Rig: Valaris DS-12

Name Valaris DS-12
Owner Valaris PLC
Manager Valaris PLC
Rig Type Drillship
Sub Type Ultradeep Water
Jackup Type --
Max Water Depth (ft) 10000
Max Drill Depth (ft) 40000
Dimensions (ft) 780 x 137 x 62
Leg Length (ft) --
Competitive Yes

Current Location

Country Canary Islands (Spain)
Region North Africa

Drilling Equipment

Drawworks Type National Oilwell Varco AHD-1250
Drawworks HP 9000
Mud Pumps Type National Oilwell Varco 14-P-220 Triplex
Top Drive National Oilwell Varco TDX-1250
Hookload Capacity (lbs) 2500000

Rig Construction Details

Rig Design DSME
Rig Model 12000
Year Built 2014
Country of Build South Korea
Yard Name Okpo Shipyard
Group Yard Name Daewoo Shipbuilding & Marine Engineering (DSME)

Rig Contract Details

Operating Status Ready Stacked
Operator Chevron

News

9 May 2016

Kosmos Energy Announces Significant Gas Discovery Offshore Senegal

Kosmos Energy (NYSE: KOS) announced today that its Teranga-1 exploration well offshore Senegal has made a significant gas discovery. Located in the Cayar Offshore Profond block approximately 65 kilometers northwest of Dakar in nearly 1,800 meters of water, the Teranga-1 well was drilled to a total depth of 4,485 meters. The well encountered 31 meters (102 feet) of net gas pay in good quality reservoir in the Lower Cenomanian objective. Well results confirm that a prolific inboard gas fairway extends approximately 200 kilometers from the Marsouin-1 well in Mauritania through the Greater Tortue area on the maritime boundary to the Teranga-1 well in Senegal. Kosmos has now drilled five consecutive successful exploration and appraisal wells in this fairway with a 100 percent success rate. In the process, the company has discovered a gross Pmean resource of approximately 25 Tcf and estimates the fairway may hold more than 50 Tcf of resource potential. Andrew G. Inglis, chairman and chief executive officer, said: “Our continuing exploration success demonstrates we have opened a super-major scale basin offshore Mauritania and Senegal with world-class resource potential. Given the scale and quality of the gas resource discovered along the inboard trend, our focus is to move this resource through to development. Our forward exploration plan is to mature the two independent tests with oil potential in northern Mauritania and in the outboard of Mauritania and Senegal for drilling in 2017.”

16 Mar 2016

Kosmos Energy Announces Successful Appraisal of Gas Discovery Offshore Mauritania and Senegal

Kosmos Energy (NYSE: KOS) announced today that its Ahmeyim-2 appraisal well has successfully delineated the Ahmeyim and Guembeul gas discoveries offshore Mauritania and Senegal. Located in Mauritanian waters, approximately 5 kilometers northwest, and 200 meters downdip of the basin-opening Tortue-1 discovery well in approximately 2,800 meters of water, Ahmeyim-2 was drilled to a total depth of 5,200 meters. As anticipated, in the Lower Cenomanian and Albian, Ahmeyim-2 penetrated the seismic-inferred gas-water contacts, defining the field limit and extending the productive field area from approximately 50 square kilometers to 90 square kilometers. Furthermore, the well confirmed significant thickening of the gross reservoir sequences down-structure and importantly, within the Lower Cenomanian, static fluid pressure communication between the Tortue-1, Guembeul-1 and Ahmeyim-2 wells. The well encountered 78 meters (256 feet) of net gas pay in two excellent quality reservoirs, including 46 meters (151 feet) in the Lower Cenomanian and 32 meters (105 feet) in the underlying Albian. These results demonstrate field-wide reservoir continuity and indicate Tortue West is a large, simple gas field. With the integration of the Ahmeyim-2 well results, our Pmean gross resource estimate for the Tortue West structure has increased to 15 Tcf from 11 Tcf as a result of extending the field area in the Cenomanian and the Albian. Accordingly, the Pmean gross resource estimate for the Greater Tortue Complex has increased to over 20 Tcf from 17 Tcf. “Ahmeyim-2 is our fourth successful exploration and appraisal well and continues our 100 percent success rate in the outboard Cretaceous petroleum system offshore Mauritania and Senegal, further demonstrating that Kosmos has opened a world-class hydrocarbon province. With this well, we believe we have proven sufficient gas resource to underpin a world-scale LNG project in the Tortue West structure alone. The combination of the resource size and quality continue to support our view that Tortue is a competitive source of LNG and we are working towards commercialization,” said Andrew G. Inglis, chairman and chief executive officer. “Our well-to-seismic calibration has again been proven, highlighting the reliability of this tool and increasing our confidence in its use for fully unlocking the basin, which we believe has significant potential for both oil and gas. We now plan to drill the first of three independent oil tests in our blocks offshore Mauritania and Senegal, starting with the Teranga-1 well, located in the Cayar Offshore Profond Block, offshore Senegal.” Since 2012, Kosmos has held rights to conduct exploration in the C-8, C-12, and C-13 contract areas under production sharing contracts with the Government of Mauritania’s Société Mauritanienne Des Hydrocarbures et de Patrimoine Minier (SMHPM). Kosmos operates the Ahmeyim-2 well with 90 percent equity and is joined by its partner SMHPM at 10 percent. The blocks are contiguous, range in water depth between 1,000 and 3,000 meters, and have combined acreage of approximately 27,000 square kilometers.

