预测低渗气田水平气井积液的新模型

A New Model to Predict Liquid Loading in the Horizontal Gas Well of Low Permeability Gas Reservoirs

水平井是低渗气藏提高单井产量的有效井型和开采方式,但相较于直井更容易受到积液的影响,建立适用于低渗气藏水平井的积液预测方法具有重要意义。以水平井斜井段为分析对象,从液膜运动出发,考虑井斜角的影响,建立了新的临界携液预测模型。结合实例计算,讨论了该模型的适用性。计算结果表明,该模型在生产中后期能较为准确地预测水平井是否发生积液,对低渗气田水平井的生产具有一定的指导意义。

Horizontal well can effectively improve the individual well production rate in low permeability gas reservoirs.But compared with vertical wells,horizontal wells are more likely to be affected by fluid loading.An accurate prediction of liquid loading in low permeability horizontal gas well is very important for production.Based on the lower curved section of horizontal wellbore,this study has established a new model to predict liquid loading starting from the liquid film movement in gas well with consideration of the influence of the well angle.The applicability of the model is discussed combined with the practical calculation.The calculation results show that this model can predict the liquid loading in horizontal wells accurately in the later period of production,which has a certain significance in the guidance of production.