Rig: Transocean Leader

Name Transocean Leader
Owner Transocean Offshore International Ventures Limited
Manager Transocean Offshore Deepwater Drilling Inc.
Rig Type Semisub
Sub Type Deepwater Floater
Jackup Type --
Max Water Depth (ft) 4500
Max Drill Depth (ft) 25000
Dimensions (ft) 253 x 220 x 131
Leg Length (ft) --
Competitive Yes

Current Location

Country UK
Region NWECS

Drilling Equipment

Drawworks Type National Oilwell Varco ADS 30Q
Drawworks HP 3000
Mud Pumps Type Continental Emsco FB-1600 Triplex
Top Drive National Oilwell Varco TDS-4H
Hookload Capacity (lbs) 1896000

Rig Construction Details

Rig Design Aker
Rig Model H-4.2
Year Built 1987
Country of Build South Korea
Yard Name Ulsan Shipyard
Group Yard Name Hyundai Heavy Industries (HHI)

Rig Contract Details

Operating Status Operational
Operator Hurricane Energy

Rig Images

News

13 Feb 2015

'Transocean Leader' enters Westcon shipyard for SPS

Westcon Yards (“Westcon”) in Olen, Norway was notified a week ago that it had successfully won a contract to carry out the SPS for the Transocean Legend unit. The original plan was for the unit to arrive in March, however, the unit arrived early on Saturday 14th February 2015. The SPS and additional inspection work on the Transocean Leader is expected to take up to 35 days to complete. However, the rig is projected to stay in the shipyard until May 2015, when it will mobilise to the UK sector of the North Sea to begin a new contract with EnQuest.

9 Feb 2015

Statoil discovers oil at Krafla North

Statoil Petroleum AS, operator of production licence 035, is in the process of completing the drilling of wildcat well 30/11-10 A. The 30/11-8 S discovery was proven in the summer of 2011 in Middle Jurassic reservoir rocks about 25 kilometres southwest of the field facility on the Oseberg Sør field in the northern part of the North Sea. After drilling the discovery well 30/11-8 S, the operator's resource estimate was between 2 and 9 million standard cubic metres (Sm³) of recoverable oil equivalents. Appraisal well 30/11-10 A was drilled into the reservoir north of discovery well 30/11-8 S. The purpose of the well was to delineate the 30/11-8 S discovery, increase proven in place oil resources and reduce the range of uncertainty in recoverable resources in Middle Jurassic reservoir rocks (the Tarbert formation). In addition, the licensees wanted to acquire more precise information about the depth of the structure, reservoir and fluid properties, as well as verify communication over the structure. The well encountered a total oil column of about 260 metres in the Tarbert formation, divided between the upper and middle Tarbert formation with columns of 110 and 150 metres, respectively. The reservoir rocks in the upper and middle Tarbert formation consist of 30 and 55 metres of sandstone of good reservoir quality. The preliminary size of the discovery is calculated at between 8 and 13 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 preliminary gas/oil ratio is 80-95 Sm3/Sm3. The licensees will consider developing the discovery along with other discoveries in the area. Well 30/11-10 A was drilled within production licence 035 on cost-sharing with production licence 272, which has the same licensees and ownership interests as licence 035. The well is the ninth exploration well in production licence 035, which was awarded in the 2nd licensing round in 1969. 30/11-10 A was drilled to a vertical depth of 3673 metres below the sea surface, and was terminated in the Ness formation in the Middle Jurassic. Water depth at the site is 105 metres. The well will be permanently plugged and abandoned. Well 30/11-10 A was drilled with the Transocean Leader drilling facility, which has thus completed its drilling assignments for Statoil.

22 Dec 2014

Statoil makes minor discovery at Krafla North well

Statoil Petroleum AS, operator of production licence 035, is about to complete drilling of wildcat well 30/11-10. The well proved oil. The well was drilled just north of the 30/11-8 S gas/oil/condensate discovery which was made in 2011, and about 25 kilometres southwest of the Oseberg South field in the northern part of the North Sea. The objective of the well was to prove petroleum in Middle Jurassic reservoir rocks (Tarbert, Ness and Etive formations). Well 30/11-10 encountered an oil column of a total of 80 metres in the upper to middle Tarbert formation and 20 metres in the Etive formation, both with generally poor reservoir properties. Mobile oil was encountered in the Ness formation in good quality reservoir rocks. Preliminary calculation of the size of the discovery is between one and three million Sm3 recoverable oil equivalents. The licensees will evaluate the discovery together with the development of other discoveries in the production licence. The well was not formation tested, but extensive data acquisition and sampling were carried out. This is the eighth exploration well in production licence 035. The licence was awarded in the 2nd licensing round in 1969. Well 30/11-10 was drilled to a vertical depth of 4054 metres below the sea surface, and was terminated in the Dunlin group in the Lower Jurassic. Water depth is 105 metres. Well 30/11-10 was drilled with the Transocean Leader drilling facility, which will drill sidetrack well 30/11-10 A after completing this well.

