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气井井筒积液过程是多相流过程,井筒中流体产生回压(通常重力压强起主导作用),该回压会限制,特定条件下甚至会阻止储层中气的产出。工业上已认识到井筒积液的重要性,并积极采取措施避免这类问题,然而对多相流间相互过渡现象却认识不足。本文讨论多相流复杂性与气井井筒积液间关系。综合回顾预测井筒积液产生的流动模型方程,诊断井筒积液对气井产量的影响,并进行最优化筛选。回顾了储层和井筒动态交互作用的最新模拟试验,指出当前模型存在的缺陷,并提出多相流型转变方法的重要性。
The wellbore fluid accumulation process in gas wells is a multi-phase flow process in which fluid is back-pressured (usually by gravity pressure) which limits the gas production even under certain conditions. Industry has recognized the importance of wellbore effusion and has taken proactive steps to avoid such problems, however, there is a lack of understanding of the transitional phenomena between multiphase flows. This article discusses the relationship between multiphase flow complexity and gas well fluid. Comprehensively predicts the flow model equation of wellbore fluid production, diagnoses the influence of wellbore fluid on gas well production, and carries out the optimization screening. The latest simulation experiments of dynamic interaction between reservoir and wellbore are reviewed. The defects of current model are pointed out and the importance of multiphase flow transition method is proposed.