TCP小直径封隔器封井工艺技术  

Well sealing technology of TCP pony packer

作　　者：姚磊 陈丽君 YAO Lei;CHEN Lijun(Well Testing&Perforating Service Branch of Daqing Oilfield Co.,Ltd.,Daqing,Heilongjiang 163412,China;Water Service Company of Daqing Oilfield Co.,Ltd.,Daqing,Heilongjiang 163000,China)

机构地区：[1]中国石油大庆油田有限责任公司试油试采分公司,黑龙江大庆163412 [2]中国石油大庆油田有限责任公司水务公司,黑龙江大庆163000

出　　处：《油气井测试》2023年第1期22-26,共5页Well Testing

基　　金：中国石油大庆油田有限责任公司试油试采分公司科研推广项目“作业施工无污染技术推广”(201703-202012)。

摘　　要：大庆油田部分区域地层压力系数较高,起射孔管柱过程中存在溢流、井涌,处理不及时极易发生井喷风险,为降低施工现场的井控风险,研制出一种小直径封井封隔器。该封隔器随射孔管柱下入井内,采用双向卡瓦方式锚定,射孔后封隔射孔井段及以下套管,上提管柱坐封实现丢手,下专用打捞工具下压解封,起射孔管柱时无需压井,避免井内流体外溢,有效避免射孔后弹片堵塞解封通道和砂卡。通过室内试验和X4井、X5-11井现场应用,结果表明,该封隔器坐封后封井效果良好,坐封机构稳定可靠,可以有效地对油层进行封堵,封堵期间套管无溢流发生,既减少了射孔时压井液对地层的污染,又降低了溢流对地面造成的环保隐患,解封时解封机构稳定可靠。该工艺能够满足油田高压区块射孔作业减少对地层污染的施工要求,具有良好的推广应用前景。With the exploration and development process of Daqing Oilfield,at the high pressure tract,after tubing transportation perforation,overflow,kick and even blowout maybe bring at well head.In order to solve this problem,development of a pony packer,anchorage by bi-directional slip,setting by lifting the string,unset by bell socket.Pony packer is driven into the well with the perforating string,sealed top of perforation interval after perforation,without kill after perforation,avoid well fluid overflow,effectively prevent the fragments from blocking the unsealing channel and sand sticking after perforation.It is proved by experiment,X4 well and X5 well that pony packer has good application,meet the requirements of perforation operation in Daqing Oilfield,effectively solves the problem that difficult of lifting the perforating string in high pressure well,reduce the use of completion fluid and formation pollution,improve construction efficiency and realize green construction,has a good application prospect.

关 键 词：TCP 小直径封隔器 高压井 封井技术 射孔管柱 坐封机构 锁紧机构 解封机构 

分 类 号：TE353[石油与天然气工程—油气田开发工程]