Rig: Eirik Raude

Name Eirik Raude
Owner Ocean Rig 2 Inc.
Manager Transocean
Rig Type Semisub
Sub Type Ultradeep Water
Jackup Type --
Max Water Depth (ft) 10000
Max Drill Depth (ft) 30000
Dimensions (ft) 391.68 x 278.88 x 44.29
Leg Length (ft) --
Competitive Yes

Current Location

Country --
Region --

Drilling Equipment

Drawworks Type Continental Emsco Electrohoist IV
Drawworks HP 4000
Mud Pumps Type Continental Emsco FC-2200 Triplex
Top Drive National Oilwell Varco HPS-1000
Hookload Capacity (lbs) 2000000

Rig Construction Details

Rig Design Trosvik
Rig Model Bingo 9000
Year Built 2002
Country of Build China (PRC)
Yard Name Dalian No 1 Production Yard (DSIC)
Group Yard Name China Shipbuilding Industry Company Limited (CSIC)

Rig Contract Details

Operating Status Retired
Operator

News

12 Feb 2016

Termination of drilling contract

Premier and Noble Energy entered into a contract with Ocean Rig UDW (“Ocean Rig”) on 3 June 2014, for the provision of the Eirik Raude drilling unit for an exploration drilling campaign in the Falkland Islands. Following a number of material operational issues with the Eirik Raude rig during the term of the contract to date, Premier and Noble Energy issued a termination notice to Ocean Rig on 11 February 2016, terminating the contract with immediate effect. As a result, Premier will no longer be drilling the Chatham exploration well during the current campaign. However, we are in discussions with the Falkland Islands Government regarding the possibility of drilling this prospect in the future.

23 Nov 2015

Isobel Deep Re-drill Well Spud

Falkland Oil and Gas Limited (AIM:FOGL), the oil and gas exploration company focused on its extensive license areas to the North, South and East of the Falklands islands, is pleased to announce that the 14/20-2 ‘Isobel 2’ well (the "Well") was spudded, by Premier Oil as operator, on 21 November 2015. The well is located on licence PL004a , in which FOGL has a 40% working interest, and lies approximately 4 km away from the 14/20-1 Isobel Deep oil discovery. The well will target the Isobel Deep reservoir and is a re-drill of the 14/20-1 well drilled earlier this year, which failed to reach Total Depth owing to operational issues. The well will test the F3 fan systems, which are mapped as entering the basin from the south east margin and comprise a sequence of stacked reservoirs. In addition to Isobel Deep, the well will also penetrate four other fans within the complex, comprising: Elaine South, Isobel, Doreen and Irene. The Elaine/Isobel fan complex, based on the operator’s estimates, has multiple reservoir targets and gross, mean un-risked resources of 400 million barrels of oil. A further release will be issued once the well has been completed and this is expected to be in January 2016. FOGL is fully carried through the costs of this well by Premier Oil and Rockhopper Exploration.

29 Oct 2015

53/02-01 Humpback exploration well results

Falkland Oil and Gas Limited (AIM:FOGL), the exploration company focused on its extensive licence areas to the North, South and East of the Falkland Islands, announces the results from the 53/02-01 Humpback exploration well and also, notes the announcement from the Operator, Noble Energy made at 20:30 on 28 October 2015. The Humpback well was drilled to a total depth of 5,136 meters (measured depth). The well encountered non-commercial quantities of oil and gas within a number of sandstone intervals, including the main APX-200 target. All of the pre-drill targets were penetrated close to prognosis in the well. An additional 25 meters of sandstone was encountered below the APX-200 bringing the total in the well to 65 meters. The deeper sandstones, exhibit only moderate porosity (10% to 15%) and low hydrocarbon saturations. For a number of operational reasons, it was not possible to obtain fluid samples from any of the hydrocarbon bearing zones in the well. FOGL will now evaluate these results in more detail and assess the impact on the prospectivity of the Diomedea fan complex and the rest of the southern licences. The results do however demonstrate a working hydrocarbon system and Humpback was only one of a number of geological plays within the Fitzroy sub-basin. Importantly the results will allow calibration of the 3D seismic data and this may facilitate the mapping of higher quality sands elsewhere within the large area covered by 3D seismic. Once operations have been completed on Humpback, the Eirik Raude rig will return to the North Falklands Basin to drill a second well on the Elaine/Isobel fan complex. The Elaine/Isobel fan complex, based on the operator’s estimates, has multiple reservoir targets and gross mean un-risked resources of 400 million barrels of oil. A further announcement will be made on the commencement of this well.

7 Oct 2015

Ocean Rig Announces Fleet Update

The Eirik Raude is currently completing its third well in a six-well program in the Falklands and is now expected to remain employed in the Falkland Islands into January of 2016. Currently, there are no further prospects of employment for the rig in the Falkland Islands and if no employment is found the rig will be cold stacked and the Company will consider all its options including disposing or scrapping the unit.

25 Sep 2015

North Falkland Basin Exploration Update

Rockhopper Exploration plc (AIM: RKH), the oil and gas exploration and production company with interests in the North Falkland Basin and the Greater Mediterranean region, is pleased to announce that agreement has been reached to drill a further well on the Isobel/Elaine complex. The re-drill well will target the Isobel Deep reservoir which was oil bearing in well 14/20-1, but could not be logged or sampled for mechanical reasons. This new well will be drilled a suitable distance (approximately 4km) from the original well bore and is also expected to encounter additional reservoir targets in the Elaine South and Isobel Shallow Fans. This well will replace the Jayne East well in the current drilling campaign (subject to the final regulatory approvals). As part of the agreement to drill a further well on the Isobel/Elaine complex, Rockhopper has reached agreement with Falkland Oil & Gas Limited ("FOGL") on the terms of compensation for not drilling the Jayne East well. Under the agreement, Rockhopper will pay FOGL $4.0 million ($2.0 million immediately with the balance expected to be paid later in 2016). As per the original farm out agreement, Rockhopper and Premier Oil will carry FOGL on its 40% equity share of the re-drill well costs. The rig, which is currently drilling to the south of the Falkland Islands, is expected to return to the North Falkland Basin in mid to late October 2015.

