The final phase of drilling and running completions are scheduled for 2011. Production from phase one was originally anticipated in 2008, but was delayed due to change in ownership and the leak in August 2009. The four horizontal oil wells, including a gas re-injection well of the Montara field, were batch drilled and suspended. Coogee initiated a phased development of the field to enable inclusion and optimisation of wells in phase two, on dynamic reservoir results from phase one. Phase two included development of three production wells. Phase one included development of six production wells and one infection well. "A subsea tie-back system provided greater flexibility on FPSO location."Ĭoogee planned the development of the Montara project in two phases with an investment of $700m. Following detailed inspection by structural and equipment experts, the removal process will be carried out by specialist contractors. SeaDrill will carry out the removal process of the West Atlas drilling rig from the Montara field. On 4 December 2009, the West Atlas drilling rig was formally condemned by its insurers after it caught fire in November 2009. The rig can work at a water depth of 400ft and has a drilling depth of 30,000ft. The rig was designed and built in 2007 by Keppel Fels at the Keppel Shipyard in Singapore. West Atlas is an independent leg cantilever type Jack-up. SeaDrill provided the offshore drilling rig West Atlas to Coogee for the Montara field development. Final delivery, hook-up and commissioning of the Montara Venture FPSO is still pending following the leak in August 2009. The FPSO is capable of handling 40,000bpd 60 million cubic feet a day of gas compression for re-injection/lift, and has a storage capacity of 900,000 barrels of oil. The topside of the platform contains a helideck, crane, dry wellhead trees, production manifold, gas re-injection wellhead and multi-phase flow metering equipment. ![]() It has an additional slot for future wells and has the capacity to accept a subsea tie-back in the future. "The 146,251dwt tanker Freeway was converted into an FPSO by Tanker Pacific in 2009." The FPSO consists of a four-level 750t wellhead platform, which can fit five production wells and one gas-injection well. The FPSO was named Montara Venture on conversion and will be permanently moored in a water depth of 80m. Technip carried out the project concept engineering of the platform. On 7 August 2009, using its pipelay barge Java Constructor, Clough lifted and set the 750t Montara topside on the jacket. Clough, an Australian engineering and construction company, was responsible for installation of the platform. The jacket was designed to overcome foundation requirements of a maximum of 25m pile penetration. This, in turn, translated into lower costs for Coogee. ![]() The modern jacket design of the platform included a four-legged launch tower structure, which eliminated the need for a heavy-lift vessel for installation. The nominal launch weight was 2,192t and the structure was set up base first. Designing of the platform required significant analysis to optimise the pile configuration to sustain an even distribution of pile head weight.Ī total of nine piles in an optimised configuration at the bottom of the substructure were created. In addition the marine environment was subject to cyclonic storms, which further created challenges for the design team. The design team had a tough time planning the platform due to the weak soils at the location of the oil field. WorleyParsons, an Australian professional services provider for the oil and gas industry, designed the Montara platform. ![]() Other conversion works included processing provisions for crude separation and gas compression, and reinjection facilities. The STP was supplied by Norway’s Advanced Production and Loading. Conversion work also involved installation of a unique and flexible internal submerged turret production (STP) system. The conversion process of the Freeway tanker involved extension of life for continuous service on site for a minimum of 20 years without dry docking. A 146,251dwt tanker, Freeway, was converted into an FPSO by Tanker Pacific in 2009 in Jurong Shipyard. For the Montara development project Coogee planned to use a floating, production, storage and offloading (FPSO) vessel with tie-backs planned to the Skua, Swift and Swallow fields.
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