From the point of view of reservoir engineering , hydraulic fracture is hypertonic with oil layer with a certain directional length, width and height of the geometry. After single well fracturing, hydraulic fracture system consisting of the wellbore , and reservoir connectivity when the area is much larger than the area of the wellbore without
maide hydraulic fracturing significantly reduces the time of the formation of a single well production flow resistance , which is after fracturing a single the basic mechanism of increasing production wells. When the drilled reservoir, near the bottom zone due to drilling and other injuries leaving decline, so that by fracturing
maide Hydraulic fracture through the injury zone ( generally hurt with less than 2m) into uninjured reservoir, so that did not hurt the oil layer the oil flow through hydraulic fractures into the wellbore , restore and enhance the natural capacity of the well . When single well fracturing, often both mechanisms work.
In general, the relatively high permeability reservoir, due to the pressure of the production wells into production soon entered the quasi-steady flow conditions , the output can be used to predict the radial flow equation solving , generally , it can be used with McGuire and Sikora Prats way to solve it. Conversely , in the relatively low permeability reservoir , production well pressure operation, the liquid oil will long remain unsteady flow conditions , the impact of the crack should be solved in a non- steady-state conditions , can be applied to non- steady typical curves plates or single-phase reservoir simulation flow Agarwal et al state or Holditch et al . If the water in the reservoir and for the overall development of fracturing its production forecast dimensional numerical simulation of three-phase reservoir need to use . Using models and calculation methods yield the correct pressure , is the basis for economic optimization of fracture design .
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