How is Petroleum Formed?
Petroleum is one of nonrenewable natural source. It needs thousand years to form an area of petroleum mining and the process can’t be separated from chemical reaction. Petroleum is called natural source since algae lives in insipid lake and also in the sea.
            After algae had died, they will precipitate in the bottom of sediment cavity and form source rocks. Source rocks is kind of rocks that contain Carbon (High Total Organic Carbon). This rocks can be the pure result of precipitation in the lake, delta, and also the sea. The forming of source rocks from algae is so specific. That is why, not all sediment cavity will contain petroleum or gas. If Carbon is oxidized, those carbon chains will not be next processed.
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