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The mechanism of the effects of anisotropic permeability on well patterns and reservoir development are investigated by coordinate transformation,fluid flow analysis,and reservoir development concepts.Anisotropy of permeability has reconstructive effects on well patterns.The originally designed flooding units are broken up,and new pattern units are made up of the wells that belong to different original units,The behavior possesses strong randomness,and leads to a complicated relationship among the injection and production wells,and unpredictable productivity of the formations.To prevent the break-up of well patterns,well lines should be either parallel or perpendicular to the maximum principal direction of the anisotropic permeability (i.e.the fracture direction).To optimize the development effects of anisotropic formations,the latitudinal and longitudinal well spacing of the well network are calculated from the principal values of the anisotropic permeability.
The mechanism of the effects of anisotropic permeability on well patterns and reservoir development are investigated by coordinate transformation, fluid flow analysis, and reservoir development concepts. Anisotropy of permeability has reconstructive effects on well patterns. The original designed flooding units are broken up, and new pattern units are made up of the wells that belong to different original units, The behavior possesses strong randomness, and leads to a complicated relationship among the injection and production wells, and unpredictable productivity of the formations. To prevent the break-up of well patterns , well lines should be either parallel or perpendicular to the maximum principal direction of the anisotropic fracture (iethe fracture direction) .To optimize the development effects of anisotropic formations, the latitudinal and longitudinal well spacing of the well networks are calculated from the principal values of the anisotropic permeability.