, scheduled to be working between Saturday 4th - Friday 10th. This will be superseded once the rig is on location.
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Marine Q1 Survey 2023 - Liverpool Bay Asset
Various Surveys by two separate vessels to support Geophysical Survey at Liverpool Bay Asset - Fugro Venturer starting on 11th March - Fugro Valkyrie (only for Lennox and export pipeline) starting approx 20th March
Scope of work includes: • Acoustic Inspection of 12 Wellheads within Liverpool Bay;` • Acoustic Survey of Platform Stand-off Locations and Wellheads; • Full bathymetric and acoustic survey of whole pipeline system (where accessible when close to the installation); • Acoustic Inspection of all pipeline assets within Liverpool Bay; • Acoustic Survey of Platform Approach Zones at 4 offshore installations within Liverpool Bay • Grab and Drop-Down Video Sampling
See detailed map on our bulletin website
Plugging & Abandonment of Wells via use of Jack-Up Vessel
Jack up vessel Valaris Norway will be towed alongside the 47/8A platform, once in location it will 'jack up' and connect to the 47/8A via a 'walk to work'. Once connected a series of works will be undertaken to enable the plugging and abandonment of the wells associated with the 47/8A
Jack up vessel Valaris Norway will be towed alongside the 47/8A platform, once in location it will 'jack up' and connect to the 47/8A via a 'walk to work'. Once connected a series of works will be undertaken to enable the plugging and abandonment of the wells associated with the 47/8A
See detailed map on our bulletin website
Drilling Rig - Noble Hans Duel
The Drilling Rig Noble Hans Duel will be located next to the Blythe Platform for approximately 100 days from February 2023. The drilling rig Noble Hans Duel is located on the south face of the Blythe Platform. It is located fully within the platform's 500m safety zone.
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Decommissioning - Victoria Field
NEO have contracted Boskalis to decommission the Victoria field subsea infrastructure using a Diving Support Vessel, DSV Boka Polaris. This vessel shall work between the Victoria tree, Victoria skid and the Viking skid.
DSV Boka Polaris will be in the Victoria field carrying out various decom activities to support the safe execution of the field decommisioning plan.
See detailed map on our bulletin website
HAEVA JUB at Neptune Platform
Please be advised that the HAVEA JUB will be interfaced with the Neptune platform for Well Intervention Work from 30th November to the 31st March 2023.
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Subsea Construction Activities - Seagull, Skua and Egret
Subsea construction activities at the Seagull, Skua and Egret locations using diving vessel DSV Deep Explorer, including tie-in of spools installation of equipment, subsea protection and leak testing. Operations planned to start in field 30th March for approximately 26 days.
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Wells Abandonment and Wellhead Severance - Platypus 48/01a 5 & 48/01a 6
Wells to be permanently abandoned and wellheads removed. Wells to have shallow environmental plugs set and wellheads severed below the mudline and recovered, followed by debris survey to ensure clean seabed.
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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 - West Phoenix
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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Unmanned Surface Vessel (USV) X-20 - Lowestoft
The USV will be mobilised from SMS Group crane, Lowestoft where it will transit to/from the area of operation. During the operation the USV will be performing a Hydrographic Survey from 25th February 2023 for up to the end of March 2023, subject to weather conditions.
A support vessel will escort the USV throughout the operations from the harbour entrance and will then continue transiting towards the survey site until the area is safe & clear of hazards. It is requested that other vessels remain clear, so far as is practicable, during transit & survey operations. Although the vessel is uncrewed, it is managed throughout the 24hour operation, piloted remotely using 360 degree cameras and other navigational aids.
Vessel Details:
- Name: X-20 UNCREWED
- MMSI: 232042736
- Length: 4.5 m
- Beam: 2.2 m
- Speed: 3.5 kts
- Draught: 1.0 m
- Tonnage: 750 kg
The USV sends real time images and situational awareness data over satellite to a team of operators keeping watch and controlling the vessel remotely 24/7.
