Rig: Deepwater Millennium

Name Deepwater Millennium
Owner Transocean Deepwater Mauritius
Manager Transocean Offshore Deepwater Drilling Inc.
Rig Type Drillship
Sub Type Ultradeep Water
Jackup Type --
Max Water Depth (ft) 10000
Max Drill Depth (ft) 30000
Dimensions (ft) 726 x 138 x 66
Leg Length (ft) --
Competitive Yes

Current Location

Country --
Region --

Drilling Equipment

Drawworks Type --
Drawworks HP 6600
Mud Pumps Type National Oilwell Varco 14-P-220 Triplex
Top Drive National Oilwell Varco TDS-8S
Hookload Capacity (lbs) 2000000

Rig Construction Details

Rig Design Samsung/Reading & Bates
Rig Model Falcon Double Hull
Year Built 1999
Country of Build South Korea
Yard Name Geoje (Koje) Shipyard
Group Yard Name Samsung Heavy Industries (SHI)

Rig Contract Details

Operating Status Retired
Operator

Rig Images

News

4 Jan 2016

Woodside Discovers Gas Offshore Myanmar

Woodside advises that the Shwe Yee Htun-1 exploration well in Block A-6 in the Rakhine Basin, located in the western offshore area of Myanmar, has intersected a gross gas column of approximately 129 m. Approximately 15 m of net gas pay is interpreted within the primary target interval. The well reached the planned original total depth (TD) of 4810 m, referenced from the rig rotary table. Following drilling, wireline logging was conducted and confirmed the presence of a gas column through pressure measurements and gas sampling. The well was subsequently deepened to a final TD of 5306 m. The well was spudded on 27 November, reached its original target on 23 December and wireline logging concluded on 29 December. Shwe Yee Htun-1, in Block A-6, targeted one of many identified channel complexes that run over a large anticlinal feature, the Saung Anticline. Woodside CEO Peter Coleman said he was pleased by the successful evaluation of the prospect, which provided evidence of a working petroleum system in the Rakhine Basin deep water. “Further analysis will be undertaken to understand the full potential of the play, but this de-risks a number of leads which will now be matured,” Mr Coleman said. “This discovery is an encouraging outcome for future exploration and appraisal activity in the area.” With a 40% interest in A-6, Woodside Energy (Myanmar) Pte Ltd (Woodside Myanmar) is the joint operator with MPRL E&P Pte Ltd (MPRL E&P) (20% interest). MPRL E&P is operator with respect to government liaison and Woodside Myanmar is the operator with respect to all other operations, including drilling. Total E&P Myanmar holds a 40%, non-operated interest. Woodside has interests in six blocks in the Rakhine Basin (details overleaf). The six permits make up 46,000 km2 and represent 20% of Woodside’s global exploration acreage.

8 Apr 2015

Woodside hits gas at Pyxis-1

Woodside Petroleum Ltd (“Woodside”) has announced that the Pyxis-1 exploration well in production licence WA-34-L has intersected approximately 18.5 metres of net gas within the Jurassic sandstone target. The well reached a total depth of 3,347 metres. Wireline logging has confirmed the discovery through the recovery of gas samples to surface and establishment of a gas pressure gradient. Woodside Executive Vice President Global Exploration Philip Loader said: “Given its location, this successful exploration outcome offers future tie-back potential to Woodside’s existing Pluto infrastructure.” The Pyxis-1 well is located in Production Licence WA-34-L, within Western Australia’s Dampier Sub-Basin and is located approximately 15 km north of Woodside’s producing Pluto Gas Field infrastructure. The well was drilled by Transocean’s Deepwater Millennium drillship, which is contracted to Woodside until April 2016. Woodside Burrup Pty. Ltd. is the operator and 90% equity owner of WA-34-L. Kansai Electric Power Australia Pty. Ltd. and Tokyo Gas Pluto Pty. Ltd. each hold 5% equity.

2 Jul 2014

Woodside hits gas at Toros-1 well in Australia

Woodside advises that the Toro-1 exploration well in permit WA-430-P has intersected approximately 150 metres gross gas and 65 metres net gas within the Mungaroo Formation target. The well reached a total depth of 3724 metres, referenced from the rig rotary table. Following drilling, wireline logging has been conducted and confirmed the presence of a gas column through pressure measurements and gas sampling. The well will now be plugged and abandoned as planned. Toro is located in Western Australia’s Exmouth Sub-Basin and is within 22km of Woodside’s existing Ragnar-1A discovery. The well was spudded by Transocean’s ‘Deepwater Millennium’ drillship on the 2nd May 2014. Woodside Executive Vice President Global Exploration Philip Loader said, “This successful exploration outcome builds Woodside’s gas volumes within the Exmouth Sub-Basin creating options for maximising the value of our Australian assets.” Woodside is the operator and 70% equity owner of WA-430-P. Mitsui E&P Australia has the remaining 30% equity.

