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脉冲试井用来确定油藏的传导系数和储存能力,通过改变激动并(脉冲井)的产量并在附近观察井(响应井)上观察压力响应来进行脉冲试井。 本文给出考虑井筒储存和井壁的表皮效应的脉冲试井理论模型。以往研究多采用切线法,这种方法局限性很大,常给解释结果带来误差。本文引入割线法,可以在压力曲线的任一位置做平行线时,明显提高了解释精度。
Pulse well testing is used to determine the conductivity and storage capabilities of a reservoir. Pulse well testing is performed by varying the output of the excited and (pulsed) well and observing the pressure response at nearby observation wells (response wells). In this paper, a theoretical model of a pulse well test considering wellbore storage and sidewall skin effect is given. In the past, more studies using tangent method, this method is very limited, often to explain the results of the error. In this paper, the secant method is introduced, which can significantly improve the interpretation accuracy when parallel lines are used at any position of the pressure curve.