Study on Seepage Field of Horizontal Well Patten

In order to visually reflect the pressure distribution characteristics and the flowing tracks of reservoir fluid in five-spot horizontal well pattern, this paper obtain the pressure distribution equation of transient flow in horizontal well pattern by means of the potential superposition principle, present the calculation method of seepage field streamline, and study distribution rule for seepage field. It is shown that the seepage field of horizontal well pattern is sensitive to the horizontal permeability, horizontal well length and production time. There is a reasonable well spacing under a given horizontal permeability, which can maximize the productivity of horizontal well. The drainage area of production well will increase with the increasing of horizontal well length, which can improve the productivity of horizontal well. The longer the production time is, the higher the sweep region of jection well is, then the degree of the reserve recovery increase. The seepage field plots generated by this method can provide an important basis for remaining oil analysis, horizontal well pattern optimization and injection strategy.