Legs up, is the choice of the fisherman. In the Draft Brent Decommissioning Programme, and after extensive analysis and consultation, Shell proposes to leave some of the existing infrastructure in place – this consists of the concrete gravity based structures and the storage cells on Brent Bravo, Charlie and Delta, in addition to the footings of the Steel Jacket on Brent Alpha. We have therefore focused our attention on two decommissioning options and examined each one in detail. In the second, hydraulically inflatable wedges called “shims” were inserted as the diamond wire cut progressed, to keep the cut open and stop the wire from being jammed deep in the cut. Construction of the GBS - starting with the cells, Learn more about the Brent Field recommendations, Our proposal for the contents of the cells, Shell Lubricant Solutions for independent workshops, Shell Rimula truck and heavy-duty Engine Oils, Find out about Shell food delivery with Deliveroo, More and cleaner energy solutions for your business, Our home energy offer for households in Great Britain, Changes to Upstream Operational Information Reporting, View Shell Lubricant Solutions for independent workshops, For more information visit the Business Support website, Shell’s ambition to be a net-zero emissions energy business. The continuing computer generated imagery shows the yellow lines dissipating, but the structure continues to rise. Mid view footage of workers dressed in safety gear guiding the red container into place. A close-up of the infographic also shows Alistair’s hand as he points with his pen to various components displaying on the screen. Since 2007 Shell has examined the options for decommissioning the GBS exhaustively, carrying out more than 70 studies and trials to assess each option in detail. Mid-view footage of Katy as she speaks, seen against the slightly out of focus background of an office environment. Further, these substructures provide the advantageous option of using the gravity base for oil storage. Typically, they consist of one or more concrete legs that support offshore oil and gas platforms above a base of oil storage cells. Close-up of Roger Esson as he speaks, seen against an out of focus background of an office environment. Whilst the leg was successfully cut using the method with diamond wire and shims, the difficulties of scaling this test up in a harsh offshore marine environment and then conducting the cut underwater, across a larger diameter under greater compression would be considerable and not without significant technical and safety risk. Although the tested cutting method was successful, and preliminary lifting concepts and means of transport to shore were identified, we believe that the forecasted low-level, very long term potential risks to other users of the sea are outweighed by the very tangible risks to which project personnel would be exposed by operations involved with the cut, lift, transportation and final onshore recycling of the legs if removal was selected. Learn More . The small oil rig monument was introduced to RUST on March 7th, 2019 in the Oil Rig Update . 石油プラットフォーム （せきゆプラットフォーム、oil platform）または 石油 リグ （せきゆリグ、oil rig）は、 海底 から 石油 や 天然ガス を掘削・生産するために必要な労働者や機械類を収容する、海上に設置される規模の大きい海洋 構造物 … The unique South Arne platform sits on a concrete tank which is used to store oil. The resulting base oil is clear and colorless but also has a VI above 120. The location of the remaining structure would be clearly marked on charts and documented in FishSAFE, a database that helps fishermen avoid oil and gas structures in UK waters. Rear view close-up of a worker wearing safety gear using a cutting torch on a part of the structure. 8 shows an illustration of a concrete gravity-based structure (GBS). Once the public consultation period has ended, and the Department for Business, Energy and Industrial Strategy (BEIS) is satisfied that there are sufficient grounds to recommend that this infrastructure be left in place, BEIS will initiate consultations with other signatories to the OSPAR Convention to seek their approval to leave this infrastructure in place. The continuing computer generated imagery zooms slowly out again, showing the base rising slowly, then thick yellow vertical lines below each of the storage cells extend upwards to show the lifting of the base structure. However, binding decisions of the parties to the Convention allow for infrastructure to be left in place in certain circumstances, but only where the competent authority of the State is satisfied that an assessment shows there are significant reasons why this approach is preferable. Computer generated imagery depicting a panning wide view of one of the Brent platforms seen against the background of grey skies above and grey swirling waters below. ABSTRACT This paper describes the main features of the concrete gravity base platform designed for the Brage field in the Northern North Sea. Mar 28, 2014 - MCR-A is a collector riser platform which consists of GBS (Gravity Based Structure) and Topsides. And while the final costs of decommissioning are not yet known, Brent will remain an overwhelmingly positive contributor to the UK treasury. In addition, it is more resistant to oxidation than Group I oils. Shell believes the minimal risk to other users of the sea from leaving the legs in place is manageable and could be minimised by the appropriate navigation and warning measures. In general oils with API gravity of 40 – 45 generate the highest market prices. Nobody’s ever done this before. Aerial view of one of the Brent platforms seen against the background of the ocean. The option to leave the gravity base structure in place, really mirrors what’s already happened in the Norwegian sector where the structures have been left in place with navigation aids on there, to aid shipping and fishing. Fig. Aerial view of one of the platform topsides and the dark blue seas below, pulling back to a wider view of the same. Shell’s conclusion is that the cost, technical feasibility and safety risk of removing the upper part of the legs is disproportionately high, compared to our recommended approach of leaving the legs in place. 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