11 Dec 2014

Statoil receives consent to drill Krafla prospect

Statoil has received consent to carry out exploration drilling of well 30/11-11 in the Krafla prospect. Statoil is the operator for exploration licences 272 and 035 in block 30/11 in the northern part of the North Sea. Exploration well 30/11-11 is to be drilled in a prospect called Krafla. The area is around 24 kilometres south-west of Oseberg Sør and 130 kilometres from the nearest land, at Øygarden in Hordaland county. Water depth at the site is 106 metres. The drilling work is expected to last for 67 days.

21 Oct 2014

Statoil confirms discovery at Grane field

Statoil Petroleum AS, operator of production licence 169, is about to complete drilling of appraisal well 25/8-18 S. The 25/8-4 discovery was proven in 1992 by Norsk Hydro Produksjon AS. The reservoir is in the Heimdal formation from the Palaeocene Age. The discovery is located approx. eight kilometres northeast of the Grane field in the central part of the North Sea, and the size was originally estimated at about one million standard cubic metres (Sm 3) of recoverable oil. Appraisal well 25/8-18 S was drilled approx. 0.9 kilometres southeast of the 25/8-4 discovery well and about 180 kilometres west of Stavanger. The primary and secondary exploration targets for 25/8-18 S were to confirm oil volumes, the producibility properties and also to examine the discovery higher up in the structure in Palaeocene reservoir rocks (in the Heimdal formation and intra-Balder formation sandstone, respectively). 25/8-18 S encountered an approx. 25-metre oil column in the Heimdal formation with very good reservoir properties. The Heimdal formation is 55 metres thick in total. Gas was also encountered in a thin sandstone in the Balder formation. Preliminary estimates of the size of the discovery are now between 5 and 12 million Sm3 recoverable oil. The licensees will assess various development alternatives together with other discoveries in the area. Extensive data acquisition and sampling were carried out. This is the 14th exploration well drilled in production licence 169. Well 25/8-18 S was drilled to a vertical and measured depth of 1863 and 1867 metres below the sea surface, respectively, and was terminated in the Shetland Group in the Upper Cretaceous. The well will now be permanently plugged and abandoned. Water depth is 129 metres. The well was drilled by the Transocean Leader drilling facility, which will now carry out permanent plugging of a previous discovery well, 25/11-16 (Svalin), in the same production licence.

16 Oct 2014

Statoil to permanently plug Svalin exploration well

Statoil is the operator on the Svalin field, located in block 25/11 in the central part of the North Sea. The field has been developed using standardised solutions for subsea production. The plan for development and operation (PDO) was approved by the Ministry of Petroleum and Energy in November 2012, and production began back in June 2014. The Svalin field is around eight kilometres south-west of the Grane field. Water depth in the area is approximately 120 metres. The well stream from the field is processed at the Grane facility. Statoil has now received consent to use the ‘Transocean Leader’ mobile drilling facility to plug exploration well 25/11-16 permanently. The well currently has a temporary plug.

6 Oct 2014

PSA completes audit of 'Transocean Leader'

The PSA has carried out an audit of the Transocean rig company, in respect of logistics on the ‘Transocean Leader’ drilling facility. The ‘Transocean Leader’ mobile drilling facility was issued with an Acknowledgement of Compliance (AOC) by the PSA in December 2004. As a step in the follow-up of the rig owner's compliance with regulatory requirements and the preconditions for the AOC, the PSA has conducted an audit in the logistics domain. It covers materials handling, lifting equipment and the safe use thereof. The audit was carried out between 21st and 28th August 2014, in the form of a meeting with the rig owner, Transocean Offshore Ltd NUF (Transocean), followed by verification on board ‘Transocean Leader’ while it was operating for Statoil on the Njord field.

25 Sep 2014

PSA awards consent for 'Transocean Leader' to drill Krafla wells

The PSA has given Statoil Petroleum AS (Statoil) consent for exploration drilling using the ‘Transocean Leader’ mobile drilling facility in the North Sea. The consent covers the drilling of wildcat well 30/11-10 "Krafla North" and appraisal well 30/11-10 A "Krafla Main". It is planned to drill from the same surface location, with appraisal well 30/11-10 A being drilled as a sidetrack. The location is in the North Sea, 22 km from the Oseberg Sør facility and 2.2 km from the oil and gas discovery 30/11-8 S (Krafla), which was drilled in 2011. The earliest start to drilling is set at mid-October 2014. The activity is estimated to last 78 days. ‘Transocean Leader’ is a semi-submersible mobile drilling facility delivered in 1987 by Hyundai Heavy Industries of Korea. The facility is operated by Transocean and received Acknowledgement of Compliance (AoC) from the PSA in December 2004.

