Oil and gas

Delić, Dunja (2009) Oil and gas. Bachelor's thesis, Faculty of Science > Department of Biology.

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Oil and gas are known as fossil fuels. Oil is the residue of organic waste (primarily microscopic plankton floating in seas, and also land plants) that accumulated at the bottom of oceans, lakes, and coastal areas. Over millions of years, this organic matter was collected beneath successive levels of sediments. Pressure and underground heat "cooked" the organic matter, converting it into hydrocarbons (oil and natural gas). The droplets of oil liquid migrated through small pores and fractures in the rocks until they were trapped in permeable rocks. In such a reservoir, the lightest gas fills the pores of the reservoir rock as a "gas cap" above the oil. All crude is processed in a refinery to turn it into useful products like gasoline, jet fuel, home heating oil, and industrial fuel oil. It’s also important to mention what influence does oil have on natural environment. Processing and using oil and gas has negative influence on nature, because of the carbon-dioxide that ends up in atmosphere. Also, big ecological catastrophes happen when oil leaks from tankers into oceans and seas. Plants and animals, living in the area struck by the disaster, vanish for good, and it takes a very long time for that biological eco-system to recondition. Oil and gas are used as source of energy, but the supply of those sources is getting fewer. In the future, we should try to use other sources of energy, such as energy of Sun, water, wind, bio energy.

Item Type: Thesis (Bachelor's thesis)
Supervisor: Cvetko Tešović, Blanka
Date: 2009
Number of Pages: 15
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 17 Dec 2014 10:19
Last Modified: 17 Dec 2014 10:19
URI: http://digre.pmf.unizg.hr/id/eprint/3530

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