The site editor may also be contacted with questions or comments about this Open Educational Resource. Please send comments or suggestions on accessibility to the site editor. It occurs deep under the crust of earth either alone or along with oil above the petroleum deposit.Some wells dug into the earth produce only natural gas whereas other produce natural gas as well as petroleum oil.It is formed under the earth by the decomposition of vegetables matter lying under water.This decomposition is carried out by anaerobic bacteria in the absence of air.Natural gas is a … It is used as a feedstock in the manufacture of fertilizers, plastics and other commercially important organic chemicals as well as used as a fuel for electricity generation, heating purpose in industrial and commercial units. Those hydrocarbons with a larger chemical structure than that of methane are destroyed much more rapidly than they are formed. Performance & security by Cloudflare, Please complete the security check to access. In india,natural gas has been found in Tripura,Rajasthan, Maharashtra,krishna-godavari delta. These microorganisms cannot tolerate even traces of oxygen and are also inhibited by high concentrations of dissolved sulfate. 2)A 15-foot storm surge killed more than 8,000 people on the low-lying island. The College of Earth and Mineral Sciences is committed to making its websites accessible to all users, and welcomes comments or suggestions on access improvements. Last Updated on March 20, 2019 By Mrs Shilpi Nagpal Leave a Comment. Natural gas is a gas consisting primarily of methane (C H 4).Natural gas is found in deep underground rock formations or associated with other hydrocarbon reservoirs in coal beds and methane clathrates (which trap or contain molecules). Associated natural gases are hydrocarbon gases that co-exists with the crude oil and may be present as: (1) gas dissolved in the crude oil (solution gas), (2) a distinct gas phase in contact with the crude oil (free gas), or (3) both. They consist of animal and plant remains. This gas is termed unconventional gas and occurs in “tight” (i.e., relatively impermeable) sandstones, in joints and fractures or absorbed into the matrix of shales, and in coal seams. It consist mainly of methane with small quantities of ethane and propane. Petroleum and natural gas are nonrenewable sources of energy. 8. 5)It can be used directly for heating purposes in homes and industry. In the context just described, the terms “associated gas” and “non-associated gas” refer to the association of the gas with a liquid hydrocarbon phase. However, the production of gas from tight sandstones has been greatly enhanced by the use of horizontal drilling and hydraulic fracturing, or fracking, techniques, which create large collection areas in low-permeability formations through which gas can flow to a producing well. In most sedimentary basins the vertical potential (and sediment volume) available for gas generation exceeds that of oil. 4)It does not leave any residue on burning. Petroleum is also called crude oil or oil. It is derived from both land plants and aquatic organic matter and is generated above, throughout, and below the oil window. 1)It is a god fuel because it burns easily and produces a lot of heat. 3)It is used as a fuel in transport vehicles.It is a good alternative to petrol an diesel in vehicles because it is a cleaner fuel and does not cause much air pollution. Such has been the case with tight gas, shale gas, and coal-bed methane. What is the volume of the gas under the new . Coal B. Hydrocarbon C. Natural gas D. Petroleum. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. Another way to prevent getting this page in the future is to use Privacy Pass. Natural gas - Natural gas - Origin of natural gas: Natural gas is more ubiquitous than oil. 2. coal-bed methane. 2. It occurs deep under the crust of earth either alone or along with oil above the petroleum deposit.Some wells dug into the earth produce only natural gas whereas other produce natural gas as well as petroleum oil.It is formed under the earth by the decomposition of vegetables matter lying under water.This decomposition is carried out by anaerobic bacteria in the absence of air.Natural gas is a fossil fuel. Natural gas formation (which is a gas) is essentially the same as the formation of oil (a liquid) and thus takes a significant amount of time with natural gas beginning to form millions of years ago.
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