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Environmental Monitoring Survey - Shearwater Field



Shell U.K. Limited plans to undertake a further Environmental Monitoring Survey over the Shearwater field within UKCS block 22/30b. The Shearwater field is located within the Central North Sea (CNS) ~230 km from the UK coastline and 26 km from the UK/Norwegian median line in a water depth of 90 metres.


Data will be acquired over the survey area using multi-beam echosounder (MBES), side scan sonar (SSS), and magnetic surveying equipment.

 

The monitoring survey operations will be conducted within a 2.5 km x 2.5 km area centred on the Shearwater A platform with a 6.5 km x 6.5 km Greater Working Area (GWA) to allow for turning. The survey will include up to 11 grab sample locations.

 

The Co-ordinates provided below are for the Greater Working Area (GWA)

See detailed map on our bulletin website

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Structure in situ - Leverett CAN



Leverett CAN-basic left in situ until it is recovered by a vessel in June 2024. Following the drilling of the Leverett appraisal well, the Transocean PBLJ and its anchors left the location on 14th February. The Leverett CAN-basic structure will remain in situ at the well location until it is recovered in June.


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Overtrawl Trials - Curlew B



The Westro PD20 will be used to complete Overtrawl Trials of the Curlew B 500m zone, as part of the field Decommissioning Programme. Vessel: Westro PD20 Dates the vessel will arrive in field / depart the field: Window 1st – 30th April. Expected duration 5-7days.


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Pipeline survey - Birgitta and Montrose platforms



Survey of pipeline route between Birgitta and ETAP and Birgitta and Montrose platforms. The proposed survey operations will be undertaken along the centre of the two routes, and within a 2km by 2km box surrounding the proposed Birgitta well locations. The greater working area (including line turns) is a 3km boundary surrounding the total survey area is anticipated to be approximately 208 km2


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Environmental Seabed Survey - Central North Sea



Shell UK Limited is planning to undertake geophysical and environmental site survey and pipeline route survey activities mainly within UKCS Blocks 29/4, 29/5, 29/9 and 29/10, located approximately 225 km east of Scotland. The pipeline route extends into UKCS Blocks 22/30 and 29/5. The purpose of the survey activities is to undertake an Environmental Baseline Survey and associated Habitats Assessment.


The site survey will be conducted over a 6 km x 6.1 km survey area with an 8 km x 8.1 km Greater Working Area (GWA). The pipeline survey corridor is 700 metres wide and the GWA is 2000 metres, 1000 metres either side of the pipeline route.

 

Data will be acquired over the survey area using a parametric sub-bottom profiler (SBP), multi-beam echosounder (MBES), side scan sonar (SSS), and magnetic surveying equipment.  The survey vessel will make line turns outside of the survey area but within the GWA. Seabed samples will also be collected over the site survey area, including pipeline route, and photographic monitoring will also be undertaken. The environmnetal survey is expected to take approximately 25 working days.

 

The Co-ordinates provide below are for the geater working area (GWA).

 

The Survey will be undertaken by the Fugro Searcher, Call sign C6EI5 and IMO Registration number 9504011.

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Verification Operations - UKCS Blocks 29/03c and 29/04c



As part of the Shell U.K. site and pipeline route seabed survey there is a requirement to undertake a verification operation within UKCS Blocks 29/03c and 29/04c. The anticipated duration of the verification operation is one day. For further details on the main survey refer to Notice "Site and Pipeline Route Environmental Seabed Survey - Central North Sea".


Data will be acquired over the survey area using a multi-beam echosounder (MBES) and side scan sonar (SSS) equipment. The survey equipment will be operated within the survey area. The survey vessel will make line turns outside of the main survey area but within the greater working area (GWA). The co-ordinates provided are for the GWA. 

 

The Survey will be undertaken by the MV Geo Ranger, Call sign PHHV and IMO Registration number 9885831.

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Rig - Seafox 7



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Subsea Recovery - Victoria Wellhead Protection Structure (block 49/17a)



Following wet store of the Victoria wellhead protection structure (WHPS) (area of approx. 25m x 25m), and on behalf of the Licence Operator (NEO Energy), the WHPS will remain in situ and now be recovered by Offshore Construction Vessel (name & call sign is TBC), during April 2024. (Further update will be provided later in Q1 2024). Guard vessel, GV Jacoba (call sign GCVA) will be on location during this time.


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Rig - Deepsea Nordkapp



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Valaris 120



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


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Rig - Prospector 1



This oil & gas drilling rig has moved to this new position. Rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Well Plugged and Abandoned - Hamilton North



It is planned that the 'Valaris' Rig will move from 'Lennox' to 'Hamilton North' for Well Plugged and Abandoned works.


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ROVSV Survey - PL1762 - 12nm to Sullom Voe



ROVSV Atlantis Dweller will be conducting pipeline survey along "PL1762" from the 12Nm limit to landfall at Sullom Voe.


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Clair CRX Geophysical Survey



Multi role Survey Vessel "Fugro Venturer" shall acquire geophysical survey and shallow geotechnical investigations south / southwest of Clair Ridge Platform as per the Greater Working Area.


Geophysical survey comprises the following plus transits from / to Aberdeen

1. AUV survey, whereby the AUV flies at around 15m above seabed along programmed lines and the vessel follows the same track above the AUV (10 days work including weather)

2. High res Seismic survey comprising a single streamer of 700m length towed at 3m depth and fitted with a tailbuoy with light and radar reflector (10 days work including weather)

3. Very high res Seismic Survey comprising 4 x 70m length streamers towed immediately behind the vessel, this work is mostly close to Clair Ridge Platform (10 days work including weather) 

4. After a Port Call in mid May the vessel will then acquire shallow Geotechnical CPT and Vibrocore sampling within the working area (approx 14 days work including weather)

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Geological, Topographical and Shallow Gas Hazards Survey - Bruce Infill Well



Serica Energy intends to conduct survey at the Bruce Field - The survey operations are to determine the seabed conditions at the well locations and identify any geological, topographical, shallow gas hazards or environmental conditions which could impair the satisfactory emplacement of a drilling rig at the defined locations.