15 Jun 2015

Noble Energy spuds Humpback well

Falkland Oil and Gas Limited (“FOGL”), the oil and gas exploration company focused on its extensive licence areas to the North, South and East of the Falklands islands, is pleased to announce that the 'Humpback' exploration well, (the "Well") was spudded on 13th June 2015. The well is located on licence PL012 in which FOGL has a 52.5% working interest and will target the Humpback prospect. Humpback is located within a cluster of similar prospects, in the Fitzroy sub-basin, which have a total, combined, prospective resource of over one billion barrels of oil. The well will test multiple stacked reservoirs within the Cretaceous Diomedea fan complex. The Humpback well is located in a water depth of approximately 1,260 metres and is expected to reach a total depth of 5,350 metres. The well is anticipated to take approximately 65 days to drill. A further release will be issued once logging is completed. FOGL is partially carried through the costs of this well by Noble Energy (Licence Operator) and has a paying interest of 27.5%.

28 May 2015

Premier announces discovery at Isobel Deep

Premier Oil is pleased to announce an oil discovery at the Isobel Deep exploration well 14/20-1 in the North Falkland Basin, approximately 30km south of the Sea Lion field. The Isobel Deep exploration well has been drilled to a depth of 8,289 feet reaching top reservoir on prognosis. The bottom 75 feet of the well consists of oil bearing F3 sands. These sands were at a higher than expected reservoir pressure and this resulted in an influx into the well. As part of the operations to remove the influx, oil was recovered from the well and appears similar in nature to Sea Lion crude. As a result of the new geological information it has been decided to suspend operations on the well and release the rig to drill in the South Falkland Basin. The rig is expected to return to continue operations in the North Falklands Basin in August. Premier is now considering the optimal appraisal programme for the Elaine/Isobel complex in PL004.

19 May 2015

Potential oil shows at Isobel Deep

Rockhopper Exploration plc (“Rockhopper”), the oil and gas exploration and production company with interests in the North Falkland Basin and the Greater Mediterranean region, is pleased to provide the following update ahead of the Company's AGM today in relation to the Isobel Deep Well. Following the penetration of a sand interval with suspected elevated formation pressure and oil shows, the operator (Premier Oil) has decided to set a cement plug over this interval and run the contingent 9 5/8" casing string in the shale section above, prior to drilling through the prognosed Isobel reservoir interval to the well TD (“Total Depth”). The contingent casing string will enable additional flexibility while drilling and evaluating the target formation. This scenario had been anticipated and the additional 9 5/8" casing is already on the rig. The presence of oil shows is not necessarily indicative of net pay and conclusive results for the well will not be available until drilling operations have been completed and logging data collected. A further announcement on the results of the well will now be likely in early June.

12 May 2015

'Eirik Raude' restarts Isobel Deep drilling

Rockhopper Exploration plc (“Rockhopper”), the oil and gas exploration and production company with interests in the North Falkland Basin and the Greater Mediterranean region, has announced the following operations update. The Erik Raude semisub rig has now completed repairs to its BOP control system and has undergone the subsequent re-testing of the BOP stack following its return to the Isobel Deep well location where drilling re-commenced on 11th May 2015. Since suspending operations on the Isobel Deep (14/20-1) well on 24th April 2015, the rig has spudded and suspended the Jayne East (14/15c-6) well at 541m mdrkb on 29th April 2015 and spudded and suspended the Chatham (14/10-10) well at 1388m mdrkb on 4th May 2015.

24 Apr 2015

Premier runs into trouble whilst drilling Isobel Deep

Rockhopper Exploration plc (“Rockhopper”), the oil and gas exploration and production company with interests in the North Falkland Basin and the Greater Mediterranean region, is providing an update on the operations on the 14/20-1 Isobel Deep well ("Well") that was spudded, by Premier Oil as operator, on 8th April 2015. Following successful setting of the 13 3/8" casing string at a depth of 1273.9m mdrkb, the Well has encountered problems with the BOP stack as a result of equipment malfunction which has required the Well to be suspended and BOP stack recovered for the necessary repairs. The Operator has decided to move the rig and set conductors at the Chatham and Jayne East locations. The rig will return to the Isobel Deep location to continue drilling on completion of BOP repairs and a further operational update will be issued at that time. No spud announcements will be made for the Chatham or Jayne East wells but information on the setting of conductors will be made in the next operational update.

