Diagnosis of Liquid Accumulation in Gas Wells and Application of Gas Lift Discharge and Gas Production Technology
In the development process of water-producing gas fields,the phenomenon of gas well water production inevitably occurs.When the gas well output is higher than the critical liquid-carrying flow,there will be no liquid accumulation at the bottom of the well.When the gas well output is lower than the critical liquid-carrying flow,the bottom of the well will produce fluid accumulation.Gas lift is a common means of daily discharge of liquid accumulation at the bottom of the well,which plays an important and positive role in the development process of gas field.The diagnosis of fluid accumulation is the basis for grasping the timing of fluid accumulation in gas wells,judging the degree of fluid accumulation,and selecting gas lift wells.In this study,by calculating the reasonable oil jacket pressure difference in the gas well production process,the reasonable production jacket pressure differential plate under different pressures,different gas production and liquid production is drawn.According to the comparison between the actual production pressure difference of the gas well and the reasonable oil jacket pressure difference,it can accurately judge whether there is liquid accumulation at the bottom of the well,eliminate the liquid accumulation at the bottom of the well through gas lift,and then restore the production capacity of the gas well.
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