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Irish Sea Pioneer Rig Move - Douglas Accommodation to Hamilton North



Irish Sea Pioneer to move from Douglas Accommodation (DA) platform on the 23rd Sept to the Hamilton North platform (NUI).


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Subsea Decommissioning - Banff & Kyle



Vessels will be completing subsea decommissioning activities at the Banff and Kyle fields. Scopes are to be carried out mainly inside existing subsea 500m Safety Zones, but some scopes will be completed out-with these zones.


3-week campaign of subsea debris clearance and rock installation commencing 20th November 2024.

See detailed map on our bulletin website

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Decommissioning - Chestnut Field Phase 2



Spirit Energy has contracted the Deep-Ocean-operated Normand Jarstein construction support vessel (CSV) to undertake subsea infrastructure removal (and other) activities in connection with the continued decommissioning of the Chestnut field, located in UKCS block 22/2a of the central North Sea.


The vessel is scheduled to mobilise in Aberdeen South Harbour (or Peterhead) to allow removal activities in the field to commence as soon as 24th October 2024. The activities are scheduled to take approximately 5 days to complete (with no allowance for weather downtime).

 

Update 1st November 2024:

 

Removal activities of the Normand Jarstein CSV at Chestnut have been extended for a further approximately 10 days (from 2nd November, and not including an allowance for weather downtime). This is due to the contractor having brought forward a future phase of work to now commence immediately upon conclusion of the current phase.

 

De-mobilisation of the current phase / mobilisation of the next phase is scheduled for Peterhead over the coming weekend.

 

 

 

 

 

See detailed map on our bulletin website

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Ocean Endeavor MODU Move And Operations - Penguins Field



Notification for MODU of Ocean Endeavour at Penguins field.


Please note the anchors and the associated lines extend outwith the MODU 500m zone. 

See detailed map on our bulletin website

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Survey Works Fugro Orca - Liverpool Bay Pipeline survey



Pipeline survey works LBA. pipelines will be surveyed MBES and drop down ROV by unmanned Orca vessel.


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ROV Inspection Campaign Across Forties and Beryl Area



Apache North Sea will be carrying out its annual ROV Inspection Campaign across all Apache assets in the Forties and Beryl areas in early November 2024. The vessel will be the ROVSV EDT Jane and will be in the areas for 30 days.


ROV Operations in the areas and good communication with all other vessels in the areas.

See detailed map on our bulletin website

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Rock Dump at Schiehallion North West



The vessel "Van Oord Stornes" will be on location at Schiehallion North West Drill Centre to undertake rock dump operations. The operation will take approximately 18-24 hours and the vessel will have limited manoeuvrability whilst on site. The operation will take place within the Schiehallion North West 500m zone.


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Maintenance and repair activity - Eris, Ceres, Mercury and Seven Seas Areas



Maintenance and repair diving operations being conducted from the Boskalis Polaris in the Eris, Ceres, Mercury and Seven Seas Areas.


Spirit Energy are planning to conduct maintenance and repair operations from the Boskalis Polaris in the Eris, Ceres, Mercury and Seven Seas areas.  Operations are due to commence on 7th October 2024 and last for approximately 7 days.  These dates are subject to change depending on weather and operational requirements.

See detailed map on our bulletin website

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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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Rigmove - Valaris 121



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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Drilling - Baker Exploration well



Drilling of the Baker exploration well by the Noble Resilient jack-up drilling rig


Petrogas North Sea Ltd intends to carry out drilling operations using the jack-up drill rig “Noble Resilient” at the Baker gas field . The work is expected to take around 55 days at the Baker location after which the rig will move to the Abbey location for a further 85 days of drilling. However the actual duration will depend on both operational and weather factors. Whilst at each location the vessel will be static and connected to the seabed so is unable to move or manoeuvre its position.

 

Petrogas seeks the cooperation of fishermen to refrain from placing static fishing gear within 500m of the two Abbey or Baker well site locations, where the jack-up drill vessel will be working, This is to avoid any entanglement, interference or damage to either the fishing gear or drilling equipment.

See detailed map on our bulletin website

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Metocean Buoy Installed - Pierce Area



A spherical wave buoy with a diameter of 0.9 meters was installed in the Pierce Field.