Safety Precautions: The USV is equipped with the following to make it conspicuous to other marine traffic:
- AIS;
- Navigation Llghts & sound signal;
- Active radar reflector;
- Superstructure painted yellow. Seafarers are asked to avoid contact with the vessel and be aware of the operational area during this period.
XOCEAN - Emergency Contact Details:
Adam Roche (Project Manager) +353 87 384 5174 adam.roche@xocean.com
JP Kearns (Marine Superintendent) +353 85 207 6804 jp.kearns@xocean.com
Kevin Harnett (COO) +353 87 975 3797
James Ives (CEO) +353 87 123 5175
See detailed map on our bulletin website
Drilling Activity - Breagh A with the Noble Resilient
The Noble Resilient will attend the Breagh A platform from 27th Feb 2023 for a period of approximately 4 months in order to complete well intervention activities.
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Decommissioning - Elland Well
This is to decommission two wellhead conductors at the Elland well location using the Normand Jarstein.
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Decommissioning Activities - Trees Field Areas (Birch, Larch and Sycamore)
Helix Seawell at Trees Field Areas (Birch, Larch and Sycamore) to perform pre-decommissioning activities. Mobilisation expected to be on or around 6th March. This date is subject to change depending on operational requirements.
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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 move to Captain Field
The COSL Pioneer MODU will be drilling in the Captain field on behalf of Ithaca Energy for approximately 155 days. The drilling operations are expected to commence around 1st March 2023.
Ithaca Energy will be using the COSL Pioneer to drill EUB04i, EUC01i and EUC02i injector wells. Ithaca propose to batch drill the three wells. The drilling campaign is planned for 155 days commencing March '23, with the anchors pre-layed prior to rig arrival. The Captain platform ERRV will act as a gaurd vessel at the location from when the anchors are pre-laid until the COSL Pionner arrives on location. The Captain field lies within the UKCS block 13/22s, approximately 91km North of Aberdeen and 191km from the UK/Norway median line.
See detailed map on our bulletin website
Drilling Rig - Noble Hans Deul
The Drilling Rig Noble Hans Duel will be located next to the Blythe Platform for approximately 85 days from March 2023. The drilling rig Noble Hans Duel will be fully within the platform's 500m safety 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 - Noble Sam Turner
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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Drilling Activity - Valaris 122 at Shearwater
The Valaris 122 (jack-up drilling rig) will be conducting drilling operations at the Shearwater field on the 30/22b-SW-IWA well. The Valaris 122 will be drilling as a standalone location in the Shearwater field on a single well campaign. The total duration of drilling and suspension activities is expected to last approximately 194 days.
Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
See detailed map on our bulletin website
Rig Move - Irish Sea Pioneer
Irish Sea Pioneer Rig Move from Cammell Laird Wet Basin to the Hamilton Platform (Liverpool Bay) . Will be in combined operation for approximately 40 days supporting Maintenance, Pipe Line Pigging Operations and Well Interventions. Rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Prospector 1
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 - Maersk 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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Tolmount East Development Drilling
Scheduled drilling operations at the location are due to be concluded early Feb and the MODU Noble Innovator shall be removed from location. On conclusions of operations a statutory 500metre exclusion zone has been established. Further field development remains ongoing throughout the course of 2023, in support of tieing back the Tolmount East Well to the Tolmount Platform. All vessels are requested to maintain a wide berth and avoid deployment of static gear within ~1nm of the location.
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Rig - Transocean Spitsbergen
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 - 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 - Deepsea Yanti
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 - 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 - 590021
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 - Ocean Patriot
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 Gorilla VI
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 Endurance
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 Resolve
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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Lost core barrel - Abbey Field - Block 47/3
The core barrel of seabed sampling equipment has sheared while undertaking sampling in the Abbey field (Block 47/3) and is now sticking approximately 2.75 m out of the seabed.
Geotechnical survey activities are currently underway in the Abbey field, Block 47/3. While carrying out seabed sampling with a vibrocore, the core barrel sheared off and remains stuck in the seabed. The core barrel is a hollow cylindrical tube, with diameter of approximately 10 cm. It is estimated that the core barrel sticks out of the seabed and it is approximately 2.75 m proud of the seabed.
