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Survey - Central North Sea(Ref: 1191)



A 62 Day Survey between April - 30th June.


Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Shearwater

Geoservices Ltd

TBC

8000m

18m

01/04/2021 - 30/06/2021

For 62 Days

19,20,21

See detailed map on our bulletin website

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Survey - Southern North Sea(Ref: 1163)



A 165 Day Survey between April - 31st October. Using the vessel Amazon Warrior Call sign: 3FNE9.


Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Shearwater

Geoservices Ltd

Amazon Warrior

3FNE9

8m

01/04/2021 - 31/10/2021

For 165 Days

35,36,37,38,

41,42,43,44

See detailed map on our bulletin website

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Decommissioning Activities – Hydrocarbon Free Activities on the Galahad Installation



Planned HCF works are due to commence on the Galahad (UKCS 48/12BA


The Jack up Barge HAEVA, will depart from Amethyst A1D (UKCS 47/14) and transit to the Lancelot Area Pipeline System (LAPS) field to the Galahad Installation, where it will commence HCF operations.

See detailed map on our bulletin website

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Survey - Debris Survey Buckland Drilling location (Ref: 1221)



A 2 Day Debris Survey Buckland Drilling location between the 4th May 2021 - 31st October. Using the vessel Fugro Galaxy Call sign: C6YY4.


Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Fugro GB (North) Marine Ltd

Fugro Galaxy

C6YY4

N/A

04/05/2021 - 31/10/2021

For 2 Days

9

See detailed map on our bulletin website

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Notification of survey - Fugro Meridian



The Fugro Meridian survey vessel will be mobilising from the port of Portsmouth on or around 6th May 2021 to undertake survey operations in the vicinity of the York platform in UKCS block 47/3.


The Fugro Meridian survey vessel will be mobilising from the port of Portsmouth on or around 6th May 2021.  The vessel will be undertaking multibeam echo sounder and sidescan sonar survey operations in the vicinity of the York platform in UKCS block 47/3.  The survey location is outlined in the attached file and comprises an area of approximately 0.5 km2.

 

The vessel is likely to be on location for a period of 1 day.  

 

This schedule is subject to change depending on operational demands.  

See detailed map on our bulletin website

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Survey - Regional Deep Imaging Project (June - mid-June operations)



GeoexMCG will be acquiring the Regional Deep Imaging Project 2021 (RDI21) between May and September 30th, 2021. The survey is a cross border 2D seismic survey in Norway, UK, Faroe Islands and Denmark.


The aim of the survey is to image deep seated crustal structures in the North Sea and a single source of 6,270 cu.in and one cable of 12 km length towed at 15-30m depth (slant) will be used. The survey will be carried out by the seismic vessel M/V Akademik Lazarev (UAJS) and Jan van Gent (YJVF4) will be the support vessel.

 

There will be two FLOs onboard, one Norwegian from Geograf Maritime and one from SFF Service Limited (Scottish Fishermen's Federation). In addition, the vessel will have MMO and PAM operators onboard. 

Since RDI21 is a very regional survey, there will be some flexibility in deviating from the preplotted survey lines, if needed.  

 

(Please note that d/t limitations in the number of coordinates possible to submit in the online notice submission system, the survey has been divided into several notices where each notice contains the lines that are planned to be acquired within the time frame specified in the heading. The .png map shows the full RDI21 2D survey outline.)

See detailed map on our bulletin website

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Seismic 2D Survey - RDI21 - MCG21001 (May operations)



GeoexMCG will be acquiring the 'Regional Deep Imaging Project 2021' (RDI21) between May and September 30th, 2021. The survey is a cross border 2D seismic survey in Norway, UK, Faroe Islands and Denmark.


The aim of the survey is to image deep seated crustal structures in the North Sea and a single source of 6,270 cu.in and one cable of 12 km length towed at 15-30m depth (slant) will be used. The survey will be carried out by the seismic vessel M/V Akademik Lazarev (UAJS) and Jan van Gent (YJVF4) will be the support vessel.

 

There will be two FLOs onboard, one Norwegian from Geograf Maritime and one from SFF Service Limited (Scottish Fishermen's Federation). In addition, the vessel will have MMO and PAM operators onboard.

 

Since RDI21 is a very regional survey, there will be some flexibility in deviating from the preplotted survey lines, if needed.  

 

The survey has been divided into several notices where each notice contains the lines that are planned to be acquired within the time frame specified in the heading. The .png map shows the full RDI21 2D survey outline.

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 and areas of disturbed seabed with clay boulders at the anchor locations, caused during recovery of the anchors. 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 (in many cases vertical, cut into the clay seabed).

10 anchor scars, consisting of shallow trenches (20-90 metres long), shallow-sided depressions (less than 2 metres deep) but with areas of significantly disturbed seabed, including clay boulders up to 3 metres in size.

See detailed map on our bulletin website

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Rig Movement - Deepsea Atlantic



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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Survey - Regional Survey (Ref: 1198)



A 81 Days Regional Survey between the 15th April 2021 - 30th September. Using the vessels SW Amundsen Call sign: 5BXE2, Support Vessel MV Scorpio call Sign: ZDRF7 & Tess sign: YJUV8


Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Shearwater GeoServices AS

SW Amundsen

5BXE2

MV Scorpio

ZDRF7

Tess

YJUV8

8100m

8m

15/04/2021 - 30/09/2021

For 81 Days

210, 211

See detailed map on our bulletin website

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Power Cable Replacement Operations - Forties Field



Power Cable Replacement Operations between Forties Alpha Satellite Platform to Forties Echo Platform (MV Normand Cutter) mob date 19th April 2021


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Pipeline Activities - Arran Field



A Pipeline Initiation System (an arrangement of anchors, chains and wires) has been installed within the Arran South 500m safety zone (installed on 28/09/20). Further vessel activity will be taking place in the area as below.


DSV (Seven Falcon) – Spool & Umbilical Installation (Subsea 7) Arran Field Development - Infield 21/04/21 – Depart Field 03/05/21

  • 12” spool installation at Arran South
  • Hook up umbilicals at Arran South
  • Mattress protection at Arran South (12” spools and umbilicals)
  • Scoter spool removal at Shearwater
  • Umbilical crossing mattress installation at Shearwater
  • 12” spool install and mattressing at Shearwater

 

DSV (Seven Falcon) – Pipeline Leak Test and Dewatering (Subsea 7) Arran Field Development - Infield 30/04/21 – Depart Field 21/05/21

  • 12” spool installation at Shearwater
  • Pipeline leak test at Columbus
  • Mattress Reinstatement
  • Dewater pipeline system at Arran North
  • Umbilical tie-ins at Arran South
  • 6” XT spools & TSCJ at Arran South
  • Tree spool leak test
  • OCH install at Arran South
See detailed map on our bulletin website

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Penguins Field - Vessel Activity



Penguins Field Development - Bundle XT Tie-ins and DC2 Bundle XT Tie-ins


Seven Atlantic DSV – FPSO Bundle XT Tie-Ins (Subsea 7) Penguins Redevelopment Project - Infield 20/03/21 – Depart Field 03/04/21

Greenfield tie-in work within the Penguins field, connecting the 3 new DC7 flowbases to the newly installed FPSO bundle.  The scope will include barrier testing, spool deployment and installation, TSCJ installation and subsequent mattress and grout bag protection works.