27 Jan 2016

Kosmos Energy Announces Significant Gas Discovery Offshore Senegal

Kosmos Energy (NYSE: KOS) announced today that its Guembeul-1 exploration well, located in the northern part of the St. Louis Offshore Profond license area in Senegal, has made a significant gas discovery. Located approximately five kilometers south of the basin-opening Tortue-1 gas discovery (renamed Ahmeyim) in approximately 2,700 meters of water, Guembeul-1 was drilled to a total depth of 5,245 meters. The well encountered 101 meters (331 feet) of net gas pay in two excellent quality reservoirs, including 56 meters (184 feet) in the Lower Cenomanian and 45 meters (148 feet) in the underlying Albian, with no water encountered. Importantly, Guembeul-1 has demonstrated reservoir continuity as well as static pressure communication with the Tortue-1 well in the Lower Cenomanian, suggesting a single, large gas accumulation. Moreover, the well has significantly de-risked adjacent prospectivity, including proving the existence of excellent quality reservoirs in the Albian. Furthermore, it has provided additional calibration of our seismic attribute exploration tool, confirming its reservoir and fluid predicative capability for these primary exploration targets. Based on the integration of the Guembeul-1 well results, our Pmean gross resource estimate for the Tortue West structure has increased to 11 Tcf from 8 Tcf as a result of greater reservoir (net to gross) confidence in the Cenomanian, as well as the inclusion of volumes in the Albian. Accordingly, the Pmean gross resource estimate for the Greater Tortue Complex has increased to 17 Tcf from 14 Tcf. Kosmos has also entered into a Memorandum of Understanding (MOU) signed by Pétroles du Sénégal (Petrosen) and Société Mauritanienne Des Hydrocarbures et de Patrimoine Minier (SMHPM), the national oil companies of Senegal and Mauritania, respectively, which sets out the principles for an intergovernmental cooperation agreement for the development of the cross-border Greater Tortue resource. The MOU enables Kosmos and the two governments to work together toward early development of the field, thereby maximizing value for all stakeholders. “We are pleased to have delivered another major discovery with our first exploration well offshore Senegal. Guembeul-1 confirms the presence of a world class gas resource that extends into both Senegal and Mauritania. With our successful appraisal program and support of both governments, the initial gas development is gaining momentum,” said Andrew G. Inglis, chairman and chief executive officer. “The Guembeul-1 well continues our 100% success rate in the outboard Cretaceous petroleum system offshore Senegal and Mauritania, which we believe is a strategically important new oil and gas province and we are focused on unlocking the basin’s full potential.” The Atwood Achiever drillship will now proceed to Mauritania to drill the Ahmeyim-2 delineation well in the southern part of Mauritania’s Block C-8. This will test the downdip limits of the field and is expected to complete appraisal of the Tortue West structure. Kosmos holds a 60 percent interest in the Guembeul-1 well, along with Timis Corporation Limited at 30 percent and Petrosen at 10 percent. Since 2014, Kosmos has held rights to conduct exploration in the St. Louis Offshore Profond and Cayar Offshore Profond license areas under production sharing contracts with the Government of Senegal.