See detailed map on our bulletin website
Well Operations - Finlaggan F3
Drilling Operations at the Finlaggan Manifold using the Transocean Paul B Lloyd Junior (PBLJ) MODU. PFML plan to drill the Finlaggan F3 well using the PBLJ semi - submersible drilling rig with operations commencing approximately 4th February 2023. The operations are expected to be concluded by the end of May 2023
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Infill Drilling - Buzzard
CNOOC will be conducting infill drilling of 2 wells at the Buzzard North Terrance Manifold.
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Seabed Obstruction - Isabella Area
Within Block 30/12 - there is a Seabed Obstruction in the form of a “CANDuctor”, which is a 6m diameter steel cylinder protruding 2.5m from seabed. In place after rig departure on 23rd January until removal in April 2023.
Within Block 30/12 - there is a Seabed Obstruction in the form of a “CANDuctor”, which is a 6m diameter steel cylinder protruding 2.5m from seabed. In place after rig departure on 23rd January until removal in April 2023.
See detailed map on our bulletin website
Anchor on pipeline PL2104
Anchor discovered on pipeline during survey activities 17/12/2022. Approx dimensions L3.9M X W2.0m X H1.8m
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Drill collar on North Eigg well 3/24c-6
It is intended to leave the drill collar stump on the North Eigg well 3/24c-6. This will be +/- 20 ft above seabed and is 8” outer diameter. Well 3/24c-6 is located 40 m South of the 3/24c-6B well.
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Rig Move - Valaris V120 MODU at Talbot
Notice to alert sea users to drilling and completion operations at the Talbot subsea development well location, in block 30/13e, using the Valaris V120 MODU.
The Valaris V120 jackup drilling rig is currently on location at the Jade platform. It is due to complete operations on the current well at the end of January, then move to the Talbot subsea development well location, in block 30/13e, to commence drilling and completion operations on three wells.
See detailed map on our bulletin website
Wellhead Structure - N. Eigg 3/24c-6b
Left wellhead structure - CL/1317/0. The N. Eigg 3/24c-6b wellhead (DrilQuip 18-3/4" SS-15 Rigid Lockdown 15,000 psi) will be left in place once the well suspension operations have been completed. The wellhead height above the seabed is 9 ft (2.74 m). The N. Eigg (3/24c-6b) wellhead is subject to its own Consent to Locate for a Permanent/Fixed Structure on the seabed.
The N. Eigg 3/24c-6b wellhead Consent to Locate will become effective when the PBLJ departs the N. Eigg location and the 3/24c-6b well is left suspended.
See detailed map on our bulletin website
Diving - Hewett Field
Flushing and disconnection of various pipelines. DSV Vessel Boka Da Vinci will be working within the Hewett field. Various pipelines connected to Littly Dotty/Deborah/Dawn subsea wells will be flushed from topsides and disconnected subsea by divers.
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Deployment of Spherical Directional Waverider Buoy - Northern North Sea
Shell deployed a new wave buoy in the Northern North Sea on 05-October-2021. Colour: Yellow, Size: 0.9 diameter, Fl: 5 10s
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Wellhead Severance and Recovery - Melville (210/24a-8)
The subsea Melville wellhead will be severed 10ft below the mudline & recovered, along with associated fishing gear debris.The operation will be conducted by the Well Enhancer well intervention vessel, which will hold on location using DP. The wellhead will be severed and recovered to the vessel.Up to two ROVs (one workclass, one observation) will be deployed, and debris baskets & deadman anchors will be temporarily placed on the seabed.Fishing gear entangled on the wellhead will be recovered.
