关键词: 存储效应, 数学模型, 典型曲线, 压力恢复期, 解释方法, 井筒存储, 流动期, 原始地层压力, 比例因子, 存储系数

Abstract: In DST,a long time build-up test is genarally followed by a short flowing period.By introducing the factor Fd,this paper presents a new mathe-matical model for the interpretation of the whole DST pressure history,with a consideration of the wellbore storage in the build-up period,which is taken as a continues flowing period of the slug flow.In addition,this paper presents a set of new type curves on the basis of the numerical solution of the model by finite difference method.Their application will eliminate some problems which commonly appear in the currently used methods.Finally,interpretation procedure is described in detail,and illustrated further by the examples.