Rig: Transocean Marianas

Name Transocean Marianas
Owner Triton Asset Leasing GmbH
Manager Transocean Offshore Deepwater Drilling Inc.
Rig Type Semisub
Sub Type Deepwater Floater
Jackup Type --
Max Water Depth (ft) 7000
Max Drill Depth (ft) 25000
Dimensions (ft) 332 x 266 x 122
Leg Length (ft) --
Competitive Yes

Current Location

Country --
Region --

Drilling Equipment

Drawworks Type National Oilwell Varco 1625 UDBE
Drawworks HP 3000
Mud Pumps Type Continental Emsco FB-2200 Triplex; FA-1600 Triplex
Top Drive National Oilwell Varco TDS-4S
Hookload Capacity (lbs) 1500000

Rig Construction Details

Rig Design Earl & Wright
Rig Model SEDCO 700 (Enhanced)
Year Built 1979
Country of Build Japan
Yard Name Hiroshima Shipyard & Engine Works
Group Yard Name Mitsubishi Heavy Industries Ltd.

Rig Contract Details

Operating Status Retired
Operator

Rig Images

News

9 Sep 2013

HRT announces non-commercial discovery with Moosehead-1

HRT Participações em Petróleo S.A. (HRT) announces that the Moosehead-1 well (2713/16-1) (Moosehead-1), the third offshore well in our exploratory drilling campaign, is a dry hole. This well targeted the Moosehead Prospect, located in Petroleum Exploration License 24 (PEL-24), in the Orange Basin, offshore the Republic of Namibia. The main objective of the Moosehead-1 well was to test the resource potential of Barremian-aged carbonate reservoirs, expected to be equivalent to the Brazil and Angola "pre-salt" reservoirs, within a 546 km2 4-way dip closure, mapped on 3D seismic. Extensive formation evaluation was performed to confirm the nature and quality of the carbonate reservoir and source rock intervals, including wireline logs and sidewall core samples. The Moosehead-1 well encountered approximately 100m of carbonates at the primary target. The nature of the reservoir, though further analysis of data collected will be necessary, appears similar to the "pre-salt" reservoirs as predicted. However, porosity was less developed than expected in this location, and is being considered a dry-hole. Wet gas shows were encountered in the section that increased in wetness with depth. At least two potential source rocks were penetrated, including the well-developed Aptian-age source rock. Indications of source rocks in the deeper rift section were also apparent, though not penetrated. Further analysis of the well sampling will greatly help with continuing exploration on the HRT blocks in Namibia. The Moosehead-1 well was located in 1,716m of water depth and was drilled to 4,170m of measured total depth. The well was drilled, wireline logged and P&A, in a total of 47 days, by the ‘Transocean Marianas’ semi-submersible rig. Operational and safety performance was excellent. This completes HRT’s Namibian drilling campaign and the ‘Transocean Marianas’ is available for sublease.

6 Aug 2013

HRT spuds Moosehead-1 well in Namibia

HRT Participações em Petróleo S.A. (HRT) announces the spud of the Moosehead-1 well (2713/16-1) (Moosehead-1), the third offshore well in its exploratory drilling campaign. This well is targeting the Moosehead Prospect, located in Petroleum Exploration License 24 (PEL 24), in the Orange Basin, offshore the Republic of Namibia. The Moosehead-1 well is located 197 km southwest of Lüderitz, Namibia, and 100 km northwest of the Kudu gas accumulation. Moosehead-1 will test a Cretaceous age, 546 km2 4-way dip closure, mapped on a 3D PSDM seismic data set. The main objective of this well is to test the oil potential of Barremian-aged carbonate reservoirs, expected to be equivalent to the Brazil and Angola "pre-salt" reservoirs. Several source rocks are expected to be penetrated, including the Aptian source rock, which is anticipated to be oil generating according to HRT’s geochemical modeling. Moosehead-1 well is in 1,727m water depth and will be drilled to a projected total depth of 4,100 m by the ‘Transocean Marianas’ semi-submersible rig. The total time estimated to complete the operations is approximately 53 days.