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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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Dropped Pipeline - Carrack QA Platform
Dropped Pipeline 16 mtr x 4" section of redundant Pipeline resting on seabed. Plans to recover
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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 - Maersk Resilient
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 - Maersk Interceptor
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 - JB-115
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 2
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 - 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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Shallow Pipeline Protection - Bittern W/Inj PL1650 & Gas Lift PL1649
The 12-inch water injection pipeline PL1650 and piggybacked 4-inch gas lift pipeline PL1649 are in an approximately 1m deep seabed crater and covered by grout bags.
The 12-inch water injection pipeline PL1650 and piggybacked 4-inch gas lift pipeline were in freespan for approximately 10 metres with a span height of approximately 1 metre. The freespan has been filled with grout bags and the pipelines covered as far as practibale by divers.
An approximately 1m deep crater remains and the pipeline protection is now diver placed grout bags.
See detailed map on our bulletin website
Pipeline Installation - Evelyn Field
Tailwind Mistral Ltd intends to install pipelines and umbilicals from the existing Evelyn Well EV01 to the GEEBB Manifold and the Triton riser base, this will comprise: 8" production line with 3" piggyback gas lift line, Control umbilical line.
The Evelyn field is located within UK licence P1792 approximately 7.5km to the South West of the Dana Operated Triton FPSO. The development will consist of a single gas lifted production well EV01.
The 8" Pipeline route runs from the Evelyn valve skid (EVVS) drill centre tie-in structure in a north east direction to a comingling tie-in structure (GEEBB) which will comingle production fluids from Gannet E, Evelyn and Bittern. The GEEBB structure will be located outside the Triton swing circle, but inside its 500m safety zone. The 8-inch pipeline will be trenched and buried using trench backfill material. Areas which are not trenched at the Evelyn and Triton approaches will be protected from fishing gear interaction and/or dropped objects by a combination of rock placement and concrete protection mattresses.
The 3" Pipeline route runs in a south westerly direction between the GEEBB tie-in and distribution structure to the Evelyn valve skid (EVVS) drill centre tie-in structure. The GEEBB structure will be located outside the Triton swing circle but inside its 500m safety zone. The 3-inch gas lift pipeline will be piggybacked to the larger 8-inch production pipeline and will be trenched and buried using trench backfill material. Areas which are not trenched at the Evelyn and Triton approaches will be protected from fishing gear interaction and/or dropped objects by a combination of rock placement and concrete protection mattresses.
The 9.5 km control umbilical will be installed from the EVVS to the umbilical riser base at Triton FPSO. The umbilical will contain a total of 16 cores and will provide hydraulic, electrical and chemical supplies from the Triton dynamic umbilical at riser base SY9516A to the EVVS and wells
See detailed map on our bulletin website
Rig Move – Ensco 92 to Boulton BM Field
Harbour Energy plan to move the Ensco 92 Jack-up drilling rig from the Victor JM filed to the Boulton BM field location to perform abandonment operations on the Boulton BM 44/21a-B1Z, 44/21a-B2Y, 44/21a-B3 and 44/21a-B4 development wells.
Throughout well abandonment operations there will be a dedicated ERRV on location monitoring the surrounding sea area.
See detailed map on our bulletin website
Rig - Valaris 120
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 - 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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Installation of CAN Basic at Leverett Location
The CAN-basic will be deployed to the seabed by crane from a DP OSV, the Norman Maximus. The area will be monitored by guard vessel / ERRV until such time that the MODU arrives on location
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Rig - Haven
Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Foinaven Buoyant Risers
The Foinaven FPSO has been removed from the field as part of a decommissioning project. Beneath the FPSO were 13 buoyant risers which remain in the water column. These contain buoyant sections which sit up to 160m above the seafloor within the 500m zone. These provide a significant snagging risk to any vessel operating in the area.
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Open WHPS roof panels at the North West Bell field
The roof panels on the Wellhead Protection Structure (WHPS) at the North West Bell location are currently in an open position. The WHPS is within the existing 500m zone.
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Judy oil export tie in spool at NORPIPE wye - pipe exposure
Judy oil export tie in spool at NORPIPE wye - pipe exposure over ca 50m creating additional trawl hazard. Rock was removed from Judy oil export tie in spool at NORPIPE wye in mid 2022 in support of valve changeout at NORPIPE wye. Valve changeout has been delayed until 2025 at which point rock will be reinstated. Absence of rock poses an increased risk of snagging fishing nets and also of pipeline damage.
