摘要
伴随着油田的进一步开采,井内的气液有效分离变得越来越重要。柱式气液旋流分离器由于结构简单和制作成本低而在油田很受欢迎。一个典型气液旋流分离器被用于数值模拟计算。基于混合物模型下的三维湍流模型被用来描述分离器内混合物流动情况。通过数值模拟,分析了不同参数下(分离器长度、出口直径等)的气液分离效率。随着分离器长度增加,气液分离效率降低;随着出口直径的增大,气液分离效率先提高后降低。矩形入口形状比圆形入口形状更适合旋流分离器,气液分离效率从66.45%提高到79.04%。最后,最佳几何结构被提出,在最佳结构下气液分离效率为86.15%。
Downhole gas-liquid separation becomes more and more important in further exploitation of oilfields. At present, a separator called column gas-liquid cylindrical cyclone is hugely popular in oil and gas industry due to its simple technical process and low manufacture cost. In this study, this typical separator was applied to numerical simulation; moreover, a 3D turbulence model based on another mixture model was also applied to describing mixture flowing within the separator. The gas-liquid separating efficiency under various parameters including length and outlet diameter of separator was obtained from this numerical simulation. With an increase of the length, the efficiency decreased. And along with an enlargement of outlet diameter, the efficiency at first increased and then fell. For inlet shape, the rectangle was more suitable than the round, and the efficiency increased from 66.45 % to 79.04 %.Finally, an optimum geometry was proposed for the separator; as a result, the gas-liquid separating efficiency reached 86.15 %.
出处
《天然气技术与经济》
2017年第4期26-29,50,共5页
Natural Gas Technology and Economy
关键词
柱式气液旋流分离器
混合物模型
分离效率
最佳几何结构
column gas-liquid cylindrical cyclone
mixture model
separation efficiency
optimum geometry
