全自溶分段压裂滑套的研制与应用  

Development and Application of Fully Auto-Soluble Multi-Stage Fracturing Sliding Sleeve

作　　者：杨同玉[1] 魏辽[2,3] 李强 朱和明 吴晋霞[2,3] Yang Tongyu;Wei Liao;Li Qiang;Zhu Heming;Wu Jinxia(Sinopec North China Company, Zhengzhou, Henan 450006, China;Sinopec Research Institute of Petroleum Engineering, Beijing, 100101, China;State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100101, China;Shelfoil Petroleum Equipment&Services Co, Ltd., Dezliou, Shandong 253005)

机构地区：[1]中国石化华北油气分公司,河南郑州450006 [2]中国石化石油工程技术研究院,北京100101 [3]页岩油气富集机理与有效开发国家重点实验室,北京100101 [4]德州大陆架石油工程技术有限公司,山东德州253005

出　　处：《特种油气藏》2019年第3期153-157,共5页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项“常压页岩气高效压裂工艺优化及完井工具研制”(2016ZX05061-002-05);中国石化工程公司攻关项目“可溶式全通径滑套分段压裂工具研制与应用”(SG18-45K)

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 6 m3/min, a flu id-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 large- displacement 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.

关 键 词：可控溶解 全自溶滑套 全自溶合金材料 分段压裂 全通径 杭锦旗气田 

分 类 号：TE934[石油与天然气工程—石油机械设备]