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Hazard - Block (T22-0521) at Curlew D safety zone
During debris recovery, a large block was observed by the ROV. Large block with dimensions of 4.0m x 2.2m x 0.5m found in position
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Fishing Advisory Zone - Ninian North
Seabed snagging hazards following the removal of the Ninian North jacket in April 2022 and the removal of the automatic 500-metre Safety Zone.
Following removal of the jacket structure below sea level, there remain a significant number number of seabed structures & items that are potential snagging hazards, within approx. 200 metres of the jacket position. These include:
- Jacket footings (to 46 metres above seabed)
- SSIV structure
- 12 impressed current anodes and associated cables
- Umbilicals
- Pipeline crossings, spans, exposed flanges/bolts
- Pipeline repair clamps with exposed bolts.
Confirmation of Cardinal Buoys Deployment – at the Pickerill A Jacket
On the 29th March 2022, Leask Marine's C-Force completed its buoy deployment at 11:00 . The vessel Departed Pickerill A Field at 13:00 for transit to Great Yarmouth after the completion of work and arrived alongside at 20:00 the same day. This is a final notification to confirm the 4 cardinal buoys are in their final position and will remain in place until 30th June 2024 as per approval from ML/784/0.
Pickerill A former Platform Lat: 53° 32’ 57.0875” N Long: 01° 04’ 33.3425” E
The cardinal buoys will be deployed within the Pickerill 500 m zone at the following coordinates:
UPDATE: The latest version of the marine Licence accepts the 4 buoys final location is precisely as above.
See detailed map on our bulletin website
Application for Offshore Development Area - Seagull Umbilical
Neptune E&P UK Ltd would like to request to establish an additional offshore development area in Block 22/29C for the Seagull Umbilical location.
The Seagull Field is located on UK licence P1622 Block 22/29C. 17km south of the Eastern Trough area Project (ETAP) Central Production Facility (CPF). Neptune will develop the Seagull reservoir as a subsea tieâ€back to existing seabed infrastructure over the BP operated ETAP CPF. The development is high pressure and high temperature and Neptune is the Operator for the subsea development. Neptune will also drill and complete the Seagull Wells and shall retain overall Project responsibility.
The Seagull development will require installation of new subsea equipment as follows: Four Xmas Trees; a 4 slot manifold; a 17km control umbilical (including hydraulic, electrical and chemical supplies) direct from ETAP to Seagull; a 5km 10” production pipeline; a 5km 3.5” wash water pipeline from Seagull to the existing Egret manifold; and a Wye manifold adjacent to the existing Egret manifold, through which the new Seagull production pipeline will connect with the Heron cluster pipeline system connected back to the ETAP CPF. From ETAP CPF Seagull oil and gas will be exported to shore through the GAEL and FPS pipeline systems to the Kinneil Terminal onshore.
We already have an ODA established covering the Seagull drill centre and the Egret manifold and would like to request to extend the ODA to incorporate the entire Seagull works area. The extended Offshore development area will be required commencing from September 2021 †March 2023.
See detailed map on our bulletin website
Pipeline Span - Dunbar to Alwyn: PL1043
Significant free-spans have been identified along the PL1043 Dunbar to Alwyn pipeline
Significant free-spans have been identified along the PL1043 Dunbar to Alwyn pipeline : Please exercise caution in these areas
See detailed map on our bulletin website
Plugged and Abandoned Well : Sween
Sween UKCS 3/30 : Abandoned Wellhead (3/30-7)
No overtrawlability trial done yet, rough ground may be experienced.
See detailed map on our bulletin website
Plugged and Abandoned Well : Balvenie
Balvenie UKCS 3/14: Abandoned Wellhead (3/14d-18)
No overtrawlability trial done yet, rough ground may be experienced.
See detailed map on our bulletin website