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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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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 northwest 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 northwest of the UK coastline and 150 km from the UK/ Netherlands transboundary line.
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Well Operations - Leverett Well
Petrofac Facilities Management Limited have pre-laid 8 anchors at the Leverett well location in advance of the arrival of the Transocean PBLJ semi sub in July. A guard vessel will be in place.
The Transocean Paul B Loyd Junior semi-sumbersible drilling rig will arrive on location around 15th July, hook up to the pre-laid anchors and undertake drilling operations until approximately the end of year. The guard vessel will leave the location on arrival of the PBLJ.
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Geotechnical Drilling - Selene Site
4x boreholes will be drilled by Fugro Quest at the Selene site. Fugro Quest will be drilling for 5-10 days (pending weather) and therefore be connected to the Seafloor. Fugro Quest has limited manoeuvrability whilst on-site
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Infill Well Survey - Bruce Wells
Serica is planning to undertake an environmental survey using a Work-Class Remotely Operated Vehicle (WROV) and an over the side deployed environmental sampling system for the survey for the Bruce wells. The purpose of the environmental survey is to meet the requirements for a Habitat Assessment Survey (HAS) and Environmental Baseline Survey (EBS) to cover the two planned wells and the pipeline. This will include an environmental camera (HR Video and stills), and EBS grab sampling.
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ROV Survey - Arthur Subsea Installation
Perenco UK have commissioned ROV survey for the Arthur installations to support decommissioning activities. The vessel is from Reach Subsea. The Olympic Triton is due to depart Great Yarmouth on the 30th November 2023.
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ERDA Jack-up Barge at Ravenspurn South Charlie
Please be advised that the ERDA Jack-up Barge is due to transit to Ravenspurn South Charlie (RSC) in the Ravenspurn South (UKCS 42/30) field where it will commence well intervention work, with an estimated arrival of Sunday 10th December 2023 (dependent on weather). The Jack-up Barge will remain at RSC until latest 29th February 2023.
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Rig Move Loyal to Schiehallion North West
Please be advised that 8 existing anchors and seabed moorings at Schiehallion West have been recovered and re-laid at Schiehallion NW as per the below as-installed locations. 8 surface buoys have also been installed at NW, within the proposed mooring pattern. The semi-submersible rig Ocean Great White will move from Loyal to Schiehallion NW during the period Nov 30 - Dec 06, subject to weather and operations. Upon completion of the rig move, the moorings at Loyal expect to be recovered.
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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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Brent Subsea Infrastructure Decommissioning Programme - Brent Field
Carrying out Subsea Decommissioning programme in the Brent Field. The Subsea Infrastructure Decommissioning project intends to conduct decommissioning scope on Brent infrastructure in 2023. This will entail decommissioning pipelines/umbilical and power cables (by various methods) and the removal of subsea infrastructure, mattresses, grout bags, and subsea debris.
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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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Decommissioning - Gawain subsea infrastructure
The HAEVA Jackup Barge will support the decommissioning of the Gawain Subsea infrastructure.
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Rig - COSL Innovator
Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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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 - 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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Survey - Scott Area
The purpose of the survey is to conduct a visual inspection of the Scott field subsea infrastructure. It is anticipated that the survey will take up to 69 days to complete. The earliest planned start date of the survey is 25th November 2023, with a latest end date of 31st of January 2024.