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Wood Supplementary Valve Skid (SVS) Installation



The Wood Supplementary Valve Skid (SVS) workscope will be conducted over two phases in Q3 2023 and Q2 2024, an Isolation Valve Structure (IVS) was installed 11th August 2023 with an as laid position of (57°21'47.5"N 01°26'32.3"E). The SVS and adjoining spools will be installed between positions (57°21'48.4"N 01°26'32.8"E) and (57°21'47.8"N 01°26'31.7"E) over the period 30th March to 30th April 2024 with a DSV infield for approximately 2-3 weeks.


See attached files MON-SIV-GE-LY-00002-001_I01_1.pdf and MON-SS-GA-00009-003_C04_2.pdf which show the current status and details of the IVS and MON-SS-GA-00020-001_C01_1 - Wood Well Layout - Sheet 1.pdf which shows the proposed layout on completion of all works.  

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Environmental Survey Activities - Southern North Sea



Please be advised that Spirit Energy has contracted the Gardline - operated Ocean Geograph survey vessel to undertake an environmental baseline survey at the following sites in the southern North Sea. Ceres Well, UKCS block 47/09c-11; Eris Well, 47/08c-4 ; Seven Seas Well, 48/07c-13; and York Platform, 47/3a.


The survey will employ a range of geophysical and environmental surveying/sampling techniques.

 

The Ocean Geograph is scheduled to commence her mobilisation in Leith as soon as the 1st April 2024 and to commence surveying as soon as the 3rd April 2024.

 

The activities are scheduled to take approximately 10 days to complete, comprising 2 days of operational surveying at each site, and an allowance of 2 days weather downtime / time spent in-field transiting.

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Seismic survey - East Irish Sea



Spirit Energy has contracted the Shearwater GeoServices - operated SW Amundsen survey vessel to conduct a high - resolution 3D seismic survey of the South Morecambe and North Morecambe gas fields, located in UKCS blocks 110/2, 110/3, 110/7, 110/8 and 113/27 of the east Irish Sea.


The vessel is scheduled to commence mobilisation in Liverpool port as soon as 15th April 2024, to commence survey activities as soon as 20th April 2024, and to complete survey activities approximately 30 days later (including an allowance for weather downtime).

 

Note that the inner area shown is where the seismic survey data acquistion itself will be undertaken. The outer area is where line turns, line run-out, and soft start will take place. This outer area will also allow for the deployment and retrieval of streamers, and provide space for weather standby.

See detailed map on our bulletin website

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Ground Moorings - Schiehallion North West



Eight mooring ground chain and pennant sections remain in place until further notice, at the below noted locations in the Schiehallion NW field. There are no surface buoys or mid-water sections.


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Pre-Installation Pipeline Route Survey - East Irish Sea



Please be advised that Spirit Energy has contracted the Gardline - operated Kommandor multi-role survey vessel to undertake a pre-pipeline installation route survey of a corridor between the west coast of Walney Island, Barrow-in-Furness and the DP1 platform; and the DP1 platform and the DPPA-1 platform, east Irish Sea. DP1 and DPPA-1 are located in the South Morecambe, and the North Morecambe gas fields respectively.


The survey, which will traverse portions of UKCS blocks 113/29, 110/2, 110/3, 110/4 and 110/8 will employ a range of geotechnical, geophysical, and environmental surveying/sampling techniques.

 

The activities are scheduled to take approximately 28 days to complete comprising 22 days of operational surveying, an allowance of 5 days weather downtime, and 1 day spent in-field transiting.

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Equipment trials - UKCS Block 13/20



The Fugro Venturer will test 3DUHR and Autonomous Underwater Vehicle (AUV) equipment in UKCS Block 13/20. Testing will comprises data acquisition along several parallel 500m lines spaced 15 m apart within a 4 km x 4 km area. The equipment being tested will comprise; Autonomous Underwater Vehicle (AUV) and sparker seismic source with 4 parallel Streamers up to 90m behind vessel. Testing will take place for up to 10 days between 27th March and 10th April 2024


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Trawl Sweep - Don Decommissioning



Trawler Westro PD20 conducting an overtrawl survey of recently decommissioned subsea oil field, Don.


Trawler Westro PD20 will be making a verification sweep of the former 500m zone at Don subsea oil field to confirm that area is suitable for normal fishing operations to proceed following decommissioning

See detailed map on our bulletin website

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Rig - Deepsea Aberdeen



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Linus



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Geophysical Survey - Evelyn



Petrofac to undertake a geophysical survey in the Evelyn field using the Ocean Observer, lasting approximately 2 days.


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Environmental Sampling - Gannet E Field



Petrofac will undertake environmental sampling in the Gannet E field using the Ocean Observer Petrofac, lasting approximately two days.


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Site and Pipeline Route Survey - Belinda



Pipeline, umbilical route and rig site survey of Belinda location, including 2DHR, ahead of drilling operations. Petrofac will be undertaking a survey using the Gardline Ocean Observer vessel starting on 1st March and lasting approximately 17 days.


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Subsea Field Decommissioning - Arthur Field



The Arthur field's three standalone wells will be decommissioned between April and July 2024. The HAEVA Jackup Barge will be on location for the duration of the project, along with one Diving Support Vessel (DSV).


Arthur consists of three standalone wells (A1, A2 and A3) and a manifold. The wells are up to 3km apart, and the manifold is located close to the A1 well. 

 

The HAEVA will move from one well to the next as it completes the plug and abandonment of the well.  The DSV will be utilised to support the pipeline flushing and will move between wells as per operational requirements.

 

The current planned sequence HAEVA rig move and positioning is as follows:

A2 - 22 April 2024

A3 - 28 May 2024

A1 - 14 July 2024

END - 21 July 2024

 

See detailed map on our bulletin website

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Drilling Activity - COSL Innovator at Bittern B1 - ST#1



The COSL Innovator (semi-submersible) will be conducting drilling operations in the Bittern field on the B1 - ST#1 well. This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


Rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone. Location of anchors and COSL Innovator have been included. 

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Tern - Subsea Infrastructure Disconnection



Dive Support Vessel (DSV) work shall be ongoing at and around Tern Alpha platform and satellite fields. The DSV shall be carrying out works to flush and disconnect subsea pipelines at Kestrel Falcon, Hudson and Cladhan subsea fields.


