Question

How do petroleum and natural gas occur in nature?​

Answer 1

Answer:

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.

Answer 2

Answer:

Ans; petroleum is found at moderate depth between two layers of impervious rocks. petroleum deposits are usually found mixed with salt water. Petroleum being lighter than salt water,floats over it . natural gas is found above petroleum ;it is trapped between the rock cap and the petroleum layer.