WGS84:  57° 09' 20.401'N, 002° 16' 12.279'E

Clump weight: 500 kg steel ballast with chain

Deployment date: 29/08/2023

Radius cone: ~150m  

Model: Datawell Waverider

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

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Metocean Buoy Installed - Penguins Area



A spherical wave buoy with a diameter of 0.9 meters was installed in the Penguins Field.


WGS84:  61° 34' 37.77'N, 001° 31' 36.36'E

Clump weight: 500 kg steel ballast with chain

Deployment date: 24/07/2024

Radius cone: ~300m  

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

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Drilling of the Abbey well by the Noble Resilient jack-up drilling rig



Petrogas North Sea Ltd intends to carry out drilling operations using the jack-up drill rig “Noble Resilient” at the Abbey gas field . The work is expected to take around 100 days at the Abbey location. However the actual duration will depend on both operational and weather factors. Whilst at location the vessel will be static and connected to the seabed so is unable to move or maneuver its position.


Petrogas seeks the cooperation of fishermen to refrain from placing static fishing gear within 500m of the Abbey well site location, where the jack-up drill vessel will be working, This is to avoid any entanglement, interference or damage to either the fishing gear or drilling equipment.

See detailed map on our bulletin website

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Environmental Base Line Survey - 61093 Shell Sapphire CCS



The survey vessel 'Ocean Reliance' will be conducting an environmental baseline survey (EBS) in UKCS Block 47, comprising of water column sampling, CTD, seabed camera/video and seabed sediment grab sampling operations. A geophysical debris clearance survey will be conducted prior to the EBS, covering the environmental survey locations, utilising towed (Side Scan Sonar, Magnetometer) and hull mounted survey equipment


 

Debris clearance survey using towed Side Scan Sonar, magentometer and hull mounted Multibeam Echo Sounder, Single Beam Echo Sounder over the proposed environmental survey locations.

 

Environmental Base Line Survey, comprising:-

24 x Sediment sampling stations at 2 x Primary well locations (12 x stations per well)

1 x Reference station

30 x Camera transect stations at the 2 x Primary well locations (15 x stations per well)

24 x Water sampling stations

See detailed map on our bulletin website

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Rig move - Ensco 92 Southern North Sea



Harbour Energy are scheduled to complete Abandonment operations (using the Ensco 92 jack up) at the Murdoch KM field and then move the rig to the Hunter HK location. This move is currently planned for the 01/11/24.


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Subsea Infrastructure Decommissioning - Rockdump Brent Area



The Subsea Infrastructure Decommissioning project remains ongoing. Following completion of the pipe recovery the next phase of the workscope is to rockdump the pipeline ends across various pipelines in the Brent Area. Vessel : Van Oord Stornes


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Survey - Brent Debris Survey



A vessel, Armada 7801, will be in the Brent field conducting visual debris survey. 


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Rig Move - Dolphin PBLJ to Brodgar field



Harbour Energy are scheduled to complete Drilling operations (using the Dolphin Paul B Loyd Junior – Semi Submersible) at Gilderoy 15/28b- and then move the rig to the Brodgar field in the Central North Sea block 21/03a. This move is currently planned for the 01/11/24.


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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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OGW Rig - Schiehallion North Drill Centre



Please be advised that the semi-sub rig Ocean Great White is now hooked up at North DC, using the below noted mooring pattern. There are no surface buoys on site. Anchor handler vessels have departed, and the rig expects to be on site for 5 - 7 weeks.


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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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Annual subsea facilities inspection - North Sea



ROV inspection of subsea infrastructure with multiple ROV's from ROVSV, likely the Deep Vision.


Visual inspection, cleaning and cathodic protection measurements.

 

14 day period within the Start and End Date below.

See detailed map on our bulletin website

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ROV Visual Pipeline Inspections - Shell Pipelines Southern North Sea



Ocean Infinity Armada 7801 lightly crewed ROV/Survey Vessel to perform pipeline inspections along various Shell pipeline routes


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Ground Moorings at Alligin Drill Centre



Seven mooring ground chain and pennant sections were recovered during the week commencing 14th October, as part of the rig move to Schiehallion North. One mooring remains in place until further notice, at the below noted location. There are no surface buoys or mid-water sections.


