Abstract: The necessities and scientific background of research on a well-aquifer system is briefly introduced in this article,and the main problems in accurately simulating the small-scale well flow are also point out.The focus of this paper is mainly on the three basic methods of dealing with a "well-aquifer" system: line source(sink) method,High KV in wellbore and seepage-pipe flow model.The basic theory and disadvantages and advantages of these methods are summarized.In this paper,we also analyze seve...