为了解决电潜泵等排采工艺因自身的应用条件不能适应平桥南区块页岩气井不同的排采时期的问题,开展了页岩气排采工艺技术适应性分析及对策研究。通过对电潜泵、射流泵、气举排采工艺存在问题进行分析,依据平桥南区块页岩气井不同排采时期地层压力特征,设计了电潜泵—气举组合排采工艺管柱。复合排采工艺管柱由 ? 73 mm油管、气举阀、智能开关、电潜泵组成。在页岩气井生产前期,当地层供液能力充足时,采用电潜泵排液举升工艺管柱;在排采后期,当电潜泵的沉没度下降至100~200 m时,采用气举排采工艺。电潜泵—气举组合排采工艺管柱克服了电潜泵、射流泵、气举单一排采工艺的不足,一趟生产管柱适应页岩气井不同的排采时期,最终实现了页岩气排采井的连续性排采。

Due to the own application conditions of the electric submersible pump and other drainage and gas recovery technologies, they cannot adapt to different drainage and gas recovery periods of shale gas wells in the south block of Pingqiao. In order to solve these problems, the technical adaptability analysis and countermeasures of shale gas drainage and recovery technology were carried out. Based on the analysis of the problems of electric submersible pump, jet pump and gas lift drainage and recovery process, the composite drainage and recovery process string combined by electric submersible pump and gas lift is designed according to the formation pressure characteristics of different drainage and recovery periods of shale gas wells of the south block in Pingqiao. The composite drainage and recovery process string consiste of ? 73 mm oil pipe, gas lift valve, intelligent switch and electric submersible pump. In the early production stage of shale gas wells, when the formation liquid supply capacity is sufficient, the electric pump drainage lifting process string is adopted. In the later drainage and recovery stage, when the submergence of submersible pump decreases to 100~200 m, the gas lift drainage and recovery process is adopted. This composite string overcomes the deficiency of electric submersible pump, jet pump and gas lift single drainage and recovery process, making one production string adapts to different drainage and recovery periods of shale gas wells possible, and finally realizing the continuous drainage and recovery of shale gas drainage and recovery wells.