水平井延时启动趾端滑套关键技术研究
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摘要
国内外的非常规油气储层开发大都采用泵送桥塞分段压裂技术,但在首段压裂时,需采用连续油管进行射孔作业,以建立井筒和地层的流通通道,增加了作业周期和成本。针对这一问题,开发了一种延时启动趾端滑套,文章概述了工具的结构原理和施工流程,总结出延时启动控制技术和启动压力精准控制技术两项关键技术,并通过对工具结构和工艺上的优化,提出了提高工具入井安全可靠性的方法。延时启动趾端滑套在国内页岩气井进行了应用,有效替代了第一段的射孔作业,实现了页岩气等非常规油气藏开发的降本增效。
Stage fracturing with bridge plug is a common method to develop unconventional reservoirs at home and abroad. In order to establish the communication channel between the wellbore and the formation,perforation operation shallbe carried out by coiled tubing in the first stage of fracturing,which increases operation time and cost. To solve this problem,a timedelay toe sleeve was developed,its principle and operation are summarized in this paper. The key issues of time-delay control and precision control of activating pressure are summed up. The method of improving safety and reliability of the tool is presented by optimizing the tool structure and operation procedures. The time-delay toe sleeve has been applied in the shale gas wells,which has effectively substituted the perforation operation in the first stage fracturing and achieved the goal of reducing cost and increasing efficiency during unconventional resource development.
Stage fracturing with bridge plug is a common method to develop unconventional reservoirs at home and abroad. In order to establish the communication channel between the wellbore and the formation,perforation operation shallbe carried out by coiled tubing in the first stage of fracturing,which increases operation time and cost. To solve this problem,a timedelay toe sleeve was developed,its principle and operation are summarized in this paper. The key issues of time-delay control and precision control of activating pressure are summed up. The method of improving safety and reliability of the tool is presented by optimizing the tool structure and operation procedures. The time-delay toe sleeve has been applied in the shale gas wells,which has effectively substituted the perforation operation in the first stage fracturing and achieved the goal of reducing cost and increasing efficiency during unconventional resource development.
引文
[1]何红梅,黄禹忠,任山,等.致密气藏水平井多级多段压裂新技术及应用[J].钻采工艺,2012,35(4):62-65.
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[3]赵铭,王伟佳,刘洪彬,等.国外页岩气井连续油管固井滑套压裂完井方式研究[J].钻采工艺,2017,40(2):59-62.
[4]莫里斯·杜索尔特,约翰·麦克力兰,蒋恕.大规模多级水力压裂技术在页岩油气藏开发中的应用[J].石油钻探技术,2011,39(3):6-16.
[5]张骏,宋杰.多级分簇射孔分段桥塞联作工艺技术与异常事件处理方法[J].钻采工艺,2016,36(4):57-59,69.
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[8] Trebing C,et al. Cost effective solutions to achieve injection post toe valve failure[J]. SPE 173678,2015.
[9]徐玉龙.水平井裸眼分段压裂套压阀研制与应用[J].石油矿场机械,2014,43(11):90-92.
[10]戴文潮,秦金立,薛占峰,等.一球多簇分段压裂滑套工具技术研究[J].石油钻探技术,2014,42(8):103-106.
[11]何明格,帅春岗.套管趾端启动滑套研制及现场应用[C].全国天然气藏高效开发技术研讨会,2015.
[2]王继良,伊伟锴.可逐级解封的管内分段压裂管柱设计[J].石油机械,2017,45(5):107-110.
[3]赵铭,王伟佳,刘洪彬,等.国外页岩气井连续油管固井滑套压裂完井方式研究[J].钻采工艺,2017,40(2):59-62.
[4]莫里斯·杜索尔特,约翰·麦克力兰,蒋恕.大规模多级水力压裂技术在页岩油气藏开发中的应用[J].石油钻探技术,2011,39(3):6-16.
[5]张骏,宋杰.多级分簇射孔分段桥塞联作工艺技术与异常事件处理方法[J].钻采工艺,2016,36(4):57-59,69.
[6] Wellhoefer B,et. al. New toe sleeve enable true casingpressure test in an eagle ford shale well:a case study[J].SPE 176876,2015.
[7] Chauffe S,Pence N,Harris M. Frac sleeve designer for multi-zone cemented laterals[J]. SPE 174075,2015.
[8] Trebing C,et al. Cost effective solutions to achieve injection post toe valve failure[J]. SPE 173678,2015.
[9]徐玉龙.水平井裸眼分段压裂套压阀研制与应用[J].石油矿场机械,2014,43(11):90-92.
[10]戴文潮,秦金立,薛占峰,等.一球多簇分段压裂滑套工具技术研究[J].石油钻探技术,2014,42(8):103-106.
[11]何明格,帅春岗.套管趾端启动滑套研制及现场应用[C].全国天然气藏高效开发技术研讨会,2015.