A compression frame was used to apply 500 tonnes of force to create conditions similar to the offshore cut of the legs below sea level. Float-up of the gravity base structure for Minesto first tidal energy installation in Wales on the 31st of January. Mar 28, 2014 - MCR-A is a collector riser platform which consists of GBS (Gravity Based Structure) and Topsides. Here are some images of what the rig looks like now in the middle of the North Sea. More footage of Katy and James in profile, both focused on a document in front of them on the table. As it is mentioned by the narrator, the legs are shown to be cut short, the top sections no longer visible in the outline. The GBS are made of thick concrete reinforced with steel bars and are ballasted down during installation, anchoring them securely to the seabed. Attempting to lift the structures from the seabed could also collapse them. In general oils with API gravity of 40 – 45 generate the highest market prices. Extreme wide view of the tall legs of the gravity base structure under construction, seen against a pale blue-grey sky. Kindly visit www.lkl.com.my for more details. The legs (which each weigh around 6,000 tonnes) would need to be lifted and secured to preserve their integrity during transportation to shore by heavy lift vessel for dismantling and recycling. High angle view of the ocean and towing vessels below, as from the point of view of the tops of the legs, the storage cells of the base structure also visible below. #malaysia #marine #offshore #oilandgas #design #drafting #construction #fabrication #lklmarine The story of Hunterston A power station, Scotland's first civil power plant and worlds largest when built . Low angle close-up of Katy panning to a close-up of James’ face, both of them focused on the laptop screen in front of them. [Video footage] Low angle footage of an oil platform, planted atop very tall … So having done some deep technical studies…. PLATFORM TIMELAPSE VIDEO. 188.8.131.52 Sleipner A—North Sea Oil Platform Collapse The Sleipner A (SLA-1) platform was used for drilling in the Sleipner gas field in the North Sea. As with option 1, the location of each structure will be marked on all charts documented in the FishSAFE database, and protected by a safety zone. This cuts to a wider view of John and his colleague leaning alongside him, their attention on the onscreen imagery. This process is known as ‘seeking a derogation’ and can take up to eight months to complete. Cells would need to be emptied, sealed and filled with air to induce buoyancy…. Further, these substructures provide the advantageous option of using the gravity base for oil storage. Gravity base structures are among the biggest and most impressive feats of engineering in the oil and gas industry. Close-up of Alistair Hope as he speaks, seen against the slightly out of focus background of an office environment. Four shafts run through the GBS from the base slab to support the topsides facilities, … In addition, it is more resistant to oxidation than Group I oils. GBS were designed to overcome the challenges of producing oil and gas in the North Sea during the 1970s. One of our key contractors came to the conclusion that actually the collision hazard was about 1 in every 10,000 years, so well under any accepted standard. Nobody’s ever done this before. Cutting and removing the upper portion of the concrete legs would be technically challenging and very costly. Reasons could include, for example, that it would be technically difficult to remove the infrastructure, or that the process of removing the infrastructure could be more harmful to the marine environment than leaving it in place. The world's first iceberg-resistant gravity-based structure, the Hibernia platform includes a 41,000-ton topside facility mounted on a 660,000-ton gravity base structure, which … Footage of a vessel rising and dipping in rough seas, the Brent platforms visible in the distance. GRAVITY PLATFORM GBS: gravity based structure-concrete, steel Condeep (concrete deep water structure) :gravity base structure for oil platforms developed and … Close-up of Alistair Hope as he speaks, seen against the slightly out of focus background of an office environment, Based on 30 years of data gathered on North Sea operations…. The light blue shading in the upper frame depicts the sky, and is separated from the dark blue shading of the underwater environment in the lower frame by a white line. They were built in the 1970s to withstand 200 mile an hour winds and waves 25 metres high. The backs of people’s heads are visible in the foreground. Close-up of Roger Esson as he speaks, seen against an out of focus background of an office environment. Footage of the laptop screen and Katy’s hand pressing keys, causing the onscreen graphics to change, while James’ face is partially visible in profile at frame-right. High angle footage of James and colleagues seated either side of the long conference table, this time the windows and white walls behind James forming the background. 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. Hibernia oil field : Located in or next to body of water : North Atlantic Ocean: Located on terrain feature: Hibernia oil field: Inception: November 1997; Different from: Hibernia; 46° 45′ 01.57″ N, 48° 46′ 58.54″ W: Authority control Q5750713. At that time the North Sea pipeline network was still in its infancy, so oil had to be stored temporarily in cells on the seabed then pumped into tankers for transport to market. The other end of the cylinder descends around 700 feet (213 meters) into the ocean depths. Panning bird’s eye view of the tops of three concrete legs, water visible below and land also visible at the top of frame. 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 storage cells and legs are highlighted in orange and yellow respectively as the speaker mentions them. The UK tax payer will be funding part of the cost of decommissioning, so it’s really important that the operators are looking to carry out the work in the most cost effective manner. Under the Convention, it is expected that oil and gas infrastructure will be removed from the marine environment during the decommissioning process. How and when the legs will eventually collapse is difficult to predict, but our studies suggest it is likely that the visible part of the legs would remain in place for 150 to 250 years. Bird’s eye view of one of the Brent platforms surrounded by blue ocean waters. Shell has also considered: Leaving the GBS in place and adding navigation aids, or cutting the legs 55 metres below sea level, in line with International Maritime Organisation guidelines. analysing the technical challenges and feasibility of detaching the structures from the seabed and refloating them; examining how the legs could be cut underwater, raised to the surface, towed to land and disposed of; testing the techniques and equipment required to cut and lift the legs; calculating how long it might take for the structures to degrade and collapse; and. Gravity-based structures: Troll A. Mid-view footage of workers dressed in hardhats and safety gear aboard a platform, blue seas and skies visible in the background. / 46.7504361; -48.7829278 Coordinates: 46°45′1.57″N … Although removing the GBS would support jobs, these would only be on a short-term basis. Tension Leg Platform; Concrete gravity base Platform; FPSO – Floating Production, Storage Offloader; From the above we shall examine the steel jacket fixed platform in the following sections. evaluating the safety risk to other users of the sea if the structures are left 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. More information about the OSPAR Convention, and the institution that was created to implement the OSPAR Convention (the OSPAR Commission) can be found here: This approach is not without precedent. Removing the upper portion of the legs to a depth 55 metres below sea level would be required to comply with the International Maritime Organisation (IMO) recommendation on the partial removal of structures. The resulting base oil is clear and colorless but also has a VI above 120. These test parameters allowed the team to further develop knowledge and techniques. Platform with a total heiõht of 380 m, a deadweight of 750000 t, and a crude oil storage capacity of 2 million barrels (320000 m D) (Fig. Close-up of Bertie Armstrong as he speaks, seen against an out of focus background of an office environment. Legs up, is the choice of the fisherman. Right, visible at frame-left the rest of the many containers aboard platform... 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