Abstract:

Flow characteristics of both oil and water in a horizontal pipe are the basic information for the design of crude oil transportation and production profile logging.The flow characteristics are more complicated when oil or water carries sediment particles.In order to simulate the distribution of flow characteristic parameters of water- or oil-sediment mixture in a horizontal pipe, the governing equations and the boundary condition for the mixture phase of water- or oil-sediment were established by the mixture algebraic slip model (MASM) based on the Eulerian description method, and the numerical solution was obtained by the finite difference method and successive over relaxation (SOR).The simulation results indicated that the mainstream velocity moved downwards with increasing volume fraction of the particle phase and decreased with reducing pressure drop.The distributions of the volume fraction of the particle phase in the circular cross section were related to the mainstream velocity, and the volume fraction values increased downwards and sidewards with reducing mainstream velocity.Moreover the mainstream velocity of the oil-sediment mixture phase was larger than that of the water-sediment mixture phase.The mixture algebraic slip model could well simulate the flow characteristic parameters of the mixture phase with higher computing efficiency.

Key words:

水平圆管, 产液剖面, 固液两相, 混合代数滑移模型, 颗粒相体积分数

摘要： 水平井油水流动特性是设计产液剖面测井方法和建立解释模型的重要依据，当油水中携带沙颗粒时，其流动特性变得更为复杂。通过基于Eulerian描述方法的混合代数滑移模型（MASM），建立挟沙水或油混合相控制方程和边界条件，并且使用有限差分方法和逐次超松弛（SOR）迭代法建立数值解，以模拟水平井挟沙水或油混合相的各运动特性参数分布。模拟结果表明，主流速度分布随着颗粒相体积分数增大有向下偏移特点，并随着压降值降低而减小。水平井圆截面上颗粒相体积分数分布特征主要与主流速度有关，随着速度降低，体积分数分布值向下向两侧增大。此外，挟沙油混合相主流速度大于挟沙水混合相速度。混合代数滑移模型不仅能够很好地模拟混合相各运动特性参数分布特征，而且计算效率比较高。

关键词:

水平圆管, 产液剖面, 固液两相, 混合代数滑移模型, 颗粒相体积分数