19 Jul 2013

HRT comes up dry with Murombe-1 well

HRT Participações em Petróleo S.A. (HRT) through its wholly-owned subsidiary HRT Walvis Petroleum (Proprietary) Ltd. (HRT Walvis), announces that the Murombe-1 (2212/06-1) (Murombe-1), the second offshore well in our exploratory drilling campaign has been concluded and is a dry hole. This well was targeting the Murombe Prospect, located in Petroleum Exploration License 23 ("PEL 23"), in the Walvis Basin, offshore Republic of Namibia. The main objective of the well was to test the resource potential of the Murombe (Barremian Age) basin floor fan turbidites that demonstrate a well-defined amplitude anomaly on 3D seismic PSDM. The drilling plan was to penetrate the top Murombe reservoir and reach total depth (TD) below the reservoir at 5,658 meters, run the wireline logs, conduct sidewall core sampling, acquire fluid samples and abandon the well. A secondary target, the Baobab (Santonian Age) confined channel complex, would also be penetrated. The Murombe-1 well penetrated the Baobab objective and it contained 36 meters net sand within a 242 meter interval (15% N/G). The average porosity was 19% and the sands were water wet. The well-developed marine source seen in the Wingat-1 well located 15 kilometers east of Murombe-1 was also present above the deeper Murombe turbidite prospect. Ongoing sample analysis will determine the quality of this source interval. The Murombe objective was penetrated and petrophysical evaluation of wireline logs indicates that interval consists of non-reservoir facies with low porosity. The well reached at Total Depth of 5,729 meters. The wireline evaluation program included a quad combo tool and rotary sidewall cores. The Murombe-1 will be completed, considering wireline logging and P&A activities, in a total of 62 days, by the semi-submersible ‘Transocean Marianas’. The ‘Transocean Marianas’ will move 635 kilometers south to PEL 24 to drill the Moosehead Prospect in the northern Orange Basin after concluding P&A activities at the Murombe-1 location. The Moosehead-1 well will target Barremian carbonates and drill to a total depth of 4,100 meters.

2 Jun 2013

HRT spuds Murombe-1 well in Namibia

HRT Participações em Petróleo S.A. (HRT) through its wholly-owned subsidiary HRT Walvis Petroleum (Proprietary) Ltd. (HRT Walvis), announces, on June 1st, 2013, the spud-in of the Murombe-1 (2212/06-1) (Murombe-1), the second offshore well in its back-to-back exploratory drilling campaign. This well is targeting the Murombe Prospect, located in Petroleum Exploration License 23 (PEL-23), in the Walvis Basin, offshore the Republic of Namibia. The Murombe-1 well is located 220 km northwest of Walvis Bay in 1,391 m of water depth. This well is just 15 Km west of HRT’s first well on PEL-23 (Wingat-1) which drill through two excellent oil producing source rocks from which were recovered liquid hydrocarbon. Murombe-1 will test a 1,000 km2 basin floor fan on a way4-dip closure at its highest structural elevation within a turbidite complex. The main objective of this well is to test the resource potential of Barremian aged turbidite reservoirs that have a well-defined seismic amplitude anomaly on the PSDM 3D data set. A shallower secondary objective, the Santonian aged Baobab confined channel complex with turbidite reservoirs, which is between the two oil producing source rocks, will also be penetrated. The Boabab reservoir is expected to be encountered at 3,670 m depth below sea level and the Murombe reservoir is expected to be encountered at 5,090 m depth below sea level. Murombe-1 will be drilled to a projected total depth of 5,360 m by the semi-submersible ‘Transocean Marianas’. The total time estimated to complete the operations is approximately 72 days.

20 May 2013

HRT releases results of Wingat-1

HRT Participações em Petróleo S.A. (HRT) through its wholly-owned subsidiary HRT Walvis Petroleum (Proprietary) Ltd. (HRT Walvis), announces that its first exploration well (Wingat-1 2212/07/1) in a multi well offshore program in Namibia has found oil although not in commercial volumes. This well is located in Petroleum Exploration License 23 (PEL-23), in the Walvis Basin, offshore Republic of Namibia. The well, spudded on March 25th, was drilled in water depths of circa 1,005 meters and has reached a final depth of 5,000 meters. The main objective of the well was to test the resource potential of the Albian age carbonate platform, which was penetrated on targeted depth, but its reservoir quality is much less developed than originally expected. The Wingat well was initially planned to be drilled to a total depth (TD) of 4,127 meters, but because of the potential to drill deeper to test the presence of turbidite reservoirs and the opportunity to penetrate and to sample the main source rock, the consortium decided to go deeper, to a final TD of 5,000 meters. This decision was also supported by the increasing concentrations of hydrocarbon shows present in the well below of the depth of 1,500 meters. The Wingat-1 was drilled in 68 days by the semi-submersible Transocean Marianas (NYSE:RIG) and within the budget. The information obtained, coupled with the results of preliminary studies of all data collected from the well, allowed HRT to identify two well-developed source rocks, which are rich in organic carbon and both are within the oil-generating window. Also, the well encountered several thin-bedded-sandy reservoirs that are saturated by oil. HRT collected four samples of this oil, each of 450cc, and the analysis of these samples indicated the presence of light oil, 38o to 42o API, with minimal contamination. No water-bearing zones were identified in the drilled section. The well is currently in the process of being plugged and abandoned. The fact that the source rock is in the oil window and generating liquid hydrocarbons of excellent quality confirms the source potential of the basin. As such, the results of Wingat-1 Well provide important information that will help calibrating and guiding HRT’s next exploration steps in the Walvis Basin. These source rocks present in the well can charge reservoir intervals of other prospects identified in the license, including Murombe Prospect, which will be drilled next.