 

 

Seven Oceanic RSV – Wet Store Spools Ph1 (Subsea 7) Penguins Redevelopment Project - Infield 10/04/21 – Depart Field 20/04/21

Main scope will include the wet storing of new tie-in spools within the Penguins Field and also the Brent C 500m zone.  Additional activities will include the installation of concrete corner blocks adjacent to the newly installed towheads and the recovery of buoyancy tanks from the newly installed bundle systems.

 

Seven Atlantic DSV – DC2 Bundle XT Tie-Ins (Subsea 7) Penguins Redevelopment Project - Infield 05/05/21 – Depart Field 19/04/21

Greenfield tie-in work within the Penguins field, connecting the PAN-N and Tybalt flowbases to the newly installed DC2 bundle.  The scope will include barrier testing, spool deployment and installation, TSCJ installation and subsequent mattress and grout bag protection works.

 

DEME Flintstone Rockdump Vessel - Rockdumping at DC2 Bundle - Penguins Redevelopment Project - Infield 09/05/21 – Depart Field 13/05/21

  • Partial DC2 Bundle rockdump

 

Seven Atlantic DSV (Subsea 7) Gas Export & Tybalt Tie-ins - Penguins Redevelopment Project - Infield 03/05/21 – Depart Field 16/05/21

  • Gas Export Tie-ins at DC5
  • Tie-in spools between RBM & GE Pipeline
  • Tie-in Spools at Tybalt

 

Seven Pegasus DSV (Subsea 7) Tie-ins, Leak Test and De-watering - Penguins Redevelopment Project - Infield 19/05/21 – Depart Field 26/07/21

  • Gas Export Tie-Ins, Leak Test and De-watering 
  • Complete D7 Tie-ins
  • Brownfield Bundle Tie-ins (DC2)
  • DC2 Bundle Tie-Ins
  • Brownfield Bundle Tie-ins (DC3 midline)
  • UT Checks (Brownfield)

 

DEME Rockdump Vessel – Rockdumping - Penguins Redevelopment Project - Infield 30/06/21 – Depart Field 03/07/21

  • Re-instatement of Rockdump at DC4 DBBV
  • Partial DC2 Bundle Rockdump

 

See detailed map on our bulletin website

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Site and Pipeline Survey - Southwark Field (Ref: 1209)



IOG is developing the Southwark Field, which involves the installation of a platform and a pipeline, to a connection to the existing Thames pipeline. This notice advises the survey activities being performed in advance of the installation.


During April and May 2021 Titan Environmental, on behalf of IOG, will be performing surveys, primarily located at the platform location, with additional surveys along the pipeline route to the south:

  1. a pre-installation debris and bathymetric survey for the platform will cover an area approximately 700-metres x 700-metres, centred at the proposed Southwark location, as listed below, 
  2. a pre-installation debris and bathymetric survey of the proposed 24-inch pipeline between the proposed Southwark platform location and the Thames pipeline.

The work will consist of using vessel mounted and towed sensors to scan the seabed, with no intrusive works.

See detailed map on our bulletin website

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Elgood to Blythe & Blythe to Thames, Pipeline and Umbilical Surveys



This NtM relates to surveys being performed over the existing pipelines between the Elgood and Blythe Fields and the connection with the Thames Pipeline, in the UK sector of the southern North Sea.


During April and May 2021 Titan Environmental, on behalf of IOG, will be performing surveys, primarily located within the +/-100 metre pipeline fishing exclusion/safety zones at the following locations:

  1. A pre-installation survey for an umbilical, which will be laid immediately adjacent to the 6-inch pipeline between Elgood and Blythe, 
  2. A survey of the existing 6-inch pipeline between Elgood and Blythe,
  3. A survey at the Blythe platform site, partly covered by the pipeline exclusion/safety zones,
  4. A survey of a site connecting the 12-inch Blythe pipeline to the 24-inch Thames pipeline connection site.

The work will consist of using vessel mounted and towed sensors to scan the seabed, with no intrusive sensors.

 

See detailed map on our bulletin website

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Danger to Fishing - Claymore Scapa Template



Fishing activity has been observed within a 500m Safety zone at Claymore Scapa template.


Note fishing has been observed over subsea infrastructure including 40m L x 35m W x 11H Template structure that is within a 500m Safety zone.

 

The safety zone is to protect all parties and is a legally restricted area that can only be entered under Special Circumstances;

             1. To attempt to save a life or property,

             2. Owing to bad weather ,

             3. When in distress.

All vessels including fishing vessels must not fish within or transit over the 500m safety zone.

See detailed map on our bulletin website

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Sean field to Bacton Pipeline stabilisation work.



Sean field to Bacton (PL311) Pipeline freespan rectification in 20 locations by deposition of graded rock from a vessel fall pipe.


Pipeline surveys identified twenty freespans along the PL311 Sean Field to Bacton pipeline that require remediation.  The freespans are located between KP 51.8 and KP 93.4 (Note: KP 0 is near the Sean Platform and KP 106 is near the shore approach at Bacton).  The cause of the freespans is expected to be scour caused by high seabed currents and the mobile nature of the sediment.  Graded rock (2ʺ - 8ʺ) will be accurately deposited from a fall-pipe vessel to fill in the spans and create rock berms up to the pipeline centreline that will support the pipeline and discourage future scour .  Prior to rock deposition, an as-found, pre-inspection survey will be undertaken to identify if there is any debris requiring removal.

See detailed map on our bulletin website

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Decommissioning of the Brynhild pipelines at the Pierce field



Please note that Lundin Energy Norway AS is carrying out offshore decommissioning works this summer in Blocks 23/22b, 23/22a and 23/27a of the Central North Sea.


Decommissioning works on the UKCS will commence late May 2021 with disconnection and recovery of cut sections of a 10" production pipeline and an umbilical inside the FPSOs 500m safety zone. This in order to disconnect the Brynhild subsea manifold in Norwegian waters from the FPSO Haewene Brim located on the Pierce field in the UK. The works are expected to be completed by late July 2021.

 

The following vessels will be active during the decommissioning campaign;

 

Vessel name

Task

Call sign

Period

Maersk Forza

Construction vessel

OYWO2

25.05.21 – 15.07.21

Edda Freya

Construction vessel

LKRV3

28.06.21 – 30.07.21

 

Location Coordinates

Brynhild field NCS                                            57° 29.317' N - 002° 18.039' E 

Pierce Field Riser base manifold UKCS       57° 09.461' N - 002° 17.288' E

 

For further information, please contact:

Geir-Olav Fjeldheim, Lundin Energy Norway AS, Tel: +47 926 64 830 email: geir-olav.fjeldheim@lundin-energy.com

See detailed map on our bulletin website

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Isabella Project - Soil Investigations



The Normand Flower (Call Sign: LAXN7) will be carrying out a Soil Investigations within the area noted below:


The Normand Flower (Call Sign: LAXN7) will be carrying out a Soil Investigations within the area noted below:

Survey is expected to start on 8th May and take approx. 2 weeks to complete.