26 Aug 2014

Statoil given consent to use 'Transocean Leader' to drill 25/8-18 S well

Statoil has received consent to carry out exploration drilling using the ‘Transocean Leader’ mobile drilling facility to drill well 25/8-18 S in the central North Sea. The well is located 12 km north-west of the Grane field and around 164 km from the nearest land at Utsira in Rogaland. Water depth at the site is 159 metres. Drilling is estimated to last for 33 days. ‘Transocean Leader’ is operated by Transocean. The facility was issued with an Acknowledgement of Compliance (AoC) by the PSA in December 2004.

23 Jun 2014

Statoil prepares to permanently plug Njord well

Statoil has received consent to use the ‘Transocean Leader’ mobile drilling facility for permanent plugging of well 6407/7-3 on the Njord field. Njord is an oil field in the Norwegian Sea, around 30 km west of Draugen, in approx. 330 metres of water. Njord has been developed using a steel semi-submersible drilling, accommodation and production facility. Expected start-up of the operation is July 2014, with a duration of approx. 30 days. ‘Transocean Leader’ is a semi-submersible drilling facility of the Aker H-4.2 type, built in 1987 by Hyundai in South Korea and modified in 1997. It is registered in the Marshall Islands and classified by DnV. The facility was issued with an Acknowledgement of Compliance (AOC) by the PSA in December 2004.

11 Apr 2014

Statoil makes gas and oil discovery near Valemon field in Norway

Statoil Petroleum AS, operator of the production licences in the Valemon Unit, has concluded the drilling of wildcat wells 34/10-54 S and 34/10-54 A. The wells proved oil and gas. The wells were drilled about six kilometres north of the Valemon field in the northern part of the North Sea. The primary exploration target for the wells was to prove petroleum in a separate fault block in Middle and Lower Jurassic rocks (the Brent Group). The secondary exploration target was to prove petroleum in Lower Jurassic reservoir rocks (the Cook formation and the Statfjord group). Well 34/10-54 S encountered a 74-metre gross gas column in the Tarbert and upper Ness formations in the Middle Jurassic, of which 20 metres in sandstone with poor to good reservoir quality. In the middle and lower Ness formation, a 45-metre oil column was encountered, of which 16 metres in sandstone with good reservoir quality. In the Etive formation in the Middle Jurassic, seven metres of sandstone with good reservoir quality was encountered, but this is aquiferous. In the immediately underlying reservoir rocks, in the Rannoch formation in the Middle Jurassic, a 38-metre condensate column in sandstone with poor reservoir quality was encountered. In addition, condensate was encountered in Middle Jurassic sandstone with poor reservoir quality in the Cook formation. Well 34/10-54 A encountered an approx. 100-metre gross gas column in sand of unspecified Jurassic Age and in the Brent Group, of which 40 metres in sandstone with poor reservoir quality. In the Nansen formation from the Lower Jurassic, a 38-metre gas column was encountered, of which 32 metres in sandstone with poor to good reservoir quality. In the Eiriksson formation from the Lower Jurassic, a 77-metre gas column was encountered, of which 31 metres in sandstone with poor reservoir quality. Petroleum was also encountered in Middle Jurassic and Lower Jurassic sandstone with poor reservoir quality in the Cook and Raude formations, but it is currently unclear whether this is oil, condensate or gas. No petroleum/water contact was encountered in the wells. The wells were not formation tested, but comprehensive data acquisition and sampling were carried out. Preliminary estimates of the total size of the discoveries are between 3 and 12 million Sm³ of recoverable oil equivalents. The Valemon Unit licensees will consider tying the discoveries in to the Valemon field. 34/10-54 S and 34/10-54 A were drilled to vertical depths of 4229 and 4247 metres below the sea surface, respectively, and were terminated in the Burton formation and the Statfjord group in the Lower Jurassic, respectively. Water depth at the site is 140 metres. The wells have been permanently plugged and abandoned. Wells 34/10-54 S and -54 A were drilled by the Transocean Leader drilling facility, which will now proceed to PL073 to drill production well 6407/1-A-3, where Statoil Petroleum AS is the operator.

