Green: You should not worry too much

For the development of  shale gas , lay most concerned about environmental issues. When shale gas development has just started, the United States had a short documentary film "GasLand", which show the development of shale gas lens of environmental pollution, such as fracturing fluids contaminated river water, because the tap water containing methane ignition when Burning ...... render a terrible picture. This allows people who have not seen the shale gas preconceptions its labeled as "high pollution, non-green" hat. In this regard, there was an American commentators humorously quoted Western proverb: When the truth is not enough time to put on pants,Fracturing proppant rumor has bare buttocks streets shouting. Shale gas development on the environment is so unfriendly really do?
Shale oil and gas exploration and development of oil and gas in the dense, based on a breakthrough and developed, and its main techniques are similar. First drilling. Horizontal wells and has implemented more than 150 years of vertical wells just drill travels in a different direction, possible environmental pollution drilling fluid (mud with complex types of additives), floor oil is basically the same, handled properly can really pollute the environment. But this issue has long been resolved.
Currently, the drilling process and ensures complete mud, oil does not leak, completely recyclable and harmless treatment. Moreover, the use of recycled materials can be used repeatedly,ceramic ball floor oil and associated gas flaring are also recycled or. Such as less than this, the construction unit will be ordered rectification, fines or cancel construction qualifications. Clearly, the current oil industry has been doing it. Otherwise, attach such importance to the environment today, can survive it?
Secondly, the environmental community is most concerned about fracturing. Principle is the use of hydraulic fracturing to fracturing fluid (rarely completely with water, you want to add more variety of chemicals) with sand (multi-purpose fine pure quartz sand, can also be used manually fired ceramic) will be pressed out of the dense rock small cracks, but after fracturing fluid flowback from the wellhead to shift left in the seam with sand as a support to prevent fracture closure. These artificial joints difficult to guide low grade oil and gas flowing into the wellbore being mined. It is very difficult high-tech process, the pressure opening pressure is not small, but the pressure is too large may also be the target layer are also outside the rock cracks.
Stratum of the few left in the fracturing fluid will contaminate groundwater it? We know that for people to use and communicate in groundwater and surface water are at the surface, while the vast majority of shale oil and gas development in the deep, even more than conventional oil and gas but also deep. This is because in most cases in the shale oil and gas generated within the upward migration and accumulation in the porous reservoir. Implementation of shale fracturing between aquifers and surface often several kilometers across hundreds of non-permeable layer. When people are aware of the possible pairs of shallow groundwater or surface water contamination can be avoided when the intention formation with China Unicom. If you really there "GasLand" shows the case of water containing large amounts of methane, it actually can be directly utilized. This is the kind of unconventional gas - water soluble gas in Japan, has been put into economic development.
It is for environmental needs, at home and abroad has begun to study a smaller impact on the environment, and even non-hazardous and more efficient drilling, fracturing fluid. Shengli has successfully developed independent non-toxic, biodegradable synthetic-based drilling fluid instead of water-based, oil-based drilling fluid. Chinese Academy of Engineering, Shenyang honest being developed especially for the development of shale oil and gas fracturing supercritical carbon dioxide.
Many people also worry that the large amount of hydraulic fracturing and affect the environment. This is a problem, but it need not worry too much. We in the Northwest Territories often specialized in playing well or well field to join the pipeline near the small lake to resolve. Shale oil and gas wells is quite dense formal development, most of the water can be reused. American shale gas production company had announced ChesapeakeEnergy comparison of different energy water: to produce water per million British thermal units (gallons) meter, Pakistan Knight (America's most famous shale gas producing areas) 1.47 shale gas, coal 2-8, 8-20 conventional oil, oil shale 22-56. Seems that shale gas development is not water as much as the legend, but should be less.
As some people worry that fracturing caused by the earthquake is even more worrying. Analogy is a large reservoir can be a huge load increment can be triggered to regulate micro-seismic crustal balance, but its magnitude is very low and never cause harm. Fracturing and stress state of underground development impact than an order of magnitude lower large reservoir. Instead, rock fracturing generated microseismic fracture monitoring fracturing and inverted to become a powerful tool for development effectiveness in shale gas development in the rapidly evolving technology and it became a branch.