CSG is natural gas (methane) which is sourced from underground coal formations, sometimes known as coal bed methane (See Figure 1). CSG is increasingly being used to supply gas to eastern Australia. In conventional gas fields, the gas exists in permeable sandstone reservoirs.
How does coal seam gas work?
Coal seam gas is held in place by water pressure. 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. … In some cases hydraulic fracturing, or ‘fracking’, is used to extract coal seam gas.
Is coal seam gas good or bad?
Coal seam gas is bad for the environment and we should all protest against its use. Genetically modified foods are a part of multinational plans to take over the world’s food supply. Wind farms are dangerous to human health and should be restricted.
Is coal seam gas the same as natural gas?
What is coal seam gas (CSG)? Coal seam gas, or coal bed methane (CBM, is a form of natural gas, typically extracted from coal seams at depths of 300-1000 metres.
Is coal seam gas renewable?
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.7 мая 2012 г.
Why is coal seam gas bad for the environment?
Possible environmental effects: environmental groups have raised concerns that CSG development might cause environmental damage through release of untreated production water at the surface; damage to, and contamination of underground aquifers by hydraulic fracturing; damage to wildlife habitat in sensitive areas and …
How is coal formed?
Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years.
Why fracking is bad?
Hydraulic fracturing, or “fracking,” is revolutionizing oil and gas drilling across the country. However, without rigorous safety regulations, it can poison groundwater, pollute surface water, impair wild landscapes, and threaten wildlife.
What is a seam of coal?
: a bed of coal usually thick enough to be profitably mined.
What does fracking mean?
Fracking is the process of drilling down into the earth before a high-pressure water mixture is directed at the rock to release the gas inside. Water, sand and chemicals are injected into the rock at high pressure which allows the gas to flow out to the head of the well.
What is unconventional natural gas?
Unconventional natural gas includes shale gas, tight gas, coalbed methane, and gas-to-liquids. … Tight gas describes pockets of natural gas located within low-permeability reservoir rock such as sandstone or carbonate. Coalbed methane is methane gas located within a coal reservoir.
What is the difference between shale gas and tight gas?
The most significant difference between shale gas and tight gas is: Shale gas is mostly found trapped in layers of sedimentary shale rocks. Tight gas is found trapped in sandstone or limestone formations with relatively low permeability.
What is the difference between unconventional and conventional gas?
Because they are easier and less expensive to produce, conventional oil and gas were the first targets of industry activity. … By contrast, unconventional resources are trapped in reservoirs with low permeability, meaning little to no ability for the oil or natural gas to flow through the rock and into a wellbore.
Is LNG better than coal?
The cleanest fossil fuel
The combustion of natural gas does not emit soot, dust or fumes. It generates 30% less carbon dioxide (CO2) than fuel oil and 45% less than coal, with a twofold reduction in nitrogen oxide (N0x) emissions and almost no environmentally-damaging sulphur dioxide (SO2) emissions.
How is gas mined?
The process involves high pressured injection of sand, water and chemicals into the coal seam gas well. The injection causes fractures in the coal seam allowing the gas to flow to the surface of the well. … Fracking has been used in coal seam gas operations in both Queensland and New South Wales.
Is natural renewable?
It’s considered renewable because of how easy it is to make, especially compared to nonrenewable energy sources like fossil fuels. … Although natural gases, no matter where we get them from, are cleaner than coal and other fossil fuels, they still produce some carbon emissions.