Rig: West Hercules

Name West Hercules
Owner Seadrill Ltd
Manager Seadrill Ltd
Rig Type Semisub
Sub Type Ultradeep Water
Jackup Type --
Max Water Depth (ft) 10000
Max Drill Depth (ft) 35000
Dimensions (ft) 382.5 x 256 x 82
Leg Length (ft) --
Competitive Yes

Current Location

Country Norway
Region NWECS

Drilling Equipment

Drawworks Type National Oilwell Varco ADS 30Q
Drawworks HP 4500
Mud Pumps Type AKMH Wirth TPK 2200
Top Drive Aker Maritime Hydraulics DDM-1000-AC-2M
Hookload Capacity (lbs) 2000000

Rig Construction Details

Rig Design Gotaverken
Rig Model GVA 7500
Year Built 2008
Country of Build South Korea
Yard Name Okpo Shipyard
Group Yard Name Daewoo Shipbuilding & Marine Engineering (DSME)

Rig Contract Details

Operating Status Operational
Operator Equinor

Rig Images

News

23 May 2016

Seadrill Receives Notice of Contract Cancellation for the West Hercules

Seadrill Limited ("Seadrill" or the "Company") has received a notice of termination for convenience from the current operator related to the contract for the West Hercules which was originally contracted for drilling in Norway with North Atlantic Drilling Ltd.. In accordance with the contract, the Company will receive a lump sum payment of approximately $61 million, plus dayrate and reimbursement of costs associated with demobilization of the rig. The West Hercules is currently being marketed for new work.

23 May 2016

Cancellation of rig contract

Statoil has, on behalf of the Aasta Hansteen licence, decided to cancel the contract with Seadrill for the West Hercules drilling rig. On contract with Statoil since 31 January 2013, the rig has carried out an exploration campaign offshore Newfoundland in Canada for the past 18 months. According to the original plan the Aasta Hansteen licence was to take over the rig in the second quarter of 2016 for a drilling campaign to be started around 1 July 2016. In the autumn of 2015 it was decided to postpone the Aasta Hansteen field start-up one year until the last half of 2018, and consequently the field drilling programme will also be postponed. One of the reasons is that it is not preferable to complete the wells too early before production start-up. The contract for West Hercules was originally to expire on 31 January 2017.

27 Jun 2014

Statoil hits dust at Brugdan II

Drilling of the Brugdan II Re-Entry well in licence 006 offshore the Faroe Islands has concluded. The well will now be plugged and abandoned. It was drilled to 4,542 metres and resulted in a dry well. The well is located 130 kilometres offshore the Faroe Islands and was respudded in May 2014. It was drilled using the ‘West Hercules’ semi-submersible rig in a water depth of 450 metres. This is the second exploration well that has been drilled in licence 006 which covers an area of approximately 579 square kilometres. Statoil has been in the Faroe Islands since 2000 and holds a significant acreage position with four operated licences. The licences are basalt-covered and target multiple and diverse plays. Statoil's position in the Faroe Islands is in line with the company's exploration strategy of early access at scale and establishing a leading position in frontier areas. ‘West Hercules’ will now move on to licence 008 in the Faroe Islands, where Statoil also is operator, to drill the Sula/Stelkur well.

5 May 2014

Statoil Awards Contract to CHC Helicopters Canada Inc. to Provide Offshore Transportation in North Atlantic

Norway-based oil-and-gas company Statoil has awarded CHC Helicopters Canada Inc. a contract to provide vital helicopter transportation to Statoil’s new exploration rig in the Atlantic Ocean, off the coast of Newfoundland. The 18-month contract calls for CHC Canada to operate two Sikorsky S-92 aircraft on behalf of Statoil. The helicopters will fly between their home base in St. John’s, Newfoundland, where CHC Canada is establishing a local presence, and Statoil’s West Hercules rig. The service is anticipated to begin in the fall of 2014. Statoil and CHC Helicopter, a service provider to CHC Canada, have extensive experience working together to assure safe operations in the North Sea – knowledge that CHC Canada will apply as it meets Statoil’s requirements off Newfoundland, where weather and sea conditions are similar.

