密闭扩张式封隔器的研制及应用.pdf

石油机械
2012年第40卷第3期
CHINA PETROLEUM MACHINERY
油气田开发工程
密闭扩张式封隔器的研制及应用
王宏万马艳洁刘晋伟孙宝孙金锋郝恒泽2郝加鹏
(1.胜利油田分公司米油工艺研究院2.胜利油田分公司东辛采油厂
摘要:针对扩张式封隔器在应用中存在压力波动及停注时自动解封,易造成各层之间窜通的问
题,研制了K344(1)-112密闭扩张式封隔器。该封隔器在注水压力波动及关井停注时依然保持
密封状态,解决了层间窜通问题。设计了2种解封方法:一是反洗井解封法,二是上提管柱解封
法,方便实用。注水时封隔件轴向压缩,有效缓解胶筒端部应力集中,提高密封效果,延长封隔
器使用寿命。该封隔器在胜利油田的53口分层注水井中进行试验应用,施工成功率100%。封隔
器封隔可靠,可防止层间窜通。2种解封方式解封可靠,能满足反洗井和起管柱作业的要求。
关键词:密闲扩张式封隔器;层间窜通;解封;洗井
中图分类号:TE934文献标识码:A文章编号:1001-4578(2012)03-0091-03
The Development and Application of the K344(1) -112
Airtight Expansion Packer
Wang Hongwan Ma Yanjie Liu Jinwei Sun Bao Sun Jinfeng Hao Hengze'hao Jiapeng
(1 Reserch stite of Produ Teh og of engli i field mn Dong n Prodction Plant sheng i i-
field Company)
Abstract: As far as the expansion packer is concerned, there exist pressure fluctuation and automatic unsetting
during the injection suspension, which will cause interlayer channeling. Considering this problem, the K344(1)
112 airtight expansion packer was developed. The packer is kept in sealing state in pressure fluctuation of water
injection and shut-in injection suspension, so the problem of interlayer channeling has been solved. Two unsetting
methods were designed. One method is reverse well flushing unsetting method; the other is string-lift unsetting
method. The packer is subject to axial compression in water injection, thus stress concentration on the packer rul
ber end is effectively relieved and the service life of the packer is lengthened. The packer was applied to 53 sepa-
rate -layer injection wells in Shengli Oilfield in the experiment with a 100% success rate of operation. The packing of
the packer is reliable and interlayer channeling can be prevented. The two unsetting methods are reliable in unset
ting and they can satisfy the requirement of backwashing and string tripping
Key words: sealing expansion packer; interlayer channeling; unsetting; well flushing
于其一般设计有洗井通道,在应用中易出现地层出
砂砂埋封隔器洗井通道,致使无法正常洗井。所以
目前对于此类油藏通常采用扩张式封隔器完井。但
随着疏松砂岩油藏投入注水开发,出砂问题成常规的扩张式封隔器在应用中存在压力波动及停注
为制约此类油藏开发效果的重要因素。目前出砂油时自动解封,易造成各层之间窜通的问题,另外扩
疲在进行分层注水时,如果采用胚缩式封隔器,由张式封隔器在坐封时胶筒端部应力集中也会编短封
*密闭扩张式封隔器已获国家实用新型专利,专利号:ZL200520125290.9。