25 Mar 2013

HRT spuds Wingat-1 well in Namibia

HRT Participações em Petróleo S.A. (HRT) through its wholly-owned subsidiary HRT Walvis Petroleum (Proprietary) Ltd. (HRT Walvis), announces, on the present date, the spud-in of the Wingat-1 (2212A/07) (Wingat-1), the first offshore well in its back-to-back exploratory drilling campaign. This well is targeting the Wingat Prospect, located in Petroleum Exploration License 23 (PEL-23), in the Walvis Basin, offshore the Republic of Namibia. The Wingat-1 well is located at approximately 200 km to the northwest of Walvis Bay. Its water depth is 1,034 m and it will test an elongated combination trap with a potential P10 area of 381 km2 of which there is a 4-way-structural closure of 42 km2. The main objective of this well is to test the resource potential of the Albian aged carbonate platform that has a well-defined seismic amplitude anomaly in the PSDM-3D data set. These reservoirs are expected to be encountered at approximately 3,950 m of depth below sea-level. Wingat-1 will be drilled to a projected total depth of 4,100 m by the semi-submersible ‘Transocean Marianas’. The total time estimated to complete the operations is approximately 60 days.

7 Feb 2013

Transocean Marianas rig arrives in Namibia ahead of HRT drilling contract

The Transocean Marianas semi-submersible drilling unit has arrived in walvis bay in Namibia ahead of its contract with HRT. The unit will undergo necessary maintenance work for a three to four week period before it is used to drill the Wingat Prospect in the Walvis Basin. The rig will be embarking upon a drilling campaign in the Walvis and Orange basins in Namibia with HRT estimating that up to 7.39BOE can be discovered with it exploration campaign.

15 Jan 2013

HRT Officially Receives Transocean Marianas

The Transocean Marianas semi-submersible drilling rig has officially been handed over to HRT for the start of its contract with the Brazilian operator in Namibia, the unit is now enroute to the country from Ghana and is expected to arrive within three weeks. The unit will undergo 21 days of maintenance before it begins to work on the Wingat prospect where it is expected to drill for up to 60 days. The unit was previously contracted by Eni in Ghana for a three year term from December 2009.

18 Nov 2011

Successful appraisal of the Teak discovery offshore Ghana

Kosmos Energy (NYSE: KOS) announced today that the Teak-3A appraisal well has confirmed a northern extension of the Teak discovery on the West Cape Three Points Block offshore Ghana. The Teak-3A well is located approximately 4 kilometers (2.5 miles) north of Teak-1 and was designed to test the potential structural and stratigraphic extension of reservoirs encountered in the original discovery well. Analysis of well results, including wireline logs, reservoir pressures and fluid samples indicate that the Teak-3A well encountered approximately 35 meters (115 feet) of hydrocarbons in multiple good-quality reservoirs. The analysis identified 13 meters (43 feet) of 36-39 degree API gravity and 22 meters (72 feet) of gas-condensate pay. The hydrocarbon-bearing reservoirs encountered were Campanian and Turonian in age and similar to those seen in the discovery well. Brian F. Maxted, President and Chief Executive Officer, said "The extension of the Teak discovery is a significant milestone in progressing the appraisal and delineation of this field. We have confirmed the presence of a number of hydrocarbon pools in Teak-3A and significantly extended the productive area of the discovery. While more operational work and technical studies will be necessary to fully define the field, we are very encouraged by the result, which gives further momentum for additional development of the resources discovered on our operated block. Our appraisal and delineation programs continue to generate substantial value for Kosmos, and we look forward to a number of additional near-term appraisal and exploration well results." The "Transocean Marianas" semisubmersible drilled the Teak-3A well to a total depth of 3,222 meters (10,571 feet) in 444 meters (1,457 feet) of water. Following the completion of operations at Teak-3A, the rig will be released to another operator. Kosmos anticipates drilling the Teak-4A appraisal well in the second quarter of 2012. Additional appraisal at Teak is being planned for the second half of 2012. West Cape Three Points Block Ownership Interest Kosmos Energy is the operator of the West Cape Three Points Block with a 30.875% interest. Anadarko Petroleum Corporation has a 30.875% interest, Tullow Oil plc has a 26.396% interest, Sabre Oil & Gas Holdings Limited has a 1.854% interest; and the Ghana National Petroleum Corporation has a 10% carried interest.

About The Rigs Website

What you are seeing is a selection of sample rig information from the Infield Rigs database. If you would like to see more detailed information regarding the unit, please click here to contact a member of the Infield Rigs Team or call us on +44 207 423 5000

Feedback