临兴区块致密气井动态携液规律研究

以提前预警致密气井筒积液、及时介入排采措施为目的,针对临兴区块致密气中后期生产面临的低压、低产临界产气等排采问题,运用气液两相流动室内模拟评价方法,开展气液两项流携液状态分析并辅以数值模拟手段,建立1套适用于临兴区块致密气井筒积液综合临界携液模型.结果表明:①在相同管径、压力、温度等条件下,斜井段易造成气液严重紊流,流...

Study on dynamic liquid carrying law of tight gas wells in Linxing block

Aiming at the problems of low pressure and critical gas production in Linxing block during the middle and later stage of tight gas production,the comprehensive critical liquid carrying model of wellbore liquid loading is established by using the indoor simulation evaluation method and numerical simulation.The results show that:①Under the same pipe diameter,pressure,temperature and other conditions,the inclined well section is easy to cause serious gas liquid turbulence.When the fluid impinges on the wall of the tube and the interaction between the fluid and the pipe,the extra energy is lost and the liquid drops down obviously;②In the process of gas and water flow,with the gradual decrease of gas flow rate,the pressure gradient in the middle and inclined sections of horizontal wells accounts for the largest proportion,which indicates that the inclined section is prone to liquid accumulation,especially when the inclination angle is 50°to reach the maximum liquid carrying gas velocity.③Belfroid’s prediction of critical liquid carrying model with well deviation is in accordance with the experimental law.The comprehensive critical liquid carrying model is established by modifying the key coefficient.The error is less than 15%,and it is well used between 10°and 90°.The above results have a certain guiding significance for the prediction of fluid accumulation in tight gas wells and the timing of subsequent drainage and production intervention.