13 Apr 2015

Falkland Oil and Gas Limited announces change to drilling programme

Falkland Oil and Gas Limited ("FOGL"), the exploration company focused on its extensive licence areas to the North, South and East of the Falkland Islands, has announced that Noble Energy ("Noble") and its joint venture partners FOGL and Edison International ("Edison") have elected to defer a potential second well in the South and East Falkland basin. The joint venture partners have concluded; having taken into account a number of factors, that the optimum course of action is to defer the drilling of a second well in the southern basin. In these circumstances FOGL was amenable to a proposal from Noble, that in order to fulfil the drilling commitment, they should utilise the contracted drilling slot to drill a well in the North Falklands Basin. Noble, Edison and FOGL remain fully committed to exploration in the South and East basin and still firmly believe in its prospectivity. The well on the Humpback prospect is considered by the joint venture partners to be the prime 'play opening' well. It is an important test of concept, in terms of evaluating the Cretaceous deepwater fan play and the presence of oil within the Fitzroy sub-basin. Humpback is located near a cluster of similar prospects totalling over one billion barrels of oil. The operator estimates that the Humpback prospect contains between 250 and 650 mmbbls of gross prospective resources (un-risked). If the initial drilling results are encouraging, the joint venture partners will look to fully appraise Humpback and drill other similar prospects within the play area. Such further exploration and appraisal drilling would be part of a future campaign, with wells on either Scharnhorst and/or Starfish also possibly forming part of such a programme. This decision does not impact any existing agreements between FOGL and Noble. In the event that another exploration well is drilled after Humpback, within the joint venture's licence area, FOGL would still retain a partial carry of the drilling costs under the terms of the Noble farm out agreement. FOGL is fully funded for the firm four wells and will be left in a stronger and more sustainable financial position as a result of this decision. Following this agreement, the revised drilling schedule is 1. Zebedee, 2. Isobel Deep, 3. Humpback, 4. Jayne East, 5. Chatham, 6. Rhea. The drilling program is currently being carried out by the Eirik Raude semisub which recently spudded the Isobel Deep well.

9 Apr 2015

Isobel Deep well spud in Falkland Islands

Rockhopper Exploration plc (“Rockhopper”), the oil and gas exploration and production company with interests in the North Falkland Basin and the Greater Mediterranean region, has announced that the 14/20-1 'Isobel Deep' well (the "Well") was spudded, by Premier Oil as operator, at 22:20 local time on the 8th April 2015. The Well is located on licence PL004a in which Rockhopper has a 24% working interest and is an exploration well on the Isobel deep prospect. The Isobel Deep Well will be the first test of the F3 fan system entering the basin from the South East margin as a sequence of stacked reservoirs. This well will be targeting the Isobel deep fan in the area of maximum mapped reservoir thickness and has a GCoS of 20%. The well is targeting Gross Pmean resources of 72mmbbls (range 9-207mmbbls) although the complex as a whole in this area has gross Pmean prospective resources of just over 500mmbbls. Drilling operations are expected to take approximately 30 days and no coring or testing is planned for this well. A further release will be made when drilling is completed. The North Falkland Basin wells are anticipated to cost approximately USD50 million each. As a result of the various carry arrangements, the total net cash exposure to Rockhopper of the four wells is estimated at approximately USD25 million.

2 Apr 2015

Premier strikes oil and gas with Zebedee-1

Premier Oil Plc (“Premier”) has announced that the Zebedee well (14/15b-5) in PL004b (Premier 36 per cent equity) discovered 81 feet of net oil-bearing reservoir and 55 feet of net gas-bearing reservoir. The well penetrated multiple targets in the Cretaceous F2 and F3 formations with a total hydrocarbon net pay of 136 feet. The reservoir at both the Hector and Zebedee intervals is of good quality and the above results are in line with prognosis. Good oil shows were recorded at the deeper F3 targets but at this location the sands are not well developed. The well will now be plugged and abandoned as a successful exploration well. The Eirik Raude rig will then drill the first exploration test of the Elaine/Isobel fan complex in the southern part of the North Falkland Basin with the Isobel Deep well. The results of this well are expected in late April.

6 Mar 2015

Premier spuds Zebedee prospect

Rockhopper Exploration plc (“Rockhopper”), has announced that the 14/15-5 well (“Zebedee”) was spudded by Premier Oil on 6th March 2015. The well is located on licence PL004b in which Rockhopper has a 24% working interest and is an exploration well. The Zebedee well will test a total of seven stacked fan bodies with varying geological chances of success (GCoS) of 9 - 52%. Net prospective Pmean resources are estimated at 68 million barrels (mmbbls) in a range of 13 - 178 mmbbls. Drilling, coring and logging operations are expected to take approximately 30 days. A further release will be made when those operations are completed. The well was spudded by the Eirik Raude semisub rig which will drill a further five wells in the Falkland Islands. The current drilling order is, Zebedee in licence PL004b, Isobel Deep in licence PL004a, Humpback in southern licence area, Jayne East in licence PL004c, Chatham in licence PL032 and a sixth well yet to be decided. The North Falkland Basin wells are anticipated to cost approximately USD50 million each.

3 Mar 2015

'Eirik Raude' arrives in Falkland Islands

Falkland Oil and Gas Limited (“FOGL”), the oil and gas exploration company focused on its extensive license areas to the North, South and East of the Falklands islands, and Rockhopper Exploration plc (“RKH”), the oil and gas exploration and production company with interests in the North Falkland Basin and the Greater Mediterranean region, are pleased to announce that the drilling unit Eirik Raude has arrived in the North Falkland Basin (“NFB”) and will shortly be moving to location to commence the first well, on the Zebedee prospect, of the six well drilling campaign that will see two wells drilled in the NFB then one to the south of the islands, followed by two more in the north and a final slot in the south.

2 Feb 2015

'Eirik Raude' semisub begins mobilisation to Falkland Islands

Rockhopper Exploration plc (“Rockhopper”), the oil and gas exploration and production company with interests in the North Falkland Basin and the Greater Mediterranean region, is pleased to announce that the drilling unit Eirik Raude has begun its mobilisation to the North Falkland Basin ("NFB") from West Africa.

