全自溶分段压裂滑套的研制与应用
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摘要
针对常规水平井裸眼多级滑套压裂管柱不能实现压裂后管内全通径,后期储层二次改造、封堵底水、单段测试等作业受到限制等问题,开展了全自溶合金材料在分段压裂工具中的应用研究。通过球座结构优化和表面涂层强化,实现滑套入井后球座不溶解,压裂后迅速溶解的目的。经排量为6 m~3/min、压裂液砂比为30%、循环时间为32 h的冲蚀实验表明,球座仍具备承压70 MPa的能力。在杭锦旗气田的压裂井中开展了现场应用,成功实现了入井静置48 d后顺利开启,并满足了压裂施工过程中的大排量冲蚀要求,压裂后球及球座在地层环境下溶解,滑套内形成了全通径。全自溶分段压裂滑套的研制与应用为优化压裂工艺、提升施工效率提出了解决思路,具有重要的指导意义。
The internal full-diameter condition cannot be gained after the multi-stage fracturing with sliding sleeve in open-hole conventional horizontal well. The application of fully auto-soluble alloy materials in the multi-stage fracturing tool was carried out to improve this limitation for the secondary reservoir stimulation,bottom-aquifer plugging,individual-stage test,etc. The ball-seat structure optimization and surface coating strengthening keep the ball-seat insoluble after downhole installation and quickly soluble after fracturing operation. The ball-seat is still capable of bearing 70 MPa pressure after the laboratory erosion experiment with a displacement of 6m~3/min,a fluid-sand ratio of 30% and a cycle period of 32 h. This fully auto-soluble sliding sleeve was applied in Hangjinqi Gasfield,which realizes successful opening after downhole holding for 48 d,which meets the requirements of largedisplacement erosion during multi-stage fracturing operation. The ball and ball-seat are fully auto-soluble in the formation condition after fracturing operation,which ensures the internal full-diameter condition. The development and application of fully auto-soluble multi-stage fracturing sliding sleeve provide solutions and certain guidance for fracturing optimization and efficient operation.
The internal full-diameter condition cannot be gained after the multi-stage fracturing with sliding sleeve in open-hole conventional horizontal well. The application of fully auto-soluble alloy materials in the multi-stage fracturing tool was carried out to improve this limitation for the secondary reservoir stimulation,bottom-aquifer plugging,individual-stage test,etc. The ball-seat structure optimization and surface coating strengthening keep the ball-seat insoluble after downhole installation and quickly soluble after fracturing operation. The ball-seat is still capable of bearing 70 MPa pressure after the laboratory erosion experiment with a displacement of 6m~3/min,a fluid-sand ratio of 30% and a cycle period of 32 h. This fully auto-soluble sliding sleeve was applied in Hangjinqi Gasfield,which realizes successful opening after downhole holding for 48 d,which meets the requirements of largedisplacement erosion during multi-stage fracturing operation. The ball and ball-seat are fully auto-soluble in the formation condition after fracturing operation,which ensures the internal full-diameter condition. The development and application of fully auto-soluble multi-stage fracturing sliding sleeve provide solutions and certain guidance for fracturing optimization and efficient operation.
引文
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[2]裴晓含,魏松波,石白茹,等.投球滑套分段压裂用可降解压裂球[J].石油勘探与开发,2014,12(6):738-741.
[3]王建军,于志强.水平井裸眼选择性分段压裂完井技术及工具[J].石油机械,2011,39(2):64-65.
[4]魏辽,马兰荣,朱敏涛,等.大通径桥塞压裂用可溶解球研制及性能评价[J].石油钻探技术,2016,44(1):90-94.
[5]陈海力,邓素芬,王琳,等.免钻磨大通径桥塞技术在页岩气水平井分段改造中的应用[J].钻采工艺,2016,39(2):123-125.
[6]姚昌宇,王迁伟,高志军,等.连续油管带底封分段压裂技术在泾河油田的应用[J].石油钻采工艺,2014,36(1):94-96.
[7]严向阳,赵海燕,王腾飞,等.常规储层水平井分段压裂新技术及适用性分析[J].油气藏评价与开发,2016,6(2):69-73.
[8]董明键,郭先敏,李子良.可降解材料在完井工具中的应用及发展趋势[J].石油机械,2015,43(3):31-34.
[9]魏辽,刘建立,朱敏涛,等.多级滑套可溶解憋压球材料研究[J].石油机械,2015,43(11):102-106.
[10]魏辽,肖代红,朱敏涛,等.高强快速分解Mg-x Al合金的组织与性能[J].材料热处理学报,2015,36(3):101-104.
[11]杨军,王建树,尹俊禄,等.压裂分隔工具用可溶合金的组织与性能[J].机械工程材料,2017,41(9):32-35.
[12]杨军,尹俊禄,张文,等.压裂分隔工具用可溶镁合金Mg-7Al-1Zn-1Ni-1Cu的制备与性能[J].有色金属工程,2018,8(3):47-50.
[13]郭皓.井下暂堵工具用可溶镁合金研究[D].西安:长安大学,2017.
[14]温燕宁,肖来荣,张喜民,等.Cu-Zn-Al-Ni合金的组织与性能[J].中南大学学报(自然科学版),2011,42(4):922-927.
[15]姜倩,刘恩洋,赵严,等.可溶性镁合金的制备及其性能[J].工程科学学报,2018,40(2):192-199.
[16]张怀博.可溶镁合金力学性能及溶解性能实验研究[D].大连:大连海事大学,2017.
[17]庄园.新型高性能镁合金的制备与组织性能研究[D].哈尔滨:哈尔滨理工大学,2013.
[18]任国富,赵粉霞,冯长青,等.套管球座压裂工具研制与实验[J].钻采工艺,2017,40(5):76-77.
[19]尚晓峰,樊金喆,尚进.镁合金滑套压裂球的表面改性研究[J].机械工程师,2015,47(3):169-171.
[20]左争云,裴晓含,魏松波,等.投球滑套压裂球承压性能分析及试验研究[J].石油机械,2014,42(7):82-85.