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You have not really asked a question. I will state a few facts about offshore platforms and perhaps you can come back with a specific question.

An offshore platform has separators to remove water and gas from the produced oil. Each platform is uniquely designed because no two oil fields are the same in oil composition and fluid rates of oil, water and gas. Unlike a chemical plant, the fluid rates (or "feeds") of oil, water and gas can change greatly over the life of the field, and the design of the facility must take this into consideration.

Offshore production platforms may send the processed oil through pipelines which will go to onshore storage tanks and then be sent to refineries. The produced oil may be sent to tankers, which will deliver oil to the refineries.

Produced gas may be flared (burned) at the platform. Due to the heat of the gas, a flare tower, located some distance from the platform may be used for burning the gas. The flaring of gas is generally considered the least favorable alternative, due to environmental and energy conservation issues. Produced gas may be compressed and reinjected into the formation to maintain pressure. If an adequate market exists, it may be sent via pipeline to shore, and distributed to the local market. It may also be liquified as LNG and transported by tankers. This requires enormous investments.

Produced water may be re-injected into the producing formations to maintain pressure. If it is to be disposed of offshore, the water must be sufficiently clean as to not contaminate the ocean water.

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