2 May 2014

Statoil makes discovery with new Barents Sea well

Statoil Petroleum AS, operator of production licence 532, has completed the drilling of wildcat well 7220/7-3 S. The well has been drilled in the Barents Sea, about 15 kilometres southwest of the 7220/8-1 Johan Castberg discovery and 230 kilometres northwest of Hammerfest. The well's primary exploration target was to prove petroleum in reservoir rocks from the Middle and Early Jurassic Age (the Stø and Nordmela formations). The secondary exploration target was to prove petroleum in reservoir rocks from the Late Triassic Age (the Fruholmen formation). The well encountered a 68-metre gross gas column in the Stø formation and an 86-metre gross oil column in the Stø and Nordmela formations. The reservoir quality in the Stø formation is very good. The reservoir quality in the Nordmela formation is variable, but about half of the oil zone was encountered in sandstone with very good reservoir quality. The Fruholmen formation has poor reservoir properties, and is aquiferous. Preliminary calculations of the size of the discovery are between seven and ten million standard cubic metres (Sm3) of recoverable oil equivalents. The well was not formation tested, but extensive data acquisition and sampling have been carried out. The discovery will be considered for tie-in to 7220/8-1 Johan Castberg. This is the seventh exploration well in production licence 532. The license was awarded in the 20th licensing round in 2009. The well was drilled to a vertical depth of 2029 metres below the sea surface and was terminated in the Fruholmen formation from the Late Triassic. Water depth at the site is 345 metres. The well will now be permanently plugged and abandoned. Well 7220/7-3 S was drilled by the West Hercules drilling facility, which will move on to assignments outside the Norwegian shelf.

20 Feb 2014

'West Hercules' drills new gas discovery in PL 532

Statoil Petroleum AS, the operator of production licence 532, is in the process of completing the drilling of wildcat well 7220/4-1. The well has been drilled about 11 kilometres northwest of the 7220/8-1 Johan Castberg discovery in the Barents Sea and about 247 kilometres northwest of Hammerfest. The well’s primary exploration target was to prove petroleum in reservoir rocks from the Middle and Early Jurassic (Stø, Nordmela and Tubåen formations). The secondary exploration target was to prove petroleum in reservoir rocks from the Late Triassic (Snadd formation). The well encountered a gross gas column of about 130 metres in the Stø and Nordmela formations, with poorer reservoir quality than expected. In the Snadd formation, the well encountered an approx. 45-metre tall gross gas column. Preliminary calculations indicate that the discovery totals between two and four billion standard cubic metres (Sm3) of recoverable gas. The well was not formation tested, but extensive data collection and sampling have been carried out. This is the sixth exploration well in production licence 532. The licence was awarded in the 20th licencing round in 2009. The well was drilled to a vertical depth of 3209 metres below the sea surface, and was terminated in the Snadd formation from the Middle to Late Triassic. Water depth is 403 metres. The well will now be permanently plugged and abandoned. Well 7220/4-1 was drilled by the West Hercules drilling facility, which will now move on to drill wildcat well 7220/7-3 S on another prospect in the same production licence.

19 Feb 2014

'West Hercules' semisub receives permission to drill on production licence 532

The Norwegian Petroleum Directorate has granted Statoil Petroleum AS a drilling permit for wellbore 7220/7-3 S, cf. Section 8 of the Resource Management Regulations. Wellbore 7220/7-3 S will be drilled from the West Hercules drilling facility in position 72 24’ 08,73” N and 20 08’ 02,65” E. The drilling programme for wellbore 7220/7-3 S concerns drilling of a wildcat well in production licence 532. Statoil Petroleum AS is the operator with a 50% ownership interest and the other licensees are Eni Norge AS with 30% and Petoro AS with 20%. The production licence consists of blocks 7219/9, 7220/4, 7220/5, 7220/7 and 7220/8, and was awarded in the 20th licensing round in 2009. Wildcat well 7220/7-3 S is the seventh exploration well in production licence 532. The drilling permit is contingent on the operator securing all other permits and consents required by other authorities before the drilling activity starts.