Work shall commence at or proximate to the following locations:

 

Location

Northing

Easting

Tern Alpha

 

 

Platform

61° 16’ 31.82”

00° 55’ 03.83”

Kestrel

 

 

P1 XT

61° 18’ 34.47”

01° 02’ 30.64”

P2 XT

61° 18’ 35.25”

01° 02’ 31.83”

W1 XT

61° 18’ 35.67”

01° 02’ 34.70”

Falcon

 

 

P1 XT

61° 19’ 50.04”

00° 59’ 28.06”

Hudson

 

 

Hudson Manifold

61° 15’ 08.28”

00° 44’ 01.58”

L1 XT

61° 15’ 37.14”

00° 42’ 26.83”

L2 XT

61° 15’ 36.73”

00° 42’ 26.38”

Cladhan

 

 

Cladhan Manifold

61° 08’ 52.59”

00° 47’ 09.03”

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Dumbarton Field - Diving Ops - Installation and IRM works



The Deep Discoverer will be conducting P1 well reconnect activities and GPIII related IRM workscopes within the Dumbarton field.


NEO will be using the Deep Discoverer DSV to conduct tie in and commissioning activities at the P1 well to the existing subsea manifold which will involve the Installation of a new flexible from P1 well to Orifice Valve Skid (OVS), install and test tie-in spool from Valve Skid to Orifice Valve, install and test tie-in spool from Orifice Valve to P1 flexible jumper, install and test Orifice Valve at OVS. The DSV will also install mechanical protection for spools, flexible, and existing controls jumpers.

The DSV will also carry out GPIII IRM works which will include the SCM Changeout at P15.

See detailed map on our bulletin website

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Rig move - Irish Sea Pioneer



ISP Rig Move Notification. Planned Rig Move from Douglas Wellhead platform(Liverpool Bay) to Lennox Platform ( Liverpool Bay)


This oil & gas drilling rig is moving to this new position. Rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

See detailed map on our bulletin website

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Surveys at the UMC and Pelican Field



Surveys at the UMC and in the Pelican Field are proposed to comprise of geophysical surveys, with a survey area expanding over 4.12 km x 4.10 km for the Pelican Field and 4.16 km x 4.03 km for the UMC. The surveys will acquire SBES (single beam echosounder), MBES (multibeam echosounder), HMP (hull mounted sub bottom profiler), SSS (side scan sonar), and magnetometer data.


Surveys at the UMC and in the Pelican Field are proposed to comprise of geophysical surveys, with a survey area expanding over 4.12 km x 4.10 km for the Pelican Field (Figure 2.1) and 4.16 km x 4.03 km for the UMC.

Geophysical data acquisition will include SBES, MBES, HMP, SSS, and magnetometer. The acquisition of geophysical surveys in the NNS is expected to commence in Q2 of 2024, and will include:

A total mobilisation of 24 h;

A total geophysical acquisition of 20 days, based on:-

          UMC including approx. 208 survey kms / 53 lines turns / 2.6 days

          Hudson including approx. 339 survey kms / 65 lines turns / 3.8 days

          Otter including approx. 208 survey kms / 53 lines turns / 2.6 days

          Cladhad including approx. 208 survey kms / 53 line turns / 2.6 days

          Pelican including approx. 208 survey kms / 53 line turns / 2.6 days

          Falcon and Kestrel approx. 548.6 survey kms / 83 line turns / 5.8 days

and A total demobilisation of 12 hours.

The line spacing for the Pelican Field and the UMC will be 100 m for main lines (with additional lines through well locations) and 400 m for cross lines.

The seabed and shallow soils survey areas have been designed to allow a minimum of 2 km distance away from any well location in any direction.

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Survey at Otter Field



Proposed geophysical surveys of the Otter Field will cover a survey area of 4.02 km x 4.01 km.


Proposed geophysical surveys of the Otter Field will cover a survey area of 4.02 km x 4.01 km.

The surveys will acquire SBES, MBES, HMP, SSS, and magnetometer data. The acquisition of geophysical data in the NNS is expected to commence in Q2 of 2024, and will include:

     A total mobilisation of 24 h;

     A total geophysical acquisition of 20 days, based on

               UMC including approx. 208 survey kms/53 lines turns/2.6 days

               Hudson including approx. 339 surveys kms/65 lines turns/3.8 days

               Otter including approx. 208 survey kms/53 lines turns/2.6 days

               Cladhad including approx. 208 survey kms/53 line turns/2.6 days

               Pelican including approx. 208 survey kms/53 line turns/2.6 days

               Falcon and Kestrel approx. 548.6 survey kms/83 line turns/5.8 days;

     A total demobilisation of 12 hours.

The line spacing for the Otter Field will be 100 m for main lines (with additional lines through well locations) and 400 m for cross lines. The seabed and shallow soils survey areas have been designed to allow a minimum of 2 km distance away from any well location in any direction.

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Survey at Hudson, Falcon, Kestrel and Cladhan



Surveys in the Hudson Field, Falcon Field, Kestrel Field and Cladhan Field are proposed to comprise geophysical surveys, with a survey area expanding over 5.46 km x 4.86 km for the Hudson Field, 6.80 km x 6.30 km for the Falcon Field and Kestrel Field, and 4.04 km x 4.03 km for the Cladhan Field.


Surveys in the Hudson Field, Falcon Field, Kestrel Field and Cladhan Field are proposed to comprise geophysical surveys, with a survey area expanding over 5.46 km x 4.86 km for the Hudson Field, 6.80 km x 6.30 km for the Falcon Field and Kestrel Field, and 4.04 km x 4.03 km for the Cladhan Field. 

