Question

1. With a labeled diagram explain occurrence of petroleum and natural gas in
the nature. ​

Answer 1

Occurrence of petroleum: Petroleum occurs at a moderate depth (500 m to 200 m) between the 2 layers of impervious rocks. The petroleum is lighter than It water & hence, floats over it. Natural gas is found above petroleum, trapped between the rock cap & petroleum layer. ... It also contains water, salt and rocky materials.

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