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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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Well Intervention Work - HAEVA at ST3 Ravenspurn Field



Please be advised that the HAEVA Jack-Up Barge (JUB) is due to depart from the Arthur subsea manifold on 30th September 2024 (at the earliest and dependent on weather), and transit to ST3 (UKCS 42/30) in the Ravenspurn Field, where it will commence Well Intervention work. The estimated earliest arrival date of the HAEVA at ST3 is 1st October 2024. The JUB will remain on location at ST3 until latest 31st March 2025.


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Paul B Lloyd Jnr (PBLJ) Rig Move Notification - Gilderoy to Brodgar



The MODU Paul B Lloyd Jnr is planned to depart the Gilderoy location (Block 15/28) and move to the Brodgar manifold area (Block 21/03) towards the end of October 24


In advance of rig arrival at Brodgar, moorings have been pre-laid within a radius of ~2000m from the position below;

57 54 56''N 000 30' 46''E (ED 50)

 

The moorings are currently being guarded by the GV 'Ocean Rose'.  Where environmental conditions permit, a Guard Vessel shall remain on location until arrival of the rig.

 

Cordinates for each mooring chain and anchor etc are further provided in Lat/Long (WGS 84) format, in the attachments to this notice.

 

Planned rig move operations are likely to be undertaken from ~25th -29th October (subject operations and weather), during the 12nm tow between locations the rig shall be towed by 2 AHV's (TBN) and further assisted by 3 vessels during 'hook up' operations, appropriate day/night signals shall be displayed throughout. All vessels are requested to maintain a wide berth from the associated operations.

See detailed map on our bulletin website

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Penguins Pan NW Well Tie-in



The Pan NW Infill project will be achieved by drilling a new well and installing the associated subsea infrastructure to route production to a new FPSO in field via the existing DC2 manifold. Vessel: DSV Deep Discoverer (TechnipFMC)


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E&A Well Decommissioning Campaign - Whittle 42-28b, Bell 49-23-8, Davy 53-05a-3, Davy East 53-05b



Excavation, cutting and removal of conductors to achieve AB3 status. Mobilisation of the "MSV Kingsborg" to complete a scope of work on 4 x E&A wells.


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Penguins Riser Installation & Kestrel Phase 4



As part of the ongoing Penguins Redevelopment Project, the Boskalis Boka Northern Oceans - mobilised in June - has now been completed to progress installation of the subsea infrastructure. This campaign will also include the installation of several mechanical protection GRP structures which will be performed at various locations throughout the Penguins field. The Seven Kestrel DSV has partially completed work scope and the Boskalis Boka Northern Oceans will depart field 12/10/24.


Seven Kestrel DSV to return to field at earliest opportunity, further details to be confirmed shortly.

 

See detailed map on our bulletin website

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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 - 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 - JB-115 ACP L11-B



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 - 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 - 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 - 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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2024 CSV Decommissioning



CSV BOKA Northern Ocean is mobilising for Harbour Energy on 16th October for a ~45 day offshore campaign to carry out subsea decommissioning scopes. The vessel will be working at various locations in the SNS and CNS.


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Rig move - Valaris 123



Valaris 123 drilling rig will be moving from the Selene field to the Pensacola field weather depending on Friday 1st November and be under tight tow to the Pensacola field with estimated arrival on Monday 5th November.


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Pre-Lay of anchors - Kingfisher



Pre-Lay of anchors for Ocean Endeavor rig to perform well decommissioning.


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Development Project - Victory Field



The Victory Project is to develop the Victory subsea gas field as a single well tie-back to the Shetland Gas Plant. This is to be achieved by drilling a new well and installing a pipeline to route hydrocarbons via an existing hot tap tee into the existing Greater Laggan Area (GLA) pipeline system to export via the Shetland Gas Plant.


All planned construction vessels this year have completed their works.  An update on 2025 Vessel will be updated soon.

 

Pipeline installation including the 2 x PLEM Structures one at each end of the pipeline system. The Pipeline is 14" carbon steel line, routed from Victory well location to the hot tap tee location on existing GLA pipeline.

 

Note; the Victory wellsite is within an Offshore Development Area and as such, is not for entry by trawlers.

