The study research the productivity formula in low permeability reservoir with vertical wells combined with fracturing well of the five point rectangular pattern, seven spot pattern, nine spot pattern, as well as the productivity of anti-nine rhombus fractured vertical well mixed pattern, and to which of the five-point rectangular pattern and the law rectangular fracturing well pattern optimization analysis. The analysis revealed widening well spacing, narrow row spacing, so that the shape factor well network within a certain range, can improve the development effectiveness, and when length of the crack and area of well spacing were given, can determine the length and width of rectangular pattern.

In recent years, many people have made some research in horizontal wells of low permeability oil reservoirs. In order to further refinement of the existing research, this paper utilized conformal transformation and Potential superposition principle method to optimize and analyze the productivity of rhombus inverted nine-spot horizontal well pattern in low permeability reservoirs.On the basis of other parameters are given, by analyzing the relationships of dimensionless length and shape factor, dimensionless length and dimensionless output of horizontal well, he optimal shape factor and optimal dimensionless output under different well net area, reservoir thickness, and dimensionless length in low permeability reservoirs was got. The results show that it is suitable for using little well net area in low permeability reservoirs.