正反双循环洗井式分注工艺管柱的研制
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摘要
针对聚驱转后续水驱油藏残留聚合物返吐严重,在分层注水中存在测调遇阻及洗井不通等问题,研制了正反双循环洗井式分层注水工艺管柱。该工艺管柱可以实现正反双循环以及大排量洗井,保证洗井彻底、干净;采用独立的液压控制系统,管柱在下井和停注过程中井筒处于密闭状态,有效防止了残留聚合物和地层砂的返吐,提高了测调成功率及层段合格率。在现场6井次的试验中,实施成功率100%,实施井测试结果均合格。
To address severe flow back residual polymer during water flooding after polymer flooding,operation difficult during measurement and regulation and well flushing,a direct and reverse circulation well flushing separate layer water injection tubing string is developed. The tubing string could allow direct and reverse circulation with large displacement to ensure a clean wellbore. The wellbore stays closed during run in hole and stop water injection,thus effectively preventing the flow back of residual polymer and formation sand and improving the success rate of the measurement and the formation layer qualification rate. Field tests have been conducted in 6 wells with the operation and testing success rate of 100%.
To address severe flow back residual polymer during water flooding after polymer flooding,operation difficult during measurement and regulation and well flushing,a direct and reverse circulation well flushing separate layer water injection tubing string is developed. The tubing string could allow direct and reverse circulation with large displacement to ensure a clean wellbore. The wellbore stays closed during run in hole and stop water injection,thus effectively preventing the flow back of residual polymer and formation sand and improving the success rate of the measurement and the formation layer qualification rate. Field tests have been conducted in 6 wells with the operation and testing success rate of 100%.
引文
[1]马宏伟,刘科伟,焦明远,等.聚合物驱后注水井防堵分注技术[J].石油钻采工艺,2009,31(3):46-48.
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[5]张宁.孤东二区注聚转水驱后主要调整技术[J].内江科技,2014(1):65-66.
[6]李常友,刘明慧,贾兆军,等.液控式分层注水工艺技术[J].石油机械,2008,36(9):102-104.
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[8]丁晓芳,张一羽,刘海涛,等.双管分层注水工艺技术的研究与应用[J].石油机械,2009,37(10):50-51.
[9]何云,孙鑫宁,罗文莉,等.液控型安全接头的研制和应用[J].石油矿场机械,2002,31(4):46-47.
[10]董文军,胡长城,刘清松,等.防聚合物返吐分层注水新技术[J].石油机械,2004,32(7):49-50.
[2]孟勇,宋汝强.孤岛油田中二中Ng3-5注聚扩大区后续水驱提高采收率技术研究[J].石油天然气学报,2011,33(6):336-338.
[3]陈华兴,高建崇,唐晓旭,等.绥中36-1油田注聚井注入压力高原因分析及增注措施[J].中国海上油气,2011,23(3):189-192.
[4]董文军,冯毅,单晶,等.注聚转后续分层注水井防聚合物返吐技术探讨[J].河南石油,2006,20(1):52-53.
[5]张宁.孤东二区注聚转水驱后主要调整技术[J].内江科技,2014(1):65-66.
[6]李常友,刘明慧,贾兆军,等.液控式分层注水工艺技术[J].石油机械,2008,36(9):102-104.
[7]贾庆升.液控式同心双管分层注水技术[J].石油机械,2009,37(5):59-60,64.
[8]丁晓芳,张一羽,刘海涛,等.双管分层注水工艺技术的研究与应用[J].石油机械,2009,37(10):50-51.
[9]何云,孙鑫宁,罗文莉,等.液控型安全接头的研制和应用[J].石油矿场机械,2002,31(4):46-47.
[10]董文军,胡长城,刘清松,等.防聚合物返吐分层注水新技术[J].石油机械,2004,32(7):49-50.