28 Sep 2011

Enyenra-3A well result announcement

Tullow Oil plc (Tullow) announces that the Enyenra-3A appraisal well, in the Deepwater Tano licence offshore Ghana, has successfully encountered oil in high quality sandstone reservoirs. Pressure data indicates that the Enyenra-3A well has confirmed an up-dip extension of the Enyenra oil field. Located 6.5km north of the Owo-1 discovery well and 14km north of Enyenra-2A, the well was drilled to test the up-dip extent of the Enyenra oil field. Results of drilling, wireline logs, samples of reservoir fluids and pressure data show that Enyenra-3A has intersected 17 metres of 35o API net oil. Pressure data confirms a continuous oil column of at least 365 metres and that the oil at Enyenra-3A is in static pressure communication with both the Owo-1 discovery well and the Enyenra-2A appraisal well. The Deepwater Millennium drillship drilled Enyenra-3A to a total depth of 4,031 metres in water depths of 1,102 metres. On completion of drilling operations, prior to flow testing the Enyenra field in late 2011, pressure gauges will be deployed in Enyenra-2A and Enyenra-3A to determine reservoir connectivity. The drillship will depart the Deepwater Tano block in late October having recently been replaced by the Sedco Energy drillship. The Sedco Energy will later drill the Enyenra-4A well to further appraise the downdip extent of the field. The well will be located 6.8km south of Enyenra-2A and over 20km downdip from the Enyenra-3A well and a result is expected at the end of the year. The Enyenra-5A well also is then likely to be drilled north of Enyenra-3A to test the ultimate updip extent of the 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). Elsewhere in West Africa, Tullow now expects to announce the result of the Montserrado-1 well offshore Liberia during October.

11 Mar 2011

Enyenra-2A appraisal well proves major light oil field

Tullow Oil plc (Tullow) announces that the Enyenra-2A appraisal well, in the Deepwater Tano licence offshore Ghana, has successfully encountered oil in excellent quality sandstone reservoirs. Good evidence of communication with Owo-1 confirms that the Owo oil discovery, now renamed Enyenra, is a major light oil field. Located over seven kilometres south and down-dip of Owo-1, the well was drilled to appraise the Upper and Lower Channels of the Enyenra oil field. Results of drilling, wireline logs, samples of reservoir fluids and pressure data show that Enyenra-2A has intersected 21 metres of net oil pay in the Upper Channel and 11 metres of net oil pay in the Lower Channel. Pressure data from the Upper Channel has also demonstrated that the oil is in communication with the Owo-1 well. Oil pressures in the Lower Channel suggest it may also be in communication with the deeper pools seen in Owo-1 and its sidetrack. The well also tested a deeper Turonian fan where five metres of gas-condensate bearing sandstones were intersected. Interpretation of the extent and thickness of this zone away from the well is ongoing. The Deepwater Millennium drillship drilled Enyenra-2A to a total depth of 4,234 metres in water depths of 1,674 metres. On completion of operations, the well will be suspended for later use. Prior to flow testing, pressure gauges will be deployed to measure reservoir connectivity. The drillship will remain in the Deepwater Tano block to complete the drilling of the Tweneboa-4 well. The next appraisal well will be Enyenra-3A located up-dip to the north of the Owo-1 discovery. 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).

10 Jan 2011

Tweneboa-3 appraisal well confirms Greater Tweneboa Area resource potential

Tullow Oil plc (Tullow) announces that the Tweneboa-3 appraisal well in the Deepwater Tano licence offshore Ghana has successfully encountered gas condensate in excellent quality sandstone reservoirs. Results of drilling, wireline logs and samples of reservoir fluids, together with the well's down-dip position confirms the Greater Tweneboa Area resource base potential. The well, located over six kilometres south-east of the Tweneboa-2 well and 12 kilometres south-east from the Tweneboa-1 discovery well, was planned with two deviated boreholes to test separate areas of the Tweneboa field. The first leg was drilled to calibrate the potential of an area with a very weak seismic response. Within prognosis, this leg encountered thin reservoir sands and approximately 9 metres of gas condensate pay. The well was then sidetracked 550 metres west, targeting the significant Ntomme anomaly, an area of strong seismic response. This leg successfully encountered a gross vertical reservoir interval of approximately 65 metres containing 34 metres of net gas condensate pay in two zones of high quality stacked reservoir sandstones. Work is underway to integrate seismic, pressure and hydrocarbon phase data in order to progress development options for the Tweneboa and Enyenra (Owo) fields in the Greater Tweneboa Area. Tweneboa-3 was drilled by the Deepwater Millennium drillship to a total depth of 3,906 metres in a water depth of 1,601 metres. On completion of operations, the well will be suspended for future use in the field development. The rig will remain in the Deepwater Tano block to drill the top-hole section of the Tweneboa-4 appraisal well which will then be suspended before moving to drill the high impact Enyenra-2A well which will appraise down-dip from the Owo-1 oil discovery. The significant oil discovery, made by the Owo-1 exploration well has now been named the Enyenra field. Tullow (49.95%) operates the Deepwater Tano licence and is partnered by Kosmos Energy Ghana (18%), Anadarko Petroleum (18%), Sabre Oil & Gas (4.05%) and the Ghana National Petroleum Corporation (GNPC) (10% carried interest).

