Abstract The authors have numerically simulated periodic wellbore flow due to inflow of a lower-enthalpy fluid at a shallow feed zone, while a higher-enthalpy fluid flows in at a deep feed zone. Typical flow patterns such as constant and periodic flows appear depending on dimensionless parameters, which has been investigated extensively. Generation of the periodic flow is governed by a simple nature described using a mean specific enthalpy of the shallow and deep reservoirs weighted by their productivity indices as well as a modification factor of the weight. The findings provide a useful guideline for forecasting generation of the periodic flow as well as developing an effective mitigation measure.

中文翻译：

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低焓流体流入产生周期性井筒流动条件的理论研究

摘要 作者数值模拟了由于低焓流体在浅进料区流入而高焓流体在深进料区流入而引起的周期性井筒流动。典型的流动模式，如恒定和周期性流动，取决于无量纲参数，这已被广泛研究。周期性流动的产生由一个简单的性质控制，该性质使用由其生产力指数加权的浅层和深层储层的平均比焓以及权重的修正因子来描述。研究结果为预测周期性流量的产生以及制定有效的缓解措施提供了有用的指导。