Question

Explain the process of formation of petroleum.

Answer 1

Hint: Petroleum is a fossil fuel derived from ancient fossilized organic materials, such as algae and zooplankton. Vast amounts of these remains settled to sea or lake bottoms where they were covered in stagnant water or sediments such as mud and silt.

Complete step by step answer:
-Fossil fuel is used to refer to buried combustible organic deposits, formed from decayed plants and animals that have been converted to crude oil, coal, natural gas, or heavy oils by exposure to pressure and heat in the earth's crust.
-With an increase in depth settling of multiple layers, there is a buildup of intense heat and pressure. Due to this the organic matter first turns into a waxy material known as kerogen and then changes with more heat to turn into liquid and gaseous hydrocarbons via a process known as catagenesis.
-The formation of petroleum occurs from hydrocarbon pyrolysis in a variety of mainly endothermic reactions at high temperature or pressure, or both. Since oil is lighter than water, it did not mix with water and got raised to the superficial rocks, which did not allow it to pass through them. Petroleum is a mixture of various useful substances. Thus, it is refined to separate these useful by-products in petroleum refineries by the process of fractional distillation of petroleum.

Note:
For the formation of petrol there is a particular window of temperature that the zooplankton must find. If it is less than this window temperature, the oil will remain trapped in the form of kerogen, but too hot and the oil will be changed into natural gas. This ideal temperature is achieved by organic material rich deposit at an appropriate depth, a porous and permeable rock for accumulation and a sealing mechanism must be present to prevent it from escaping to the surface.