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 issue with coal seam gas?
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 …
Is coal seam gas the same as fracking?
Coal seam gas (CSG) and the gas that comes from shales are chemically very similar. They generate the same amount of heat and CO₂ when burned in your heater or at an electricity power plant. … Shale reservoirs always require fracking, while perhaps only half of coal seam gas reservoirs require fracture stimulation.
How is coal seam gas formed?
Coal seam gas (CSG) is primarily methane – a colourless and odourless gas, found in coal deposits formed over millions of years from fallen trees and other plant matter. Natural gas collects in underground coal seams by bonding to the surface of coal particles.
Why is gas bad?
Methane is the second-most important greenhouse gas after carbon dioxide and a key driver of climate change. Using gas for energy creates greenhouse gas pollution, driving climate change in three ways: Burning gas for energy produces carbon dioxide, the most significant greenhouse gas.
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 good?
Using CSG to generate electricity reduces CO2 emissions by up to 70 per cent compared with coal, and gas is critical to us meeting our greenhouse reduction targets. Gas is also the perfect partner to back up intermittent renewable energy sources such as wind or solar.
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 a seam of coal?
: a bed of coal usually thick enough to be profitably mined.
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.
For what coal is used?
Coal is primarily used as fuel to generate electric power in the United States. The coal is burned and the heat given off is used to convert water into steam, which drives a turbine.
Who owns Arrow Gas?
Notes to editors: Arrow Energy is an incorporated joint venture between Shell (50%) and PetroChina (50%). QCLNG (QGC) is a Shell-operated joint venture between Shell (73.75%), CNOOC (25%) and Tokyo Gas (1.25%)
What is meant by shale gas?
Shale gas refers to natural gas that is trapped within shale formations. Shales are fine-grained sedimentary rocks that can be rich sources of petroleum and natural gas (see Fig. 1.4). Shale gas is trapped within the pores of this sedimentary rock.
Will gas be phased out?
Gas heating in new build houses will be banned by 2025, but gas hobs will still be allowed, according to Chancellor Philip Hammond. New homes will use heat pumps and energy-efficient measures to heat them.
Is gas a clean energy?
Natural gas is often praised as a clean energy alternative. It burns more cleanly than other fossil fuels, emitting lower levels of harmful emissions such as carbon monoxide, carbon dioxide and nitrous oxides. It produces less greenhouse gases than other fossil fuels do.
What’s wrong with natural gas?
Cleaner burning than other fossil fuels, the combustion of natural gas produces negligible amounts of sulfur, mercury, and particulates. Burning natural gas does produce nitrogen oxides (NOx), which are precursors to smog, but at lower levels than gasoline and diesel used for motor vehicles.