【摘要】 自适应流入控制装置(AICD)控水完井技术目前主要应用于油藏控水,针对气藏的AICD控水完井技术研究尚为空白,为此,开展了适用于气藏控水的新型流道型AICD的控水机理与流动特性分析,建立了塔河油田底水气藏新型流道型AICD控水完井的储集层—井筒耦合动态模型。利用正交试验分析优化了新型流道型AICD的结构参数组合,开展了新型流道型AICD控水完井的控水效果分析。结果表明,与常规射孔完井相比,新型流道型AICD控水完井造成的井底压力损失很小,对凝析油产量影响也很小;新型流道型AICD控水完井可延长底水气藏低产水采气期约365 d,预测20年的累计产水量降低约27%,近井地带含水饱和度普遍降低,具有较好的控水效果。新型流道型AICD控水完井可应用于底水气藏开发,实现控水稳气。更多还原

【Abstract】 Autonomous Inflow Control Device(AICD) well completion technology has been applied in water control of oil reservoirs. However, the research on the application of AICD well completion technology in gas reservoirs is still lacking. Therefore, the water control mechanism and the flow characteristic of a new channel-type AICD well completion technology suitable for gas reservoirs are analyzed, and a dynamic reservoir-wellbore coupling model for the new channel-type AICD well completion technology is established for the gas reservoirs with bottom water in Tahe oilfield. The structure parameters of the new channel-type AICD well completion technology are optimized by using orthogonal tests and the water control effect of the new technology is analyzed. The results show that compared with the perforation completion, the new channel-type AICD well completion technology causes little bottom hole pressure loss and has little impact on condensate oil production, and the application of the new channel-type AICD well completion technology can prolong the low watercut gas production period by about 365 days. It is predicted that the cumulative water production with the new channel-type AICD well completion technology will decrease by about 27% at the end of the 20 th year and the water saturation in the near-wellbore area will decrease, too, indicating a good water control effect. The new channel-type AICD well completion technology can be used for the development of gas reservoirs with bottom water, and water control and steady gas production can be achieved in this kind of reservoirs.更多还原