Effects Of Coal Bed Methane
The use of technology and other chemical insight and researches have provided us with relatively new methods of producing and conserving energy resources day by day. One such important inclusion in the recent sources of energy is the use of coal bed methane (CBM) or coal mine methane (CMM) which is a natural gas that is extracted from coal deposits and from coal beds. Some countries like Australia and the United States have already started preferring CMM over other conventional energy resources. The term coal bed methane refers to the adsorbed methane into the coal. It is considered a valuable energy with reserves and production. The general way of extraction of CMM, the ways of storing this kind of energy and the effects of CMM are presented here as follows.
The extraction of CBM from coal beds or coal deposits is a quite tedious process. CBM can be recovered from underground coal and using various methods. It can also be extracted from unminable coal apart from extracting CBM using a conventional method where vertical and horizontal wells. The water content from the dug coal is removed using hydrostatic pressure. Finally the released adsorbed gas is taken from the seam. Another way of extraction is using conventional gas reservoirs but this extraction has pretty high risk involved since methane stones are not like normal sandstones. In some areas large steel drilling machines are also used to extract CBM.
Since CBM is a relatively new energy resource the impacts of the same are not so deeply known. But there are some effects of using this ebergy resource which are listed as below.
- Since CBM extraction involves the emission of methane gas, the greenhouse effect is caused.
- Extraction of CBM from coal bed is done by drilling land which may disturb the wildlife and the ecosystem of that particular region.
- Reservoir prediction and management is an uphill task as far as CBM extraction is concerned. The water levels and construction difficulties must be met properly.
- Discharge of water from ground level to downstream may alter the underground water tables which may lead to changes in underground water levels.
- Disposal of salinized water after extraction may harm the entire environment which may cause genetical diseases in plants.
CBM is treated as one of the most futuristic way of energy production and is a rapidly emerging energy field too. The major part of CDM which is under study is the communication link and information sharing among the producer, government and all NGOs. This communication gap must be bridged in a correct and an efficient way if this energy source is to be used in the long run. There is a very little doubt in the fact that CBM is one of the vital energy sources to look forward.