Research on filtration theory and optimization method of low permeability reservoir injection-production pattern

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.