9 Dec 2013

'West Hercules' strikes oil at Skavl prospect for Statoil in Norway

Statoil Petroleum AS, operator of production licence 532, is in the process of completing the drilling of wildcat well 7220/7-2 S. The well was drilled about five km south of the 7220/8-1 Johan Castberg discovery in the Barents Sea and about 240 km northwest of Hammerfest. The primary exploration target for the well was to prove petroleum in reservoir rocks from the Late Triassic Age (the Fruholmen formation). The secondary exploration target was to prove petroleum in reservoir rocks from the Early Jurassic (the Tubåen formation). The well encountered a gross oil column of about 133 metres in the Fruholmen formation, with poorer than expected reservoir quality. In the Tubåen formation, the well encountered a gross gas column of about 22 metres and a gross oil column of about 23 metres, with good reservoir quality as expected. Preliminary estimates indicate that the discovery is between three and eight million standard cubic metres (Sm3) of recoverable oil equivalents. Further delimitation of the discovery will be considered. The well was not formation-tested, but extensive data acquisition and sampling have been carried out. This is the fifth exploration well in production licence 532. The licence was awarded in the 20th licensing round in 2009. The well was drilled to a vertical depth of 1700 metres below the sea surface, and was terminated in the Snadd formation from the Middle to Late Triassic. The water depth is 349 metres. The well will now be permanently plugged and abandoned. Well 7220/7-2 S was drilled by the West Hercules drilling facility, which will subsequently drill wildcat well 7220/4-1 on another prospect in the same production licence.

8 Nov 2013

Statoil set to use 'West Hercules' semisub to drill PL 532 wildcat well

The Norwegian Petroleum Directorate has granted Statoil Petroleum AS a drilling permit for well 7220/4-1, cf. Section 8 of the Resource Management Regulations. Well 7220/4-1 will be drilled from the West Hercules drilling facility at position 72 35` 19,60" north and 20 14´ 06,30" east. The drilling programme for well 7220/4-1 concerns drilling of a wildcat well in production licence 532. Statoil Petroleum AS is the operator with an ownership interest of 50 per cent. The other licensees are Eni Norge AS with 30 per cent and Petoro AS with 20 per cent. The production licence consists of blocks 7219/9, 7220/4, 7220/5, 7220/7 and 7220/8. The licence was awarded in the 20th licencing round in 2009. Wildcat well 7220/4-1 is the sixth exploration well in production licence 532. The permit is contingent upon the operator securing the other permits and consents required by the authorities prior to starting drilling activity.

23 Sep 2013

Statoil makes gas discovery with drilling of Iskrystall prospect in Norway

Statoil Petroleum AS, operator of production licence 608, is about to complete the drilling of wildcat well 7219/8-2. The well proved gas. The well was drilled about 30 kilometres southwest of 7220/8-1 Johan Castberg in the Barents Sea and about 240 kilometres north of Hammerfest. The objective of the well was to prove petroleum in Middle and Early Jurassic reservoir rocks (Stø, Nordmela and Tubåen formations). The well encountered a gross gas column of about 200 metres in the Stø and Nordmela formations, with poorer reservoir quality than expected in both formations at the well position. Preliminary calculations of the size of the discovery are between one and four billion standard cubic metres (Sm3) of recoverable gas. Further delineation of the discovery will be considered. The well was not formation tested, but extensive data acquisition and sampling have been carried out. This is the first exploration well in production licence 608. The licence was awarded in the 21st licensing round in 2011. The well was drilled to a vertical depth of 3382 metres below the sea surface, and was terminated in the Fruholmen formation in the Late Triassic. Water depth is 344 metres. The well will now be permanently plugged and abandoned. Well 7219/8-2 was drilled by the West Hercules drilling facility which will now proceed to production licence 532 in the Barents Sea to drill wildcat well 7220/7-2 S, where Statoil Petroleum AS is the operator.