See detailed map on our bulletin website

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West of Shetland – Power Reinstatement Project – Stage 3



The Deep Arctic (Call Sign: C6XW3) will be carrying out Umbilical Repair activities BETWEEN the various locations noted below :


The Deep Arctic (Call Sign: C6XW3) will be carrying out Umbilical Repair activities BETWEEN the various locations noted below :

Start date = 11th May 2021

Duration expected to be approx. 45 Days

See detailed map on our bulletin website

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West of Shetland – Power Reinstatement Project - Stage 2



The Far Superior (Call Sign: LATJ7) will be carrying out Umbilical Repair Support & Testing activities BETWEEN the various locations noted below:


The Far Superior (Call Sign: LATJ7) will be carrying out Umbilical Repair Support & Testing activities BETWEEN the various locations noted below :

Start date = 13th May 2021

Duration expected to be approx. 50 Days

 

See detailed map on our bulletin website

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Clump Weights for Mariner Well Load Relief System



4 x clump weights for Mariner 8Y wellhead load relief system. Installation planned for early May


4 x clump weights to be installed for Mariner 8Y wellhead load relief system around 5th May.

 

This will be followed up with rig mooring pre-lay later in May for planned rig (West Hercules) arrival in June.

 

All subsea components will be guarded by the Mariner Field ERRV until the rig arrives.  

See detailed map on our bulletin website

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Premier Oil Cross Asset Inspection Campaign - Rita & Hunter, Johnston



Premier Oil UK Ltd (hereafter referred to as Premier Oil) is a subsidiary of Harbour Energy Plc. Premier Oil are planning to undertake a cross asset inspection campaign using the Subsea 7 chartered MMA Pinnacle ROVSV.


Premier Oil are planning to undertake a cross asset inspection campaign using the Subsea 7 chartered MMA Pinnacle ROVSV. Fields to be inspected include; Rita & Hunter, Johnston.

 

The survey will last 72 days in total, however each site to be surveyed will last 2-20 days, depending on the location and any operational delays e.g. weather.

 

The MMA Pinnacle is scheduled to mobilise Saturday the 1st May 2021 to first survey location; Rita & Hunter.

 

Start date: 1st May 2021 and end date of 7th August 2021

See detailed map on our bulletin website

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Premier Oil Cross Asset Inspection Campaign



Premier Oil UK Ltd is a subsidiary of Harbour Energy Plc. Premier Oil are planning to undertake a cross asset inspection campaign using the Subsea 7 chartered MMA Pinnacle ROVSV. In addition, two wrecks within the Catcher area will be visually inspected.


Premier Oil are planning to undertake a cross asset inspection campaign using the Subsea 7 chartered MMA Pinnacle ROVSV. Fields to be inspected include; B-Block (encompassing Balmoral, Stirling, Glamis, Blair, Brenda and Nicol), Caledonia, Nelson, Huntington, Catcher (encompassing Burgman, Varadero and Wreck sites).

 

The survey will last 72 days in total, however each site to be surveyed will last 2-20 days, depending on the location and any operational delays e.g. weather.

 

The MMA Pinnacle is scheduled to mobilise Saturday the 1st May 2021 to first survey location; Rita & Hunter.

 

Start date: 1st May 2021 and end date of 7th August 2021

See detailed map on our bulletin website

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Premier Oil Cross Asset Inspection Campaign - Solan Field



Premier Oil UK Ltd (hereafter referred to as Premier Oil) is a subsidiary of Harbour Energy Plc. Premier Oil are planning to undertake a cross asset inspection campaign using the Subsea 7 chartered MMA Pinnacle ROVSV.


Premier Oil are planning to undertake a cross asset inspection campaign using the Subsea 7 chartered MMA Pinnacle ROVSV. in the Solan Field

 

The survey will last 72 days in total, however each site to be surveyed will last 2-20 days, depending on the location and any operational delays e.g. weather.

 

The MMA Pinnacle is scheduled to mobilise Saturday the 1st May 2021 to first survey location; Rita & Hunter.

 

Start date: 1st May 2021 and end date of 7th August 2021

See detailed map on our bulletin website

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Safety Zone Now Active - Elgood Wellhead



Due to the installation of oil & gas equipment on the seabed on 14 April 2021, the below safety zone is now active.


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Rig - Borgland Dolphin



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Noble Sam Turner



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig Move - Transocean PBLJ - to MacCulloch EDC



Chrysaor (a Harbour Energy company) plan to move the Transocean PBLJ drilling rig from the MacCulloch West Drill Centre (WDC) to the East Drill Centre (EDC) to continue the MacCulloch well abandonment campaign.


The PBLJ is currently carrying out P&A operations at the MacCulloch West Drill Centre (WDC). During early May 2021 the rig will be towed to the East Drill Centre (EDC) to P&A the E1 subsea well.

 

An attendant vessel will guard the pre-laid moorings until rig arrival.  Moorings are up to ~2300m from rig centre. Following rig arrival there will be a dedicated ERRV on location monitoring the surrounding area. 

See detailed map on our bulletin website

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Installation of the Southwark Platform



During May 2021 Seaway Heavy Lifting, on behalf of HSM and IOG, will be installing a steel jacket and topsides at block ref 49/21, the Southwark Field.


During May 2021 Seaway Heavy Lifting, on behalf of HSM and IOG, will be installing a steel jacket and topsides at block ref 49/21, the Southwark Field.

 

The work will involve the utilisation of heavy lift vessel (HLV) Seaway Strashnov to lift the structures from a cargo barge onto a pre-determined seabed location.

 

In addition to the HLV there will be towing and anchor handling vessels in the vicinity.

 

It is planned for the HLV to operate in Dynamic Positioning (DP) mode but there is contingency to deploy up to 8 anchors to assist in maintaining position.

 

Upon installation of this permanent fixed structure (extending above the sea surface) a permanent 500-metre radius safety zone shall come not effect and it is requested that no vessel shall transit within 500-metres of the Southwark Platform locality.

See detailed map on our bulletin website

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Installation of Blythe Platform



During May 2021 Seaway Heavy Lifting, on behalf of HSM and IOG, will be installing a steel jacket and topsides (adjacent to the Dudgeon Wind Farm) at block ref 48/23, the Blythe Field.


During May 2021 Seaway Heavy Lifting, on behalf of HSM and IOG, will be installing a steel jacket and topsides (adjacent to the Dudgeon Wind Farm) at block ref 48/23, the Blythe Field.

 

The work will involve the utilisation of heavy lift vessel (HLV) Seaway Strashnov to lift the structures from a cargo barge onto a pre-determined seabed location.

 

In addition to the HLV there will be towing and anchor handling vessels in the vicinity.

 

It is planned for the HLV to operate in Dynamic Positioning (DP) mode but there is contingency to deploy up to 8 anchors to assist in maintaining position.

 

Upon installation of this permanent fixed structure (extending above the sea surface) a permanent 500-metre radius safety zone shall come not effect and it is requested that no vessel shall transit within 500-metres of the Blythe Platform locality.

 

Note: Pipelines radiating from the platform are trenched and covered below natural seabed level.

See detailed map on our bulletin website

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Survey - Alvheim 4D towed streamer survey (ABP21002)



Aker BP ASA is conducting a 4D towed streamer acquisition with PGS Geophysical AS. The vessels on the field will be Ramform Vanguard and Sanco Chaser. This is a cross border seismic survey, with the main part of the survey on the Norwegian side.


AkerBP ASA is conducting a 4D seismic survey over the Alvheim field. It is anticipated that the UK section will take in total a maximum of six days to complete, but not acquired in one go. The Survey Area at Alvheim will cover 50 square kilometres in UK waters. The Greater Work Area will cover 180 square kilometres in UK water.

