塑性流体型稠油油藏垂直井产能预测公式

A new productivity prediction equation of vertical wells in plastic fluid type heavy oil reservoirs.

稠油在地层中的流动具有非牛顿流体特性。为了研究其对产能的影响,将稠油视为宾汉流体。基于其启动压力梯度,推导出了宾汉流体的运动半径和运动边界压力求取公式在此基础上推导出了垂直井在稳态状态下的产能预测公式。分析了某些参数对产能的影响,特别是启动压力梯度的影响。

Heavy oil always has non-Newton rheological behavior in the formation. In order to study its influence on productivity of vertical wells, we assume fluid as Bingham one. Moving radius and moving boundary pressure are derived based on its star-tup pressure gradient. Productivity of vertical wells is derived on the above three parameters. Compared with other equations which being considered without the above 3, influence of some parameter, especially start - up pressure gradient, on the productivity of vertical wells is analyzed in the new equation. Calculation correlation shows that non-Newton rheological behavior of the heavy oil has certain influence on productivity prediction results.