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Fracking is the short term for hydraulic fracturing which involves drilling high pressure fluids such as chemicals or sand appended in water into the ground at a high pressure to fracture rock formations in order to gain natural gasses, brine and petroleum inside by increasing the flow rate. Fracking was founded in 1947 as an experiment and was commercially applied in 1949. This method is usually used in wells for shale gas, tight gas, coal seam gas and tight oil Within the past decade, the combination of hydraulic fracturing with horizontal drilling has uncovered many shale deposits across the country and brought large-scale natural gas drilling to a variety of areas. The operation of fracking occurs after a well has been drilled and steel …show more content…
Once the fractures have been created, the injection begins to terminate and the fracturing fluids start to flow back to the surface. Proppants such as sand or ceramic beads, which were initially injected as part of the mixture, remain in the target formation to hold open the fractures. Typically, a mixture of water, proppants and chemicals are pumped into the rock or coal formation. There are, however, other ways to fracture wells. Occasionally fractures are created by injecting gases such as propane or nitrogen, and sometimes acidizing appears synchronously with fracturing. Acidizing is the process of pumping acid, which is usually hydrochloric acid, into the rock formation to dissolve some of the rock material which in turn cleans out pores and enables the gas and fluid to flows more quickly into the well. A number of studies have shown that approximately 90% of fracking liquids may continue to linger underground. Fracturing fluids that are used tend to return to the surface and are sometimes referred to as flowback, and these wastes are normally stored in open pits or tanks at the well site before being

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