See detailed map on our bulletin website

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Survey - Evelyn Site Survey (Ref: 1125)



A 1 day survey 50m around proposed anchor positions and anchor cables where they extend from the previously surveyed at the Evelyn Site. Using the vessel Noordhoek Pathfinder Call sign: PBYN from 23rd April 2021until 29th May 2021.


Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

N-Sea Offshore Ltd

Noordhoek Pathfinder

PBYN

N/A

23/04/2020 - 29/05/2021

For 1 Day

21

See detailed map on our bulletin website

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Snagging Hazards - Decommissioned Murchison jacket footings - Fishing Advisory Zone



600m x 600m box covering the remaining jacket footings post-decommissioning. Area inside this region will NOT be verified by overtrawl survey.


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Unmanned Bathymetry Surveys - NEP Project



3 XOcean Unmanned Vessels undertaking hull mounted bathymetry surveys. Vessels are 4.5m x 2.2m x 2.2m and are fully controlled via satellite 24 hours a day. All vessels will be using Hartlepool and Grimsby to transit in and out of for bad weather.


An unmanned survey operation to collect hull mounted bathymetry data using 3 vessels. The vessels are all fully controlled 24 hours a day using satellite communications. During periods of bad weather XOcean will use Hartlepool or Grimsby to transit to for shelter. The area of operation will cover the project area at Endurance and two proposed pipeline route corridors.

See detailed map on our bulletin website

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Well Guideposts - Schiehallion Loyal Field



The LW17 well within the Schiehallion Loyal field has been left with 4 Guideposts attached to the structure which extend approx. 7.5m above seabed. The well is within the Loyal 500m safety zone but the guideposts will pose a significant hazard to fishing.


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Fishing Hazard - Dons Fields Decommissioning Works



The Northern Producer FPF has been removed from it’s moorings and towed to port for decommissioning but the subsea assets within the Northern Producer FPF 500m zone will remain in place on the seabed and could pose a snag hazard to fishermen


The Northern Producer FPF has been removed from it’s moorings and towed to port for decommissioning but the subsea assets within the Northern Producer FPF 500m zone will remain in place on the seabed and could pose a snag hazard to fishermen therefore the Thistle Alpha Platform ERRV will act as a guard vessel until the 500m zone clearance is performed in 2022.

 

This includes the 8 No Risers draped over the Mid Water Arch (MWA), the MWA Clumpweight Guide Frame, the Riser Base Structure (RBS) and the surface laid pipelines / Umbilicals.  The MWA will remain in the water column at a depth of 112m and will remain tethered to the seabed via the clumpweight guide frame. The risers will remain draped over the MWA with one end on the seabed and the other end will remain connected to the RBS so that they remain stable. The existing stabilisation mattresses will remain in place over the surface laid pipelines/umbilicals.

See detailed map on our bulletin website

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Survey - Seabed Debris Garten Drilling Location (Ref: 1152)



A 1 day Seabed debris survey covering the anchor pattern of a semi-submersible rig at the Garten drilling location. Using the vessel Fugro Galaxy Call sign: C6YY4


Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Fugro GB (North) Marine Ltd

Fugro Galaxy

C6YY4

N/A

07/11/2020 - 30/09/2021

For 1 Day

9/13,14,18

See detailed map on our bulletin website

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Survey - Pipeline & Umbilicals (Ref: 1213)



A 99 Day Pipeline & Umbilical survey, Balmoral and its tied-back fields: Stirling, Glamis, Blair, Brenda, Nicol, Beauly and Burghley. Using Vessel MMA Ocean Pinnacle Call Sign: 9WNM1. From the 1st May until 7th August 2021.


Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Subsea 7

MMA Pinnacle

gWNM1

N/A

01/05/2021 - 07/08/2021

For 99 Days

16, 15

See detailed map on our bulletin website

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Tolmount Development Area



Notice to alert sea users to the ongoing drilling activity of the Valaris 123 Jackup Drilling Rig at the Tolmount Platform in Block 42/28d .


The Tolmount minimum facilities platform has been installed on behalf of the Tolmount Development Project (comprising Premier Oil UK Limited, ODE Asset Management Limited and Humber Gathering System Limited (HGSL)) in UKCS Block 42/28d and an ERRV remains on location in field. 

 

The Valaris123 Jackup Drilling Rig is in position over the Tolmount platform, with drilling operations underway.  Drilling activity is planned for approximately 12 months (subject to further Kingfisher bulletins). NW well is now completed and the Valaris 123 has skidded to the SE well slot to recommence drilling operations.

 

Please note that an Offshore Development Area has also been requested for the Tolmount Development Project work.

See detailed map on our bulletin website

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Rig - Stena Spey



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Transocean Equinox



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - West Bollsta



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Maersk Integrator



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Maersk Invincible



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Dropped steel cage/basket (West of Shetland)



A steel cage has been dropped from a fishing vessel following snagging and partial recovery. The cage is metal in construction and appears to be from the oil & gas industry. Dimensions: 1.7m x 1.7m x 1.6m (height). Weight: 132kg (in water); 575kg (in air)


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Pre-Lay Moorings for West Hercules



Pre-lay mooring installation for West Hercules


Pre-lay moorings to be installed for the West Hercules from earliest 1st May. 

Mooring installation will be protected by a Guard Vessel until the rig arrives on location

See detailed map on our bulletin website

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Exposed Wellheads - Arran Field



Due to storm damaged the Ocean Endeavor has left the Arran Field for repairs. In the absence of the rig, a guard vessel will be located at Arran to protect the two exposed wellhead structures that remain.


Arran North 2 is completed but does not yet have the Xmas Tree installed.

 

Arran North 1 will be left with the rigs blow out preventer installed on the wellhead as it will not be possible for the rig to recover it before departure.

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Survey - Alexandra, Victor Debris Clearance (Ref: 1164)



A 5 Day Gardline Alexandra, Victor Debris Clearance Survey. Using Vessel MV Ocean Reliance Call Sign: HP6391 From the 15th January until 31st July 2021


Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Gardline Limited

MV Ocean Reliance

HP6391

N/A

15/01/2021 - 31/07/2021

For 2 Days

49

44

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NW Schooner Subsea Well - Missing Debris Cap



The Debris Cap for the NW Schooner subsea well has been identified as missing, leaving the wellhead more vulnerable to snagging on fishing nets. The Debris Cap is 4.5m x 3.9m x 1.4m and approx 3.5 tonnes, whilst the wellhead stands 6m off the seabed.


The approximate dimensions of the Debris Cap is 4.5m x 3.9m x 1.4m with a weight of approximately 3.5 tonnes. It is not known whether the Debris Cap is lying within a 500m zone of the well. A 200m x 200m area centred on the well has been searched, with no sight of it. Therefore the exact location of the Debris Cap is unknown. The loss of the Debris Cap leaves the NW Schooner wellhead more vulnerable to snagging from trawler/fishing nets. The approximate size of the tree with over trawl legs deployed is 7.8m x 7.8m x 6m high.

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Survey - Boyla 4D towed streamer survey (ABP21001)



Aker BP ASA is conducting a 4D towed streamer acquisition with PGS Geophysical AS. The vessels on the field will be Ramform Vanguard and Sanco Chaser. This is a cross border seismic survey, with the main part of the survey on the Norwegian side.