The scope of work for this campaign can be summarised as:
- Scott UQ platform jacket inspection:
- ROV General Visual Inspection (GVI), Contact Cathodic Protection (CP) readings, Proximity CP readings, Flooded Member Detection (FMD), Marine Growth (MG) assessment & Scour Measurements;
- Scott DP platform jacket inspection:
- ROV General Visual Inspection (GVI), Contact Cathodic Protection (CP) readings, Proximity CP readings, Flooded Member Detection (FMD), Marine Growth (MG) assessment & Scour Measurements;
- Scott pipelines, umbilicals and structures:
- ROV GVI & CP; MBES
- Rochelle pipelines, umbilicals and structures:
- ROV GVI & CP; MBES
- Telford pipelines, umbilicals and structures:
- ROV GVI & CP; MBES
The survey will be conducted by the vessel EDT Jane ROVSV, which is operated by Fugro. It is expected that the visual inspection will take up to a maximum of 69 working days. (21 days of weather included)
During the survey the ROV will conduct a visual assessment and inspection of the locations listed as follows:
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Location |
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UQ Platform |
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PLEM |
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SWIM |
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WWIM |
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EWIM |
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EPC |
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South Scott |
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Marmion |
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Central Telford |
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Telford Water Injection |
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East Telford |
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West Rochelle |
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East Rochelle |
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Rochelle SSIV |
Rig Move - Ensco 92 to Millom West
Harbour Energy plan to move the Ensco 92 Jack-up drilling rig from the Darwen field to the Millom West platform location to perform abandonment operations on the 113/26a-P1, P2Y, P3Z and P4X platform wells. 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 - Seafox 7
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - 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 - Prospector 1
This oil & gas drilling rig has moved to this new position. Rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Seafox 4
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - 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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Cable Trenching Activities - South Morecambe Bay Gas Field CPP-1 and DP8 Platforms
Spirit Energy has contracted the Deep Ocean - operated Olympic Ares construction support vessel (CSV) to trench the recently laid cable that is currently lying on the seabed between the CPP-1 platform and the DP8 platform. The CPP-1 and DP8 platforms are located approximately 6 km apart in the South Morecambe gas field, east Irish Sea, UKCS blocks 110/3 and 110/2 respectively.
The CSV is scheduled to commence mobilisation in Ulstein Verft, Ulsteinvik, Norway as soon as 10:00 hrs on 25th November 2023, and to depart for the South Morecambe gas field 12 hours later. Cable trenching activities are then scheduled to commence as soon as 29th November 2023, and to complete approximately 7 days later (with an allowance for weather downtime).
All activities (other than vessel transits) will take place within the HSE-recognised 500 m safety zone established around each platform, and in the approximate 6 km long cable lay ‘corridor’ (an approximate geographical straight line) between the two platforms.
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Well-Safe Defender - Trees Field Area
The Well-Safe Defender will move location from the Larch field to the Birch field to undertake well plug and abandonment on or around 2 October 2023. This date is subject to change depending on weather and operational requirements. Work will be undertaken at Trees within the following locations in block 16/12a and include: Sycamore, Birch and Larch. Work is expected to finish in the area by mid-December 2023.
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Wellhead Severance - North Eigg
The Siem Day will be carrying out wellhead severance and recovery work at this location. The earliest commencement date is 13/12/23.
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ROVSV Survey - PL10 Short Water Crossing Cul Ness & Firth Ness
ROVSV survey work on PL10 short water crossing between Cul Ness & Firth Ness.
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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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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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ROVSV Survey - PL10 - 12Nm to Grut Wick
ROVSV Atlantis Dweller will be conducting pipeline survey along PL10 from the 12Nm limit to landfall at Grut Wick.
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Rig - Shelfdrilling 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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Victoria Wellhead Protection Structure (block 49/17a)
Wet store of the Victoria wellhead protection structure (area of approx. 25m x 25m). On behalf of the Licence Operator (NEO Energy), and following decommissioning removal of the Xmas Tree and well sections, the Victoria Wellhead Protection Structure (WHPS) will be temporarily wet stored at the existing well location pending removal by Multi Purpose Offshore/Construction Survey Vessel (name tbc). The WHPS will be removed no later than 31 December 2023.
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Geophysical and ROV survey of GNI Gas Interconnectors - Scotland, Ireland and the Isle of Man
Starting in November 2023, survey work is due to be carried out along the two high pressure gas interconnector pipelines running between Scotland, Ireland and the Isle of Man. The Shallow water survey (to 10m below LAT) is due to start on 14th November 2023. The Deep water survey is due to start on 4th December 2023. Both surveys are due to be completed by the end of December.