See detailed map on our bulletin website

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Subsea Seismic Nodes - Leman Field



Please be advised that 12 retrievable nodes will be deployed on the seabed in the Leman Field as part of upcoming spot seismic survey.


12 retrievable nodes will be deployed on the seabed for the duration of upcoming seismic survey - their deployment is anticipated from October 25th 2024 until March 31st 2025. These nodes are 1m x 1m in size, the ballast weighing 26kg with a 10kg bouyant. These nodes will not be marked by a surface buoy. 

See detailed map on our bulletin website

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Decommissioning - Leman 27J



Decommissioning activity will be carried out at the Leman 27J platform between July and November 2024. The ERDA Jackup Barge will be interfaced with the platform for the duration of the project. The decommissioning will involve the plug and abandonment of all wells, making the topside hydrocarbon safe (HSC), and the removal of the topside and it transport to shore for recycling.


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Subsea Construction & Pipelay Activities - Talbot & Affleck Developments



Harbour Energy intends to undertake subsea construction & pipelay works on the Talbot Field Development project between March & October 2024. The Field Development traverses across UKCS Blocks 30/07b, 30/12a, 30/13d & 30/13e. In addition, NEO Energy also intends to undertake subsea construction & pipelay works on the Affleck Field redevelopment project commencing ca. 18th April 2024. The Field Development traverses across UKCS Blocks 30/07b, 30/12a, 30/13c, 30/13d, 30/13e, 30/14a & 30/19a.


Talbot Field Devleopment Project

 

Subsea activities on Talbot will commence 31st March 2024 with diving preparatory works within the Judy Platform 500m safety zone.  This will be followed by the installation of a new 15km long 12”/18” Pipe-In-Pipe Pipeline and Electro Hydraulic Chemical (EHC) Control Umbilical between the Talbot Field and the Judy Platform.  A Survey Support Vessel (SUV) will be used to support pipeline and umbilical lay operations as well as performing the pre-commissioning activities for the newly installed pipeline.  A Trenching Support Vessel (TSV) will be used to plough and backfill the pipeline and umbilical.  On completion of pipelay and trenching activities, a rock dump vessel will perform spot rock dump activities along the pipeline and umbilical route and at the existing pipeline crossing locations. 

 

A subsea manifold structure (Talbot DC1 Manifold) will be installed at the Talbot field location using a Construction Support Vessel (CSV).  The CSV will also install a further subsea structure (Talbot SSIV Manifold) within the Judy Platform 500m safety zone. 

 

A Dive Support Vessel (DSV) will perform the tie-ins of the newly installed pipeline and umbilical at the Talbot DC1 Manifold location and within Judy Platform 500m safety zone. The DSV will also support the commissioning of the pipeline and umbilical. 

 

All vessels will be transiting back and forth between the Talbot and Judy locations numerous times during the construction phase.

 

Affleck Field Development Project 

 

Subsea activities on Affleck will commence circa 18th April 2024 with a new 21km 8”/12” Pipe-In-Pipe Pipeline to be laid between the Affleck Manifold and the Talbot Field DC1 Manifold, and a new 36km Electro Hydraulic Chemical (EHC) Control Umbilical to be laid between the Judy Platform and the Affleck Manifold.  In support of the pipelay and umbilical lay there will be a survey support vessel and two Trenching vessels, one to plough and backfill the pipeline and one to jet trench the EHC Umbilical.  The survey support vessel will also be performing the pre-commissioning activities for the newly installed pipeline.  The vessels will be transiting back and forth between these locations numerous times during the construction activities.

 

A Dive Support Vessel (DSV) will be performing the tie-ins of the newly installed pipeline and umbilical at the Affleck Manifold Location, the Talbot DC1 Manifold location and within Judy Platform 500m zone.  The DSV will also support the commissioning of the pipeline and umbilical.

 

On completion of pipelay and trenching activities a rock dump vessel will perform spot rock dump activities along the pipeline and umbilical route and at the existing pipeline crossing locations.  The rock dump activities are currently split into two separate scopes.

 

The earliest start date for Affleck operations to commence is 18th April 2024.