 

These surveys in the Hudson, Falcon, Kestrel and Cladhan Fields, are part of a wider geophysical surveys campaign in the NNS. Geophysical data acquisition will include SBES, MBES, HMP, SSS, and magnetometer. The acquisition of geophysical surveys in the NNS is expected to commence in Q2 of 2024, and will include in total:

     A total mobilisation of 24 hours;

     A total geophysical acquisition of 20 days, based on:

               Underwater Manifold Centre (UMC) including approx. 208 survey kms / 53 lines turns / 2.6 days

               Hudson including approx. 339 survey kms / 65 lines turns / 3.8 days

               Otter including approx. 208 survey kms / 53 lines turns / 2.6 days

               Cladhan including approx. 208 survey kms / 53 line turns / 2.6 days

               Pelican including approx. 208 survey kms / 53 line turns / 2.6 days

               Falcon and Kestrel approx. 548.6 survey kms / 83 line turns / 5.8 days; and

     A total demobilisation of 12 hours.

The line spacing for the Hudson Field, Falcon Field and Kestrel Field, and Cladhan Field will be 100 m for main lines (with additional lines through well locations), and 400 m for cross lines. The seabed and shallow soils survey areas have been designed to allow a minimum of 2 km distance away from any well location, in any direction.

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Geotechnical survey in-situ Cone Penetration Testing block 42/14



Geotechnical survey in-situ Cone Penetration Testing block 42/14 using MV Geoquip Elena.


Site investigation to acquire adequate geotechnical data that will allow for reporting of soil parameters supporting a typical spud can penetration analysis. Data will be collected in-situ by performing Cone Penetration Test (CPT) testing at up to three locations, down to a depth of 30m, situated within 100m of the proposed well location. The MV Geoquip Elena vessel is anticipated to be working on location for up to four days.

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SEAL Nearshore Bacton Inspections 2024



The vessel Titan Endeavor (Call Sign 2ELT9) will be carrying out Inspection operations on the SEAL Pipeline PL1570 at the Bacton nearshore area, as noted below: Duration is ONLY expected to be approx. 2 Days – but a suitable “Weather Window” will be required. Dates = suitable opportunity between 15th February to 15th March 2024. Work not completed yet, Project Dates Extended to : 15th April 2024


The vessel Titan Endeavor (Call Sign 2ELT9) will be carrying out Inspection operations on the SEAL Pipeline PL1570 at the Bacton nearshore area, as noted below:

Duration is ONLY expected to be approx. 2 Days – but a suitable “Weather Window” will be required

Dates = suitable opportunity between 15th February to 15th March 2024

 

Work not completed yet, Project Dates Extended to : 15th April 2024  

 

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Pipeline Installation - Buzzard Northern Terrace Manifold (NTM)



The Seven Kestrel DSV will be conducting pipeline installation operations within the 500m zone of the Buzzard Northern Terrace Manifold (NTM) to tie-in and commission two new subsea production wells.


CNOOC plan to conduct pipeline tie-in and commissioning activities at the Buzzard NTM which will involve tying in two new production wells  to the existing subsea manifold.  As part of this scope, new production and gas lift spools, as well as a control umbilical (consisting of a bundle of a hydraulic flying lead and two electrical flying leads) will be installed between each of the production wells to the NTM.  Activities will also include commissioning of the Xmas Trees (XTs) for the wells. The surface laid spool pieces and control umbilical's will be installed and tied in from the Seven Kestrel DSV DSV.  The DSV will also install concrete mattresses.  All work scopes will be conducted by divers and all operational activities will take place within the 500 m exclusion zone of the Buzzard NTM.

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Talbot & Affleck Developments - Subsea Construction & Pipelay Activities



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


Talbot Field Devleopment Project

 

Subsea activities on Talbot will commence circa 24th March 2024 with diving preparatory works within the Judy Platform 500m safety zone.  This will be followed by the installation of a new 15km long 12”/18” Pipe-In-Pipe Pipeline and Electro Hydraulic Chemical (EHC) Control Umbilical between the Talbot Field and the Judy Platform.  A Survey Support Vessel (SUV) will be used to support pipeline and umbilical lay operations as well as performing the pre-commissioning activities for the newly installed pipeline.  A Trenching Support Vessel (TSV) will be used to plough and backfill the pipeline and umbilical.  On completion of pipelay and trenching activities, a rock dump vessel will perform spot rock dump activities along the pipeline and umbilical route and at the existing pipeline crossing locations. 

 

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

 

A Dive Support Vessel (DSV) will perform the tie-ins of the newly installed pipeline and umbilical at the Talbot DC1 Manifold location and within Judy Platform 500m safety zone. The DSV will also support the commissioning of the pipeline and umbilical in preparation for Talbot first oil in September 2024. 

 

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

 

Affleck Field Developmentv Project 

 

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

 

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

 

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

 

The earliest start date for Affleck operations to commence is 18th April 2024 with the operations expected to last until the end of September.

 

Key Co-ordinates

 

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

 

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

 

Vessel Details

 

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

 

Operation

Vessel

Call Sign

Dates in Field

Dive Support Vessel (DSV) – Talbot Preparatory Works

Deep Arctic

C6XW3

March / April

Survey Support Vessel (SUV)

Olympic Triton

LADM3

April / May / June

Talbot & Affleck Pipeline Installation Vessel

Deep Energy

C6YL2

April / May

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

North Sea Atlantic

LAYS7

May

Affleck Umbilical Installation Vessel

Deep Energy

C6YL2

July / August

Talbot & Affleck Pipeline Trenching Vessel (TSV)

Normand Drott

LDRO

May / June

Affleck Umbilical Trenching Vessel (TSV)

Grand Canyon III

LACJ8

August

Dive Support Vessel (DSV)

Deep Arctic

C6XW3

July / Aug / Sept

Rockdump Vessel (FFPV) Pipeline

Nordnes (TBA)

PHOG (TBA)

June

Rockdump Vessel (FFPV) Umbilical

Nordnes (TBA)

PHOG (TBA)

September

Guard vessels

Various

Various

April to Sept

 

 

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Rig - Scarabeo 8



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Noble Integrator



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Noble Innovator



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Well Plug and Abandonment activities - Sean Romeo 500 MZ



Prospector 1 to move and locate on the Sean Romeo Block 49/25 for Well Plug and abandonment activities for approx 90 days


The Prospector 1 is a Non-Production Installation (MODU jack-up) which will be cantilevered over the Sean Romeo well bay.

