水平井变质量管内流动损失的数值研究(二):多支管流动

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。

THE NUMERICAL STUDY OF FLOW LOSS FOR VARIABLE MASS FLOW IN THE HORIZONTAL WELL (PART TWO),FLOW IN MULTICAN HOLE

This paper (part two) is a sequel of the numerical study about the pressure drop of variable mass flow in the horizontal well (part one), and investigates the pressure drop and friction of flow in the horizontal well with multibarrel injection. The pressure drop and wall friction along the well has great influence for the oil output. Therefore it is very important for optimizing the length of horizontal well, designing the technology and forecasting the oil output, if we understand the pressure drop law in the horizontal segment. This paper studies the influence of multibarrel injection on the flow properties by the numerical method and provides the variation law of friction and pressure drop coefficients of the flow with different Reynolds numbers and injected flux in pipe when fluid is injected at the pipe wall.