8 Jul 2013

Statoil targets new wildcat well in PL 608

The Norwegian Petroleum Directorate has granted Statoil Petroleum AS a drilling permit for wellbore 7219/8-2, cf. Section 8 of the Resource Management Regulations. The 7219/8-2 wellbore will be drilled from the West Hercules drilling facility at position 72°19` 17.33" N and 19°35´ 20.61" E. The drilling program for wellbore 7219/8-2 relates to drilling of a wildcat well in production licence 608. Statoil Petroleum AS is the operator with an ownership interest of 50 per cent and the other licensees are Eni Norge AS with 30 per cent and Petoro AS with 20 per cent. The production licence consists of block 7219/8. The production licence was awarded in the 21st licensing round in 2011. Wildcat well 7219/8-2 is the first exploration well in production licence 608. The permit is contingent upon the operator securing all other permits and consents required by other authorities prior to commencing drilling activities.

17 Apr 2013

'West Hercules' to drill 7220/5-2 wildcat in Barents Sea for Statoil

The Norwegian Petroleum Directorate (NPD) has granted Statoil Petroleum AS a drilling permit for wellbore 7220/5-2, cf. Section 8 of the Resource Management Regulations. Well 7220/5-2 will be drilled from the West Hercules drilling facility at position 72° 33' 40.29" north and 20° 23' 54.84" east. The drilling program for well 7220/5-2 relates to drilling of a wildcat well in production licence 532. Statoil Petroleum AS is the operator with an ownership interest of 50 per cent. The other licensees are Eni Norge AS with 30 per cent and Petoro AS with 20 per cent. The production licence consists of blocks 7219/9, 7220/4, 7220/5, 7220/7 and 7220/8. The production licence was awarded in the 20th licensing round in 2009. Wildcat well 7220/5-2 is the fourth exploration well in production licence 532. The permit is contingent upon the operator securing all other permits and consents required by other authorities before commencing drilling activities.

10 May 2012

Statoil launches ambitious exploration campaign in the Skrugard area

Statoil ASA, together with partners Eni Norge AS and Petoro AS, has established a plan for further exploration drilling in the Skrugard area. The exploration campaign will comprise four new prospects and is scheduled to commence late 2012. The objective is to follow up on the Skrugard and Havis discoveries and to test further upside potential in this area of the Barents Sea, including production licences PL532 and PL608. “We are very satisfied with our recent exploration achievements in the Barents Sea. In less than a year, we have made two substantial oil discoveries in PL532, proving 400-600 million barrels of recoverable oil. We have also drilled a successful appraisal well on Skrugard confirming volume estimates and collecting data for field development planning,” says Knut Harald Nygård, Statoil vice president for exploration in the Skrugard area. “We see good opportunities for further upside in the area, and have identified four new interesting prospects. In some of these we have observed flat spots of the same type as in the Skrugard and Havis discoveries.” The four prospects will be drilled back to back with the West Hercules drilling rig, which will be winterised to meet the weather conditions in the Barents Sea. The drilling campaign will start in PL532 with the Nunatak prospect due to be spud in December this year. Then the rig will proceed to the Skavl prospect located in the same licence, and thereafter to the Iskrystall prospect in the neighbouring licence PL608. The fourth prospect to be drilled will be announced at a later stage. Statoil’s ambition is to complete drilling of all four prospects by late spring/early summer 2013. “With the Skrugard and Havis discoveries, we are establishing a new strategic hub in the northernmost part of the Norwegian continental shelf. Proving additional volumes in the area would make the development even more robust,” says Erik Strand Tellefsen, Statoil vice president for Skrugard field development. Statoil is operator for production licences PL532 and PL608 with an ownership share of 50% in each. The licence partners in both licences are Eni Norge AS (30%) and Petoro AS (20%).

