Shell plans to develop its Prelude and Concerto gas discoveries, located in the Browse Basin off the northwest coast of Western Australia, using its Floating Liquefied Natural Gas (FLNG) technology. (Earlier post.)
|Artistic impression of the Shell FLNG design. Source: Shell. Click to enlarge.|
The dimensions of Shell’s FLNG facility are approximately 480 by 75 meters (1,575 by 246 feet), with the capacity to produce around 3.5 million tonnes per annum of LNG, as well as Condensate and LPG. When fully ballasted, the FLNG facility weighs around 600,000 tonnes.
Shell’s FLNG solution means the facility can be re-deployed to another gas field once production at one gas field is complete, and its standardized “design one, build many” approach allows repeatability gains to be captured during design and construction phases. It is suitable for more distant offshore fields, remains on station during harsh metocean conditions such as cyclones, and can process a wide range of gas compositions.
In July, Shell Gas & Power Developments BV signed a master agreement with a consortium comprising Technip and Samsung for the design, construction and installation of multiple FLNG facilities over a period of up to fifteen years.
Shell’s FLNG solution is an important development for the LNG industry, with its ability to process gas in situ over an offshore gas field, reducing both project costs and the environmental footprint of an LNG development.
Shell is the operator and 100% equity holder of the WA-371-P permit, containing the Prelude and Concerto fields, which would be developed sequentially. While pending a Final Investment Decision, the Prelude FLNG Project is now in the Front End Engineering and Design (FEED) phase of development. FEED for Prelude is being undertaken as part of Shell’s contract with the Technip-Samsung Heavy Industries consortium for the design, construction and installation of multiple FLNG facilities.
Shell is currently working on the environmental and production approvals for the Prelude FLNG Project, with the Environmental Impact Statement soon to be released for public comment. This follows a successful drilling campaign in WA-371-P, in which all twelve commitment wells were drilled, with discoveries of the Prelude and Concerto fields.