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Formation of Petroleum and Natural Gas

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Occurrence of petroleum - definition

During the past 600 million years incompletely decayed plant and animal remains have become buried under thick layers of rock. It is believed that petroleum consists of the remains of these organisms but it is the small microscopic plankton organism remains that are largely responsible for the relatively high organic carbon content of fine-grained sediments like the Chattanooga shale which are the principle source rocks for petroleum. Among the leading producers of petroleum are Saudi Arabia, Russia, the United States. 

Definition and properties of natural gas - definition

Definition:
Natural gas
 is a naturally occurring hydrocarbon mixture consisting primarily of methane, but commonly including varying amounts of other higher alkanes, and sometimes a small percentage of carbon-dioxide, nitrogen and hydrogen sulphide.
Properties:
Natural gas is a very important fossil fuel because it is easy to transport through pipes. Natural gas is stored under high pressure as compressed natural gas (CNG). CNG is used for power generation

Formation of natural gas - definition

When the dinosaurs and the plants they ate died, the remains were buried under many layers of rock and soil.

Over time, the tremendous heat and pressure created by the layers of earth turned the animal and plant matter into natural gas and petroleum (oil).

Petroleum - definition

Definition:
Petroleum is a dark oily liquid. It has an unpleasant odour. It is a mixture of various constituents such as petroleum gas, petrol, diesel, lubricating oil, paraffin wax, etc.
Properties:
Used as a fuel in light automobiles such as motor cycles scooters and cars.

Process of formation of petroleum - definition

Petroleum was formed from dead organisms that got buried in the sea millions of years ago. These dead bodies got covered with layers of sand and clay. Lack of air, high temperature and high pressure transformed dead organisms to petroleum and natural gas.

Related Concepts

Uses of Petroleum Constituents and Natural Gas

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