It will be on location approximately 90 days during which time ONE-Dyas will be utilising the Prospector 1 for accommodation and completing plugging & abandoning of the wells on the SEAN Romeo platform. It will be towed to the location by three tugs, pulled into final position on anchors and jacked up (air gapped) as per the rig move and positioning program. A dedicated Emergency Response & Rescue Vessel (ERRV) will guard the 500 m safety zone. The Prospector 1 is equipped with navigational aids and lighting, AIS, radio and 24/7 manned radio room. To prevent confusion it is proposed that Romeo Navigation aids will be turned off, and Prospector 1 navigation aids will be used.  

See detailed map on our bulletin website

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Geophysical Survey - Abbey, Baker and York



The collection of data (to include 2DHR seismic, SBP pinger, SBP sparker, multi beam, echo-sounder, sidescan sonar (SSS) over an area of 2 by 2 km at Baker . An environmental baseline survey will also be conducted within this area, comprising a visual using a ROV / AUV, drop cameras and grab sampling. The wider greater working area, within which the survey vessel will maneuver during line turns and during equipment deployment and recovery, is anticipated to be 36 km2


The scope at the Abbey- York pipeline involves the collection of geophysical data, sub bottom profiler (SBP), multi beam, echo-sounder, sidescan sonar (SSS) over 11 parallel lines with 50 m spacing to allow for 100% overlap, alongside 600 m cross lines at 2 km spacing. Environmental sampling (with 4 replicates) will also be conducted within this area at 1 km spacing along the 8 km pipeline route. Intelligent sampling will also be undertaken at the proposed pipeline route, however this will be disclosed further by the environmental contractor. The proposed pipeline area, within which the survey vessel will manoeuvre during line turns and during equipment deployment and recovery, is anticipated to be 33 km2 (kilometres squared). The Baker survey areas and greater working area, alongside the Abbey Drill Centre and York Platform are located in UKCS Block 47/3. The Baker survey areas (including the greater working area) is located approximately 34 km northeast of Withernsea on the Yorkshire coastline at its closest point and 152 km from the UK / Netherlands transboundary line. The proposed Abbey-York pipeline is located 28 km northeast of the UK coastline and 150 km from the UK/ Netherlands transboundary line.   

See detailed map on our bulletin website

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Rig - Noble Resolve



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Light Well Intervention Vessel Project - Bruce Field



Serica Energy (UK) Ltd (Serica) are looking to perform a well intervention campaign on the Bruce phase two Western Area Development (WAD) and Keith gas condensate fields. It is planned that using the Helix Well Enhancer Light Well Intervention Vessel (LWIV) will perform well intervention services at wells Bruce WAD 9/08a-B6(M5), (possibly) 9/08aB3Z(M4) and Keith 9/8a-K01(K1) (formerly 9/8a14).


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Seabed Survey - Leman G Platform



The Fugro Venturer will execute a seabed survey around the Leman G platform with towed sensors. Between the 15th of march and early April, the Fugro Venturer will be on location around the Leman G platform for the execution of a seabed survey. The Venturer will be towing sonar equipment up to 500m behind the vessel. The vessel will be restricted in its movements


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Open WHPS roof panels at the North West Bell field



The roof panels on the Wellhead Protection Structure (WHPS) at the North West Bell location are currently in an open position. The WHPS is within the existing 500m zone.


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Seismic survey - Block 42/14 Crosgan



ONE-Dyas UK Limited is planning a seismic survey covering a 2 km by 2 km block in block 42/14 using the Guardline MV Ocean Reliance. Mobilisation delayed until 6 March 2024.


One-Dyas is proposing to undertake a site survey at the Crosgan location in Block 42/14 using the MV Ocean Reliance. The scope of the survey involves the collection of data (2DHR seismic, UHR seismic, SBP pinger, multi beam and echo-sounder, SSS and magnetometer) over a 2km by 2 km area.  An environmental baseline survey will also be conducted at a later date using video and stills camera systems and Mini Hamon grab samplers / Box corer. The duration of the survey operations is up to 2 days. The greater working area, within which the survey vessel will manoeuvre during line turns and during equipment deployment and recovery, covers approximately 144 square kilometres (km2) and lies within UKCS Blocks 42/14, 42/15, 42/10 and 42/9. The greater working area is located approximately 83 km north east of the North Yorkshire coastline and 138 km to the west of the UK/Netherlands median line (Figure 1.1).

See detailed map on our bulletin website

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Subsea Well Plugging & Abandonment - Banff, Kyle, Strathspey, Lyell, Ninian and Columba E Fields



Vessel-based subsea well plugging and abandonment, including the use of explosives for wellhead conductor severance, and recovery of wellheads from the seabed. Activities are to be carried out across the Banff, Kyle, Strathspey, Lyell, Ninian and Columba E fields.


CSV / AHV Island Valiant (c/s JWMY) is planned to mobilise on 26th March for a 65-day campaign.

See detailed map on our bulletin website

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Subsea Decommissioning - Banff & Kyle



DeepOcean vessels will be completing subsea decommissioning activities, including rock placement, at the Banff and Kyle fields, adjacent to the decommissioned Curlew field and adjacent to the CATS T5 location. Scopes are to be carried out mainly inside existing subsea 500m Safety Zones, but some scopes will be completed out-with these zones.


CSV Normand Jarstein is due to mobilise on 28th March for a 38-day campaign of decommissioning work.

CSV Dina Star is due to mobilise on 8th May for a 23-day campaign

CSV Normand Jarstein is due to mobilise on 16th July for a 61-day campaign

CSV Edda Freya is due to mobilise on 25th September for a 5-day campaign

FPV Stornes is due to mobilise for subsea rock installation mid-April for a 14-day campaign, and again in October for a 14-day campaign.

See detailed map on our bulletin website

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Well Plug & Abandon activities - Juliet/ Minke & Orca



Carry out DSV barrier testing and frame removal at Juliet and Minke locations in March 2024. Carry out DSV dredging activities at Orca Well in March 2024. Carry out Rig P&A activities at Juliet/ Minke & Orca Wells from April through to September 2024.


DSV Boka Polaris to arrive at the Juliet and Minke locations to prove barriers prior to rig arrival.

WHPS framework to be cut off by DSV at the Juliet and Minke locations.

Open hole dredging activities to be carried out at Orca Well in preparation for rig arrival.

