摘要
为了减少页岩气水平井完井压裂过程中使用连续油管进行第一级射孔的工作量,避免该项作业所带来的各种风险,解决长水平段、上倾井、深井、套变井等水平井首段射孔连续油管及后续作业工具无法下至井底的问题,采用流体隔离屏蔽爆破技术,成功研制出DRCFT型固井趾端压裂滑套,并在昭通国家级页岩气示范区进行了现场推广应用。室内实验结果表明,该固井趾端压裂滑套具有良好的密封性能,并且在井下环境被水泥浆凝固条件下仍可正常开启,开启压力精准,能够满足固井及压裂施工要求。该固井趾端压裂滑套现场应用于30余口井,成功率达100%,表明所研制的固井趾端压裂滑套性能可靠。结论认为,DRCFT型固井趾端压裂滑套解决了长水平井射孔枪、连续油管等后期作业工具无法下至井底的问题,可以有效替代水平井首段连续油管传输射孔作业;该工具降低了页岩气等非常规油气水平井压裂作业成本,为低渗透气、致密气、页岩气等非常规气藏的有效开发、降本增效提供了技术保障。
In order to reduce the workload of using coiled tubing for the first stage perforation in the completion and fracturing process of shale gas horizontal wells,avoid various risks brought by this operation,and solve the problem that the coiled tubing and subsequent operation tools for the first stage perforation of horizontal wells such as long horizontal section,upward inclined well,deep well and casing change well cannot go down to the bottom of the well,the fluid isolation shielding blasting technology is adopted in this paper DRCFT type cementing toe fracturing sleeve was developed and applied in Zhaotong national shale gas demonstration area.The laboratory test results show that the cementing toe fracturing sleeve has good sealing performance,which can be normally opened even when the downhole environment is solidified by cement slurry,and the opening pressure is accurate,which can meet the requirements of cementing and fracturing.It has been used in more than 30 wells with a success rate of 100%,which shows that the developed fracturing sleeve is reliable.It is concluded that DRCFT toe fracturing sleeve solves the problem that perforating gun,coiled tubing and other late operation tools in long horizontal wells cannot go down to the bottom of the well,and can effectively replace the first section of coiled tubing transmission perforating operation in horizontal wells;The tool reduces the fracturing cost of unconventional oil and gas horizontal wells such as shale gas,and provides technical support for the effective development,cost reduction and efficiency increase of unconventional oil and gas reservoirs such as low permeability,tight gas and shale gas.
作者
刘斌辉
唐守勇
曲从锋
张永强
李涛
张怀文
LIU Binhui;TANG Shouyong;QU Congfeng;ZHANG Yongqiang;LI Tao;ZHANG Huaiwen(CNPC Engineering Technology R&D Company Limited,Beijing 102206,China;PetroChina Zhejiang Oilfield Company,Hangzhou,Zhejiang 310023,China)
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2021年第S01期192-196,共5页
Natural Gas Industry
基金
国家科技重大专项“昭通页岩气勘探开发示范工程”(编号:2017ZX05063)
中国石油天然气集团有限公司重大现场试验项目“深层页岩气有效开采关键技术攻关与试验”(编号:2019F-31)
中国石油天然气集团有限公司科学研究与技术开发项目“自动化与高效钻完井新装备新工具研制”(编号:2019B-4011)
关键词
页岩气
非常规油气
固井
射孔
趾端压裂滑套
开启
昭通国家级页岩气示范区
Shale gas
Unconventional oil and gas
Cementing
Perforation
Toe fracturing sliding sleeve
Opening
Zhaotong National Shale Gas Demonstration Area
作者简介
刘斌辉,1987年生,工程师,主要从事固井工具及装备方面的研发工作。地址:(102206)北京市昌平区黄河街5号院1号楼。E-mail:liubhdr@cnpc.com.cn