Shallow water survey work
The survey vessel AMS Panther will be conducting a geophysical and ROV survey of the pipeline landfalls in Scotland (Brighouse Bay and Ross Bay, Kirkcudbright), and Ireland (Loughshinny and Gormanston). This shallow water survey will extend to a depth of approximately 10m below LAT at each location.
In addition to the landfall surveys, this campaign will include a survey of the Isle of Man “Tee” junction that is situated at a depth of 30m below LAT at this location:-
- Isle of Man “Tee”: 54º 20′ 30.83″N 004° 44′ 29.01″W
The survey work is due to start on the 14th November 2023 at the Scottish landfall. The survey is due to be completed by the end of December 2023.
All dates are subject to sea and weather conditions. Updates on the schedule will be provided as the survey progresses.
Vessel details
Information about vessel carrying out this work is provided below:-
- AMS Panther (shallow water survey): Research / survey vessel | Call sign 2EHC2
The survey vessel will be displaying the relevant day shapes and night lights as specified by the International Regulations for the Prevention of Collisions at Sea (“IRPCS”). Towed gear will be operated from the vessel.
The vessel involved in this work may be restricted in its ability to manoeuvre and other vessels are reminded to pass at a safe speed and maintain a wide berth of at least 500m distance.
Offshore survey work
The survey vessel 4Winds will be conducting a geophysical and ROV survey of the pipelines in waters deeper than 10m below LAT. The survey campaign will include the Isle of Man "Tee" junction that is situated at a depth of 30m below LAT at this location:-
- Isle of Man "Tee": 54º 20' 30.83"N 004° 44' 29.01"W
Locations of the survey extent are provided in the Notice to Mariners.
The survey work is due to start on the 4th December 2023. The survey is due to be completed by the end of December 2023.
All dates are subject to sea and weather conditions. Updates on the schedule will be provided as the survey progresses.
Vessel details
Information about the location of the vessel carrying out this work is provided below:-
- 4Winds: Research / survey vessel | Call sign 3E6084
The survey vessel will be displaying the relevant day shapes and night lights as specified by the International Regulations for the Prevention of Collisions at Sea ("IRPCS"). Towed gear will be operated from the vessel.
The vessel involved in this work may be restricted in its ability to manoeuvre and other vessels are reminded to pass at a safe speed and maintain a wide berth of at least 500m distance.
Further details about the survey vessel are given in the Notice to Mariners.
Additional information
The two Irish Sea Gas Interconnectors (“IC1” and “IC2”) are operated by Gas Networks Ireland (“GNI”). The two Irish Sea Interconnectors and the Isle of Man Spur were installed between 1992 and 2003.
GNI have produced a High Pressure Subsea Gas Pipeline Awareness leaflet (attached). This leaflet shows the route of the pipelines, describes their structure and presents advice on hazards associated with them.
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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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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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DSV installation inspection/survey works - Liverpool Bay Area
Various diver inspections on various platforms in the Liverpool bay area. Diver inspection works at various elevations on Oil Storage Installation , Douglas, Douglas Accom, Hamilton and Hamilton North platforms in the Liverpool bay area. Pipeline Inspects will also take place if time allows. All work will be completed from the DSV Boka Polaris. The Curtis Marshal DSV Vessel has now taken over operations. Primary location is the Lennox Platform, fall-back work a the OSI & Douglas.
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VBA Campaign - Keith Wells
The Siem Day is carrying out a VBA at several Keith wells that never came into production. The current mobilisation date is 10.11.23.
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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.
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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 - 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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K2 Well - Not permitted to enter 500m zone
Esvagt Kappa Guard vessel in field at the K2 well. Unauthorised vessels, including fishing vessels, will not be not permitted to enter this 500 m zone.