 

Key Co-ordinates

 

Key location co-ordinates are given in this bulletin.  Also, please refer to the attached marked-up Admiralty Charts.  

 

There are established 500m safety exclusion zones at all of these locations.   Construction vessels will be operating both within and between all of the above mentioned 500m safety zones during the construction phase.  All mariners are advised to remain clear of these locations until construction operations are completed.

 

Vessel Details

 

The combined Talbot and Affleck operations will be undertaken from the following vessels:

 

Operation

Vessel

Call Sign

Dates in Field

Dive Support Vessel (DSV) – Talbot Preparatory Works

Deep Arctic

C6XW3

March / April

Survey Support Vessel (SUV)

Olympic Triton

LADM3

April / May / June

Talbot & Affleck Pipeline Installation Vessel

Deep Energy

C6YL2

April / May

Construction Support Vessel (CSV) – Talbot Umbilical and Structures Installation

North Sea Atlantic

LAYS7

May

Affleck Umbilical Installation Vessel

Deep Energy

C6YL2

October

Talbot & Affleck Pipeline Trenching Vessel (TSV)

Normand Drott

LDRO

May / June

Affleck Umbilical Trenching Vessel (TSV)

North Sea Enabler

LACJ8

October

Dive Support Vessel (DSV)

Deep Arctic

C6XW3

July - Oct

Rockdump Vessel (FFPV) Pipeline

Nordnes 

PHOG 

June

Rockdump Vessel (FFPV) Umbilical

Nordnes (TBA)

PHOG (TBA)

Oct / Nov

Guard vessels

Various

Various

April to Nov

 

 

See detailed map on our bulletin website

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Buoyant Risers - Foinaven Field



As per a previous notification (Sep 2022), the Petrojarl FPSO has been removed from the Foinaven field. 13 risers remain on site, with buoyant sections located up to 160m above the seabed. A recent check confirmed riser location and height has not changed, but they remain a snagging hazard. 3 new Statutory Instrument 500m safety zones replace the original FPSO safety zone - visible on Admiralty charts and Fishsafe. The zones fully encompass all buoyant risers, and remaining seabed assets.


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SEAL / Shearwater Project



The Vessel Seven Falcon (Call Sign 2EEN9) will be carrying DSV Operations in the vicinity of the location noted below for an approximate period of 18 days.


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Acoustic Monitor - Culzean Field



In preparation for the installation of a floating Wind Turbine at Culzean - an acoustic device will be deployed near to the proposed wind turbine location at the Culzean field.  The acoustic device will be at the location noted below - but will extend to a total height of 25m above the seabed. The device will deployed from 24th September 2024 (depending on weather) and will be in place for approx. six months.  


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COSL Innovator drilling at Guillemot North West Field



The COSL Innovator will be on location at the Guillemot North West Field from the 27th September for approximately 83 days.


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Subsea Disconnects Campaign 2B - Cormorant Alpha, Pelican



Taqa are decommissioning NNS asset Cormorant Alpha and associated subsea facilities UMC and Pelican. The Subsea 7 vessel "Seven Atlantic" will be undertaking operations to flush, disconnect and isolate UMC, Pelican and gas export / import line PL17 from Cormorant Alpha.


Taqa are decommissioning NNS asset Cormorant Alpha and associated subsea facilities UMC and Pelican. The Subsea 7 vessel "Seven Atlantic" will be undertaking diving operations to flush, disconnect and isolate UMC, Pelican and gas export / import line PL17 from Cormorant Alpha.

See detailed map on our bulletin website

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Penguins Redevelopment Project - Offshore Development Area



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. An offshore development area has been granted on the 18th April 2024 to further protect the pressurised infrastructure during the ongoing construction phase.


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

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Victory Development - Offshore Development Area



The Victory Project consists of the development of the Victory Subsea gas field as a single well tie-back to the Shetland Gas Plant. An Offshore Development Area has been put in place during the construction phase based upon the planned location of the Victory PLEM (North) between May 2024 and September 2025.  The offshore development area for Victory Project was granted on the 20th March 2024. (see Schematic drawing att.)


UKCS Block ID: 206/4a, 206/5c and 207/1a

Water Depths refer to Lowest Astronomical Tide (LAT) with all depths quoted in metres – 126m – 296m

No visible marker (marker buoys) will be deployed.