12 Nov 2015

Kosmos Energy Makes Second Major Gas Discovery Offshore Mauritania

Kosmos Energy (NYSE: KOS) announced today that the Marsouin-1 exploration well, located in the northern part of Block C-8 offshore Mauritania, has made a significant, play-extending gas discovery. This is the company’s second major discovery of 2015. Based on preliminary analysis of drilling and wireline logging results, Marsouin-1 encountered at least 70 meters (230 feet) of net gas pay in Upper and Lower Cenomanian intervals comprised of excellent quality reservoir sands. Located approximately 60 kilometers north of the basin-opening Tortue-1 gas discovery (renamed Ahmeyim), Marsouin-1 was drilled in nearly 2,400 meters of water. “Marsouin-1 is our second major discovery of 2015, extending our 100 percent success rate in the outboard Cretaceous petroleum system offshore Mauritania and Senegal. Well-to-seismic calibration has significantly de-risked the discovered resource base, as well as future prospects in the basin. Importantly, the well results have validated our charge model and given us growing confidence in our ability to predict the oil and gas potential of this emerging, large-scale petroleum system. We have a disciplined exploration and appraisal program planned to further unlock the basin,” said Andrew G. Inglis, chairman and chief executive officer. The Atwood Achiever drillship will now proceed to the Ahmeyim-2 location in the southern part of Mauritania’s Block C-8 where it will drill the top-hole section of the well. The drillship is then expected to sail to Senegal where it will spud Guembeul-1, the first in a series of wells to delineate the Greater Tortue area, before year-end.

1 Oct 2015

Atwood Achiever given contract extension

Atwood Oceanics, Inc. (“Atwood”) has announced that, effective today, one of its subsidiaries agreed to a one-year extension and rate adjustment to its existing contract with Kosmos Energy Ventures (“Kosmos”) for the ultra-deepwater rig, the Atwood Achiever. The Atwood Achiever commenced its three-year drilling services contract with Kosmos in November, 2014, for operations offshore Northwest Africa. The agreement adjusts the operating day rate to approximately USD495,500, net of taxes, and extends the contract end date to November, 2018. As part of the agreement, Kosmos has an option, which may be exercised at any time through October 1st, 2016, to revert the contract to the original operating day rate and original end date. Exercising this option will result in a payment that includes the difference in day rates, taxes, and an administrative fee covering the time periods for which the reduced day rate was invoiced.

11 Aug 2015

No hydrocarbons likely at MZ-1

Pura Vida Energy NL (“Pura Vida”) advises that the MZ-1 exploration well offshore Morocco has drilled through the three prognosed Jurassic fans and the well has reached a final depth of 6,150 metres Sub Sea True Vertical Depth (SSTVD) within Triassic aged sediments and wireline logs are expected to be run shortly. Preliminary results from available drilling data (excluding wireline logs) indicate that no oil shows have been encountered. After completion of wireline logging, the well is expected to be plugged and abandoned as planned. Whilst final costs in relation to the well are not yet available, the Company anticipates costs to be in line with budget expectations. The decision was made by the joint venture to deepen the well to 6,150 metres to intersect the Lower Jurassic source rocks and test Jurassic Fan-3, which has provided valuable information and the ability to fully calibrate all data prior to selection of the location of the second well. Pura Vida’s Managing Director, Mr Damon Neaves commented: “MZ-1 is Pura Vida’s first exploration well and although this result is a set-back, we will now renew our efforts in pursuing the prospectivity in the Mazagan permit with the benefit of the information we have gained from this well. Mazagan represents a large acreage position containing multiple play types and prospects, what we’ve learned from MZ-1 will help us define the best prospect for our next well on the Mazagan permit. We congratulate the Operator for safely and efficiently completing the MZ-1 deep water well. Pura Vida has built a diversified portfolio that ensures a pipeline of future opportunities to create value for our shareholders.” With regards to a second well, PXP Morocco BV, a subsidiary of Freeport-McMoRan Oil & Gas as Operator of the Mazagan permit (Operator), entered into a rig share agreement with Kosmos Energy Ventures for two well slots with the Atwood Achiever deep water drillship to drill two wells in the Mazagan permit. Pura Vida has been advised by the Operator that it has agreed with Kosmos to cancel the second slot under those arrangements. Rates for deep water drillships have fallen sharply since the Atwood Achiever was contracted and the Operator has cancelled the second slot under the rig share agreement in order to contract another vessel to take advantage of the current weakness in market conditions for rigs with the aim to reduce the cost of the second well. 2 Under the farmin agreement between the Operator and Pura Vida entered into in January 2013, the drilling of the second well must be commenced by no later than September 2016. If the joint venture is successful in securing a drillship at a lower rate, the risk of the cost of the two wells exceeding the US$215 million limit on carry under the farmin agreement will be reduced. This will also have the benefit of reducing Pura Vida’s reliance (if any) on the option for an additional carry in excess of the US$215 million limit, thereby reducing the risk that Pura Vida’s equity in the permit will be diluted