19 Aug 2013

Statoil discover gas and condensate with Smorbukk North well in Norway

Statoil Petroleum AS, operator for production licence 479, is in the process of completing the drilling of wildcat well 6506/9-3. The well was drilled about 5 km north of the Åsgard field in the Norwegian Sea. The primary exploration goal for the well was to prove petroleum in reservoir rocks of the Middle Jurassic Age (Garn, Ile and Tofte formations). The secondary exploration goal was to prove petroleum in Lower Jurassic reservoir rocks (Ror, Tilje and Åre formations). The well encountered a gas/condensate column of about 40 metres in a down-to situation in the Garn formation. In addition, a thin gas/condensate column was encountered in the Ile formation. The reservoir characteristics are good in the Garn formation, while they are somewhat poorer than expected in the Ile formation. A preliminary estimate of the size of the discovery in the Garn formation is between 4 and 7.5 million Sm3 of recoverable oil equivalents. Tie-in of the discovery to the Åsgard field 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 479. The licence was awarded on 29 February 2008 in connection with APA 2007. The well was drilled to a vertical depth of 4692 metres below the sea surface and completed in the Åre formation in the Lower Jurassic. The sea depth is 302 metres. The well will be permanently plugged and abandoned. Well 6506/9-3 was drilled from the Transocean Leader drilling facility, which will be going to production licence 050ES in the North Sea to drill wildcat well 34/10-54S, where Statoil Petroleum AS is the operator.

14 Aug 2013

Statoil set to drill two wildcat wells with 'Transocean Leader' semisub

The Norwegian Petroleum Directorate has granted Statoil ASA a drilling permit for wellbores 34/10-54 S and 34/10-54 A, cf. Section 8 of the Resource Management Regulations. Wellbores 34/10-54 S and 34/10-54 A will be drilled from the Transocean Leader drilling facility at position 61º 07`32.70” N and 02º 18´35.5" E after completion of drilling of the wildcat well 6506/9-3 for Statoil ASA in production licence 479. The drilling program for wellbores 34/10-54 S and 34/10-54 A relates to drilling of a wildcat well in production licence 050 ES, Valemon Unit. Statoil ASA is the operator with an ownership interest of 57 per cent. The other licensees are Petero AS (30 per cent) and Centrica Resources (Norge) AS (13 per cent). The area in this permit consists of the block 34/10. Production licence 050 ES was awarded on 11 April 2012 as an addition to the third licensing round. The permit is contingent upon the operator securing all other permits and consents required by other authorities prior to commencing drilling activities.

5 Jun 2013

Statoil targets new exploration well north of Asgard field

The Norwegian Petroleum Directorate has granted Statoil Petroleum AS a drilling permit for well 6506/9-3, cf. Section 8 of the Resource Management Regulations. Well 6506/9-3 will be drilled from the Transocean Leader drilling facility in position 65°15'4.99" north and 6°54'15.66" east after completion of the drilling of production well 31/2-K-13 BY2H for Statoil Petroleum AS in production licence 054 in the Troll field. The drilling program for well 6506/9-3 concerns the drilling of a wildcat well in production licence 479. Statoil Petroleum AS is the operator with an ownership interest of 40.95 per. The other licensees are Eni Norge AS with 19.6 per cent, Petoro AS with 14.95 per cent, Exxon Mobile E&P Norway AS with 14.7 per cent and Total E&P Norge AS med 9.8 per cent. The area in this licence consists of parts of blocks 6506/9 and 6506/12. The well will be drilled about seven kilometres north of Åsgard in the Norwegian Sea. Production licence 479 was awarded on 29 February 2008 in APA 2007 on the Norwegian shelf. This is the first well drilled in the licence. The permit is contingent upon the operator having secured all other permits and consents required by other authorities before the drilling starts.