AkerBP ASA is conducting a 4D seismic survey over the Boyla field. It is anticipated that the UK section will take a maximum of four days to complete. The Survey Area at Boyla will cover 37 square kilometres in UK waters. The Greater Work Area will cover 151 square kilometres in UK water. The Company will conduct line changes in the greater work area.

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Light Well Injection Project : Ellon/Forvie/Jura



The Well Enhancer (Call Sign: 2ARS4) will be carrying out a Light Well Intervention (LWI) programme at the Ellon / Forvie / Jura locations noted below:


The Well Enhancer (Call Sign: 2ARS4) will be carrying out a Light Well Intervention (LWI) programme at the

Ellon / Forvie / Jura locations noted below:

 

Start date = 15th April 2021

Duration expected to be approx. 57 Days to 11th June 2021

See detailed map on our bulletin website

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Safe Caledonia at Elgin PUQ



The Flotel Safe Caledonia is alongside ELGIN PUQ – within 500m zone.


The Flotel Safe Caledonia is alongside ELGIN PUQ – within 500m zone. Providing additional accommodation for ongoing fabric maintenance campaign.

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Rig - Scarabeo 8



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Deepsea Yantai



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig Movement - Noble Hans Deul



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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Dive Support Vessel Polaris Operations - Hewett Field



Dive Support Vessel Polaris, mobilisation from Great Yarmouth and saturation diving works at x2 Subsea Wells and at the jacket base of 52/5A Platform within Hewett Field.


Subsea Wells Operations - 48/30-15z Subsea Well :  Well Preparation for Flushing /  Preparation for Well Plugging & Abandonment 

- 48/30-8 Subsea Well :  Well Preparation for Flushing /  Preparation for Well Plugging & Abandonment 

 

Platform PL83 Pipeline Operations

- PL83 Pipleine Mattress & Spool Removal (35-50mts) from Jacket Base out to circa 50mts in preperation of Rig arrival.

 

All Saturation Diving and ROV works inside 500mtr zone of each asset safety zone. 

 

Vessel will transit within Hewett Field from location to location during the course of the saturation diving works.

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Brae Bravo Decommissioninig



Decommissioning and removal of the Brae Bravo Platform will be undertaken throughout 2021. Removal of topside modules and flare bridge will be undertaken ahead of removal of the main jacket in 2022.


Decommissioning and removal of the Brae Bravo Platform will be undetaken throughout 2021. Removal of topside modules and flare bridge will be undertaken ahead of removal of the main jacket in 2022.

 

Vessels will be operating near to and within the 500m safety zone as indicated.

 

Thialf

The Thialf will be alsongside the Brae Bravo platform between the 15th of April 2021 and the 24th of May 2021.

 

Bylgia

The Bylgia will enter the worksite between the 1st of May 2021 and 3rd of may 2021.

 

Sleipnir

The Sleipnir will be alsongside the Brae Bravo platform between the 15th of April 2021 and the 24th of May 2021. The Sleipnir will then return to the field to continue removal works circa 15th July2021.

 

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Buzzard Field - Pipeline bundle tow and installation



A pipeline bundle will be launched, towed to and installed in the Buzzard field.


A pipeline bundle will be transported using the Off Bottom Tow Mode (OBTM) and Controlled Depth Tow Method (CDTM). The bundle will be launched from Sinclair's Bay North of Wick and towed to the installation area suspended between one or more lead tugs and a trail tug and accompanied by a guard vessel and ROV support vessel.

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Rig Move - Maersk Resolve



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Seafox 4



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig Move – Ensco 92 to Victor Field



Chrysaor plan to move the Ensco 92 Jack-up drilling rig from the Viking field location to the Victor field location perform abandonment operations on the Victor JM 49/17-11 development well.


Destination: Victor JM 49/17-11 development well 53° 21' 03.22" N 2° 17' 43.46" E Throughout well abandonment operations there will be a dedicated ERRV on location monitoring the surrounding sea area

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Snagging Hazard - Dropped Object Weight 115kg



Wireless telemetry basket containing measuring 1.4 m x 1.4 m and weighs 115 kg when submerged.


As part of the initial drilling operations in 2019, the wellhead assembly was fitted with a cap containing a transponder for the relaying of monitoring data from downhole gauges and a basket was placed on the seabed adjacent to the well containing associated wireless telemetry equipment. 

 

It has now been observed that both the cap and the basket are no longer present. 

 

PFML are on location conducting an ROV based visual inspection of the suspended Well 205/26b-14 in the Lincoln field west of Shetland.  The Olympic Taurus arrived at the well location and deployed the ROV for inspection at the seabed.  On inspection neither the cap or basket were present.

 

No instances of snagged fishing gear or other debris have been identified on the wellhead. 

 

The risk is that trawled gear may snag on the basket and cause damage.  It is expected that he basket is too light to trap the vessel and cause any significant threat.  The cap is smaller, so there is a risk the nets may lift the cap to surface and cause a risk to personnel on the vessel.  However, as the cap is now off the wellhead, it is likely to be sitting flush with the seabed and is unlikely to be picked up by gear working in this area, as it is typically designed to bounce over the top of seabed obstacles (like the many boulders in the area). 

 

 

The vessel and ROV has conducted a search around the well, 250 m x 250 m grid with 20m line spacing, and not identified the objects.

 

PFML intend to go back to abandon the well this year, which would include an as left survey, so further efforts will be made then to locate and recover.  If not found, no other action will be taken.

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Rig Movement - Seajacks Leviathan



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 Movement - Safe Caledonia



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 Movement - Seafox 2



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 - 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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Thames Pipeline PL370 - Inspection



During April and May 2021 Titan Environmental, on behalf of IOG, will be performing a survey along the Thames pipeline to determine burial.


The work will consist of using the vessel Titan Discovery, equipped with vessel mounted and towed sensors to scan the seabed, over and on either side of the pipeline, with no intrusive works.

See detailed map on our bulletin website

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Safe Boreas accommodation vessel in Buzzard field



The Safe Boreas accommodation vessel is mobilising to the Buzzard field on April 18th 2021 for a maximum of 190 days


The Safe Boreas accommodation vessel is being located into the Buzzard field for the turnaround period, beginning on the 18th April 2021. The accommodation vessel will use dynamic positioning and will be located within the 500 m exclusion zone of the Buzzard Platform for up to 190 days. The Safe Boreas will be linked to Buzzard QU Platform via a gangway interface.

See detailed map on our bulletin website

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Survey - Catcher Area (Ref: 1203)



A 42 Day Catcher Area Survey between the 17th April 2021 - 29th May 2021. Using the vessels PGS Ramform Hyperion call sign: C6DB4, Thor Omega call sign: OZ2065, Groen Miranda call sign: 6CR7


Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Petroleum Geo-Services

PGS Ramform Hyperion

C6DB4

Thor Omega

OZ2065

Groen Miranda

6CR7

6650m

5m

17/04/2021 - 29/05/2021

For 42 Days

28

See detailed map on our bulletin website

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Survey - East Orkney Site Survey (Ref: 1206)



A 6 Day East Orkney Site Survey between the 9th April 2021 - 30th September. Using the vessel Geo Ocean III Call sign: LXGP.


Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

GEOxyz UK

Geo Ocean III

LXGP

150m

3m

09/04/2021 - 30/09/2021

For 6 Days

6,7,12,13,14

See detailed map on our bulletin website

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Survey - Leman Pipelines (Ref: 1208)



A 5 Day Leman Pipelines Survey between the 15th April 2021 - 31st May. Using the vessel MV Ocean Reliance Call sign: HP6391.


Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Gardline Limited

Ocean Reliance

HP6391

N/A

15/04/2021 - 31/05/2021

For 5 Days

49

See detailed map on our bulletin website

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Rig - West Hercules



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Haeva



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Safe Zephyrus



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rosebank Field Metocean Monitoring Buoys



4 x metocean monitoring buoys in the Rosebank Field area 1 x surface wave buoy 3 x subsurface buoys at 40m, 160m, and 630m


4 x Metocean monitoring buoys will be in place at the Rosebank Field until approximately Q4 2021.

3 of these buoys are subsurface with only the wave monitoring buoy on the surface.  

 

The wave buoy is painted yellow, equipped with solar panels, flashlight, active and passive radar reflectors. The active radar reflector responds to interrogating X-band radar (9.3-9.5 GHz)

See detailed map on our bulletin website

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Rig - Valaris 72



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Survey - Brodgar Infill 2021 (Ref: 1200)



A 3 Day Survey Brodgar Infill between the 15th April 2021 - 31st May. Using the vessels SW Amundsen Call sign: 5BXE2, MV Scorpio call Sign: ZDRF7 & Tess Call sign: YJUV8


Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Shearwater GeoServices AS

SW Amundsen

5BXE2

MV Scorpio

ZDRF7

Tess

YJUV8

8000m

15m

15/04/2021 - 31/05/2021

For 3 Days

21

See detailed map on our bulletin website

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Decommissioning Activities – Hydrocarbon Free Activities on the Amethyst A1D Installation



Planned Hydrocarbon Free works are due to commence on the Amethyst A1D platform (UKCS 47/14).


The HAEVA Mobile Offshore Decommissioning Unit (Modu) will depart from Vlissingen in the Netherlands 3rd March 2021 (dependent on weather) and transit to the Amethyst field, where it will commence Hydrocarbon Free operations.

See detailed map on our bulletin website

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Survey - Alvhelm Prospect (Ref: 1193)



A 6 Day Site Survey at the Boyla Prospect between the 01st April 2021 - 31st August. Using the vessels Ramform Vanguard Call sign: C6TU8 & Sanco Chaser Call sign: ZDHH3.


Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

PGS Geophysical AS

Ramform Vanguard

C6TU8

Sanco Chaser

ZDHH3

6500m

6m

01/04/2021 - 31/08/2021

For 4 Days

9

See detailed map on our bulletin website

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Survey - Boyla Prospect (Ref: 1192)



A 4 Day Site Survey at the Boyla Prospect between the 01st April 2021 - 31st August. Using the vessels Ramform Vanguard Call sign: C6TU8 & Sanco Chaser Call sign: ZDHH3.


Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

PGS Geophysical AS

Ramform Vanguard

C6TU8

Sanco Chaser

ZDHH3

6500m

6m

01/04/2021 - 31/08/2021

For 4 Days

9

See detailed map on our bulletin website

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Rig Move - Maersk Resilient



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Catcher Field 3D / 4D Seismic Survey



Premier Oil UK have contracted PGS to conduct a Seismic survey over the Catcher Area assets located in block 28/9, the survey will also partly extend into blocks 28/3, 28/4 and 28/10. The survey is planned to commence 17th April 2021 and last 33 days.


The Seismic survey vessel to be used by PGS is the PGS Ramform Hyperion, call sign C6DB4, registered in the Bahamas. It is due to be mobilised from Flora in Norway on the 11th April and start shooting Seismic on 17th April 2021. The survey is due to last 33 days.

 

PGS Ramform Hyperion will be accompanied by two other vessels. The Thor Omega (support vessel)  that will also mobilise from Flora and the Groen Miranda (escort vessel) , which will mobilise from Scheveningen, Netherlands.

 

Seismic survey operations will be by active surveying and the firing of airguns

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Drilling - Grove Platform UKCS Block 49/10a



The Maersk Resolve drilling rig will be mobilising from the port of Esbjerg in Denmark on or around 10th March 2021. The rig will be undertaking drilling activities at the Grove platform in UKCS block 49/10a expected to arrive at Grove on 12th March 2021.


The rig is likely to be on location for a total period of 130 days. 

See detailed map on our bulletin website

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Snagging hazard - Near Well 3/03-12



Unidentified snagging hazard at, or close to, the location of well 3/03-12.


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Decommissioning Activities – HCF / Topsides Dismantlement of the Amethyst C1D Installation



Planned Topside dismantlement works are due to commence on the Amethyst C1D Platform (UKCS 47/14).


The Jack up Barge, will depart from Leman 27BT (UKCS 49/27B) 25th February 2021 (dependent on weather) and transit to the Amethyst field, where it will  commence HCF/Topsides dismantlement operations on Amethyst C1D Platform (UKCS 47/14).

See detailed map on our bulletin website

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Rig - Transocean Endurance



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Prospector 1



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Erda - Amethyst 47/14-C1D



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Suspended Wellhead : Affleck 30/19-1



Suspended wellhead structure on seabed.


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Pipeline Flushing and Riser Decommissioning - Balmoral Area



Premier Oil’s project to flush & disconnect the Greater Balmoral Area subsea infrastructure and removal of associated risers in relation to the float-off of the Balmoral FPV will be undertaken between 28th February and 31st December 2021.


Locations Coordinates
Balmoral FPV & Template

58°13.727'N 001°06.427'E

Tap Valve No.3 (Forties Pipeline System) 58°06.622'N 001°09.449'E
Balmoral Satellite Well B29 58°15.127'N 001°03.323'E
Balmoral Satellite Well A2 58°13.970'N 001°07.953'E
Brenda Drill Centre 58°11.763'N 000°58.407'E
Brenda Umbilical cut point 58°13.810'N 001°06.318'E
Nicol Drill Centre 58°14.908'N 000°50.812'E
Stirling 20z Well 58°14.010'N 001°08.063'E
Glamis A26 Well 58°10.695'N 001°01.045'E
Glamis A27 Well

58°10.308'N 001°04.168'E

Burghley WH1 Well 58°16.052'N 001°14.148'E
Beauly Well 58°11.028'N 001°07.632'E

 

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Damaged pipeline



Physical damage to pipeline


Physical damage to pipeline, current cause unknown. Vessel on scene assessing.

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Abandoned Well - 206/12a-3



This wellhead has been removed from the seabed.


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Abandoned Well - 29/04e-5Z



This wellhead has been removed from the seabed.


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Abandoned Well - 9/19b-29 & 9/19b-29A



This wellhead has been removed from the seabed.


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Drilling - Elgood Well 48/22c-H1



Petrofac Facilities Management Ltd (PFML) propose to drill and complete a production well at the Elgood Subsea location, from the 9th March 2021 for, the duration of, 89 days. The drilling operation will be carried out by Noble Hans Deul drilling rig.


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Abandoned Well - 44/18-2Z



This wellhead has been removed from the seabed.


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Maersk Highlander at Elgin WHP B



The jack-up rig Maersk Highlander is alongside Elgin WHP B – within 500m zone for the next 6 months (approximately)


The jack-up rig Maersk Highlander is alongside Elgin WHP B  – within 500m zone for the next 6 moths (approximately)

See detailed map on our bulletin website

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Suspended Wellhead - Tolmount Main NE 42/28d-16



There is a new suspended wellhead on the seabed. These can be up to 4 metres high, they are not protected by 500m Safety Zones and are not required to have an overtrawlable protection structure.


