Environmental unknown

U.S. experience shows that  shale gas  water issues involved is much more complex than conventional oil and gas, some of the emissions more special, only the general industrial wastewater emission standards difficult to regulate.
In 2010, researchers at the University of Pennsylvania, "American Academy of Sciences," the author said in Pennsylvania using fracking shale gas areas, underground methane content in drinking water than the undrilled area 17 times higher.Fracturing proppant (See Articles 2011 No. 36 "shale gas flooding solving")
Worrying is that methane is the main component of shale gas, the emission standards in China, the methane simply not considered industrial emissions.
Hydraulic fracturing fluid composition, but also a focus of controversy. U.S. three Democrats in April 2010 in a report that the United States 14 oil and gas companies in the past five years, shale gas exploitation in use for about 2.95 million cubic meters of fracturing additives, including 750 kinds of chemical products, and toxic substance benzene and lead.
If you do not return the fracturing fluid leak or cause a timely manner, the impact on the ecological environment should not be underestimated. According to Yale University, one pair of the environmental impact of shale gas survey, some U.S. shale gas operators, the waste shipped directly to the public sewage treatment plant. Report said "This approach is very bad," because shale gas wastewater is one of the most common pollutants salt, public sewage plants not designed to take into account the removal of soluble solids and therefore can not deal with, and ultimately a lot of salt is discharged into bodies of water.
In the new financial reporter interview, many frontline in China engaged in shale gas exploration and production test of the Chinese, foreign persons to respond to the above environmental concerns.ceramic proppant Many of them are optimistic that the shale gas environmental issues and people usually do not think so big.
Geological Survey Division of Land and Resources said one person, Chinese shale gas buried deep, about 3000 m -4000 m, more than a few hundred meters depth of water layer deep underground lot, sandwiched between the two multiple layer of impermeable rock, thus fracturing fluid contamination of groundwater is unlikely.
More front-line sources, shale natural gas well drilling fluids as synthetic oil-based mud, a short time can be natural degradation. Fracturing fluid main ingredients are water and sand, less than 0.5% of the additive ingredients, most of the everyday life of common non-toxic substances.
Caixin reporters in China "shale gas development plan (2011-2015)", also find a similar argument with these people.
However, these claims could not completely dispel the public's environmental concerns. Some environmentalists said the new financial reporter questioned, shale gas water consumption is an indisputable fact that 70% of fracturing water can not be recycled, the water will permanently remain in the stratum; Also, if shale gas well casing cracked or cementing quality standard, then the possibility of contamination of groundwater is not without; Again, less than 0.5% of the additive chemicals are not completely nontoxic, whether the public has the right to allow each company announced its list of chemical additives it?
From a practical point of view, although the U.S. shale gas industry, the environmental aspects of popular local people accused, but in Chinese counterparts seems that Americans already quite high environmental standards.
An expedition back in the U.S. financial industry, told reporters the new to the United States deal with the price per cubic meter of wastewater, Chinese enterprises are currently unable to afford. He worried about the U.S. shale gas environment, is built on the basis of high input, from the majority of Chinese enterprises in environmental protection, low standard situation, the future of shale gas business is unlikely to really implement high environmental standards.