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采用势叠加和镜像原理对底水油藏水平井入流形态进行研究,考虑摩擦压降、加速度压降以及混合压降等因素,并结合油藏渗流与井筒压降协调条件,建立了底水油藏-水平井筒耦合模型,计算了底水油藏水平井压力和流量分布。实例计算结果表明,沿井筒长度方向流量呈“U”型分布,压力从趾端41.449MPa到跟端41.351MPa逐渐变小,趾端变化较小,跟端变化较大,该模型对优化底水油藏水平井设计具有一定的参考价值。
Based on the principle of potential superposition and mirroring, the inflow patterns of horizontal wells in the bottom water reservoir are studied. Factors such as friction pressure drop, acceleration pressure drop and mixed pressure drop are considered. Combined with the reservoir flow and wellbore pressure drop coordination conditions, Reservoir-horizontal wellbore coupling model, the horizontal well pressure and flow distribution in the bottom water reservoir are calculated. The calculated results show that the flow distribution along the length of the wellbore is “U” type. The pressure decreases gradually from 41.449MPa to 41.351MPa at the toe end, with little change at the toe end and large changes at the heel end. Bottom water reservoir horizontal well design has certain reference value.