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环形非均质油藏,反映主要油藏外形的变化是使用半分析模型研究确定不稳定压力特征曲线反映。本文研究发展了以前的半分析研究工作,主要集中在井眼附近“交替区”内的不稳定压力反映上。已给出的重要结论是:关于交替区与非交替区之间转换周期的性质和持续时间。本文还介绍了已经提洪的信息,即正确的结论已经用数值模拟(的方法),在以前的研究中给出,本文的具体研究表明,半对数直线表示非交替区与贮存系数无关。本文研究提出,计算交替区和非交替区流度的方程式,使用常规的试井数据图解分析计算交替区的半径和表皮系数。
The annular heterogeneous reservoir, which reflects the change in the shape of the major reservoirs, was studied using a semi-analytical model to determine the characteristics of the unstable pressure response. This paper studies and develops the previous semi-analytical studies, mainly focusing on the reflection of unstable pressure in the “alternation zone” near the borehole. The important conclusion that has been given is that of the nature and duration of the conversion cycle between alternating and non-alternating zones. The paper also presents the information that has been proposed. That is, the correct conclusion has been given by numerical simulation. It is given in previous studies. The specific study in this paper shows that the semi-logarithmic straight line indicates that the non-alternation zone has nothing to do with the storage coefficient. In this paper, we propose to calculate the equations of fluid flow in alternating and non-alternating zones and calculate the radii and skin coefficients of alternating zones using conventional well test data.