Rig: Ocean Confidence

Name Ocean Confidence
Owner Diamond Offshore Drilling
Manager Diamond Offshore Drilling
Rig Type Semisub
Sub Type Ultradeep Water
Jackup Type --
Max Water Depth (ft) 10000
Max Drill Depth (ft) 35000
Dimensions (ft) 320 x 238 x 127
Leg Length (ft) --
Competitive Yes

Current Location

Country --
Region --

Drilling Equipment

Drawworks Type Continental Emsco EH-V5000
Drawworks HP 5000
Mud Pumps Type Continental Emsco FC-2200 Triplex
Top Drive National Oilwell Varco TDS-6S
Hookload Capacity (lbs) 2000000

Rig Construction Details

Rig Design Aker
Rig Model H-3.2 (Enhanced)
Year Built 1987
Country of Build Japan
Yard Name Tamano Shipyard
Group Yard Name Mitsui Engineering & Shipbuilding Co., Ltd.

Rig Contract Details

Operating Status Destroyed


8 Apr 2014

Drilling update for the Bamboo-1 well

Sterling Energy Plc, provides the following update for the Ntem Concession, offshore Cameroon. Bamboo-1, the first exploration well to be drilled on the Ntem Concession commenced operations on 9 February 2014 and Murphy Cameroon Ntem Oil Co. Ltd (“Murphy”), the operator with 50% working interest, has confirmed that the well, located in 1,600 m of water, has reached a total depth of 4,747 m and evaluation operations have been conducted. The well was designed to target a series of stacked Cretaceous aged, basin floor submarine fans, the main target being the Bamboo fan. The well encountered all pre-drill targets, however analysis of the data indicate that no commercial hydrocarbons were found and the well will now be plugged and abandoned. The data from the Bamboo-1 well will be analysed in detail and the results used to update the assessment of the remaining prospectivity of this large deep-water block that covers some 2,319 km2. The current phase of the Ntem concession runs to April 2015, with the option to extend the exploration term by a further two years. Sterling Cameroon Limited (“Sterling”) has a 50% non-operated working interest in the Ntem Concession. Murphy, under the terms of the farm-in agreement signed in 2011, will pay Sterling’s share of the costs for the drilling of the Bamboo-1 well.

10 Feb 2014

'Ocean Confidence' spuds the bamboo prospect in Cameroon

Sterling Energy Plc, the AIM listed oil & gas exploration and production company (AIM: SEY), is pleased to provide the following update for the Ntem Concession, offshore Cameroon. The operator, Murphy Cameroon Ntem Oil Co. Ltd (“Murphy”), has confirmed that drilling operations have commenced on the Bamboo-1 well using the Ocean Confidence, a fifth generation semi-submersible drilling rig. The well, located approximately 56 kilometres from the coast of Cameroon, has an estimated target depth of 4200 metres true vertical depth sub-sea (TVDSS) and will be drilled in a water depth of approximately 1600 metres. Drilling operations are anticipated to take approximately 60-70 days. Sterling Cameroon Limited (“Sterling”) has a 50% non-operated working interest in the Ntem Concession. Murphy will pay Sterling’s share of the costs for the drilling of the Bamboo-1 well. The Bamboo prospect is a basin floor fan target within the highly prospective Upper Cretaceous play. A series of stacked fan targets have been identified and will be intersected by the Bamboo-1 well with the primary objective estimated to have a mean un-risked, gross prospective resource of 422 million barrels of oil and 170 billion cubic feet of gas, a total of some 450 million barrels of oil equivalent.

22 Jan 2014

First Syn-rift Discovery Announced in the Deepwater Angola Pre-salt

Cobalt International Energy, Inc. ("Cobalt") (NYSE:CIE) in partnership with the National Concessionaire Sonangol and the Block 21 partners announces the first discovery in the Syn-rift interval in the Bicuar #1A Pre-salt deepwater exploratory well offshore Angola. The well was successfully drilled to a measured depth of 5,739 meters and encountered approximately 56 meters (180 feet) of net pay from multiple Pre-salt intervals. Results of an extensive logging, coring and fluid acquisition program confirmed the existence of both oil and condensate in multiple intervals. No free gas zones or water contacts were observed. All well data was collected via open hole logging technology. This is Sonangol’s and Cobalt’s fourth deepwater Pre-salt discovery offshore Angola. The Bicuar #1A well is of particular significance as it is the first discovery of mobile hydrocarbons that have been tested in the deeper Pre-salt Syn-rift reservoir. After running production casing, the well was temporarily abandoned. Following full processing and integration of all subsurface data collected from the well, the Block 21 partners will evaluate any additional activities necessary to assess Bicuar’s commerciality. The Bicuar #1A well was drilled to total depth in only 59 days, approximately 63 days ahead of schedule. Cobalt, as operator, owns a 40 percent working interest in Block 21. Partners include Sonangol Pesquisa e Produção, S.A., Nazaki Oil and Gaz, and Alper Oil Limitada. “The Syn-rift discovery in Bicuar validates the presence of a viable seal and trap with quality reservoir rocks in the deeper reservoir section,” said James Farnsworth, Cobalt’s Chief Exploration Officer. “These characteristics have been present in similar features in the Campos Basin of Brazil and will be key to expanding the potential of the broader Angola Kwanza Basin Pre-salt. We are also excited with how quickly Bicuar 1A was drilled, while never compromising our commitment to safety and environmental protection. Continued performance of this type would allow us to drill wells at nearly half the cost we had anticipated.”

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