关键词: 分支, 水平井, 产能, 保角, 变换

Abstract: This paper gives the productivity of wells by conformal transformation and equivalent filterate resistance method.Comparing it with Табаков and Joshi's formula indicated that they didn't distinguish the assumption of uniform flux from the assumption of infinite conductivity.The influences of the branch number and the horizontal section length of multibranch wells on productivity are discussed.The productivity of horizontal well with longer horizontal section is greater than the productivity of multiple deviation wells,if the length of all branches is the same with horizontal section length of a horizontal well.The productivity formula given here is theoretically correct,and can be used in the design and the productivity estimation of multibranch wells.

Key words: branch, horizontal well, productivity, conformal transformation