17 Apr 2014

Total makes discovery at Saphir-1XB well

The Total-operated Saphir-1XB exploration well on Block CI-514 proved the presence of liquid hydrocarbons in the deep offshore west of Ivory Coast. “Drilled in an abrupt margin play, this first well is the first discovery in the San Pedro Basin, a frontier exploration area in Ivory Coast,” commented Marc Blaizot, Senior Vice President, Exploration at Total. "Having confirmed the presence of a petroleum system containing light oil, we will next evaluate this very promising find and focus on its extension to the north and east." Lying in 2,300 meters of water, Saphir-1XB is the first well in Block CI-514. It was drilled to a total depth of 4,655 meters, encountering around 40 meters of net pay containing light 34° API oil, in a series of 350 meters of reservoirs. The data acquired during drilling are being analyzed and will be used to determine the area’s potential and design the delineation program. Total is pursuing its intensive exploration program in the area, with plans to drill two wells in Blocks CI-515 and CI-516 by year-end. Total E&P Côte d’Ivoire operates Block CI-514 with a 54% interest, alongside CNR International (36%) and PETROCI Holding (10%).

2 Apr 2014

Lukoil completes first exploration well in Ivory Coast

LUKOIL Overseas (operator of LUKOIL Group's overseas upstream projects) has completed drilling its first offshore exploration well, Capitaine East-1x, at block CI-101 in the Republic of Côte d'Ivoire. The well penetrated through 140 meters of sandstone from a Turonian formation. The survey confirmed the presence of hydrocarbons, indicating the oil potential of the area. The Capitaine East-1X well target depth exceeds 5,200 m; the water depth at the well location exceeds 2,000 m. Drilling was conducted using the Eirik Raude, a 5th generation self-propelled semi-submersible drilling rig. At the end of 2013 LUKOIL completed drilling an appraisal well at the Independance field, located north-east of block CI-101 (at the adjacent CI-401 block). Currently, a survey is in progress to determine the block's resource potential. A proposal to drill another appraisal well at the Independance field will be considered soon. LUKOIL entered a Production Sharing Agreement (PSA) for the exploration, appraisal, development and production of hydrocarbons in blocks CI-101 and CI-401 in 2006. Shares in the project are distributed as follows: LUKOIL: – 56.66% (operator since 2012), PanAtlantic (formerly Vanco) – 28.34%, state-owned PETROCI Holding – 15%.

31 Dec 2013

Lukoil completes first exploration well in Sierra Leone

LUKOIL Overseas, operator of international upstream projects and a 100% subsidiary of LUKOIL, completed drilling of the first exploration well on Savannah structure (SL-5-11 deepwater block) offshore Sierra Leone. The well depth is more than 4,700 m, water depth at the drilling site exceeds 2,000 m. Drilling was accomplished using Ocean Rig Eirik Raude, world's largest self-propelled offshore platform of the 5th generation. Platform's height is 122 m, length is 119 m, width is 85 m, and displacement is 53 thousand tons, velocity is 7 knots, crew is 120 persons. Drilling was completed according to the schedule, with no violations of safety or environmental requirements, in strict adherence to the contractual obligations. The set objectives were achieved: targeted prospects were penetrated, oil saturated reservoirs were identified; oil samples were taken from the Turonian sands. Currently, the appraisal of potential hydrocarbon deposits is being performed. The results of this appraisal, as well as other data obtained while drilling, will undergo comprehensive analysis and classification. This work scheduled to be completed by the end of this year is aimed to expand the information available on the geological structure and petroleum potential of Sierra-Leonian - Liberian basin. In 2011, LUKOIL Overseas as the Operator with a 49% share entered the PSA for exploration and development of SL-5-11 block. This block, covering an area of 4,022 square kilometers, is located on the shelf and continental slope of the Atlantic Ocean at a water depth ranging from 100 to 3,300 meters. A standard contract for exploration and development of the block was concluded for the term of 30 years by project participants, including Oranto (30%) and PanAtlantic (21%). The minimum exploration program includes re-interpretation of historical seismic data, an electric exploration survey and drilling of one exploration well. Due to the importance of this program as an organic part of LUKOIL broad-scale drilling campaign in West Africa, the ceremonial launch of drilling in SL-5-11 block in September 2013 was attended by Ernest Bai Koroma, President of Sierra Leone, Guennady Gatilov, Deputy Minister of Foreign Affairs of Russia, and Andrey Kuzyaev, President of LUKOIL Overseas.

12 Sep 2013

Lukoil begins exploration drilling in Sierra Leone

Official events attended by Ernest Bai Koroma, President of the Republic of Sierra Leone, Gennady Gatilov, Deputy Minister of Foreign Affairs of Russia, and Andrey Kuzyaev, President of LUKOIL Overseas, have been held today in Sierra Leone on the occasion of the launch of drilling on the SL-5-11 block in the deepwater shelf of the West Africa. The official launch took place at the Eirik Raude drilling rig which started with spudding a deepwater well in the Savannah prospect. The target depth of the wildcat to be drilled within, will exceed 4,700 meters, the water depth at the drilling location is more than 2,000 meters. Eirik Raude is the largest 5th generation self-propelled offshore drilling rig in the world. The rig has a height of 122 m, width of 85 m, deadweight of 52,500 tons and transit speed of 7 knots, crew - 120 people. LUKOIL Overseas, operator of LUKOIL's international upstream projects, has entered into the PSA for exploration and development of block SL-5-11 in June 2011 as an operator with a 49% share. The other project partners are Oranto (30%) and PanAtlantic (21%). Block SL-5-11 covers an area of 4,022 square kilometers on the shelf and continental slope of the Atlantic Ocean with water depth ranging from 100 to 3,300 meters. 2D and 3D seismic data was acquired on 1,500 square kilometers leading to the identification of several prospects. From the geological point of view, the block belongs to the Sierra Leone-Liberia basin where a number of sizable oil discoveries have recently been made. A standard contract for exploration and development of the block was concluded for the term of 30 years. The exploration program for the block includes re-interpretation of historical seismic data, an electric exploration survey and drilling of one exploration well. The current exploration period will expire on December 31, 2013. Obligations of the next exploration period will depend on the drilling results.

