Technology Research On The Treatment And Recovery Of Fracturing Flowback Fluid In Shale Gas Field

Natural gas plays an important role in the energy structure of China.As a supplement to conventional natural gas,shale gas relieves the shortage of oil and gas resources greatly.The total quantity of recoverable resources of shale gas in China is 25 × 1012m3,which accounts for about 22%of the world's resources,the data just like the US.(24.4 ×1012m3).The Impact of massive hydraulic fracturing in Shale Gas field on the climate is serious:a great deal of water is needed and a considerable amount of fracturing flowback fluid is produced.Recycling is the best solution.As the time goes by,the quantity of tri-and divalent metal ions and total salinity grows quickly.The water quality is not suitable for the fracturing fluid additive.We collected the literature in the world,especially the United States and China.Combined with the status quo of Sichuan Changning-Weiyuan shale gas field,we analyzed the chemical property of fracturing flowback fluid,studied the cause of Water quality deterioration,and the most important,we developed a process to the recovery of waste water.The recycled waste liquid satisfied the engineering requirement.The environmental economical profit is huge.