What is coal bed methane and shale gas?

What is coal bed methane and shale gas?

Coalbed methane is natural gas produced from coalbeds in the same way that methane is produced from other strata. Shale gas is produced from reservoirs composed of shale. Gas shales are often source rocks and the reservoir source for natural gas.

Is coal bed methane the same as natural gas?

2.4 Coal Bed Methane. Coal bed methane (CBM) is an unconventional form of natural gas found in coal deposits or coal seams. It is a primary clean energy source of natural gas.

What is the difference between shale gas and natural gas?

Shale gas has the same composition as natural gas. Every shale gas is a natural gas, the difference between the types of gases are the locations of the reservoirs. Natural gas can be found in big amounts, while shale gas is trapped inside the microcracks of a rock. Read more about liquefied natural gas.

What is the difference between oil shale and coal?

Oil shale may contain between 60 and 90\% mineral matter (non-organic), while coal will contain, by definition, less than 40\%. The kerogen within oil shale is also of different organic composition than coal, which enjoys a more matured organic makeup that is lower in hydrogen and higher in oxygen than oil shale kerogen.

What is called coal bed methane?

Coalbed methane (CBM) is an unconventional form of natural gas found in coal deposits or coal seams and now considered an alternative source for augmenting India’s energy resource. CBM is formed during the process of coalification – the transformation of plant material into coal.

What is coal bed methane and why is it controversial?

Controversy Surrounding Coal Bed Methane Gas Production The controversy surrounding coal bed methane extraction has to do with the use of water during the process and its impact on global climate change. Also, CBM is a fossil fuel which releases CO2, a known greenhouse gas during combustion.

What is shale gas composition?

Shale gas also includes condensates and water. The gaseous components of raw shale gas include sulfur dioxide, hydrogen sulfide, helium, nitrogen, and carbon dioxide. Mercury may also be found in smaller concentrations in most reservoirs where natural gas is obtained.

Does shale gas contain methane?

Shale gas is natural gas trapped within tiny pore spaces in shale formations. It is a hydrocarbon gas mixture. It consists mainly of methane. Other hydrocarbons are natural gas liquids (NGLs) like ethane, propane, and butane, and it also contains carbon dioxide, nitrogen, and hydrogen sulfide.

What is the difference between natural gas and methane?

Methane and natural gas are often used as synonyms, but they are not exactly perfect substitutes. Methane is a colorless, odorless, and flammable greenhouse gas, while Natural gas is primarily methane but contains ethane, propane, carbon dioxide, and water vapor as well.

What is shale coal?

Cannel shale has terrestrial origins, and is often classified as coal. It is made up from the remains of resin, spores, and corky materials from woody plants. It can contain the minerals inertinite and vitrinite.

What is shale good for?

Shale is commercially important. It is used to make brick, pottery, tile, and Portland cement. Natural gas and petroleum may be extracted from oil shale.

What is shale gas Upsc?

What is Shale Gas? Shale is a fine-grained sedimentary rock that can be rich sources of petroleum and natural gas. Shale gas refers to natural gas that is trapped within these shale formations.

What is CBM (coal bed methane)?

Coal Bed Methane ( CBM), also sometimes known as sweet gas, coalbed gas, or coal mine methane ( CMM ), is a form of natural gas extracted from coal beds. To extract the gas, a steel-encased hole is drilled into the coal seam (100 to1500 meters below ground).

What is the difference between coal bed methane and tight gas?

Tight gas is natural gas held in rocks with pores up to 20,000 times narrower than a human hair, such that the gas will not flow freely into a well without fracturing. Coal Bed Methane ( CBM), also sometimes known as sweet gas, coalbed gas, or coal mine methane ( CMM ), is a form of natural gas extracted from coal beds.

What is the difference between coal gas and shale gas?

Most shale reservoirs are actually grading toward silty sands, and are not true shales. With coal gas, the methane molecules are adsorbed onto the coal and are liberated by lowering the pressure. Often the wells at first make only water, which must be produced in order to liberate the gas.

What is the potential of coalbed methane in India?

With one of the largest proven coal reserves, and one of the largest coal producer in the world, India holds significant prospects for commercial recovery of coalbed methane. The country has an estimated 700-950 billion cubic metre of coalbed methane.