Carefully treat the "shale gas revolution"

April 2011, the U.S. Department of Energy's Energy Information Information Administration (EIA) released a report, the global shale gas recoverable reserves of 187 trillion cubic meters, of which the United States was 24.4 trillion cubic meters (about 13%), China is as high as 36 trillion cubic meters (about 20%), ranking first in the world.Proppant March 2012, the Ministry of Land for the first time disclosed the geological resource potential of shale gas 134.42 trillion cubic meters, recoverable resource potential of 25.08 trillion cubic meters (excluding Tibet region).
Comparison of these two sets of official statistical data, you can find its recoverable reserves of shale gas evaluation, there are big differences. However, China's Ministry of Land and published these figures are only based only on technical feasibility, but did not consider the large consumption of water resources, environmental impact, population density aggregation, and a series of pipeline transportation constraints, and geological conditions and the development of our country conditions are not,Frac sand and the United States. In the actual development process, in addition to considering the technical feasibility, but also by many other factors, will eventually be taken out and put into production the amount of resources is much lower than the published figures.
Compared with conventional oil and gas resources, shale gas mining methods are quite different, difficult to develop, the need for high-pressure hydraulic fracturing technique that risk, and the need to consume a lot of water. Data show that high pressure hydraulic fracturing, the average water wells up from one million to four million gallons (0.38 to 15,100 cubic meters), is the conventional hydraulic fracturing wells 50 to 100 times, and of which 50% to 70% of the water in these processes will be consumed, water consumption per well per month is equivalent to China 5000-10000 common household water consumption. Such a huge amount of water for the arid zone of shale gas is undoubtedly a fatal constraint.
Shale gas development in the fracturing process used when fracturing fluid is a fluid not to be underestimated. Each  shale gas  well fracturing fluids used in addition to containing a lot of sand, there are up to 200,000 liters of acid and fungicides, scale inhibitors, lubricants and surfactants chemical additives, flowback fluid also includes high salinity formation water. The fracturing fluid returns to the surface after if disposed of improperly, will be on the surface a serious impact on drinking water sources. Moreover, there may be fracturing fluid through induced geological faults, such as poor sealing of the casing wall channel contaminated underground sources of drinking water.