21 Oct 2011

Doubling of Aldous volumes

Statoil ASA (OSE: STL, NYSE: STO), together with partners Petoro AS, Det norske oljeselskap ASA and Lundin Norway AS, has confirmed significant additional volumes in its appraisal well in the Aldous Major South discovery (PL265) in the North Sea. The results of appraisal well 16/2-10 have increased production license PL265 estimates to between 900 million and 1.5 billion barrels of recoverable oil equivalent. This is a doubling of the previously announced PL265 volumes of between 400 and 800 million barrels of oil equivalent. It has previously been confirmed that there is communication between Aldous in PL265 and Avaldsnes in PL501, and that this is one large oil discovery. “Aldous/Avaldsnes is a giant, and one of the largest finds ever on the Norwegian continental shelf. Volume estimates have now increased further because the appraisal well confirms a continuous, very good and thick reservoir in Aldous Major South,” says Tim Dodson, executive vice president for Exploration in Statoil. Final data show that the oil column in appraisal well 16/2-10 is approximately 60 metres. These data also confirm that the reservoir is of the same, excellent quality as in the Aldous Major South discovery well 16/2-8. This is the main reason for the substantial upward revision of PL265 volumes. The Aldous/Avaldsnes discovery extends over a large area of ??approximately 180 square kilometres, and there is considerable variation in both reservoir thickness and oil column height in the structure. Additional appraisal wells will be drilled in both licenses. Statoil will await the results from these wells before providing updated and more accurate volume estimates for the combined discovery. After completion of the appraisal well, the Transocean Leader drilling rig will move to the Troll field in the North Sea. Aldous Major South is situated in production license PL265 in the North Sea, and appraisal well 16/2-10 was drilled 4.2 kilometres north of the 16/2-8 discovery well. Statoil is the operator and has a 40% interest in PL265. The partners are Petoro AS (30%), Det norske oljeselskap ASA (20%) and Lundin Norway AS (10%). Well 16/2-10 is the seventh exploration well in PL265. The license was awarded in the North Sea Awards 2000. Avaldsnes is located in production licence PL501. Lundin Norway AS is the operator with a 40% interest, while partners Statoil and Maersk have 40% and 20% interests, respectively.

18 Oct 2011

Discovery in Aldous appraisal well

Statoil ASA is, together with partners Petoro AS, Det norske oljeselskap ASA and Lundin Norway AS, about to complete drilling of appraisal well 16/2-10 in the Aldous Major South structure (PL 265) in the North Sea. Drilled by Transocan Leader drilling rig, appraisal well 16/2-10 has proven an oil column in a range between 50 and 55 metres in Jurassic sandstone. Statoil has earlier communicated preliminary volumes for the Aldous structure in PL 265 to be between 400 and 800 million barrels of recoverable oil equivalent. Statoil will present updated volume estimates when the well data have been fully analysed. Appraisal well 16/2-10 is located 4.2 kilometres north of discovery well 16-2/8 in the Aldous Major South structure on the Utsira Height in the North Sea. Well 16/2-10 is the seventh exploration well in the licence. Aldous Major South is located in PL 265 where Statoil is operator (40 percent) and the partners are Petoro (30), Det norske oljeselskap (20) and Lundin (10).

22 Sep 2011

Small discovery on Aldous Major North

Statoil, together with partners Petoro AS, Det norske oljeselskap ASA and Lundin Norway AS, has drilled the Aldous Major North prospect (PL 265) in the North Sea. Samples taken from well 16/2-9S, drilled by the rig Transocean Leader, have proved a column of oil of up to 8 metres in formations dating from the Upper Jurassic period. Due to the limited reservoir quality, the partnership will consider further exploration drilling on Aldous Major North in order to clarify the structure’s potential. Well 16/2-9S was drilled some 12 kilometres north of the Aldous Major South oil discovery (16/2-8). Aldous Major North and Aldous Major South are two independent structures in the PL 265 licence and there was higher uncertainty related to well 16/2-9S in the northern part of the licence. “Statoil has previously communicated that the combined Aldous Major South and Avaldsnes discoveries may constitute an oil structure of between 500 and 1200 million barrels of recoverable oil equivalents, and we stand firm on this estimate,” says Gro G. Haatvedt, Statoil’s senior vice president for exploration on the Norwegian continental shelf. Following completion of well 16/2-9S on the Aldous Major North prospect, Transocean Leader will return to Aldous Major South to drill appraisal well 16/2-10. “An appraisal well on Aldous Major South demonstrates that we have great faith in the area’s potential and that the partnership would like to see speedy clarification of the total resource potential in order to secure the rapid development of this discovery,” says Haatvedt. Aldous Major North and Aldous Major South are located in production licence 265, where Statoil is operator (40%) along with partners Petoro (30%), Det norske oljeselskap (20%) and Lundin (10%).

