天然气与石油2017，Vol.35Issue(3)：85-91,7.DOI:10.3969/j.issn.1006-5539.2017.03.016
水平井分段多簇压裂各射孔簇破裂压力分析
Analysis on Breakdown Pressure of Perforation Clusters in Horizontal Well Staged Multi-Cluster Fracturing
摘要
Abstract
In order to enhance the breakdown efficiency of perforation clusters in the process of staged multi-cluster fracturing in horizontal wells, a breakdown pressure calculation model of perforation clusters is established according to the induced stress of fracturing stage, the varying law of breakdown pressure of perforation cluster is analyzed based on the formation characteristics of multi-fracture synchronous extension in view of the stress resistance and effective net pressure between fractures. The results show that stress resistance exists while multi-fracture is extending synchronously in the process of staged multi-cluster fracturing in horizontal wells, the induced stress generated by the effective net pressure in last fracture of ahead stages will add up to the stage which to be fractured;perforation cluster furthest from the last fracture position has the minimum breakdown pressure, the difference between breakdown pressure of perforation clusters will increase with the extension of time, it is the best time to break all the perforation clusters at the early time of fracturing. The pump rate should be increased immediately to increase the bottom hole pressure by using the throttling effect of perforation; Big difference of breakdown pressure can be caused by little stress changing, so the change of breakdown pressure of perforation clusters which caused by induced stress must be paid more attention in perforation parameters design and fracturing parameters optimization.关键词
分段多簇压裂/破裂压力/应力阻隔/诱导应力/有效净压力Key words
Staged multi-cluster fracturing/Breakdown pressure/Stress resistance/Induced stress/Effective net pressure引用本文复制引用
冯福平,雷扬,胡超洋,韩旭,黄芮..水平井分段多簇压裂各射孔簇破裂压力分析[J].天然气与石油,2017,35(3):85-91,7.基金项目
黑龙江省普通本科高等学校青年创新人才培养计划. (UNPYSCT-2016127) （UNPYSCT-2016127）
