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本文是《水平井变质量管内流动损失的数值研究 (一 ) :单支孔流动》[1 ]的续文 ,研究多支管水平井筒中流动压降和摩阻。水平井筒中压降及壁面摩擦阻力的沿程变化对水平井的产量有很大影响 ,因此 ,掌握水平段的多支孔流动损失和压降规律 ,对优化水平井长度及开采工艺设计、准确预测水平井产油量至关重要。本文仍采用数值方法 ,在预测壁面单支管注入对管流压降及壁面摩擦阻力影响的基础上 ,研究了壁面多支管注入对管流压降及壁面摩擦阻力影响 ,给出压降系数与壁面注入速度及截面雷诺数的变化规律。
This paper is “a numerical study of flow loss in a horizontal well with variable mass flow (a): continuation of single-hole flow” [1], and studies flow pressure drop and frictional resistance in a multi-legged horizontal wellbore. The variation of pressure drop along the horizontal wellbore and the variation of the frictional resistance along the wall have a great influence on the production of the horizontal well. Therefore, to master the flow loss and pressure drop of the multi-wellbore in the horizontal section, the design of the optimized horizontal well length and mining technology is accurate Predicting horizontal well oil production is crucial. In this paper, numerical methods are still used to predict the pressure drop and the frictional resistance of the pipe wall on the basis of predicting the effect of single-pipe wall injection on the pressure drop and the frictional resistance of the pipe wall. The relationship between the pressure drop coefficient and the wall surface Injection rate and section Reynolds number changes.