8 Aug 2011

High-impact discovery in the North Sea

Statoil ASA and partners Petoro AS, Det norske oljeselskap ASA and Lundin Norway AS have made a high-impact oil discovery on the Aldous Major South prospect (PL 265) in the North Sea. Well 16/2-8, drilled by the Transocean Leader drilling rig, has identified an approximately 65-metre oil column in Jurassic sandstone. The acquired data confirm that this is a reservoir of excellent quality. Statoil has previously described the well as a high-impact well (*), and the result confirms Statoil’s belief in the exploration potential on the Norwegian continental shelf in line with what was communicated at the Capital Markets Day event in New York in June. Preliminary volumes are estimated to be between 200 and 400 million barrels of oil equivalent (boe) for this part of the structure in PL 265, and Statoil expects additional upside in the licence both north and south of the discovery. Aldous Major South is located west of Lundin’s Avaldsnes discovery (licence PL 501), where Statoil has a 40% stake, and some 35 kilometres south of the Statoil-operated Grane field. Well 16/2-8 indicates the same oil-water contact as in the Avaldsnes discovery well, which suggests the likelihood of communication between the two structures. The Avaldsnes discovery encountered a 17-metre oil column. Statoil will update its total resource estimate for the area when the wells are completed and the data analysed. “Aldous Major South is a considerable oil discovery in one of Statoil’s core areas. Together with the Avaldsnes discovery this may allow for a new stand-alone development in the North Sea. As the largest resource owner our priority is to find the optimal solution for the area, adding maximum value to all partners,” says Gro G. Haatvedt, Statoil’s senior vice president for Exploration on the Norwegian continental shelf. After completing this well Transocean Leader will start drilling the Aldous Major North well. This well also has a considerable volume potential. The partnership is planning two appraisal wells in PL 265 next year and Statoil has secured rig capacity for this. The result of the ongoing drilling of the Lundin-operated well (well 16/2-7) in the Avaldsnes structure will help further clarify the area’s potential. Aldous Major South is located in licence 265. Statoil is the operator and has a 40% interest. The other partners are Petoro (30%), Det norske oljeselskap (20%) and Lundin (10%).

16 May 2011

LUNDIN PETROLEUM SPUDS SKALLE EXPLORATION WELL IN BARENTS SEA

Lundin Petroleum AB (Lundin Petroleum) is pleased to announce that drilling of exploration well 7120/2-3 in PL438 has commenced. The well will target the Skalle prospect, which is situated to the north of the Snøhvit field in the Barents Sea, offshore Norway. The main objective of well 7120/2-3 is to test Cretaceous and Jurassic/Triassic age sandstones of a multiple target structure. Lundin Petroleum estimates the Skalle prospect contains unrisked, gross, prospective resources of 250 million barrels of oil equivalent (MMboe). The planned total depth is 2,650 meters below mean seal level and the well will be drilled using the semi-submersible drilling rig Transocean Leader. Drilling is expected to take approximately 60 days. Lundin Petroleum is the operator of PL438 with 25 percent interest. Partners are RWE Dea Norge AS with 20 percent interest, Petoro AS with 20 percent, Spring Energy with 17.5 percent and Talisman Energy Norge with 17.5 percent interest.

10 Feb 2011

Production and exploration rig chartered

Statoil has awarded Transocean a contract for hire of the Transocean Leader drilling unit to be used on our licenses on the Norwegian continental shelf. As operator of several licences Statoil has awarded a contract to Transocean for use of the semi-submersible Transocean Leader rig for drilling in Norway. Plans call for the rig to be used for production and exploration drilling on the Norwegian continental shelf during the contract period. “We are pleased with securing Transocean Leader for a new contract period. Chartering this rig will also contribute to Statoil's deepwater capacity being able to operate on water depths down to 1500 meters”, says newly appointed chief procurement officer in Statoil, Jon Arnt Jacobsen. The contract period is three years, starting in 2012, and includes a one-year option following the completion of the drilling programme. “The key to uphold present production level on the Norwegian continental shelf towards 2020 is enhanced recovery from existing fields, quick and efficient development of new fields and an active exploration programme. To implement these measures, it is crucial that we secure necessary rig capacity”, says executive vice president for Development & Production Norway, Øystein Michelsen. The Transocean Leader is a Aker H-4.2 self-propelled semi-submersible drilling unit capable of operating in harsh environments and water depths up to 4500 feet, built in 1987. The drilling unit has previously been chartered by Statoil for use on the Statfjord satellites in the North Sea and it is currently under a three-year contract with Statoil in the same area.