20 Feb 2013

African Petroleum announces discovery at Bee Eater-1

African Petroleum Corporation Limited (African Petroleum) announces a discovery at the Bee Eater-1 well. The well was designed to test the Turonian fan by way of a large step out of 9.5km, west of the original Narina-1 oil discovery and has encountered 48 metres of Narina equivalent oil bearing Turonian sandstone out of a 135 metre oil interval, in line with the Company’s pre-drill expectations. Bee Eater-1 spudded on the 4th January 2013 using the ‘Eirik Raude’ drilling rig which has taken 48 days to drill the well, of which 21 days was downtime due to a malfunctioning Blow-out Preventer (BOP). The well was drilled to a total depth of 4,100 metres in a water depth of 1,067 metres.

8 Jan 2013

African Petroleum spuds Bee Eater-1 well

African Petroleum Corporation Limited (African Petroleum) started drilling the Bee Eater-1 well in Block LB-09 offshore Liberia on the 4th January 2013 with Ocean Rig’s semi-submersible rig, the ‘Eirik Raude’. The Bee Eater-1 well is located 9.5 km north west of the 2012 Narina discovery which discovered high quality oil in Turonian reservoirs. The Bee Eater - 1 well will test a potentially westerly extension of the Narina-1 Turonian oil discovery in an axial position of the fan for improved reservoir quality and is located up dip of the postulated Narina -1 OWC. Mean recoverable un-risked prospective resources for the Bee Eater/Narina fan system, which extends over an area of 300 sq km, are estimated as 840 MMstb and 2396 MMstb for the additional prospects identified on Blocks LB-08 & LB-09 (3236 MMstb in total). ERC Equipoise have provided a recent update on the prospective resources for Liberia Blocks LB-08 & LB-09 which is available on the company website www.africanpetroleum.com.au.The second well in this drilling program will be drilled with the ‘Eirik Raude’ in Liberia following on immediately after completion of the Bee Eater-1 well. A number of potential well locations in Blocks LB-08 & LB-09 are under consideration dependent on the outcome of the Bee Eater-1 well. Karl Thompson CEO comments "2012 has been a very successful year for the company with the Narina-1 discovery in Liberia and the expansion of the exploration portfolio with the addition of 5 more exploration blocks in Senegal, Sierra Leone and Cote d’Ivoire. Extensive 3D seismic surveys have been acquired on the blocks in Senegal and Cote d’Ivoire with very encouraging results and are being evaluated to include in our forward drilling program. We are looking forward to a very active exploration program in 2013 starting with the drilling of the high potential Bee Eater prospect in Liberia LB-09 and follow on drilling in Liberia plus Cote d’Ivoire and The Gambia/Senegal coast.”

7 Jun 2012

Paon-1X exploration well discovers oil in Côte d'Ivoire

Tullow Oil plc (Tullow) announces that the Paon-1X exploration well in the CI-103 licence offshore Côte d'Ivoire has intersected good quality light oil in a Turonian fan system. Paon-1X is the first deepwater exploration well drilled in the CI-103 licence and has encountered 31 metres of net oil pay in a gross interval of 74 metres of turbidite sands. Pressure data indicates that this interval contains a continuous hydrocarbon column and samples show that it is a light oil of 41 degrees API. Further analysis is required to determine reservoir quality and the extent of the fan system. Following completion of logging operations, the well will be suspended for possible future use in appraisal and development operations. The Eirik Raude dynamically positioned semi-submersible rig drilled the Paon-1X well to a final depth of 5,090 metres in water depths of 2,193 metres. Tullow (45%) operates the CI-103 licence and is partnered by Anadarko Petroleum (40%) and the Societé Nationale d'Opérations Pétrolières de Côte D'Ivoire (Petroci) (15%).

22 Mar 2012

African Petroleum contracts 'Eirik Raude' for two wells in Liberia

Following its Narina -1 discovery in Liberia, West African focused oil and gas exploration company, African Petroleum Corporation Limited (African Petroleum), is pleased to announce that it has signed a contract with Ocean Rig UDW, for a two well programme with the option for a third well, to continue its drilling program in Blocks 8 & 9, Liberia West Africa, and within the Company’s other West Africa Blocks. The programme will be completed using the ‘Eirik Raude’, a deepwater 5th generation semi-submersible, drilling rig and it is expected to commence operations in Q3 or Q4 2012.African Petroleum’s contracting of the ‘Eirik Raude’ demonstrates the Company’s ability to secure deep water drilling rigs in a very tight rig market and ensures that it can deliver its extensive exploration programme.

