摘要
水平井裸眼完井分段压裂技术是现阶段提高低渗透油藏产能的主要技术，其技术难点在于分段压裂工具的密封可靠性，其中投球滑套的密封性能在很大程度上直接决定分段压裂的成败，导致投球滑套密封失效的主要原因则是流体携砂冲蚀。依据投球滑套球座的实际工况，在常规单锥度球座的基础上提出双锥度球座，并借助Fluent流体软件实现对双锥度球座的结构优化，优化后的球座二锥度应介于70°～80°之间。双锥度球座解决了由于球座冲蚀磨损造成的投球滑套密封失效问题，保证了水平井裸眼完井分段压裂的可靠性。
Staged fracturing of open hole completion for horizontal wells is a key technology to improve pro- duction capacity of low-permeability reservoirs. Its technical difficulty is sealing reliability of staged fracturing tools. Staged fracturing effect directly depends on sealing property of the ball-activated sliding sleeve and sand-bear- ing fluid erosion is primary cause for failure of ball-activated sliding sleeve failure. A biconical seat is put forward on the basis of conventional single taper seat based on actual working conditions of the ball-activated sliding sleeve and structure optimization of the biconical seat is achieved by using Fluent fluid software. Biconical degree of the opti- mized ball seat shall be 70° to 80 °. The biconical seat can solve failure of ball-activated sliding sleeve sealing airing from erosive wear to ensure staged fracturing reliabiXity of open hole completion for horizontal wells.
出处
《石油机械》
2015年第9期117-120,共4页
China Petroleum Machinery
关键词
水平井
分段压裂
投球滑套
双锥度
球座
冲蚀磨损
horizontal well
staged fracturing
ball-activated sliding sleeve
biconical
ball seat
erosion wear