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Anchor handling operations - Buzzard Northern Terrace Manifold location
Rig (COSL Innovator)on location as of 15th May 2023 at 21:30 hours. Rig anchor handling and cross-tensioning complete at Buzzard Northern Terrace Manifold location at 17th May 2023 at 16:45 hours.
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Rig - Deepsea Stavanger
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Askeladden
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Deepsea Aberdeen
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Ocean Endeavor Drilling Rig Location - Fram Field
The Ocean Endeavor will be drilling on the Fram Location in the Central North Sea. This is scheduled to commence on ~27th of October and is scheduled to conclude on the 1st February 2024. The Ocean Endeavor has 12 mooring lines that extend out from the rig by up to 1,600m.
The Ocean Endeavor will be drilling on the Fram Location in the Central North Sea. This is scheduled to commence on ~27th of October and is scheduled to complete 1st February 2024. The Ocean Endeavor has 12 mooring lines that extend out from the rig up to 1,600m.
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Transocean Enabler - 15 8-G Utgard
Pre-installation of anchors and bottom chain in preparation for intended for "Transocean Enabler" drilling operations at the Utgard template. The pre-installed mooring system comprises 8 anchors with 1500-1600m of bottom chain per line. All 8 lines will be buoyed off with surface buoys.
Skandi Vega (IMO 9435715) and Aurora Sandefjord (IMO 9470466) will be used to pre-install anchors for the upcoming operations at the Utgard template. 8 of 15t Mk6 anchors together with their respective bottom chain segments will be pre-laid at Utgard template. Due to difficult soil conditions at Utgard each anchor will be pre-laid with a pigg anchor to ensure setting. Bottom chain mooring line segments comprise lengths from 1500-1600m 84mm R4 and R5 chain. At the end of the chain segment a pennant wire and surface buoy will be attached as shown in the attached image.
- Pre-lay is expected to be installed circa 17th October
- Transocean Enabler arrival at Utgard location expected circa 25th October
- Transocean Enabler departure from Utgard + retrieval of mooring system circa 21st November
Location from template center to range 2900m radius will be under surveillance from Equinor Marine Operations throughout both pre-lay phase and period with Transocean Enabler on location.
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Rig - Valaris Norway
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Noble Innovator
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Ocean Patriot
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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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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Freespan - 4" Meg Bacton - Leman AP
High Freespan. Max 13m long freespan with height exceeding 1.6m
Please check your Fishsafe plotter data
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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
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Rig move & Appraisal Well Drilling - Devils Hole (block 27/5)
The Valaris (Rowan) Norway HDJU rig is scheduled to arrive and commence appraisal well drilling at the Devils Hole location (block 27/5), between 06/10/23 and 10/10/23.
On behalf of the Licensee (North Sea Natural Resources Ltd), and using the Valaris (Rowan) Norway HDJU rig (call sign V7WA9) - Three60 Energy are planning to undertake appraisal drilling operations at the Devils Hole (Horst) location (block 27/5).
Work is anticipated to commence between 06/10/23 and 10/10/23, for approx 73 days duration.
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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.
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Cable lying exposed on seabed - South Morecambe gas field, east Irish Sea
A newly laid power cable lies exposed on seabed awaiting trenching and burial between the DP8 and the CPP-1 platforms, Spirit Energy South Morecambe gas field, east Irish Sea
Over the period 29th to 30th September 2023, an approximately 6 km long power and communications cable was laid on the seabed in an approximately straight line beween DP8 and the CPP-1 platforms, located in the Spirit Energy operated south Morecambe gas field of the east Irish Sea.
The cable will lie exposed on the seabed for a period of up to 70 days before being trenched and buried using specialist equipment deployed by a surface vessel.
