Based on horizontal well vertical to the underground reservoir fluid flow approximation level way wells length distance is paved on the reservoir, can obtain the confluence area and capacity several times or even several times larger than the vertical wells, the hot extraction and penetration of injection of research at home and abroad. The gravel pasted filter horizontal seepage problems under the condition of laying the horizontal well with physical gravel filter seepage flow uniformity simulation test, the seepage flow deviation rate, flow rate distribution uniformity and the working head pressure of horizontal well pipe, critical working head pressure and the two parameters of the same 0.05MPa the thought of horizontal well seepage flow distribution characteristics and working head pressure is highly linear correlation, and proves that the “congruence” theory as the boundary condition on the horizontal pipe seepage analysis and calculation, with large error does not tally with the actual situation.