See detailed map on our bulletin website

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Metocean Survey - Clair Ridge Are



bp is planning to carry out metocean survey activities within the Clair area. Near seabed current data and associated parameters will be collected over an initial period of 12 months. The survey will be undertaken using an MPV and the total survey time is expected to be 3 days for deployment and 365 days for survey activities. The survey operations will involve the placement seven metocean deployments with moorings on the seabed that will remain in place for a year.


Between 24/09 and 27/09, the seven laid metocean buoys will be recovered, serviced and redeployed at the same target location. Further, the Metocean 5 deployment will be fitted with an additional current meter such that the deployment height will increase from 13m to 34m above the seabed.

See detailed map on our bulletin website

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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 - 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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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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Wet Store Area - Drilling Riser Pipe - North of the Schiehallion North West drill centre



Drilling riser pipe sections have been stored on the seabed in a designated area to the north of the Schiehallion North West drill centre. The riser pipe sections have been anchored to remain up to 3 m above seabed. This area is outside of the 500m zone for Schiehallion North West and poses a snagging risk to any fishing vessel operating in the area.


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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 - Noble 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 - Valaris 248 (ex 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 - 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 - 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 - Shelf Drilling Winner (ex 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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Ground Moorings - Schiehallion North West



Four mooring ground chain and pennant sections were recovered during the week commencing 1st July, as part of the Alligin pre-lay operation. Four moorings remain in place until further notice, at the below noted locations in the Schiehallion NW field. There are no surface buoys or mid-water sections.


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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 - 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 - 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 Move - Shelf Drilling Fortress



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 - 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 - 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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HAM E flushing and disconnection - HAM N and HAM M inspections - Liverpool Bay Area



DSV will support and carry out flushing from HAM E to HAM N. lines will then be disconnected and relocated. optional inspection scopes are at HAM N and HAM M. platform leg inspections only. Other platforms could be subject to ROV or diver inspections, this is currently only back-up work


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Diving - Hewett Field



Flushing and disconnection of various pipelines. DSV Vessel Boka Da Topaz will be working within the Hewett field. Various pipelines connected to Littly Dotty/Deborah/Dawn/DELLA/DELILAH subsea wells will be flushed from topsides and disconnected subsea by divers. P&A activities with V72 RIG


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Hazardous Structure - North West Hutton Platform Footings



Please note that the four footings of the decommissioned North West Hutton Platform are not included on the current FishSAFE information (v48). This omission will be corrected in the next data issue. The area is covered by a 500m advisory zone, as the platform footings remain in place post-decommissioning and represent a significant snagging risk.


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Disconnection - Brent WLGP (PL17)



This scope of work is to flood the Cormorant Alpha to WLGP SSIV production pipeline PL17, before cutting and recovering a short section within the NL-WL PLEM 500m safety zone, as part of a series of works to de-energise Cormorant Alpha. Vessel Name: Seven Atlantic


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Structure in situ - Leverett CAN



Leverett CAN-basic left in situ until it is recovered by a vessel. Following the drilling of the Leverett appraisal well, the Transocean PBLJ and its anchors left the location on 14th February. The Leverett CAN-basic structure will remain in situ at the well location until it is recovered.


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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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Rig - Noble Reacher (ex Maersk)



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 - 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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Freespans along Fulmar Gas Line



Freespans, not greater than Kingfisher critical span reporting criteria but potential hazard. These will be monitored over time. Next inspection planned in Q4 2024.


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Rig move - Valaris Norway Douglas to Lennox



Valaris Norway Planned rig move Douglas to Lennox,


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Brent Subsea Infrastructure Decommissioning (SID) - Outstanding Works



The vessel 'Olympic Ares' will be undertaking outstanding decommissioning works that will include: Debris & grout bag recovery works from SPAR PLEM, VASP, NLGP SSIV, & within the safety zones at BA, BB, BC & BD; degraded Mattress recovery from BA & NLGP SSIV; anode skid recovery from some decommissioned pipelines; anchor pile removal from BA splitter box; and recovery of Brent 7 guide base in open water, between BB and BC and recovery of umbilical severance device on PLU6294, near the NLGP SSIV.


