Application of Point Source Function to Well Test Theory of Horizontal Wells and Multi-lateral Wells

Horizontal wells and multilateral wells have already been one of most important technologies for developing offshore oilfield. Based on point source function, this paper sets up a mathematical model with unsteady-state seepage flow for horizontal wells and multilateral wells, with integration of multiple knowledge such as reservoirs geology, seepage theory, Green function, partial differential equations and computational mathematics. The model is solved in Laplace space. Percolation characteristics of fishbone multilateral well are studied especially.