Optimization of Jet Pump Deliquification Technology for High Water Cut Tight Gas Reservoir in Qingshimao Field

To address the underperformance of jet pump deliquification in high water cut tight gas reservoirs of Qingshimao field， optimizing the jet pump deliquification technology of high water-cut tight gas reservoirs is imperative. In the paper， based on the overall production characteristics and well condition parameters of gas wells in the Qingshimao field， considering the technical characteristics of jet pump deliquification technology under the action of water and natural gas， combined with numerical analysis and test， the internal flow field of jet pump was analyzed. Then， taking Well Li⁃x as an example， the characteristics of two jet pump deliquification technologies were analyzed， and the jet pump deliquification technology for high water-cut tight gas reservoirs was optimized. The study results show that the liquid-gas alternating jet pump deliquification technology adopts short-cycle alternating operations. This approach incorporates the advantage of hydraulic jet pump deliquification technology such as strong liquid-carrying capacity， enabling rapid gas well restoration. Meanwhile， it combines the advantage of pneumatic jet pump deliquification technology such as unaffected by liquid column backpressure in the gas well production， allowing the restored well to transition directly to flow production. The liquid-gas alternating jet pump deliquification technology increases gas production by 20% compared to the hydraulic （water） jet pump deliquification technology， and increases liquid production by 116% and reduces composite cost by 32% compared to the pneumatic （natural gas） jet pump deliquification technology. The study results provide experimental basis and theoretical reference for the optimization of jet pump deliquification technology for high water-cut tight gas reservoirs.