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Valaris 123 Drilling Unit - Selene Well



Valaris 123 jack up rig arrived on location 23-July-2024. Valaris 123 jack up rig will stay on location for ~90days to drill Selene well.


Valaris 123 jack up rig arrived on location 23-July-2024. Valaris 123 jack up rig will stay on location for ~90days to drill Selene well. 

See detailed map on our bulletin website

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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 - 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 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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Pipeline Decommissioning - Western Isles to Tern



The 6" gas export / import pipeline between the Western Isles and Tern Developments will be decommissioned.


The Pipeline will be disconnected from the Tern subsea isolation valve (within the Tern platform 500 m safety exclusion zone) and the Western Isles North Riser Base (within the Western Isles FPSO / mid-water arches 500 m safety exclusion zones). Surface-laid connecting spools and associated mattresses at both ends of the pipeline will be removed. The pipeline sections back to the existing rock armour cover will be cut and recovered. The exposed ends will be temporarily protected useing concrete mattresses, and subsequently permanently covered with new rock armour.

See detailed map on our bulletin website

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Western Isles infield subsea infrastructure decommissioning



Infield pipelines and manifolds associated with the Western Isles Development will be decommissioned


Risers, tie-in spools, manifolds and mid-water arches will be recovered from the seabed. The surface laid pipeline bundles serving the North and South drill centres will have appurtenances removed from their upper surfaces, but will remain in place until a decommissioning option is finalised. Wellheads will be left in place with existing fishing protection structures pending a future plug and abandonment campaign.

 

New rock armour will be deposited to protect exposed pipeline bundle ends at the North and South Drill Centre and North and South Riser Base locations.

See detailed map on our bulletin website

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Seabed hazards following removal of Banff FPSO anchors & moorings



A series of deep, steep sided trenches at mooring line touchdown points. Moorings and anchors have been removed, leaving the seabed features.


10 mooring line trenches, varying in length from 70m to 180m; up to 8 metres wide and up to 9 metres deep. These trenches are steep-sided, cut into the clay seabed. Remediation of 7 of these trenches has been partially completed, although seabed verification has not yet been carried out.

See detailed map on our bulletin website

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Western Isles FPSO & moorings decommissioning



The Western Isles FPSO will be disconnected from the subsea risers and moorings and floated off station. The mooring lines and piles will subsequently be recovered.


The FPSO will be disconnected from the subsea production, water injection and service umbilical risers, which will be temporarily laid on the seabed. The FPSO will then be disconnected from its moorings, with mooring lines also temporarily laid down on the seabed. The FPSO will then be towed off station using anchor handling tugs. The mooring lines will be recovered and the mooring piles will be cut 3 m below the seabed.

See detailed map on our bulletin website

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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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MODU Operations At Penguins



Operations with Stena Don MODU at Penguins location. Note: Anchor lines extend outwith the rig 500m zone


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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. Produced fluids will be exported via a subsea pipeline to the Shearwater platform where these will be processed before onward export via the Fulmar Gas Line and the Forties Pipeline System. Vessels: SUV1/Deep Discoverer/Deep Energy/Normand Drott /SUV2 (Olympic Trition).


Jackdaw Installation 2024/2025

New Riser installed to Shearwater A using DSV.

New pipeline will be installed between Shearwater A and Jackdaw.

New SSIV will be installed within the Shearwater 500m zone using DSV or CV.

New electro-hydraulic/chemical umbilical & associated protection material will be installed between Shearwater C and new Shearwater SSIV using DSV.

New SSIV will be installed within the Jackdaw 500m zone using DSV or CV.

New electro-hydraulic/chemical umbilical will be installed between Jackdaw wellhead Platform and New Jackdaw SSIV using DSV.

New tie-in spools & associated protection material will be installed between new pipeline and Jackdaw riser via new SSIV using DSV.

See detailed map on our bulletin website

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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 Move - V120 to Judy Riser Platform



Harbour Energy plan to move the V120 Jack-Up drilling rig from the Talbot open water location to the Judy Riser Platform location in block 30/07a to perform a drilling campaign on three wells. The Judy installations have a dedicated Emergency Response and Rescue Vessel (ERRV) on location monitoring the surrounding area.


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