关键词: 产量递减, 油井产量, 曲线图, 预测

Abstract: It is naturally that oil production changes with time continously. Therefore instantaneous and accumulative oil production can be calculated theoretically in the study of production declining curve by differetiation and integration. However, there is a misunderstanding for many years in its application. That is, monthly (quarterly or annually) oil production are treated as a continuous with respect to time and integrated, while it is essentially discontinous and the accult is expressed in a cumulative form. In order to solve the in consistence between the continuous theoretical formulas and time disconfinvity in this paper,formulas are presented which can calculate cumulative oil production from discrete time interval. Examples are presented showing their practicality.