Offshorenieuws

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.

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 has completed surveys at B-Blocks fields, Caledonia,  Nelson & Huntington. The vessel is currently located in the Catcher Area.

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

This safety zone may be new, or an amendment to an existing zone. It may also replace a safety zone in place around a platform, or other surface structure for the purposes of decommissioning.

Your FishSAFE Information will be updated in the next release.

This safety zone may be new, or an amendment to an existing zone. It may also replace a safety zone in place around a platform, or other surface structure for the purposes of decommissioning.

Your FishSAFE Information will be updated in the next release.

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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.

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 Services 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.)

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.)

The USV will be mobilised from Royal Norfolk & Suffolk Yacht Club, Lowestoft where it will transit to/from the area of operation. During the operation the USV will be performing a Hydrographic Survey of the area shown below

A support vessel “WM Poseidon” will escort the USV throughout the operations from the harbour entrance and will then continue transiting towards the survey site until the area is safe & clear of hazards.

It is requested that other vessels remain clear, so far as is practicable, during transit & survey operations.

Although the vessel is uncrewed, it is managed throughout the 24hour operation piloted remotely using 360 degree cameras and other navigational aids.

Vessel Details:

• Name:       X-09 UNCREWED
• MMSI:        232027632
• Length:      4.5m
• Beam:       2.2m
• Speed:       3.5kts
• Draught:   1.0m

Tonnage:  750kg

The USV sends real time images and situational awareness data over satellite to a team of operators keeping watch and controlling the vessel remotely 24/7. Seafarers are asked to avoid contact with the vessel and be aware of the operational area during this perio

The ERDA will depart from the Amethyst C1D installation (UKCS 47/14) on 3rd July 2021 (earliest).

Please note: Amethyst C1D Jacket will remain in-situ with navigational aids installed on the jacket legs.

The ERDA will sail to Sagro Yard, Vlissingen in the Netherlands.

The journey is anticipated to take approximately 3 days, with the Jack-Up vessel due on location on 6th July 2021 (at the earliest).

Location co-ordinates (WGS84)

Amethyst C1D Platform Lat: 53° 38' 41.7738’ N Long: 00° 36' 08.2471"E

Sagro Yard, Netherlands: Lat: 51° 27.32’ N Long: 03°  40.33’ E

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.

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.

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The Seven Atlantic DSV will be mobilising to the Balmoral field on the 18th June for approximately three weeks to conduct preparatory works in preparation to remove the mid-water arches and rise bases. Additionally, the DSV will conduct diving works at the Nicol location. The vessel will mobilise and demobilise in Peterhead.

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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).

The drilling operation will be carried out by Noble Hans Deul drilling rig.   

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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 in June for planned rig (West Hercules) arrival in July.

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

The Geotechnical Survey is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The Survey is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The Geotechnical Survey will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate 17km to the northeast at a location over the subsea Tweedsmuir manifold. The survey will commence between 08/08/2021 and 19/08/2021 and is scheduled to take up to two days, depending on weather. 

Following this survey, the vessel will continue to carry out a subsequent Geotechnical  Survey from the Buchan location to Sandford Bay. This is the subject of a separate notice.  

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during survey activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy seabed analysis equipment and will carry out seabed coring / sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

The Boulton HM 44/22b-H1X development well position is shown on the map. Throughout well abandonment operations there will be a dedicated ERRV on location monitoring the surrounding sea area.

Seven Atlantic DSV – DC2 Bundle XT Tie-Ins (Subsea 7) Penguins Redevelopment Project - Infield 05/05/21 – Depart Field 23/05/21

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.

Seven Atlantic DSV (Subsea 7) Gas Export & Tybalt Tie-ins - Penguins Redevelopment Project - Infield 03/05/21 – Depart Field 20/05/21

• 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 11/06/21 – Depart Field 17/08/21

• 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)

Seven Kestrel - (Subsea 7) Penguins Redevelopment Project - Infield 08/06/21 - Depart Field 22/06/21

• Seabed Prep (New Flowbases) and PAN-N Tie-in
• Complete DC7 Bundle Tie-In

DEME Rockdump Vessel – Rockdumping - Penguins Redevelopment Project - Infield 21/06/21 – Depart Field 24/06/21

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

The Geophysical Survey is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The Survey is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The Geophysical Survey will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate 27km to the south at a location over the Forties Pipeline. The survey will commence between 07/07/2021 and 11/07/2021 and is scheduled to take up to three days, depending on weather. 

Following this survey, the vessel will continue to carry out a subsequent Geophysical Survey from the Buchan location to the SAGE pipeline. This is the subject of a separate notice.  

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during survey activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy sonar and seabed sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

The Geophysical Survey is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The Survey is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The Geophysical Survey will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate 17km to the northeast at a location over the subsea Tweedsmuir manifold. The survey will commence between 13/07/2021 and 18/07/21 and is scheduled to take up to two days, depending on weather. 

Following this survey, the vessel will continue to carry out a subsequent Geophysical Survey from the Buchan location to Sandsford Bay, close to Peterhead. This is the subject of a separate notice.  

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during survey activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy sonar and seabed sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

The Geotechnical Survey is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The Survey is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The Geophysical Survey will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate 27km to the south at a location over the Forties Pipeline. The survey will commence between 03/08/21 and 13/08/21 and is scheduled to take up to three days, depending on weather. 

