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分析了油、气、不三相分离设备的流程设计中,由气液分离器到油水分离器的管段,由于气体栓塞管路而引起剧烈起塞,造成油水分离器分离作用失效的原因,以及在油气的远距离混输过程中,由于流体栓塞管路而引起剧烈起塞,可能造成管件损坏和下游分离器分离作用的失效。同时介绍了剧烈的判定准则,着重介绍了可用于判定准则,着重介绍了可用于判定油气混输管线中是发生剧烈起塞的Boe准则。 相似文献
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The maximum effective hole-diameter mathematical model describing the flow of slightly compressible fluid through a commingled reservoir was solved rigorously with consideration of wellbore storage and different skin factors. The exact solutions for wellbore pressure and the production rate obtained from layer j for a well production at a constant rate from a radial drainage area with infinite and constant pressure and no flow outer boundary condition were expressed in terms of ordinary Bessel functions. These solutions were computed numerically by the Crump‘‘s numerical inversion method and the behavior of systems was studied as a function of various reservoir parameters. The model was compared with the real wellbore radii model. The new model is numerically stable when the skin factor is positive and negative, but the real wellbore radii model is numerically stable only when the skin factor is positive. 相似文献
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本文对气、液两相分别应用一维形式的质量守恒方程和动量守恒方程。假设各流动物理量在水跃面上具有第一类间断点,推导出水平管弹状流中水跃压降的表达式。对以水和空气为流动介质,内径为25.8m,51,2mm和300mm的三种管道,在液相表观流速为1.11m/s,气相表观流速为2 ̄10m/s的范围内,计算出了水跃压降的大小随Lockhrt-Martinelli参数的变化关系,分析了水跃压降对水平管弹状流摩擦 相似文献
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Flow patterns upstream and downstream of a sudden-contraction cross-section in a vertical straight pipe were presented. By comparing with flow patterns in uniform cross-section vertical tubes, the effect of the sudden change in pipe diameter on flow patterns was analyzed. Flow pattern transition mechanisms were discussed and transition criteria for flow pattern transitions were deduced accordingly using the dimensional analysis. 相似文献
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遗传Marquardt神经网络识别油气水多相流流型研究 总被引:1,自引:1,他引:0
目前利用最优化算法中的Marquardt法改进BP神经网络正受到越来越多的人们的注意 ,但该方法的网络初始权值是随机选取。由于初始权值选取不当将对整个网络的性能产生严重影响 ,因此提出将遗传算法与Marquardt法结合 ,先利用遗传算法全局随机搜索寻优的特性来寻找网络最佳初始权值 ,再用Marquardt法使网络权系数稳定收敛 ,同时应用该方法对油气水多相流流型进行智能识别 ,结果表明该方法能有效学习模式样本 ,学习稳定 ,推广能力强 ,适合于在流型识别等神经网络为中小规模的场合下应用。 相似文献
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将时间序列的方法应用到结构裂纹的确定中,并且把残差法与时间序列结合起来确定结构裂纹的位置及大小。最后通过实验验证了该方法的有效性。 相似文献