Get How Is Oil And Natural Gas Formed UK. Anoxic conditions and intense pressure cause a gradual transformation in petroleum. Over millions of years, layer after layer of sediment and other plants and bacteria were formed.
Natural gas is a fossil fuel.
Well over 200 different hydrocarbons can be identified in a the gas and oil are then transported by pipes either by land to a refinery or to a ship (tanker). This is described as sour gas and has to be purified before it can be processed. The oil flowed from the source rock and accumulated in thicker, more porous limestone or sandstone, called reservoir rock. Even after oil has formed in the rock, pressure continues to rise, squeezing the oil out or upwards through rocks that have more pores, or spaces, within them.