Following this survey, the vessel will continue to carry out a subsequent Geotechnical Survey from the Buchan location to the SAGE pipeline. This is the subject of a separate notice.  

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during survey activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy seabed analysis and coring / sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

The Geotechnical physical Survey is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The Survey is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The Geotechnical Survey will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate 38km to the northwest at a location over the SAGE Pipeline. The survey will commence between 08/08/2021 and 19/08/2021 and is scheduled to take up to three days, depending on weather. 

Following this survey, the vessel will continue to carry out a subsequent Geotechnical  Survey from the Buchan location to the location of the subsea Tweedsmuir manifold. This is the subject of a separate notice.  

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during survey activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy seabed analysis equipment and will carry out seabed coring / sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

The EBS is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The EBS is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the location of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The EBS will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate 38km roughly WNW at a location over the SAGE Pipeline. The survey will commence around the 25/06/21 and is scheduled to take up to two and a half days, depending on weather. 

Following this survey, the vessel will continue to carry out a subsequent EBS from the Buchan location to the Tweedsmuir manifold. This is the subject of a separate notice.  

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during EBS activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy subsea camera and sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

The Geophysical Survey is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The Survey is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The Geophysical Survey will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate 38km roughly to the WNW at a location over the SAGE Pipeline. The survey will commence between 09/07/21 and 14/07/21 and is scheduled to take up to four days, depending on weather. 

Following this survey, the vessel will continue to carry out a subsequent Geophysical Survey from the Buchan location to the location of the subsea Tweedsmuir manifold. This is the subject of a separate notice.  

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during survey activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy sonar and seabed sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

The EBS is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The EBS is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the location of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The EBS will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate 27km to the south at a location over the Forties Pipeline. The survey will commence on 23/6/2021 and is scheduled to take up to two days, depending on weather. 

Following this survey, the vessel will continue to carry out a subsequent EBS from the Buchan location to the SAGE pipeline. This is the subject of a separate notice.  

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximtely 500m)(COLREGs Rule 16 & 18) from the areas identified during EBS activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy subsea camera and sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

The EBS is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The EBS is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The EBS will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate 17km to the northeast at a location over the subsea Tweedsmuir ManifoldForties Pipeline. The survey will commence around 27 June 2021 and is scheduled to take up to one-and-a-half days, depending on weather. 

Following this survey, the vessel will continue to carry out a subsequent EBS from the Buchan location to the Sandford Bay location,, close to Peterhead. This is the subject of a separate notice.  

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during EBS activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy subsea camera and sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

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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).  The Valaris 123  re-commenced drilling operations at the NE well on 19th May 2021.

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

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Pre-lay moorings to be installed for the West Hercules from earliest 6th June. 

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

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

The rig repairs are almost complete and thus the Ocean Endeavor is due to return to the Arran North location around the 23rd May 2021.

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.

Please be advised that Repsol Sinopec Resources UK Limited (RSRUK) intend to carry out subsea removal & remediation works in the Buchan & Hannay fields during Q2/Q3 this year, commencing on the 1st June 2021.

The intention is to execute this works over two campaigns: •    Campaign 1 – mobilising 1st June for approximately 20 days  •    Campaign 2 – mobilising 10th August for 40 days

Summary of the Offshore Scope, in accordance with the approved decommissioning programme is: •    Rigid pipelines removal (13.5km); •    Flexible Pipelines / Umbilical removal (15.6km); •    Subsea structures removal (215Te); •    Rigid tie-in spool-pieces removal (67Te); •    Flexible jumpers/umbilical jumpers removal (0.47km); •    Deposits removal (866Te); •    Debris removal (five grid zones); •    Rigid pipelines & Umbilical Ends remediation (1.45km of remediation).

This infrastructure is contained with the Buchan & Hannay fields, with a large proportion of the works being focused around the Buchan template 500m subsea safety zone.  The coordinates for the area are:   A small part of the works (2-3 days) will take place the Forties Charlie end of the Buchan export pipeline, within the Forties Charlie 500m zone.

The work will be carried out using Construction Support Vessel’s (CSV), support by WROV.  

Pipeline Works Authorisation variation and supporting permits are currently in the approval process.  

The Works shall comprise the location of the following mobile installation:

The mobile drilling unit (MoDU) - PR5 (Prospector 5)

The Works shall be located at:

57 10' 05.97"N 01 05' 27.27"E

Quad/Block - 22/21c

Callisto ZM exploration well 49/22-6Z

53°14'31.96"N  2°23'16.54"E

Start Date: 25/05/21    End Date: 29/06/21

Throughout well abandonment operations there will be a dedicated ERRV on location monitoring the surrounding sea area.

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.

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.

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;

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

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

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

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

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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.

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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.

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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.

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

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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.

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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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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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.

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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)

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

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

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Details of Seabed - West Cluster

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

Details of Seabed - North East Cluster

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

Details of Seabed - Southern Cluster

Note: 30m pile is installed in this fast frame

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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.

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.

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. 

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.

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

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Significant free-spans have been identified along the PL1043 Dunbar to Alwyn pipeline : Please exercise caution in these areas

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

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.

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

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