 

Drill Rig "Well Safe Protector" to carry out P&A activities at Julient/ Minke and Orca locations.

See detailed map on our bulletin website

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Safety Zone position: "Clair Tee, Magnus EOR Development" (CORRECTION)



Please note that FishSAFE information for plotter systems and FishSAFE Alarm Units for the "Clair Tee, Magnus EOR Development" Safety Zone IS CORRECT. A notice from Wednesday 1 November 2023 stating otherwise, has been found to be incorrect. To confirm, the information on FishSAFE is correct and the centre of the safety zone is as below:


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Freespan - 4" Meg Bacton - Leman AP



High Freespan. Max 13m long freespan with height exceeding 1.6m


Please check your Fishsafe plotter data

See detailed map on our bulletin website

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High pipeline freespan - 4" Meg Bacton



High pipeline freespan maximum 50m long freespan with excessive height of 1.8m


Please check your Fishsafe plotter data

See detailed map on our bulletin website

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Rig Move - V120 to Judy Riser Platform



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


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Inspection and Survey - Liverpool Bay Asset



To support the jack up operations there is required to be a geophysical survey and an environmental survey at the P&A locations prior to the jack up performing the operations. Geophysical surveys were performed in 2024 covering all locations. Additional surveys are required this year for data validity and are indicated below.


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Diving work on 52/5a Platform, all SS wells in the Hewett Field



DSV Topaz will be conducting diving and ROV operations at the Hewett field. Activities will be diving at installation 52/5A and all 7 SS wells. the duration of the project is 30-60 days.


Diving and ROV activities.

Onboard ENI Rep; ryan.phipps@external.eni.com 

See detailed map on our bulletin website

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Decommissioning operations - Spirit Energy A-Fields and Ensign Field Decommissioning



Spirit Energy has contracted the Deep Ocean - operated Normand Jarstein) construction support vessel (CSV) to undertake further decommissioning activities - the removal of redundant subsea infrastructure - in the A-Fields and in the Ensign field, located in the southern North Sea. The fields formerly produced natural gas and condensate.


 

The CSV is scheduled to mobilise in Peterhead as soon as 7th October, and to commence removal operations in the fields as soon as 10th October 2023. The operations are expected to take approximately 71 days in total.  

 

The operations will take place at the Ann, Alison and Annabel subsea installations, and also at the former locations of the Audrey A, Audrey B and Ensign platforms, and are scheduled to commence during late Q3 2023 and to continue, depending on the amount of weather-related down time, through to as late as January 2024. 

 

Note that while the jackets and topsides of the Audrey A and Audrey B platforms and the Ensign platform were successfully removed during July 2023, remnant subsea structures exist within the footprint of where each platform jacket formerly stood (awaiting removal by the CSV).

 

All operations  (other than vessel transits) will take place within the HSE-recognised 500 m safety zones that remain established at the former location of each platform, and at the subsea installations.

 

 

 

 

See detailed map on our bulletin website

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Rig Move - Ensco 92 to Crossans



Harbour Energy plan to move the Ensco 92 Jack-up drilling rig from the Millom West platform location to the Crossans field location to perform abandonment operations on the 110/02b-10 subsea well. Throughout the well abandonment operations there will be a dedicated Emergency Response and Rescue Vessel (EERV) on location monitoring the surrounding area.


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Rig - COSL Promoter



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Deepsea Atlantic



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Shelf Drilling Winner (ex Noble Sam Turner)



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Well Safe Protector



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Ocean Endeavor Anchor Spread - Penguins - Pan NW



The Ocean Endeavor will be drilling a development well at Pan NW at the Penguins field, Northern North Sea. This will have 12-line mooring spread, extending out up to 1.5km from rig positioning. The activity will last ~3months from March through to June.


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Rig - 590021



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Valve De-isolation - Pierce Field



Vessel : Seven Kestrel will be at Pierce doing valve De-isolation of the field for 3 days then will move to Penguins (which is captured in another Bulletin), then will be located at HOWE for Pipeline Inspections for 3 days.


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Decommissioning/IRM Activities 2024 - Central North Sea & Southern North Sea



The DSV Boka Da Vinci will be completing decommissioning activities at SNS, Murdoch/CMS III, Johnston , Balmoral and MacCulloch, and IRM activities at Callanish. The Boka Polaris will be undertaking IRM work at NW Seymour


The DSV Boka Da Vinci is due to mobilise in Sunderland on 1st March to undertake a 220 day offshore campaign to execute the IRM and Central North Sea and Southern North Sea Decommissioning Scopes. The vessel will be working at SNS, Johnston, Murdoch, Balmoral, and MacCulloch 500m safety zones. Upon completion of the offshore campaign, the vessel will demobilise in Sunderland.

 

The Boka Polaris will mobilise circa 26th March for a 7 day scope at NW Seymour.

See detailed map on our bulletin website

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Subsea Obstruction - North East of the Southwark platform



Scour Conditions have created a protruding section of the export pipeline 100 metres North East of the Southwark platform


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Rig - Maersk Innovator



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Metocean Buoys - Victory Development Area



1x metocean buoy and 1x metocean buoy mooring floating in the water column at the Victory development area. Submerged buoy is 18 m above seabed. Note that surface buoy mooring can move up to 150 m around deployment location. Note that moorings are not visible on the surface.


Surface buoy mooring (Western most):

WGS84: Lat: 60° 59' 11.52"N, Long: 01° 54' 06.96"W

Mooring: 3000 kg steel balast with chain

Buoy diameter: (not connected)

 

Submerged buoy (Eastern most)

WGS84: Lat: 60° 59.196' N, Long: 01° 53.709' W

Water Depth: 145.9 m

Mooring: 500 kg steel balast with chain

Buoy diameter: 1 m

See detailed map on our bulletin website

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Rig - Paul B Loyd Junior



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Noble Reacher (ex Maersk)



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Noble Resolute (ex Maersk Resolute)



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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DSV Campaign - Penguins



This DSV campaign aims to complete work previously consented under approved consented applications in October which includes some light construction works at DC5 and DC7. Some inspection and brownfield integrity checks will also be performed throughout the field prior to FPSO arrival later next year.