9 Sep 2011

Securing more rig capacity

Statoil has signed a contract with North Atlantic Norway to hire the West Hercules rig which can be used for exploration and production drilling internationally and on the Norwegian continental shelf (NCS). Statoil has signed an agreement with North Atlantic Norway Ltd (Norwegian Branch), a company in the Seadrill group, for hire of the West Hercules rig for use on exploration prospects and production licences. The semi-submersible rig will be deployed to start drilling from Q3 2012. “With its many capabilities, West Hercules will contribute to maintaining a sustainable activity level of exploration, and also to execute on our company’s ambitious exploration strategy in the years to come,” says Tim Dodson, Statoil’s executive vice president for Exploration. “Inclusion of this rig in our portfolio provides the necessary flexibility we are looking for and it supports our earlier communicated strategy of revitalising the NCS with high value barrels and deliver on our exploration programme globally. Acquiring this rig is an important contribution to securing Statoil’s rig capacity.” The daily rate for the rig is USD 490.000. A mobilisation fee of USD 50 million is also payable. The contract is for a fixed four-year period. Statoil has secured a one-year option on the same conditions. ”Statoil’s focus continues to be on bringing more modern and flexible rigs to our portfolio,” says Jon Arnt Jacobsen, Statoil’s chief procurement officer. “West Hercules is the first-available suitable rig which is already in operation. This, together with its advanced capabilities such as deep waters, high pressure/high temperature and completion, has prompted Statoil to act on this opportunity. This modern rig will be complementary to our portfolio and bring us more flexibility. It will be utilised on targeted wells internationally and on the NCS.” West Hercules is a sixth generation, high specification, deep water, semi-submersible drilling unit, built in 2008. It has a high load carrying capacity and an efficient drilling floor layout with improved safety and working environment measures. West Hercules can run parallel drilling operations and is designed with a dynamic positioning system and a water depth capacity up to 3,000 metres. West Hercules is expected to complete a three-year contract for Husky Oil China Ltd for operations off China in May 2012.

10 Jun 2010

Statoil completes efficient exploration drilling campaign offshore Newfoundland

Statoil, along with its partners, has finalized a 19-month exploration drilling program offshore Newfoundland. The purpose of the drilling program was to increase the robustness of the Bay du Nord project and to test new areas of the Flemish Pass Basin. Nine wells were drilled safely and efficiently by the Seadrill West Hercules in the Flemish Pass Basin, located approximately 500 kilometres east of St. John’s, Newfoundland and Labrador. The results have improved Statoil’s understanding of the frontier Flemish Pass Basin. The drilling program included four exploration wells in close vicinity of the 2013 Bay du Nord discovery, as well as three appraisal wells on the discovery. In addition, two exploration wells were drilled in areas outside the Bay du Nord discovery. The program was conducted in a harsh offshore environment; however, with strong operational and HSE performance, setting several records on drilling speed during the campaign. The drilling program has resulted in two discoveries of oil at the Bay de Verde and Baccalieu prospects in the Bay du Nord area, both of which add to the resource base for a potential development at the Bay du Nord discovery. The appraisal and near-field exploration of the Bay du Nord discovery has reduced key reservoir uncertainties and confirmed that the volumes are within the original volume range of the 300 to 600 million barrels of recoverable oil initially estimated by Statoil in 2013, but potentially towards the lower end of the range. “We are encouraged by the discoveries in the Bay de Verde and Baccalieu wells and the results of the appraisal wells,” said Erling Vågnes, senior vice president, Statoil Exploration, Northern Hemisphere. “Based on the improved understanding of the Flemish Pass Basin petroleum system, we are maturing further prospects that may add volumes to Bay du Nord.” “The Flemish Pass Basin offshore Newfoundland is a frontier area, where only 17 wells have been drilled in the entire basin – in an area that is 30,000 km2,”said Vågnes. “This drilling campaign has been critical both to maturing the Bay du Nord discovery as well as evolving our knowledge of the greater basin and Newfoundland offshore – which remains a core exploration area for Statoil.” The drilling program began in November 2014 and was extended by one month to incorporate the drilling of Baccalieu, a well on a licence awarded by the C-NLOPB in the 2015 land sale, which Statoil was able to progress from access to well-completion in four months. Statoil’s assessment of the commercial potential of the Bay du Nord discovery is ongoing. “The recent drilling program has been critical to Statoil’s continued assessment of Bay du Nord, and work is underway to evaluate the results related to proceeding with a potential Statoil-operated development in the Flemish Pass Basin,” said Paul Fulton, president, Statoil Canada.

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