9 Mar 2009

Significant discovery at Tweneboa-1 exploration well offshore Ghana

Tullow Oil plc (Tullow) announces that the Tweneboa-1 exploration well, drilled in the Deepwater Tano licence offshore Ghana, has discovered a significant highly-pressured light hydrocarbon accumulation. The well encountered 21 metres of net pay and was drilled to a depth of 3,593 metres and is currently being deepened to further assess the discovery and the up-dip limit of a potential deeper fan system. The well was optimally located to penetrate multiple targets, including the edge of an undrilled major Turonian fan system. Further drilling will now be required to test core areas within this potentially giant stratigraphic trap where thicker Turonian reservoir sections are mapped. The upside area of approximately 200 square kilometres includes two de-risked prospective parts, Owo and Ntomme. The Tweneboa-1 well was drilled by the Eirik Raude deepwater rig in a water depth of 1,148 metres some 25 kilometres west of the Jubilee Field. Tullow (49.95%) operates the Deepwater Tano licence and is partnered by Kosmos Energy (18%), Anadarko Petroleum (18%), Sabre Oil & Gas (4.05%) and the Ghana National Petroleum Corporation (GNPC) (10% carried interest).

8 Jan 2009

Successful Mahogany-3 appraisal and exploration well

Tullow Oil plc (Tullow) announces that the Mahogany-3 well located in the West Cape Three Points licence offshore Ghana has intersected significant light oil columns in both the Jubilee field appraisal objective and also a deeper exploration target. In total, 33 metres of net pay have been penetrated. The primary objective of Mahogany-3 was to appraise the Jubilee field reservoir section away from the strong seismic amplitudes which have been the main targets to date. Results of drilling, wireline logs and samples of reservoir fluid indicate that 16 metres of high quality stacked oil bearing sandstones have been encountered. This confirms a significant extension of the Jubilee field to the southeast. The secondary objective of the well was to drill Mahogany Deep, an exploration target which has been identified on 3D seismic but lies at a previously untested stratigraphic level. In this section, the well encountered 17 metres of good quality oil bearing reservoir sandstones at levels significantly deeper than the oil water contacts previously intersected on the Jubilee field. This success opens up further potential in the region and is the subject of ongoing evaluation. The well has been drilled by the Eirik Raude semi-submersible rig to a depth of 4,028 metres in a water depth of 1,236 metres. Once wireline logging operations have been completed, casing will be set in advance of further drilling which is being carried out to gain further information on the regional geology. Following the conclusion of activities on Mahogany-3, the rig will move to the Tweneboa-1 exploration well location in the Deepwater Tano block. Drilling activities are expected to commence before the end of January. Tullow has a 22.9% interest in the West Cape Three Points licence. Other partners include Kosmos Energy (Operator 30.875%), Anadarko Petroleum (30.875%), the E.O. Group (3.5%), Sabre Oil & Gas (1.854%) and the Ghana National Petroleum Corporation (GNPC) (10% carried interest). Tullow is the Unit Operator of the Jubilee Field and the Technical Operator for this well.

25 Jul 2006

Dry Edvarda well

The drilling of exploration well 6403/6-1 in the Edvarda structure in the Norwegian Sea is completed. No gas or oil was found. ”It is of course disappointing that we did not strike hydrocarbons, but the deep-sea areas in the Norwegian Sea are rather unexplored. This new data point will be an important contribution in the efforts to find more oil and gas in the region,” say Kjersti Seim, exploration manager for the Norwegian Sea deep-sea area. The well was drilled to a total depth of 4095 metres below sea level. The drilling rig Eirik Raude performed the drilling in 1720 metres of water. The purpose was to examine the potential for oil and gas in possible sandstones from the Cretaceous period in the Edvarda prospect. Edvarda is located some 100 kilometres north-west of the gas field Ormen Lange in the southern part of the Norwegian Sea, some 230 kilometres northwest of Kristiansund. Statoil is operator for production licence 322, with an interest of 90%., whereas 10% is owned by Shell.

13 Jan 2006

Exploration well in Barents Sea

Drilling began on an exploration well on Statoil's Uranus prospect in the Barents Sea from the Eirik Raude rig on 13 January. Expected to take about 70 days, the well is to be drilled to a total depth of about 4,000 metres. Statoil has previously made a small discovery in the same area. "This well is part of our work to investigate the further potential in this area," says Ørjan Birkeland, Statoil's Barents Sea exploration manager. The Uranus prospect is located 120 kilometres from land in block 7227/11 in production licence 202. Once Uranus is completed, Eirik Raude will move to the Norwegian Sea where it will drill an exploration well on the Statoil-operated Edvarda prospect.

10 Oct 2005

Rig leak posed no threat

A discharge of hydraulic oil from the Eirik Raude drilling rig in the Barents Sea on 12 April posed no environmental threat, according to an official inquiry report. This document has been drawn up by the Petroleum Safety Authority Norway (PSA) and the Norwegian Pollution Control Authority (SFT). Eirik Raude was drilling the Guovca wildcat for Statoil when the accident happened. Work stopped at once, and contractor Ocean Rig and Statoil sought to clarify the background for the leak. This internal investigation also concluded that the discharge of about one cubic metre of hydraulic oil had no impact on the marine environment. “The official report is in line with our own assessment of the causes of the accident,” says Ørjan Birkeland, Statoil’s exploration manager for the Barents Sea. “We’re glad it confirms that no environmental damage was done. It also supports the view that, despite the leak, this was one of Norway’s most environment-friendly drilling operations.” The internal inquiry found that the direct cause of the leak was a split hose. After the hose had been replaced, drilling resumed following a three-week shutdown.

