Depletion development is the main method to exploit tight gas reservoir, and well interference is the unavoidable factor in well network deployment. According to the target area, a new integral fracturing well pattern arrangement model for horizontal wells in tight gas reservoir was set up based on the non-overlapping pressure sweep ellipse areas of all fractured horizontal wells. Firstly, by solving the major semi-axis and minor semi-axis of the equivalent ellipses by commercial reservoir simulator, the move among the target area and equivalent ellipses was simulated from the view of elastic potential energy, and the well pattern arrangement model could be resolved as acquiring the minimum potential-energy function, which was solved by quasi-physical algorithm owing to the high solving efficiency. The method was applied in M block, which is a rectangle tight gas reservoir with an average porosity of 7.2% and an average permeability of 0.43×10^-3 μm². Economic evaluation demonstrated that less fractured horizontal wells could achieve more net benefit when the gas price is low, while more fractured horizontal wells should be developed when the gas price is high.

tight gas reservoir  /  horizontal well  /  integral fracturing  /  well pattern arrangement  /  quasi-physical algorithm