29 Jul 2015

MZ-1 exploration well disappoints in Morocco

Pura Vida Energy NL (“Pura Vida”) advises that the MZ-1 exploration well has reached a depth of 4,653 metres within the Lower Cretaceous and that wireline logs have been run to evaluate the entire open hole section of the well. Preliminary results from all of the data gathered to date indicates that there is no effective reservoir in either of the secondary objectives in the Cenomanian and Aptian intervals and there were no oil shows encountered. Current operations include running casing, prior to drilling ahead to the firm Total Depth (TD) of 5,600 metres in the Jurassic, to test the primary objectives of the basin floor fans, Fan-1 and Fan-2. After drilling through these targets a decision will be made whether to deepen the well to 6,150 metres to test a third Jurassic fan, Fan-3. Managing Director, Mr Damon Neaves commented: “We are disappointed that the well failed to encounter reservoir in the secondary objectives in the Cretaceous, however we expect to intersect the primary targets in the Jurassic and look forward to reporting those results shortly.”

1 Jun 2015

'Atwood Achiever' spuds MZ-1 well in Morocco

Pura Vida Energy NL (“Pura Vida”) has announced that the Atwood Achiever drillship has successfully spudded the MZ-1 well within the Mazagan permit, offshore Morocco. Freeport-McMoran oil & gas is the operator of the permit. Drilling is expected to take around 2-3 months. The MZ-1 well is targeting the Ouanoukrim prospect which is a series of five stacked targets in both the cretaceous and Jurassic reservoirs. The unit recently completed the Tortue-1 well for Kosmos Energy in Mauritania.

18 May 2015

Kosmos announces larger discovery at Tortue-1

Kosmos Energy (“Kosmos”) has announced that the Tortue-1 exploration well in Block C8, offshore Mauritania has encountered additional hydrocarbons whilst drilling to its total depth. Based on the preliminary analysis of drilling results, Tortue-1 has intersected approximately 10 meters (32 feet) of net hydrocarbon pay in the lower Albian section, which is currently interpreted to be gas. This is in addition to the previously announced 107 meters (351 feet) of net pay encountered in the Cenomanian, which was the primary objective. The well was drilled beyond the primary objective to obtain deeper stratigraphic information and enable seismic calibration of the Albian, which will be tested in subsequent wells. Down to total depth drilled, no water was encountered in the well. Brian F. Maxted, chief exploration officer, said: “We are encouraged by the presence of additional hydrocarbons in the deeper portion of the well. This suggests we have a working hydrocarbon system in both the Albian and Cenomanian sequences. While the Albian was not the primary objective of the Tortue-1 well, the presence of additional hydrocarbons in the Albian further de-risks other prospects in the Greater Tortue Complex which include primary reservoir targets in both the Albian and underlying Aptian.” Located approximately 285 kilometers southwest of Nouakchott in 2,700 meters of water, and drilled with the Atwood Achiever drillship, the Tortue-1 well was drilled at a total cost of approximately USD125 million to a total depth of approximately 5,100 meters. The Tortue discovery area has also been renamed Ahmeyim. Kosmos currently owns a 90% interest in the Ahmeyim discovery, along with Société Mauritanienne Des Hydrocarbures et de Patrimoine Minier (SMHPM) at 10%.