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Suspended Wellhead - Tolmount Main SW 42/28d-17



There is a new suspended wellhead on the seabed. These can be up to 4 metres high, they are not protected by 500m Safety Zones and are not required to have an overtrawlable protection structure.


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Suspended Wellhead - Tolmount Main SE 42/28d-18



There is a new suspended wellhead on the seabed. These can be up to 4 metres high, they are not protected by 500m Safety Zones and are not required to have an overtrawlable protection structure.


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Rig - Valaris 122



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Maersk Intrepid



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Rowan Stavanger



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Ensco 120



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - 590021



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Transocean Spitsbergen



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Valaris Gorilla VI



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Survey - Proposed Drilling Survey Diadem Well (Ref: 1166)



A 6 Day proposed drilling survey of the Diadem Well. Using Vessels Fugro Galaxy Call Sign: C6YY4 & Fugro Synergy Call Sign: C6XR3 from the 18th January until 01th June 2021


Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Fugro GB North Marine Ltd

Fugro Galaxy

C6YY4

Fugro Synergy

C6XR3

700m

3m

18/01/2021 - 30/06/2021

For 6 Days

22

See detailed map on our bulletin website

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Rig - Rowan Viking



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Pile Installation - Penguins Field



A number of items will be left installed/wet stored on the seabed around the Penguins Field. Pile Fast Frame (together with pile stick-up) 8 x piles (completed with multiple clay protrusions/blocks) 9 x chains (210m long, 177mm diameter).


Details of Seabed - West Cluster

Pile No Location Clay plugs at pile location
1 61°35.020'N    01°31.070'E  1.30m height x 2.5 dia.
2 61°34.990'N    01°31.070'E 2.00m height x 2.5 dia.
3 61°35.020'N    01°31.060'E 1.50m height x 2.5 dia.
4 61°35.050'N    01°31.070'E 1.50m height x 2.5 dia.

Note: 210m of 177mm dia. chain has been laid on seabed at each location towards the FPSO centre.

 

Details of Seabed - North East Cluster

Pile No Location Clay plugs at pile location
5 61°35.550'N    01°33.430'E 1.30m height x 2.5 dia.
6 61°35.540'N    01°33.470'E 2.00m height x 2.5 dia.
7 61°35.520'N    01°33.510'E 1.50m height x 2.5 dia.
8 61°35.510'N    01°33.550'E 1.50m height x 2.5 dia.

Note: 210m of 177mm dia. chain has been laid on seabed at each location towards the FPSO centre.

 

Details of Seabed - Southern Cluster

Pile No Location Comments
9 61°34.450'N    01°33.500'E

Fast frame is currently located at pile location 9 (11.85m x 11.70m x 30m

Note: 30m pile is installed in this fast frame

See detailed map on our bulletin website

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Leadon Area – Possible Trawl Hazards



Six small structures (approx. 0.5m high x 1.5m long and 0.6m across) were located on the top of the disused Leadon Bundles in UKCS Block 9/14. These small structures are located at the points listed.


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Topsides and Jacket Removal - Brent Alpha Platform



Brent Alpha Platform (topsides and jacket) have been removed. The Jacket footings protrude 55.24m metres above the seabed. There is no longer a Safety Zone around the Brent Alpha remaining structure.


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Decommissioning - Ninian Platform



Two cardinal buoys in proximity to Ninian North Platform, after removal of platform topsides (and associated navaids) in 2020.


West cardinal buoy (Fl. Q. (9). 15s), including ground tackle, with 400m excursion radius. Buoy fitted with AIS.

East cardinal buoy (Fl. Q. (3). 10s), including ground tackle, with 400m excursion radius. Buoy fitted with AIS.

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Ninian North jacket



Top of Ninian North jacket 6m above sea level - no navaids or lights


The topsides has been removed from the Ninian North installation, leaving the jacket structure still in place. The top of the structure is approximately 6 metres above sea level. With the removal of the topsides, the remaining jacket structure is unlit and is not fitted with any navaids; cardinal buoys are located to the East & West.

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Buzzard Field - unconnected subsea infrastructure



Drilling activity in the Buzzard Field will cease for 2020 in September leaving 4 x Xmas Trees and 2 x wellhead conductors unconnected in the field until the subsequent subsea campaign in 2021. The locations are in the table below.


Subsea structure

Manifold Slot

Coordinates ED50

Protection structure

PN1

57° 50' 44.150" N

000° 54' 35.320" W

Xmas Tree

PN3

57° 50' 42.899" N

000° 54' 34.214" W

Protection structure

PN5

57° 50' 44.988" N

000° 54' 38.071" W

Xmas Tree

PN7

57° 50' 45.401" N

000° 54' 36.426" W

Xmas Tree

IN1

57° 50' 45.817" N

000° 54' 34.780" W

Xmas Tree

IN2

57° 50' 43.312" N

000° 54' 32.569" W

 

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Exposed Cable - Tampnet Fibre Optic Cable - Penguins (UK) - Snorre A (NOR)



Please be advised that the installation of the Tampnet fibre optic cable is still ongoing and that there is currently approximately 4.5km of EXPOSED CABLE on the seabed. We advise all seafarers and fishermen to keep clear of using any bottom equipment.


Please be advised that the installation of the Tampnet fibre optic cable is still ongoing and that there is currently approximately 4.5km of EXPOSED CABLE on the seabed as per attached drawing. We advise all seafarers and fishermen to keep clear of using any bottom equipment that might interact and damage the cable in vincinity of the route. We are also broadcasting and raising awareness from land and nearby guard vessels to all fishermen approaching the cable route. The installation is expected to be ongoing until mid September. 

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Dropped Mattress - Shell 34" Pipeline



The 6th mattress for the Shell 34” pipeline will be recovered between 14th November - 31st January 2021 by the Seven Falcon. The Fleximat dimensions are 6.4m x 3.0m x 0.5m Weight in Air 15860kg.


During overboarding of the 6th mattress for the Shell 34” pipeline, the crane wire parted when the matt was entering the splash zone at approx. 25m above seabed. The Fleximat dimensions are 6.4m x 3.0m x 0.5m Weight in Air 15860kg.

 

The mat was being overboarded 15m away from the 34” pipeline, the mattress and frame landed on the seabed 6m away from the 34” pipeline

  • Fleximat 6.4x3.0x0.5m 2.4 & 3.2te/m3 Concrete Mattress – Weight in Air 15860kg
  • Mattress Lift frame – 6.3x2.4m – Weight in Air 1.7te
  • Approx. 25m Crane wire
  • 0.5t Crane Block

25m Crane wire and 0.5te Crane Block safely recovered 13:50, 08/09/20.

 

Plan is to recover mattress but inspections into the current state of the mattress are required to determine a suitable recovery methodology.

 

A marine licence (ML/634) application has been submitted and approved by BEIS,  A variation to extend the marine licence to 14th November 2020 was approved by BEIS on 2nd November, and a second variation for extension to 31st January 2021 is now pending with BEIS.  This is due to scheduling delays due to poor weather.  The mattress frame and mattress will now be recovered by the Seven Falcon offshore support vessel.