Provisional Mob date & duration:  19th Feb 2024 (Duration 6 weeks)

 

VESSEL: Seven Kestrel

 

The respective scopes include the DSV accessing the following Penguins locations:-

 

RBM, DC2, DC3, DC4, DC5, DC6, DC7, DC8 & DC9

See detailed map on our bulletin website

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Replacement Control Jumper - Penguins E1 Wellhead



This work scope is to replace the Control Jumper "PL1903JE1" which was previously consented but was not completed. The control jumper will be disconnected at either side and remain on the seabed adjacent to the Penguins DC5 control structure and Well E1. A new replacement control jumper (PLU6350) will be installed from the Penguins DC5 control structure to Well E1. Vessel : Seven Kestrel


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Topside Removal - Amethyst A1D



ERDA Jackup Barge will come alongside Amethyst A1D to remove the topside. The Jacket will be retained.


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Wellhead structure on location which could present a hazard to other sea users



The wellhead structure extending above the seabed is a snagging hazard. Note, details are included in FishSAFE and guard vessel will vacate location on 16th February.


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Rig - Seafox 2



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Swift 10



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Deepsea Yantai



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig Move - COSL Pioneer



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Well Intervention Project - West Sole Charlie



The Petrodec HAEVA will be positioned at the West Sole Charlie (WSC) installation for a Well Intervention Project.


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Pipeline and platform Survey - Hewett Field - Atlantis Dweller



Standard IRM survey covering associated pipelines and platform structures in the Hewett Field. Vessel is the Atlantis Dweller


Techniques used will be MBES/ROV/GVI/FMD/CP.

See detailed map on our bulletin website

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Rig - Valaris Gorilla VI



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Askeladden



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Well Operations - Stena Don Arran Field



Notification of rig operations at Arran field with the Stena Don


Note:

The anchors anchors are connected to the rig via mooring lines.

The anchors and morring lines extend outwith the rig 500m zone.

See detailed map on our bulletin website

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New Wells on Seabed - Captain Field Drill Centre D



Three new wells have been installed at the Captain Field, Drill Centre D. The well (i.e. xmas tree) height above the seabed is approximately 6m. Mud mattress geometry is approximately 6m x 3m x 0.15m (height).


Drawing 'CP1913-7000-D101' details concrete mattress. 

Drawing 'CER-PGEN-TEC-LAY-TEC-0000-00004-00_K02_1' details 3 new wells and their coordinates. 

See detailed map on our bulletin website

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Ensco 92 Rig move to Crossans Well - UKCS 110/2 & Subsea Rock Installation works



The Ensco 92 MODU will be moved to the open water Crossans well location ~1st week February 2024, the location shall be subject to subsea rock installation prior to rig arrival


The jack up rig E92 shall be located at the Crossans open water well location towards the start of February 24 to complete a well Plug and abandonment operation. 

 

Prior to rig arrival the subsea rock installation vessel 'Rockpiper' shall be utilised to stabilise the seabed, operations shall be completed ~28th January. The vessel shall be restricted in its ability to manoeuvre and shall be displaying the applicable navigational lights and day shapes. All vessels are requested to maintain a wide berth.

 

Upon locating of the rig, a statutory 500 meter exclusion zone shall be established. During final positioning 4 temporary moorings shall be deployed out to a range of approximately 500m from the rig, these shall be recovered with the rig jacked up and operational.

 

All localised static fishing gear that may be deployed within the area should be cleared from within the 500m/z, centred on the following position; 

 

53 50' 38'' N  003 44' 34'' W (INT 1924 ED 50 UTM Z30N 3 W)

See detailed map on our bulletin website

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Pipeline In Line Inspection Operations - LOGGS



Subsea 7 shall be utilising the DSV Seven Falcon to support pipeline inspection operations from open water locations in the SNS, Block 49. Pipeline "In Line Inspection" works are being performed to support potential re-use for future Carbon Capture and Storage operations.


One site shall be worked on PL0454 - LOGGS Platform to Theddlethorpe, 36" Disused Gas Pipeline.

 

The second site shall be in the vicinity of the Decommissioned (Removed) Viking AR platform on the disused PL0027 - Viking AR to Theddlethorpe Gas Terminal 28" Gas pipeline.

 

During the subsea operations the associated pipeline deburrial and cutting operations may present a fishing snag hazard, for this reason the operation shall be supported by a Guard Vessel - Details TBC.  Prior field departure exposed pipeline ends shall be buried with graded rock to remove snag hazards.

 

The DSV shall be restricted in her ability to manoevre throughout the planned operations and shall display the appropriate day and night signals. The Seven Falcon shall maintain a continuous listening watch on VHF CH.16.   

 

Offshore operations are anticipated to be ongoing for ~30 days. 

 

All vessels are requested to maintain a wide berth and maintain at least ~1nm clearance from the DSV operations and a wide berth from the pipline cut locations.

See detailed map on our bulletin website

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Subsea Decommissioning - Durango



The Durango subsea well and associated infrastructure will be decommissioned between July and September 2024. The HAEVA Jackup Barge will be on location to facilitate the decommissioning activity.


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Decommissioning - Leman 27J



Decommissioning activity will be carried out at the Leman 27J platform between June and September 2024. The ERDA Jackup Barge will be interfaced with the platform for the duration of the project.


The decommissioning of the Leman 27J installation will involve the plug and abandonment of all wells, making the topside hydrocarbon safe (HSC), and the removal of the topside and it transport to shore for recycling. The ERDA Jackup Barge will be interfaced with the installation for the duration of the project.

See detailed map on our bulletin website

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Anchor Spread - Suspended Well 9/08-2



Anchor pre-lay for MODU due at the start of March. Anchor Pre-lay due at the beginning of February.


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Anchor Spread - Suspended Well 9/08-1



Anchor prelay for the arrival of a MODU. Pre-lay due at the beginning of Feb, rig arrival the start of March.


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Valaris V121 over Shearwater Alpha



Valaris V121 MODU jack-up rig will be situated over Shearwater Alpha platform. Duration Valaris V121 MODU will be on location estimation 730 days.


