Shale gas { Environmental problems
The extraction and use of shale gas can affect the environment through the leaking of extraction chemicals and waste into water supplies, the leaking of greenhouse gases during extraction, and the pollution caused by the improper processing of natural gas.
Shale gas worse than coal for three impacts and better than renewables for four. It has higher photochemical smog and terrestrial toxicity than the other options. Shale gas a sound environmental option only if accompanied by stringent regulation.
Among the environmental problems attributed to the development of shale gas pleev, are the following: 1. seismic risks; 2. groundwater pollution; 3. emissions; 4. surface water and soil pollution.
Groundwater pollution The most frequently discussed issue is the contamination of groundwater. The problem lies in the fact that during the fracturing oil shale formations in deep microcracks may arise through which methane and fracturing fluid can migrate into the overlying aquifers, intended for the selection of drinking water.
Emissions In West Virginia, according to drillers, they encountered a pocket of methane in an abandoned coal mine at a depth of about 300 m, and the blowout preventer had not yet been established.
Seismic risk Another risk associated with the extraction of shale gas, which has recently won the attention is the possibility that the drilling and fracturing can cause earthquakes of the magnitude-low.
Surface water and soil pollution Fluids useful for modern hydraulic fracturing operation, usually at 95 -98% of water and proppants, and a small component have different chemical reagents.
Скачать презентацию Shale gas Environmental problems The extraction
Shale_gas (4).pptx