27 Apr 2015

Kosmos makes significant gas find

Kosmos Energy (“Kosmos”) has announced that the Tortue-1 exploration well, drilled to test the Tortue West prospect, which forms part of the Greater Tortue Complex, in Block C-8 offshore Mauritania has made a significant, play-opening gas discovery. Based on the preliminary analysis of drilling results and intermediate logging to a depth of 4,630 meters, Tortue-1 has intersected 107 meters (351 feet) of net hydrocarbon pay. A single gas pool was encountered in the primary Lower Cenomanian objective. The Lower Cenomanian is comprised of three excellent quality multi-Darcy reservoirs totaling 88 meters (288 feet) in thickness over a gross hydrocarbon bearing interval of 160 meters (528 feet). A fourth zone 19 meters (62 feet) thick was penetrated within the secondary Upper Cenomanian target over a gross hydrocarbon bearing interval of 150 meters (492 feet). Andrew G. Inglis, chairman and chief executive officer, said: “Volumetrically, the Tortue-1 well has far exceeded our pre-drill expectations and has discovered a large scale gas resource. Our seismic imaging indicates the areal extent of Tortue West could cover approximately 90 square kilometres that will be better defined with appraisal drilling. Importantly, given the results and excellent well-to-seismic calibration, the Tortue-1 well has significantly de-risked our large and under-explored 27,000 square kilometre deepwater position in Mauritania. Our acreage offers substantial follow-on prospectivity including a diverse range of Cenomanian as well as deeper Cretaceous plays and fairways with strong dependency.” An appraisal program is being planned to delineate the Tortue West discovery. In addition, the Marsouin-1 exploration well, located in the central part of Block C-8, is expected to spud in the third quarter of 2015. An exploration program is also being formulated to test the other prospects in the Greater Tortue Complex, which extends into the St. Louis Offshore Profond Block in Senegal, including the Tortue East and Tortue North prospects. In support of this program, a 3D seismic survey acquired over our Senegal blocks in 2014 is currently being processed and interpreted. Located approximately 285 kilometres southwest of Nouakchott in 2,700 meters of water, and drilled with the Atwood Achiever drillship, the Tortue-1 well is now drilling to the planned total depth of approximately 5,250 meters. Kosmos currently owns a 90% interest in the Tortue Prospect, along with Société Mauritanienne Des Hydrocarbures et de Patrimoine Minier (SMHPM) at 10 percent. Since 2012, Kosmos has held rights to conduct exploration in the C-8, C-12 and C-13 contract areas under production sharing contracts with the Government of Mauritania. In March 2015,Chevron Mauritania Exploration Limited, a wholly owned subsidiary of Chevron Corporation (NYSE: CVX), acquired a 30% non-operated interest in the C-8, C-12 and C-13 contract areas under production sharing contracts. Chevron has an option to elect to participate at a 30% interest in the Tortue Prospect, subject to Chevron paying a disproportionate share of their costs related to the Tortue-1 exploration well. The blocks are contiguous, range in water depth between 1,000 and 3,000 meters, and have combined acreage of approximately 27,000 square kilometers.

10 Mar 2015

'Atwood Achiever' to spud MZ-1 well in April 2015

Pura Vida Energy NL (“Pura Vida”) has advised that based on the current rig schedule, the company now expects the Atwood Achiever Drillship to mobilise to the MZ-1 location within Pura Vida’s offshore Mazagan Permit and spud the well during April 2015 instead of March 2015. In accordance with the schedule provided in the company’s December quarterly report, it is advised that the Atwood Achiever has completed a well offshore Morocco and has now moved to briefly complete a well offshore Mauritania for another Operator before returning to handover to the Mazagan joint venture. MZ-1 will target the Ouanoukrim prospect, which has total gross unrisked mean prospective resources of over 1.4 billion barrels, with a high case of over 3.0 billion barrels (refer to ASX announcement of 17 December 2014). Pura Vida is carried for its’ 23% interest in the MZ-1 well for up to USD215 million.

