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多年来,井筒积液一直被认为是影响气井生产的一个很严重的问题。准确预测积液的形成,对于能否有效地采用合理的方法解决问题起关键作用。尽管有很多方法来预测井筒积液,但是预测的结果都不够准确,不能适应生产要求;而且由于井筒中多为多相流动状态,因此这些方法很难进行预测。这就要求产生一个计算准确且易于使用的方法。针对含有四相(气体、油、水、固体颗粒)流动介质的雾状流流动模型,并由此与最低动能理论导出一个预测气体临界流速的闭合解析公式。这个公式简单实用,计算结果准确。
Over the years, wellbore fluids have long been considered a serious problem affecting gas well production. Accurately predict the formation of fluid, for the effective use of a reasonable method to solve the problem play a key role. Although there are many ways to predict wellbore effluent, the predicted results are not accurate enough to meet the production requirements and these methods are difficult to predict due to the multiphase flow conditions in the wellbore. This requires a computationally accurate and easy-to-use method. Aiming at the flow model of a haze containing four phases (gas, oil, water and solid particles), a closed analytical formula of the critical velocity of the gas is deduced from the theory of lowest kinetic energy. This formula is simple and practical, the calculation result is accurate.