Research on Application of Surge-type Gas-lift Induced Blowout and Drainage Technology to Resumption of Production of Shut-in Wells
Gas lift is a commonly used technological measure in the resumption of production of shut-in wells with wellbore liquid accumulation.Conventional gas lift is affected by many factors,such as injected gas pressure,formation pressure of shut-in wells,water cut and wellbore fluid accumulation,resulting in a low overall gas lift success rate.In view of the above problems,based on the analysis of the gas-liquid flow state of the wellbore during the gas lift process,this paper proposes that by repeatedly increasing and decreasing the production pressure difference,the gas-liquid two-phase will generate a gas-liquid mixed fluid column during the lift process.The gas-liquid mixed fluid column produced is lifted in stages to realize the resumption of production of shut-in wells.Field application shows that the surge-type gas-lift induced blowout and drainage technology can effectively improve the gas lift efficiency,and it is simple in operation,has a wide range of applications,and has a good effect on resumption of production.
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