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Rig - Noble Lloyd Noble
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - 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 - 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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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
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Stena Don MODU on location - Kingfisher Field
Stena Don MODU has taken up location at the Kingfisher Field for a 5 x well anchor pattern
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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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Tolmount East Development (42/28d -13 & 14)
The Tolmount East well (42/28d-14 has been drilled and completed and a statutory 500 metre exclusion zone has been established at the location. Further field development remains ongoing throughout the course of 2023, in support of tying back the Tolmount East Well to the Tolmount Platform (located ~2nm South West of Tolmount East).
All vessels are requested to maintain a wide berth and avoid deployment of static gear within ~1nm of the development between Tolmount East 500m/z and the Tolmount Platform 500m/z.
The OSV North Sea Atlantic shall be utilised for the installation of subsea infrastructure from ~24th Sept and shall be operational in field for ~2 weeks, (subject ops and weather).
The above operations shall be followed on by a subsea rock installation campaign utlising the FFPV Stornes from mid October
The infield construction works shall be concluded via DSV operations utilising the Seven Atlantic from mid October to early November 23.
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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 currently on hire to NEO at the Leverett 21/03d-9Z well location. It is due to move to the Harbour Energy 'Callanish' subsea development location at the end of September to comence drilling and completion operations on the 15/29b-FQ development well. The PBLJ is currently forecast to be on location at Callanish on 2nd October (earliest forecast).
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Metocean Buoys - Victory Development Area
2 x metocean buoys are installed at the Victory development area. One is floating on surface, while the other is 18 m above seabed, both with clump weights. Note that surface buoy can move up to 150 m around deployment location.
Surface buoy (Western most):
WGS84: Lat: 60° 59' 11.52"N, Long: 01° 54' 06.96"W
Charcter: Fl (5) Y 20s
Colour: Yellow disc
Mooring: 3000 kg steel balast with chain
Buoy diameter: 3 m
Submerged buoy (Eastern most)
WGS84: Lat: 60° 59' 11.94"N, Long: 01° 53' 41.82"W
Mooring: 500 kg steel balast with chain
Buoy diameter: 1 m
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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.
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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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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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Rig - Transocean Spitsbergen
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Deepsea Atlantic
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Noble 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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Isolde OBN Seismic Survey - UKCS Blocks 22/30, 23/26, 23/27, 29/5, 30/1 and 30/2
TGS will be conducting a OBN 3D seismic survey. The nodes will be deployed to the seabed from the Normand Tonjer vessel. The seismic source will be on a separate vessel, the Oceanic Champion. A chase vessel (Shemarah II LH65) will also accompany the survey vessels to liaise with fishermen and other small vessels and prevent collisions with the survey equipment. The survey vessels will follow a pre-planned set of survey lines and move at a speed of around 4.3 knots.
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Designations |
|
1 |
Normand Tonjer |
9422108 |
LAXJ5 |
Mothership – Node Handling |
|
2 |
Oceanic Champion |
9085211 |
LAJQ6 |
Source Vessel |
|
3 |
Shemarah II LH65 |
9120889 |
MVRR7 |
Chase/Guard Vessel |
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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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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Judy oil export tie in spool at NORPIPE wye - pipe exposure
Judy oil export tie in spool at NORPIPE wye - pipe exposure over ca 50m creating additional trawl hazard. Rock was removed from Judy oil export tie in spool at NORPIPE wye in mid 2022 in support of valve changeout at NORPIPE wye. Valve changeout has been delayed until 2025 at which point rock will be reinstated. Absence of rock poses an increased risk of snagging fishing nets and also of pipeline damage.
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Rig Move - COSLPioneer in the Captain Field
Please be advised that the COSLPioneer, a semi-submersible drilling rig, moved within the Captain Field from 'Drill Centre E' to 'Drill Centre D' on 14th August 2023. This notice updates the Rig's location and provides the anchor locations at the new location at 'Drill Centre D'.
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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.
