Is coal seam gas LNG?
Coal seam gas now accounts for about 80% of the Queensland’s domestic gas supply2. … This is the first time in the world that gas from unconventional reservoirs has been used for LNG export.
What is the difference between coal bed methane and coal seam gas?
Although CMM is similar to CBM in that it is a subset of the methane found in coal seams, it refers specifically to the methane found within mining areas (e.g., within a mining plan), while CBM refers to methane in coal seams that will never be mined.
Is coal seam gas good or bad?
Some chemicals used in drilling and hydraulic fracturing, and naturally occurring contaminants released from the coal seam during mining, could harm human health, given sufficient dose and duration of exposure. This potential harm includes increased risk of cancer.
How is coal seam gas extracted?
Coal seam gas is natural gas found in coal deposits, typically 300-600 metres underground. … To extract it, wells are drilled through the coal seams and the water pressure is reduced by extracting some of the water. This releases natural gas from the coal.
Why coal seam gas is bad?
Coal seam gas extraction can affect water in a number of ways: it could contaminate underground water if there’s a leak that enters a water source; affected water could travel between underground water sources; loss of pressure could cause fluid to move between connected underground sources; or it could contaminate the …
What is the difference between coal seam gas and natural gas?
Conventional natural gas and CSG are chemically similar. CSG is almost pure methane; conventional gas is around 90 per cent methane with ethane, propane, butane and other hydrocarbons making up the remainder. The difference between CSG/shale gas and conventional gas is the type of geological rock they are found in.
Why is coal bed methane?
Methane is generally considered a cleaner form of energy than traditional coal and oil. Exploration costs for CBM are low, and wells used to extract CBM are cost effective to drill. Because methane is less dense than oxygen, it rises to the surface as water pressure is reduced within the coal seam by pumping.
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.
Why Coal bed methane is called sweet gas?
The term refers to methane adsorbed into the solid matrix of the coal. It is called ‘sweet gas’ because of its lack of hydrogen sulfide. The presence of this gas is well known from its occurrence in underground coal mining, where it presents a serious safety risk.
Why is gas bad for the environment?
Gasoline use contributes to air pollution
The vapors given off when gasoline evaporates and the substances produced when gasoline is burned (carbon monoxide, nitrogen oxides, particulate matter, and unburned hydrocarbons) contribute to air pollution. Burning gasoline also produces carbon dioxide, a greenhouse gas.
Is coal seam gas clean energy?
Coal seam gas is a non-renewable energy resource that is a by-product of coal. It is a ‘pure’ and ‘non-toxic’ gas and for this reason has attracted a lot of commercial interest. During the process of coal formation, biogenic and thermogenic methane gas forms.