2 Mar 2015

Kosmos set to plug and abandon CB-1 well in Morocco

Kosmos Energy (“Kosmos”) announced today that the CB-1 exploration well located in the Cap Boujdour permit area offshore Western Sahara encountered hydrocarbons. The well penetrated approximately 14 meters of net gas and condensate pay in clastic reservoirs over a gross hydrocarbon bearing interval of approximately 500 meters. The discovery is non-commercial, and the well will be plugged and abandoned. Andrew G. Inglis, chairman and chief executive officer, said: “The CB-1 exploration well was designed to open the frontier Laâyoune Basin by testing the Al Khayr Prospect. While not a commercial find, this first well in the basin has significantly de-risked further exploration by demonstrating a working petroleum system, including the presence of a hydrocarbon charge, as well as effective trap and seal. The well results confirm the substantial exploration potential of our 22,000 square kilometer Cap Boujdour block, which includes a diverse range of independent plays and fairways with multiple prospects. Going forward, the key exploration challenge is finding reservoirs of commercial size and quality. We will analyse the information gathered from CB-1 and integrate it with the additional 3D seismic data we recently acquired to refine our exploration plan, including deciding on the location and timing of a potential second well. The Atwood Achiever drillship will now proceed to Mauritania as planned to test the Tortue Prospect.” Located approximately 170 kilometers offshore in 2,135 meters of water, the CB-1 well was drilled on plan to a total depth of 5,700 meters at a net cost to Kosmos of approximately $85 million. Kosmos has held rights to conduct exploration activities in the Cap Boujdour permit area since 2006 under a petroleum agreement with the Government of Morocco’s Office National des Hydrocarbures et des Mines (ONHYM). Kosmos operates the Cap Boujdour license with 55 percent equity and is joined by its partners ONHYM (25 percent) and Capricorn Exploration and Development Company Limited, a wholly owned subsidiary of Cairn Energy PLC (20 percent). The Atwood Achiever is set to drill the MZ-1 exploration well in Morocco under sublet for Freeport-McMoRan Oil & Gas, with drilling operations expected to begin in late March 2015.

3 Sep 2014

Atwood Oceanics takes delivery of 'Atwood Achiever'

Atwood Oceanics, Inc. (Atwood) announced today the delivery of the ‘Atwood Achiever’ from the Daewoo Shipbuilding & Marine Engineering Co., Ltd. (DSME) shipyard in South Korea. The ‘Atwood Achiever’ has commenced the mobilization phase of its drilling services contract with Kosmos Energy and is expected to arrive in Northwest Africa in early December to conduct a three-year exploration drilling program. Rob Saltiel, Atwood Oceanics President and CEO, commented, "We are very pleased to take delivery of the ‘Atwood Achiever’, the second of our four 'A-Class' ultra- deepwater drillships, from the DSME shipyard. We are eager to begin drilling operations for Kosmos and to demonstrate the extensive capabilities and efficiencies of this state-of-the-art drilling vessel."

3 Mar 2014

Freeport-McMoran Oil & Gas partner secures rig for Magazan permit drilling in Morocco

Pura Vida Energy NL (“Pura Vida” or the “Company”) is pleased to announce the execution of a rig share agreement for the drilling of two wells in the Mazagan permit by the ‘Atwood Achiever’ deepwater drillship. The ‘Atwood Achiever’ has been contracted by Kosmos Energy for a four year period upon delivery from the shipyard in Q3 2014.Under the rig share agreement with Kosmos, two slots have been assigned for the drilling of wells in the Mazagan permit. The first of these slots will be used to drill the Toubkal-1 well and is expected to commence in January 2015. The second slot will be in 2H 2015. The Mazagan permit in Morocco is operated by Freeport-McMoran Oil & Gas.

10 Jun 2013

Atwood secures first contract for newbuild drillship

Atwood Oceanics has secured a first contract for the company’s newbuild drillship the ‘Atwood Achiever’ for operations offshore Morocco with Kosmos Energy. The contract is due to commence upon delivery of the unit from Daewoo’s yard in South Korea with an initial 65 day mobilisation period before the unit starts its firm 3 year contract with a base dayrate of US$595,000. The ‘Atwood Achiever’ is the second of three drillships that will be delivered to Atwood Oceanics, following the delivery of the ‘Atwood Advantage’ in late 2013 which has been contracted by Noble Energy for operations in Israel. Atwood’s final drillship the ‘Atwood Admiral’ is due for delivery in 2015 and is currently not contracted.

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