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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
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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 - 590021
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - 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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Isolation Valve Structure (IVS) Installation - Wood Supplementary Valve Skid (SVS)
The Wood Supplementary Valve Skid (SVS) workscope will be conducted over two phases in Q3 2023 and Q2 2024, an Isolation Valve Structure (IVS) will be installed from circa 8th August, the DSV will be infield for a period of 4-5 days. The structure is planned to be installed with a centre position of (57' 21' 40.6" N 01' 26' 27.1" E), the as built position will be updated following installation. The structure will be tied into the well and the pipeline in Q2 2024.
The Wood Supplementary Valve Skid (SVS) workscope will be conducted over two phases in Q3 2023 and Q2 2024, an Isolation Valve Structure (IVS) will be installed from circa 8th August, the DSV will be infield for a period of 4-5 days. The structure is planned to be installed with a centre position of (57' 21' 40.6" N 01' 26' 27.1" E), the as built position will be updated following installation (see attached file Wood SVS - Phase 1 Layout which shows the layout at the well with the IVS which will be the status between August 2023 and April 2024). The structure will be tied into the well and the pipeline in Q2 2024 (see attached drawing no. MON-SS-GA-00020-001 for seabed status post installation).
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Rig - Erda
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 247 MODU at Ravenspurn South Charlie
Please be advised that the Valaris 247 MODU is due to depart from ST3 on Friday 11th August 2023 (dependent on weather), and transit to Ravenspurn South Charlie (RSC) in the Ravenspurn South (UKCS 42/30) field where it will commence Drilling Operations work, with an estimated arrival of Saturday 12th August 2023. The MODU will remain at RSC until 31st December 2023.
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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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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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Snagging Risk - Exposed Pipeline - Clair Field
Increased risk of snagging. The pipeline PL3184 and tie-in spool have been dragged out of position by approximately 3m to the west. Several protective concrete mattresses have also been displaced, with one torn into sections – this leaves the pipeline exposed for approximately 25m.
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Anchor Pre-Lay at Buchan Production template Location
Please be advised that Well-Safe Solutions, on behalf of Repsol Sinopec Resources UK propose to place moorings on the sea-bed at the Buchan Field from 7/07/2023 in advance of the mooring of the Semi-submersible Rig Well-Safe Guardian. The anchors are planned to be in position until December 2023.
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Rig - Well-Safe Guardian
Notice to alert sea users to P&A activity within the Buchan field using the Well-Safe Guardian MODU in Block 21/01 on wells 21/01-6 (B01), 21/01a-7 (B02), 21/01a-9v (B3), 21/01a-11 (B5), 21/01-2z (B6) and 21/01-4 (E&A4)
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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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Rig - Transocean Enabler
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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Decommissioning/IRM Activities - Central North Sea & Southern North Sea
The CSV Boka Southern Ocean will be completing decommissioning scopes at SNS, Balmoral, Brenda, Huntington and MacCulloch. The DSV Boka Da Vinci will be completing decommissioning activities at SNS, Balmoral, Huntington and MacCulloch, and IRM activities at Joanne, Johnston and Catcher.
The CSV Boka Southern Ocean is due to mobilise in Aberdeen on 25th May 23 to undertake a 194 day offshore campaign to execute the Central North Sea and Southern North Sea Decommissioning Scopes. The vessel will be working at SNS, Balmoral, Brenda, Huntington and MacCulloch 500m safety zones. Throughout the campaign, port calls will be completed to/from Lerwick and Blythe for the waste disposal activities. Upon completion of the offshore campaign, the vessel will demobilise in Peterhead.
The DSV Boka Da Vinci is due to mobilise in Sunderland on 3rd April 23 to undertake a 245 day offshore campaign to execute the IRM and Central North Sea and Southern North Sea Decommissioning Scopes. The vessel will be working at SNS, Joanne, Johnston, Catcher Balmoral, Huntington and MacCulloch 500m safety zones. Upon completion of the offshore campaign, the vessel will demobilise in Sunderland
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