论文部分内容阅读
建立了考虑水平井筒内压降影响的水平井向井流动态关系模型 ,为油藏工程和采油工程预测水平井真实的向井流动态关系提供了必要的手段。通过实例计算 ,分析了水平井筒内压降对水平井向井流动态关系的影响。分析表明 :当水平井筒内压降较大时 ,即使油层和整个水平井筒内全部为单相原油流动 ,水平井的 IPR曲线也不再为一条直线 ,而是一条曲线。井筒内压力损失越大 ,单相液流 IPR曲线的这种背离直线的现象越明显 ;对于有底水或气顶的油藏 ,应适当增加水平井筒直径 ,以降低水平井筒内压降 ,从而延缓底水或底气的锥进。
The dynamic model of horizontal well direction that takes into account the effect of pressure drop in horizontal wellbore is established, which provides the necessary measures for predicting the dynamic state of horizontal well flow in reservoir engineering and oil recovery engineering. The influence of pressure drop in horizontal wellbore on the dynamic relationship of horizontal well flow is analyzed through example calculation. The analysis shows that when the pressure drop in the horizontal wellbore is large, the horizontal well IPR curve is no longer a straight line, but a curve, even though all the oil layers and the horizontal wellbore are all single-phase crude oil flowing. The greater the pressure loss in the wellbore, the more obvious the deviation from the straight line of the single-phase flow IPR curve. For the reservoirs with bottom water or gas cap, the horizontal wellbore diameter should be increased appropriately to reduce the pressure drop in the horizontal wellbore Delay at the end of the water or gas coning.