23 Sep 2005

Completing Tulipan wildcat

A small gas find has been made by Statoil on its Tulipan prospect in the Norwegian Sea. As operator for production licence 251, which covers this structure, the group is currently completing the 6302/6-1 wildcat there. Small quantities of gas were encountered in early Tertiary sandstones at a depth of just over 2,600 metres beneath the seabed. Statoil is currently completing a very extensive logging programme in the well, which will form the basis for further analyses. The wildcat terminated in late Cretaceous rocks about 2,950 metres beneath the seabed. “This represents a new play model on the Norwegian continental shelf,” reports Knut Chr Grindstad, exploration manager for the deepwater part of the Norwegian Sea. “The well accordingly opens exciting perspectives in a completely new area. Unfortunately, however, it yielded only a small discovery.” Drilled by Eirik Raude, the well is located in 1,260 metres of water roughly 130 kilometres west of Hydro’s Ormen Lange gas development. Statoil has a 90 per cent interest in Tulipan, with Norske Shell holding the remaining 10 per cent. BG Norge is acquiring 20 per cent of Statoil’s share, subject to government approval. Eirik Raude will now move to the Barents Sea to drill on Eni’s Goliat discovery before spudding an exploration well on Statoil’s Uranus prospect.

12 Sep 2005

Eirik Raude resumes exploration drilling

The drilling rig, "Eirik Raude," was able to resume exploration drilling in the Barents Sea on Monday afternoon after getting the green light from the Norwegian Petroleum Directorate. Ocean Rig, the company that owns "Eirik Raude," was ordered on 17 February to evaluate the quality of all the rig's emergency barriers against accidental spills into the sea. As operator of the exploration drilling operation, Hydro was ordered to ensure that the evaluation was adequately conducted. The Norwegian Petroleum Directorate concluded on Monday that the order had been fulfilled and that exploration drilling could resume. The order to halt drilling was issued on Thursday, in the wake of two accidental spills into the sea, respectively, on 8 and 16 February.

30 May 2005

Tulipan wildcat spudded

The first exploration well on Statoil’s Tulipan prospect in the Norwegian Sea has been spudded by the Eirik Raude drilling rig. Located in block 6302/6 west of Hydro’s Ormen Lange gas field, this operation is being conducted in 1,250 metres of water and should last for two-three months. Plans call for the wildcat to be drilled to a total measured depth of just over 3,000 metres beneath the seabed. “Only 10 deepwater wells have been drilled off Norway until now, so the area is little explored,” says Knut Chr Grindstad, exploration manager for the Norwegian Sea. Statoil intends to drill two more exploration wells in this part of the Norwegian continental shelf during 2005.

3 May 2005

Drilling resumes on Guovca

Eirik Raude has today, 3 May, resumed drilling a wildcat on Statoil’s Guovca prospect in the Barents Sea after a three-week halt, in agreement with the Petroleum Safety Authority Norway. Together with contactor Ocean Rig, Statoil has completed a detailed investigation relating to the accidental discharge of hydraulic oil on 12 April. This incident prompted the group to halt drilling by Eirik Raude on its own initiative. The authorities also initiated an inquiry and refused to allow new operations before the discharge and compensatory measures had been reviewed in detail. According to the official investigation, the direct reason why about one cubic metre of hydraulic oil leaked out was the rupture of a hose. The latter should have been replaced, and the inquiry revealed failures in the monitoring system on the rig. Statoil takes a serious view of this incident, which exposed weaknesses in routines and systems, and has initiated a series of measures with Ocean Rig to prevent such incidents in the future. In the review after 12 April, all hoses and systems have been thoroughly checked and the damaged hydraulic hose replaced. Although Statoil believes that the requirement for two barriers was met when the discharge occurred, supply hoses beneath the rig’s cellar deck have been moved up to the deck. To ensure closer monitoring of operations on board, Statoil has reinforced the crew with an additional drilling engineer. The group has also carried out an impact assessment of the discharge, which shows that this limited leak of hydraulic oil has had no effect on the marine environment. “Everyone working for us has an obligation in relation to health, safety and the environment,” says Tim Dodson, senior vice president for exploration on the Norwegian continental shelf. “We set very high environmental and safety standards, and it’s up to us to demonstrate that we comply with these.” Statoil has been in close touch with the Norwegian Petroleum Directorate, the Petroleum Safety Authority Norway and the Norwegian Pollution Control Authority over the discharge and its investigation. “The measures implemented before drilling resumed have been adopted in close consultation with the authorities,” says Mr Dodson. “By taking these steps, we’re minimising the possibility of future undesirable incidents.”

13 Apr 2005

Drilling on Eirik Raude halted

Statoil has decided to stop all drilling from the Eirik Raude rig, which is drilling the Guovca exploration well in the Norwegian sector of the Barents Sea. Hydraulic oil was accidentally spilled from the rig yesterday, 12 April, probably caused by a leak from a hydraulic hose. “We take a very serious view of the incident and are now setting up a working group with participants from the rig operator Ocean Rig,” says Tim Dodson, Statoil’s senior vice president for exploration on the Norwegian continental shelf. "This group will identify short and long-term measures to avoid similar leaks in the future." "The progress of the drilling activity is of secondary importance, and we will take the time we need before we start up again." The Guovca well was spudded on 2 April.

4 Apr 2005

Barents Sea wildcat spudded

A wildcat in the Guovca prospect operated by Statoil in the Barents Sea was spudded on 2 April from the Eirik Raude rig. Statoil had planned to drill the Uranus exploration well in the Barents Sea before Guovca, but had to reprioritise the drilling programme as handover of the rig from Hydro was delayed. Work on drilling and completing the well is expected to take 20-30 days. Once Guovca is completed, Eirik Raude will move to the Norwegian Sea for a well on Statoil’s Tulipan prospect in block 6302/6. The rig is then due to return to the Barents Sea during the autumn to drill the Uranus wildcat. “We’ve adopted a number of measures to ensure safety and protect the environment while drilling this well,” explains Ørjan Birkeland, Statoil’s Barents Sea exploration manager. “These include detailed planning and training of personnel in cooperation with the rig contractor and other suppliers.”

