Abstract: Fishbone well is of advantage for increasing the contact area of wellbore and reservoir and effectively improving development effect of low permeability fractured reservoirs. But affected by the well-type structure, the well pattern, etc., its water drive characteristic is complex and presents many problems, for instance, the water breakthrough time is difficult to determine and the water cut rises quickly. Based on numerical simulation technique, this paper presents the water drive development effect of low permeability fractured reservoir with vertical injector plus fishbone producer well pattern, including drawing water flood streamline distribution and water cut changing chart, and summarizes the regularity of the water cut rising by using such a pattern, being of a certain significance to actual reservoir development.

Key words: fishbone well, well pattern, water flooding, reservoir numerical simulation, streamline simulation