摘要
基于有限元方法和内聚区模型,建立了三维流固全耦合段内多簇裂缝竞争扩展模型,研究了孔眼摩阻对多裂缝竞争扩展的影响规律。研究结果表明,优化单簇射孔数目,能够有效平衡段内簇间差异,实现各簇裂缝间均衡进液;吉木萨尔油页岩水平井段内6簇压裂,缝间距10 m时,孔眼摩阻设计为5.0 MPa;缝间距20 m时,孔眼摩阻设计为2.5 MPa。
A competitive propagation model of multi-cluster cracks in the three-dimensional fluid-solid full-coupling section is established based on the finite element method and the cohesive zone model,and the influence law of perforation friction on the competitive propagation of multiple cracks is studied.The result shows that optimizing the number of single cluster perforations can effectively balance the difference between clusters in the section and realize the balanced liquid injection among clusters of cracks.There are 6 clusters of fracturing cracks in the horizontal well section of Jimsar oil shale,the perforation friction is designed to be 5.0 MPa when the cluster spacing is 10 m;the perforation friction is designed to be 2.5 MPa when the cluster spacing is 20 m.
作者
吕雯静
孙正龙
刘博文
周航
周福建
王博
LYU Wenjing;SUN Zhenglong;LIU Bowen;ZHOU Hang;ZHOU Fujian;WANG Bo(Petroleum Institute,Karamay Campus of China University of Petroleum (Beijing),Karamay,Xinjiang 843000,China;Unconventional Oil & Gas Science and Technology Research Institute,China University of Petroleum (Beijing),Beijing102249,China;Development Company,PetroChina Xinjiang Oilfield Company,Karamay,Xinjiang 834000,China)
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2022年第3期49-57,共9页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
国家自然科学基金“缝内动态封堵规律与裂缝转向机理研究”(52104011)
“页岩油高效开发关键问题与发展战略研究”(52142402)
中国石油科技创新基金“动态封孔下多簇裂缝竞争扩展规律研究”(2020D-5007-0207)
中国石油大学(北京)克拉玛依校区科研启动基金“基于缝内暂堵的重复压裂侧向缝网形成机理研究”(XQZX20210001)。
关键词
孔眼摩阻
限流压裂
流固耦合
段内多簇
油页岩
perforation friction
limited entry fracturing
fluid-solid coupling
intra segment multi-cluster
oil shale