20 Nov 2008

Small additional gas discovery in the Norwegian Sea

StatoilHydro has made a small additional gas discovery during drilling of an exploration well north-west of Sandnessjøen in mid-Norway. As operator of production licence 218 StatoilHydro is currently concluding the drilling of exploration well 6707/10-2 A. The well has been drilled south-east of the Luva gas discovery, 280 kilometres north-west of Sandnessjøen. The purpose of the well was to confirm petroleum in Upper Cretaceous reservoir rock. The well was a planned sidetrack to a deeper prospect following the confirmation of 8–14 billion cubic metres (Sm3) of gas during drilling of well 6707/10-2 S in October 2008 in a prospect called Haklang. The well confirmed a 38 metre gas column in the lower part of the Nise formation. The confirmed resources are small, and it is too early to say whether the discovery is commercially viable when seen in connection with a possible field development of Haklang and the nearby Luva and Snefrid South finds. ”This year we have drilled three exploration wells in the vicinity of Luva and gas has been found in all wells,” says Frode Fasteland, who is StatoilHydro’s head of exploration in the Norwegian Sea. ”This well confirmed a new exploration model, and even if the find is small it offers exciting opportunities for further exploration in this part of the Norwegian Sea,” says Mr Fasteland. This is the fourth exploration well in production licence 218, which was awarded in the 15th licensing round in 1996. The well was drilled to a vertical depth of 4,325 metres below sea level and concluded in lower parts of the Nise formation in Upper Cretaceous rock. The water depth in the area is 1,248 metres. The well was drilled by the Transocean Leader drilling rig, which is now drilling exploration well 6605/1-1 in production licence 328 operated by StatoilHydro. The partners in production licence 218 are: StatoilHydro ASA (operator) (75%), ExxonMobil Exploration & Production Norway AS (15%) and ConocoPhillips Skandinavia AS (10%).

25 Aug 2008

Gas discovery in the Norwegian Sea

Gas has been proven in the deep-water Snefrid South prospect near the Luva discovery in the Norwegian Sea. exploration well 6706/12-1 in production licence PL218 in the Norwegian Sea was successful. The well is located west of the Luva gas discovery, some 290 kilometres west of Sandnessjøen. The purpose of the well was to confirm the existence of petroleum in Late Cretaceous reservoir rocks in a prospect named Snefrid South. The well confirmed the existence of a 70-metre gas column with good reservoir qualities in the Nise formation. Core drilling was performed, and fluid and pressure samples were collected. The discovery is estimated to contain some 4 billion standard cubic metres of recoverable gas. ”I am pleased that the result met with our expectations and that dry gas was confirmed in a reservoir with good reservoir qualities,” Dodson says. Snefrid will be developed in combination with the Luva discovery. Dodson emphasises that the drilling of the exploration well in the Snefrid South prospect is an important step in order to accelerate the development of the Luva discovery, which was made by BP in 1997. The well was drilled to a vertical depth of 3925 metres below the sea level and completed in the lower parts of the Nise formation in 1265 metres of water. The well will now be permanently plugged and abandoned. Well 6706/12-1 was drilled by the Transocean Leader drilling rig, which will now drill exploration well 6707/10-2 S in the same production licence. StatoilHydro (operator) has an interest of 75 percent in PL 218. The partners are ExxonMobil (15 percent) and ConocoPhillips (10 percent).

4 Jul 2008

Exploration on Stetind

The drilling of exploration well 6605/8-2 in a structure named Stetind in the Norwegian Sea is being completed without any recoverable hydrocarbons being confirmed. The well was drilled by the Transocean Leader drilling rig. After completing this well the rig will move on to production licence 218 in the Norwegian Sea for the drilling of exploration well 6706/12-1, operated by StatoilHydro.

29 Aug 2007

New Norwegian Sea gas find

Statoil has discovered gas in the Midnattsol prospect in the Norwegian Sea. The find was made in exploration well 6405/10-1 in production licence 281 where the company is operator. Statoil has discovered gas in the Midnattsol prospect in the Norwegian Sea. The find was made in exploration well 6405/10-1 in production licence 281 where the company is operator. "It's positive that a new gas find has been made in a deepwater area of the Norwegian Sea," says Frode Fasteland, acting head of exploration on the Norwegian continental shelf. Midnattsol is located some 40 kilometres north of the Ormen Lange field and 30 kilometres south of the Ellida find. The well was drilled in a water depth of 928 metres to a total depth of 3,158 metes below sea level. Gas was encountered in a reservoir of the late Cretaceous. Core samples have been taken and an extremely thorough data acquisition programme carried out. The collected data will be analysed to estimate the discovery's size and production characteristics. It is too early at this stage to declare the find commercial. "We have great faith in the Norwegian Sea and will continue to have a high level of activity in the area," says Mr Fasteland. "Future activities include five exploration wells in the deepwater area in 2008. Three of them are Statoil-operated." Midnattsol will be permanently plugged and abandoned. The Transocean Leader drilling rig will now be taken over by Eni. The licensees in production licence 281, blocks 6405/4, 7 and 10 are Statoil with a 50% interest, EON Ruhrgas (20%), Petoro (20%) and CononoPhillips with 10%.