15 Nov 2010

Oil discovery in the Mercury-1 exploration well offshore Sierra Leone

Anadarko Petroleum Corporation (NYSE: APC) today announced the Mercury-1 exploration well offshore Sierra Leone encountered approximately 135 net feet of oil pay in two Cretaceous-age fan systems. Mercury is the company's second deepwater test in the Sierra Leone-Liberian Basin and was drilled to a total depth of approximately 15,950 feet in about 5,250 feet of water. "The Mercury well demonstrates that the stratigraphic trapping systems we've identified are working, and that the petroleum system is generating high-quality oil," Anadarko Sr. Vice President, Worldwide Exploration Bob Daniels said. "In the primary objective, the Mercury well encountered approximately 114 net feet of light sweet crude oil with a gravity of between 34 and 42 degrees API, with no water contact. An additional 21 net feet of 24-degree gravity crude was encountered in a shallower secondary objective. "These results continue to build momentum in the basin and enhance our confidence in the team's seismic interpretation and geologic modeling," added Daniels. "We are preserving the wellbore for potential re-entry, DST (drillstem testing) or a down-dip sidetrack to further delineate the reservoir's areal extent, quality and deliverability. We also plan to continue working with the government of Sierra Leone and our partnership to accelerate exploration and appraisal activity in the area in 2011." The Mercury discovery is located in offshore block SL-07B-10 approximately 40 miles east-southeast of Anadarko's previously announced Venus discovery. Anadarko holds an interest in more than 4.6 million acres on five deepwater blocks offshore Sierra Leone and Liberia, and has identified more than 17 prospects and leads on 3-D seismic on this acreage. Once operations are complete at the Mercury well, the company has committed to mobilize the drillship to Ghana to accelerate the appraisal program at the Owo and Tweneboa fields, which the company anticipates sanctioning in 2011. Anadarko operates block SL-07B-10 with a 65-percent working interest. Co-owners in the block include Repsol Exploracion Sierra Leone, S.L. (25-percent working interest) and Tullow Sierra Leone B.V. (10-percent working interest).

16 Sep 2009

Oil discovery in the Venus-B1 exploration well offshore Sierra Leone

Anadarko Petroleum Corporation (NYSE: APC) today announced a deepwater discovery at the Venus exploration well in block SL 6/07 offshore Sierra Leone. The Venus B-1 well was drilled to a total depth of approximately 18,500 feet in about 5,900 feet of water and encountered more than 45 net feet of hydrocarbon pay. Venus is the first deepwater test in the Sierra Leone-Liberian Basin. "The Venus discovery confirms the existence of an active petroleum system in the basin and enhances the prospectivity of our vast West Africa acreage position," said Bob Daniels, Anadarko Sr. Vice President, Worldwide Exploration. "With Jubilee on the east and Venus on the west, we have established bookends spanning approximately 1,100 kilometers (700 miles) across two of the most exciting and highly prospective basins in the world. Anadarko and our partners are evaluating the initial results of the well and the forward plan for the prospect, and anticipate additional drilling in the area. We are optimistic that the continued success of our West African Cretaceous program will create substantial value for our stakeholders as well as the people of West Africa through continued investment and increased activity. Anadarko plans to drill two to five wells in the trend next year." The Venus prospect is one of Anadarko's more than 30 identified prospects and leads on its West Africa acreage position, which includes interests in almost 8 million acres across 10 blocks offshore Sierra Leone, Liberia, Côte d'Ivoire and Ghana. Anadarko operates seven of the blocks and the majority of the identified prospects with an average working interest of approximately 40 percent. The company plans to continue its West Africa drilling operations in the Cretaceous Trend by drilling the South Grand Lahou exploration well in block CI 105 offshore Cote d'Ivoire once activities are completed at the Venus discovery well. Anadarko operates the Venus well with a 40-percent working interest. Co-owners in the discovery include Woodside (25-percent working interest), Repsol (25-percent working interest) and Tullow (10-percent working interest).

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