23 Mar 2005

Barents Sea drilling concluded

Hydro has concluded its drilling operation of exploration well 7220/6-1 at the Obelix prospect in the Barents Sea. The well was drilled with the exploration rig 'Eirik Raude' to evaluate a limestone prospect of Carbon and Permian age. Drilling was concluded 1,515 metres below the sea bed. Traces of hydrocarbons were found at the expected reservoir level. Attempts to test the samples showed that the hydrocarbons were not producible, and the well will not be tested. 'Eirik Raude' will now move on to drill a further two exploration wells further east in the Barents Sea. The drilling operations in the Barents Sea are being carried out in accordance with stringent environmental requirements imposed by the authorities for oil activities in the area. In spite of two accidental emissions during drilling, the operations at Obelix have not had any damaging effect on the environment.

18 Feb 2005

Will ensure "Eirik Raude" meets demands

Hydro supports and will follow up the Norwegian Petroleum Directorates order and ensure that rig company Ocean Rig conduct a thorough evaluation of spill barriers on the rig "Eirik Raude" before drilling resumes in the Barents Sea. Exploration drilling on the "Eirik Raude" rig was stopped on Wednesday, February 16, after an accidental spill of drilling fluids into the sea. ”Hydro will ensure that the drilling rig, "Eirik Raude", meets the authorities and the company’s technical and environmental demands concerning the present drilling operation in the Barents Sea. The company supports the Norwegian Petroleum Directorate’s wish for an additional inspection of the rig’s spill barriers and will ensure that a thorough evaluation will be carried out before drilling resumes,” says Hydro Oil & Energy, Operations head, Øystein Michelsen. There have been two minor spills from "Eirik Raude" during the present drilling operation in the Barents Sea during the past two weeks. Both discharges consisted mainly of organic, biodegradable matter, and were reported to the Norwegian Pollution Control Authority and the Norwegian Petroleum Directorate. The spills did not result in any environmental consequences.

17 Feb 2005

Accidental spill from Eirik Raude

An accidental emission from the drilling rig "Eirik Raude" on Wednesday, 16 February, has resulted in four cubic meters of drilling fluid being spilled into the sea. The drilling fluid contains mostly clay and brine. Hydro has informed the Norwegian Pollution Control Authority about the incident, despite the fact the emission is not harmful to the environment. Hydro and the company Ocean Rig, Eirik Raude's owner, have done substantial work to avoid spills that can be harmful to the natural environment during current exploration drilling in the Barents Sea. During exploration drilling, a drilling fluid is used consisting mainly of water, clay, salt and other biodegradable components. This emission of four cubic meters of drilling fluid also included approximately 160 kilos of glycol, which is classified as a "yellow" chemical. The company regrets the incident and will work to avoid new episodes. The incident occurred when a large wave disconnected a rubber hose from a riser under the rig. Hydro is now investigating the accident and, together with Ocean Rig, will implement necessary measures to avoid any new spills into the sea.

12 Aug 2004

Barents Sea permit sought

An application for an emission permit to drill on the Uranus prospect in the Barents Sea has been submitted by Statoil to the Norwegian Pollution Control Authority (SFT). This exploration well will be second in the most environment-friendly drilling campaign ever conducted on the Norwegian continental shelf. Statoil’s request for a permit is accompanied by an environmental risk analysis and emergency response plan for the operation. The application is based on the principles enshrined in the recent impact assessment for offshore operations in the northern Norwegian Sea and the Barents Sea. These require the well to be planned with no discharges to the sea except with the hole section for surface casing – in other words, the topmost 400 metres. Discharges in the latter case will consist largely of natural substances such as salt and clay. But it will be necessary to emit about two kilograms of pipe dope, a small portion of which is characterised as environmentally harmful. Since the amount is so small, this is considered acceptable. The well will utilise water-based mud, and drill cuttings are to be shipped to land. Statoil’s application relates to the 7227/11-1S wildcat in production licence 202, which is due to be spudded in early 2005 after Norsk Hydro has finished a wildcat on the Obelix prospect. Both operators will use Eirik Raude in the Barents Sea. One of the world’s most modern and advanced drilling rigs, it is designed for safe operation in harsh-weather areas. Statoil has devoted considerable efforts, in cooperation with other players in the region, to reaching the goal of zero discharges.

12 May 2004

Eirik Raude for the Barents Sea

A charter worth around NOK 340 million covering use of the Eirik Raude drilling rig in the Barents Sea has been awarded by Statoil to owner Ocean Rig. Due to run for an estimated 155 days, this contract has been placed on behalf of the licensees in three exploration areas. Statoil plans to operate one well each in areas G and F, while Hydro intends to drill one in area C. ”We’ve opted for Eirik Raude because it’s among the most suitable vessels for the job,” explains Tor Gunnar Gloppen in the rig management unit of Exploration & Production Norway. ”It’s big, new and built to work in environmentally-sensitive arctic waters. Over the past couple of years, it’s operated off Canada in areas with weather just as tough as in the Barents Sea.” Statoil and Hydro signed a letter of intent with Ocean Rig in April on drilling the three wells, but the rig to be used has only now been clarified. Plans call for the first well to be spudded in late autumn. Eirik Raude will also do a minor job for Hydro on the Troll field in the North Sea before moving to the Barents Sea. The Troll work is included in the charter’s overall value.

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