摘要
目前页岩气开采规模日渐扩大,由于页岩储层岩性致密、非均质性强、缝网系统复杂、断层遮挡众多,压裂施工中套变等井下事故频发,常规压裂工艺面临重大挑战。在井筒变形、工具入井困难的情况下,常规的分段压裂改造技术无法实施,应用暂堵分段和暂堵转向压裂技术,通过不同粒径暂堵剂的组合使用,实现堵塞井筒炮眼,在近井缝口或远场缝端产生致密的暂堵剂封堵带,迫使流体转向,产生新裂缝或分支缝,同时增加裂缝复杂程度,提高储层动用程度。
At present,the scale of shale gas recovery is expanding day by day.Due to tight lithology,strong heterogeneity,complex fracture network system,and many faults in shale reservoirs,downhole accidents frequently happen,such as casing changes during fracturing construction and so on,the conventional fracturing process faces major challenges.When the wellbore is deformed and the tool is difficult to enter the well,the conventional staged fracturing technology cannot be implemented.The application of temporary block segmentation and temporary blockage steering fracturing technology can block the wellbore blasthole,and produce a dense temporary plugging agent sealing band at the near well or the far field seam end,forcing the fluid to turn,creating new cracks or branch joints to simultaneously increase the complexity of cracks and increase the degree of reservoir utilization through the combination of different particle size temporary blocking agents.
作者
葛婧楠
李然
舒东楚
李涛
张科
潘丹丹
GE Jing-nan;LI Ran;SHU Dong-chu;LI Tao;ZHANG Ke;PAN Dan-dan(PetroChina Zhejiang Oilfield Company,Luzhou 646400,China;PetroChina Liaohe Oilfield Company,Panjin 124000,China)
出处
《当代化工》
CAS
2020年第9期2028-2032,共5页
Contemporary Chemical Industry
基金
国家科技重大专项,昭通页岩气勘探开发示范工程(项目编号:2017ZX05063)
关键词
暂堵分段
暂堵转向
效果分析
Temporary blocking segment
Temporary blocking steering
Effectiveness analysis