 

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Exposed Pipelines - Scott Field



Pipelines in CNOOC’s Scott field have experienced upheaval bucking. As a result, in three locations, pipelines are now exposed and present a significant snagging hazard. Sea users are strongly advised to avoid these locations.


Detailed below, to avoid hazardous interaction with these sections of exposed pipeline, pending the execution of mitigation works.

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Rig Move - Askepott



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig Move - Maersk Inspirer



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Ocean Patriot



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Survey - Millom West & Calder Debris Clearance (Ref: 1165)



A 2 Day Gardline Millom West & Calder Debris Clearance Survey. Using Vessel MV Ocean Reliance Call Sign: HP6391 From the 15th January until 31st July 2021


Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Gardline Limited

MV Ocean Reliance

HP6391

N/A

15/01/2021 - 31/07/2021

For 2 Days

110

113

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Suspended Wellhead - 47/09b-5



Suspended Wellheads are not protected by 500m Safety Zones and are not required to have an overtrawlable protection structure.


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Suspended Wellhead - 16/06a-V2



Suspended Wellheads are not protected by 500m Safety Zones and are not required to have an overtrawlable protection structure.


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Suspended Wellhead - 16/02b-5



Suspended Wellheads are not protected by 500m Safety Zones and are not required to have an overtrawlable protection structure.


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Suspended Wellhead - 9/19b-29A



Suspended Wellheads are not protected by 500m Safety Zones and are not required to have an overtrawlable protection structure.


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Suspended Wellhead - 9/19b-29



Suspended Wellheads are not protected by 500m Safety Zones and are not required to have an overtrawlable protection structure.


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Suspended Wellhead - 9/19b-28z



Suspended Wellheads are not protected by 500m Safety Zones and are not required to have an overtrawlable protection structure.


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Suspended Wellhead - 9/19b-28



Suspended Wellheads are not protected by 500m Safety Zones and are not required to have an overtrawlable protection structure.


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Rig Movement - Paul B Lloyd Junior



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 - Glengorm Appraisal Campaign



The Borr Prospector 5 Heavy Duty Jack Up Rig will be positioned at the Glengorm South appraisal well location 22/26d-C.


The Borr Prospector 5 Heavy Duty Jack Up Rig will be positioned at the Glengorm South appraisal well location 22/26d-C.The rig will remain on location for approximately 216 days before departing to the second appraisal well location on Glengorm, well 22/21c-C.

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Rig - West Mira



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Valaris 123



Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Dropped Large Anchor



A large anchor has been dropped to the seabed by the fishing vessel 'Benarkle' (PD400). The anchor is approximately 3nm SSE of the Ninian South platform.


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Wet Storage of Caisson Sections - Bruce 500m Safety Zone



Caisson Wet Storage Location


The wet storage area will, when complete, consist of eight by one tonne gabions with two sections of redundant caisson resting on them. The two caisson sections are 20 metres and 18.5 meters in length weighing 18.4 tonnes and 10.3 tonnes respectively. Six by one tonne gabions were placed on the seabed with the 20 meter section of caisson resting atop of them on the 12th of June 2020. The date when the second 18.5 meter section of caisson will be position in the wet storage area has not yet been determined. 

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Dropped Anchor



Trawler J. Bergvoll Call Sign: LLAJ had come fast to an anchor in Position: 61°32.500'N 001°33.200'E and was dropped in Position: 61°30.371'N 001°40.812'E . Trawl damaged.


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Drilling - Noble Sam Hartley Golden Eagle Infill



Noble Sam Hartley HDJU undertaking infill drilling from the Golden Eagle platform.


The Noble Sam Hartley will be positioned by wellhead platform 'W' from August 2020 for up to 1 year. The Noble Sam Hartley has three jack-up legs with spud cans to support and stabilise the rig on the seabed and is held in position by a 4-anchor mooring spread.  Once the rig is in position, the anchors and chains will be removed.

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Fishing Hazard



Details of fishing hazard


A fishing vessel had to release a large clump of concrete back to the sea bed after having become snagged. The concrete clump could pose further risk to fishermen. The lump had broken into two parts.

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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

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Plugged and Abandoned Well : Sween



Sween UKCS 3/30 : Abandoned Wellhead (3/30-7)


No overtrawlability trial done yet, rough ground may be experienced.

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MacCulloch Area – Location of Donan (Dumbaton/GP3) Gas Export Tie-In Skid



Post decommissioning of the MacCulloch FPSO / Field in UKCS Block 15/24, a Guard Vessel is no longer in position at the location of the Tie-In Skid at MacCulloch 


After the decommissioning of the MacCulloch FPSO / Field in UKCS Block 15/24, a Guard Vessel is no longer in position. 

 

The Donan (Dumbarton) Field, located in UKCS Block 15/20, has an out of use Gas Export pipeline (PL2324) which is still connected to a Tie-In Skid located within the previous MacCulloch subsea 500m zone. 

 

Please be aware that this subsea Tie-In Skid remains in place at this location.  The structure has been notified and recorded on the NDR / FishSafe websites since 2006/07, but has been previously monitored by the guard vessel.

 

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Plugged and Abandoned Well : Balvenie



Balvenie UKCS 3/14: Abandoned Wellhead (3/14d-18)


No overtrawlability trial done yet, rough ground may be experienced.

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Plugged and Abandoned Well : Alwyn South



Alwyn South UKCS 3/9 : Abandoned Wellhead (3/9a-11)


No overtrawlability trial done yet, rough ground may be experienced.

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Freespans - Breagh Pipelines



Two freespans have been identified on the 20” gas export line (PL2768). Please exercise caution in this area.


Start Position End Position

Length (m)

Height  (m)

54°36.952'N 00°14.608'E 54°36.952'N 00°14.599'E 23.15 1.00
54°39.576'N 00°49.814'W 54°39.577'N 00°49.827'W 30.37 1.00

 

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Pipeline Span - PL3088, Cygnus Field



The PL3088 Cygnus Export Pipeline Span located ~21km South West of Neptune’s Cygnus Alpha Complex.


The PL3088 Cygnus Export Pipeline Span located ~21km South West of Neptune’s Cygnus Alpha Complex, as reported during the 2019 pipeline inspection campaign. The 29m span length and 0.26m span depth shown below could present a Hazard to Fishing.

 

Start Position End Position Length (m) Height (m)
54º27.672’N   02º01.612’E 54º27.664’N   02º01.589’E 29m 0.26m

 

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Breagh Pipelines - Exposed Fibre Optic Cable



The Breagh fibre optic cable (PL2770) is exposed on the seabed along various stages of the route between Redcar and the Breagh A platform.


A scallop dredger became snagged on an exposed section of the fibre optic cable in June 2019 causing serious damage to the fibre optic cable and subsequently had to abandon retrieval of his gear for safety reasons.  This notification is made to the fishermen, operating between Redcar and the Breagh A platform, to be advised that the fibre optic cable represents a serious snag risk to both scallop dredgers and static gear fishing in the vicinity of the line.

 

Fishermen are advised to stay away from the line to avoid the risk of becoming snagged on the unburied sections of cable.

 

Breagh Alpha Platform 54°35.693'N 000°25.926'E
IP1 54°36.372'N 000°24.471'E
IP2 54°37.462'N 000°06.365'W
IP3 54°38.642'N 000°40.856'W
IP4 54°39.893'N 000°55.992'W
IP5 54°37.757'N 001°04.765'W

 

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