View of the Shell operated Brent-C (Charlie) Oil Platform. The Installation is located in the Brent oilfield in the UK part of the North Sea. According to Shell’s decommissioning proposals, it will leave behind the remains of four platforms in the Brent oil field. Shell estimates three of those platforms contain 640,000 cubic metres of oily water and 40,000 cubic metres of oily sediment with a total content of more than 11,000 tonnes of oil.