1 Sep 2006

New rig agreement with Transocean

A 30-month charter worth some NOK 2.3 billion (USD 378 million), taking effect from the end of 2008, has been awarded by Statoil to rig contractor Transocean for its Transocean Leader drilling unit. Transocean Leader will be used mainly for exploration and production drilling in the Tampen and Halten/Nordland areas of the Norwegian continental shelf (NCS). "This contract will be very important in maintaining Statoil's exploration ambitions in the Norwegian Sea, and the rig will contribute to increased production drilling in the group's core areas," says Bjarte Ydstebø, vice president for rig strategy in Statoil. The semi-submsersible Transocean Leader is a fourth-generation Aker H-4.2 unit, built in 1987 to work on the NCS. It is specially-designed to operate in greater water depths than traditional rigs and is therefore very suitable for drilling in the Norwegian Sea.

27 Mar 2006

Oil and gas find on Gudrun

Oil and gas have been proven on the Gudrun structure in the Sleipner area of the North Sea by operator Statoil. The results from appraisal well 15/3-8 confirm the estimates of Statoil that the Gudrun structure contains at least 150 million barrels of recoverable oil equivalent. Oil, gas and condensate have earlier been proven in the structure. The appraisal well was drilled to find out if there were enough hydrocarbons in Gudrun to develop the structure. "Data from the well confirms that the Gudrun discovery is substantial," says Lars Jan Jaarvik, exploration manager for Troll/Sleipner. "Statoil is now looking at various development alternatives." Gudrun can be developed with a platform or a subsea solution. Production can be transported to a Norwegian or UK installation for further processing and export. This will be clarified later in connection with the development plans. The Gudrun structure is located in production licence 025, some 40 kilometres north of the Sleipner area and 13 kilometres east of the border between the Norwegian and UK sectors of the North Sea. The well was drilled by the Transocean Leader rig in 109 metres of water to a total depth of 4,570 metres below sea level, terminating in late Jurassic sediments. The well will be permanently plugged. Oil and gas were proven in late Jurassic sands. Statoil has completed two successful productions tests, both with a maximum production rate of between 6,000 and 7,000 barrels of oil equivalent (1,000-1,200 cubic metres) per day through a 3/4 inch nozzle opening. The Transocean Leader is moving to the Skinfaks and Rimfaks fields in the North Sea to drill production wells. Statoil has a 46.8 per cent interest in production licence 025. The other licensees are Marathon with 28.2 per cent, Gaz de France with 12.5 per cent and BP with 12.5 per cent.

11 Oct 2005

Rig secured for exploration and production

A charter worth almost NOK 900 million to use the Transocean Leader rig in both exploration and production drilling has been secured by Statoil. Due to come into force in September 2007, this one-year contract represents a direct extension of an existing charter with rig contractor Transocean. “Transocean Leader will secure future volumes of oil and gas for installations in the Tampen area of the North Sea,” says sector manager Øyvin Jensen. The rig has been drilling for Statoil since the summer of 2004, and is currently working in an exploration collaboration which also involves Shell and Hydro.

21 Jan 2005

Drilling job for Skinfaks and Rimfaks

A contract worth some NOK 550 million for drilling production wells on the Skinfaks and Rimfaks fields in the North Sea has been awarded by Statoil to Transocean. Due to be performed by the Transocean Leader semi-submersible, the work embraces at least three wells and is expected to take about 225 days. In addition, the rig will be used for roughly 130 days to carry out jobs on Statoil’s nearby Gullfaks development. All these fields lie in the Tampen area. A total of eight production wells are planned on Skinfaks, which was proven in 2002 and comprises several small reservoirs, and on Rimfaks. The latter has been on stream since 2000 through a tie-in to the Gullfaks A platform. Further development of Rimfaks will improve recovery from this discovery. Scheduled to come on stream in November 2006, the present project involves a tie-back to Gullfaks C via existing infrastructure. The plan for development and operation (PDO) of Rimfaks and Skinfaks was submitted to the Norwegian authorities on 8 December 2004. The Transocean contract is conditional on acceptance by the partners and on approval of the PDO by the Ministry of Petroleum and Energy. A decision from the latter is expected in February/March.

12 Feb 2004

Transocean Leader chartered

A 15-month charter worth some NOK 600 million has been awarded by Statoil to rig contractor Transocean for its Transocean Leader drilling unit. The group also has an option to extend the hire period to cover an additional well with an estimated duration of 90 days, which would add NOK 110 million to the value of charter. According to Tore Lea, head of rig management in Statoil, the whole charter period is secured against an obligatory work programme. However, the sequence of prospects to be drilled has not been finally clarified. Due to start work for the group in May, the semi-submersible is currently located in the UK. It will be modified to prepare for operation on the Norwegian continental shelf (NCS). Transocean Leader is a fourth-generation Aker H-4.2 unit, built in 1987 to work on the NCS. Statoil chartered it most recently in 1999 for use on the Statfjord satellites in the North Sea.

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