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Rig - Askepott



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - West Phoenix



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Valaris 72



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig - Well-Safe Guardian



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Valaris Norway LBA



Valaris Norway will be on site from the 1st Jan in Liverpool Bay, 1400m exclusion zone. P&A of SS well 110-15 6z -  1400m exclusion zone in force 


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Rig - Noble Invincible



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Rig Move - PBLJ MODU at Callanish



Notice to alert sea users to drilling and completion operations at the Callanish 15/29b-FQ subsea development well location, using the PBLJ MODU.


The PBLJ semi-submersible drillling rig is due to move to the Harbour Energy 'Callanish' subsea development location at the end of December to comence drilling and completion operations on the 15/29b-FQ development well.  

See detailed map on our bulletin website

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Rig Move - Noble Intrepid at Judy



Notice to alert sea users of the planned location of the Noble Intrepid jack-up MODU alongside the Judy production installation in block 30/7a.


The Noble Intrepid jack-up MODU will be locating alongside the Judy production installation in block 30/7a to provide accommodation and perform well intervention work.

See detailed map on our bulletin website

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Rig - Noble Intrepid



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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PL24 Cut-point Freespan



The cut-point of PL24 has become exposed and is protruding significantly from the seabed; approximately 17m long and 6m high. This creates an increased risk of snagging of trawling equipment, or similar, compared to a regular freespan.


The cut-point of PL24 has become exposed and is protruding significantly from the seabed; approximately 6m from the seabed at its highest point and overhanging approximately 17m long from where the line makes contact with the seabed again. This creates an increased risk of snagging of trawling equipment, or similar, compared to a regular freespan.

See detailed map on our bulletin website

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Foinaven Buoyant Risers



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


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Anchor Pattern for Valaris-V121 at Shearwater



Valaris jack-up V121 rig on location at Sheaerwater platform, including anchor patterns.


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Well Intervention Work - HAEVA MODU at Neptune



Please be advised that the HAEVA MODU is due to depart from Gawain on Sunday 19th November 2023 (at the earliest and dependent on weather), and transit to Neptune (UKCS 47/04) in the Villages Field, where it will commence Well Intervention work. The estimated earliest arrival date of the HAEVA at Neptune is Monday 20th November 2023. The MODU will remain on location at Neptune until 31st March 2024.


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Rig - West Elara



This oil & gas drilling rig has moved to this new position. Rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Seabed hazards following removal of Banff FPSO anchors & moorings



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


10 mooring line trenches, varying in length from 70m to 180m; up to 8 metres wide and up to 9 metres deep. These trenches are steep-sided, cut into the clay seabed.

See detailed map on our bulletin website

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Pipeline repair area following anchor removal - 3" Meg Carrick QA - Cutter



Area to be avoided. Possible pipeline damage and snagging hazard. An anchor was removed from the pipeline. As a result the pipeline status is reported as further inspection to assess safety required. Area to be avoided. potential pipeline damage and possible snagging hazard.


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Detached Wellhead Protection Structure (Wet Stored) - Vicoria Field



As part of decommissioning works in the Victoria field, the Victoria wellhead protection structure (WPS) has been cut from the wellhead and is now wet stored on the seabed. This structure lies within the Victoria well 500m safety zone, and is considered hazardous to fishing activity.


The Victoria wellhead protection structure (WPS) is currently wet stored on the seabed at the centre of the Victoria 500m safety zone close to its original location.  The rig was unable to recover the WPS as part of the well abandonment activities. 

 

Dimension 8m x 8m x 5m high

See detailed map on our bulletin website

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Platform Decommissioning - Cavendish and Windermere platform



The Cavendish and Windermere platforms are being removed from the Southern North Sea. A heavy lift vessel and associated anchor handing vessel and emergency response vessel will be present within the Cavendish and Windermere 500m zones from as early as the 10th October. The operations will involve the heavy lift vessel going between the two platform locations and The Netherlands.


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Metocean buoy - Pierce Area



A spherical wave buoy with a diameter of 0.9 meters was installed at Pierce Field on August 29th.


Colour: yellow

Shape: spherical

Diameter: 0.9m

 

The lantern has a flash sequence Fl (5) Y 20s. Please maintain a 200m exclusion around the buoy.

See detailed map on our bulletin website

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Rig - Valris 72



This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.


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Shearwater IWA well (22/30b- 18) - 30" Conductor stump



The Shearwater IWA well has been left in a suspended status with the 30" conductor including a debris cap protruding from the seabed approximately 8ft. This is a snagging risk and vessels are advised to remain a safe distance clear.


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Drilling activity - Valaris 122 at Jackdaw



The Valaris 122 (jack-up drilling rig) will be conducting drilling operations at the Jackdaw field on the 30/2a-JD02, JD03, JD05, JD06 wells. The Valaris 122 will be drilling through the newly installed Jackdaw platform on a four well campaign. The total duration of drilling and completion activities is expected to last approximately 538 days.


Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

See detailed map on our bulletin website

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Rig Move - Shelf Drilling Fortress (Invergordon to Golden Eagle)



Please be advised that the Shelf Fortress heavy-duty jack up drilling rig is planned to move from Invergordon Anhcorage No.10 to the Golden Eagle Field on 16th August 2023. This notice is to provide notification of the planned rig move and anchor positions at final location. This notice will remain live until anchors are recovered.


The Shelf Drilling Fortress will be positioned alongside the Golden Eagle platform with a rig heading of 335.9 degrees. The planned anchor positions are as below:

 

1. Starboard-Forward: 623 558 E, 6 427 414 N, 850m line length from fairlead

2. Port-Forward: 622 443 E, 6 426 873 N, 850m line length from fairlead

3. Starboard-Aft: 624 075 E, 6 426 308 N, 795m line length from fairlead

4. Port-Aft: 622 991 E, 6 425 783 N, 795m line length from fairlead

 

 

 

See detailed map on our bulletin website

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Rigmove - Valaris 121



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


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ILI Activation Tool - Snagging Risk



Installation of two ILI Activation Tools on the Main Oil Line (MOL) was completed on 12/07/2023 by a dive support vessel (DSV). The tool is a small structure that will go around the Main Oil Line (MOL) and will remain in place until October 2024. This will be a snagging hazard for nets and trawlers.


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