可提出式插管封隔器关键技术及现场应用
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摘要
插管封隔器是水平井多级滑套裸眼封隔器压裂工艺的核心工具。针对多级滑套压裂施工过程中插管封隔器存在的提前坐挂、下入遇阻等问题,分析了可提出式插管封隔器工具的工作原理及关键技术,阐述了送入和坐封工具的结构组成,采用整体式合金卡瓦避免入井过程中卡瓦损坏导致的提前坐挂现象和保证卡瓦的双向锚定性能,创新地提出了机械和液压双作用丢手工具和解挂工具,提高其承载能力和回收性能。数值模拟和地面实验表明,可提出式插管封隔器承载能力大于600 k N,封隔压差70 MPa,并顺利解挂,各项功能均满足设计要求。在现场×6井应用中,由于异常井况,工具发生提前坐挂,下入解挂工具后顺利实现封隔器解挂和管串提出。
Packer-hanger is the key tool in horizontal multi-stage open-hole fracturing technology. Based on the on-site construction process and accidents, which occurred using the conventional packer-hangers in Huabei company, the key technologies and working principles of the retrievable packer-hanger were analyzed. The packer unit uses steel-made integrated slip to avoid premature setting because of the damage of the slip in running the string in the hole, and makes the bi-direction anchoring effective. The structure and the matching tool can make the packer-hanger retrievable after settled in place. Release unit has both hydraulic and mechanical functions. Numerical simulation and ground test show that the packer can bear the pressure of 70 MPa and load of 600 k N. In the application to the X6 Well, the packer-hanger was settled prematurely because of the fishes. The strings were retrieved successfully after running the matching tool to release the packer-hanger.
Packer-hanger is the key tool in horizontal multi-stage open-hole fracturing technology. Based on the on-site construction process and accidents, which occurred using the conventional packer-hangers in Huabei company, the key technologies and working principles of the retrievable packer-hanger were analyzed. The packer unit uses steel-made integrated slip to avoid premature setting because of the damage of the slip in running the string in the hole, and makes the bi-direction anchoring effective. The structure and the matching tool can make the packer-hanger retrievable after settled in place. Release unit has both hydraulic and mechanical functions. Numerical simulation and ground test show that the packer can bear the pressure of 70 MPa and load of 600 k N. In the application to the X6 Well, the packer-hanger was settled prematurely because of the fishes. The strings were retrieved successfully after running the matching tool to release the packer-hanger.
引文
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[21]王建军,于志强.水平井裸眼选择性分段压裂完井技术及工具[J].石油机械,2012,40(5):82-85.
[22]马金良,潘娟芳,王林,等.自封压缩式封隔器的研制与应用[J].石油钻探技术,2015,43(6):120-124.
[2]张进.插管封隔器与多功能完井生产管柱[J].石油机械,2005,33(1):54-56.
[3]董兴国,刘磊,周歆,等.插管式永久封隔器的原理与应用[J].石油机械,2009,37(5):75-76.
[4]卢齐,林轶斌,赵益秋,等.永久式封隔器完井技术在龙王庙气藏开发井中的应用[J].钻采工艺,2016,30(2):39-42.
[5]徐立民,范玉斌,田相贵,等.埕岛油田威德福永久封隔器打捞技术及探讨[J].科技传播,2010,2(10):47-48.
[6]刘智.永久封隔器的设计与分析[D].北京:中国石油大学(北京),2011.
[7]李月丽,何青,张永春,等.固井滑套分段压裂技术在大牛地气田的试验应用[J].钻采工艺,2016,39(3):64-66.
[8]陈作,何青,王宝峰,等.大牛地气田长水平段水平井分段压裂优化设计技术[J].石油钻探技术,2013,41(6):82-85.
[9]秦金立,陈作,杨同玉,等.鄂尔多斯盆地水平井多级滑套分段压裂技术[J].石油钻探技术,2015,43(1):7-12.
[10]朱和明,薛占峰,赵聪,等.分段压裂专用悬挂器关键技术研究与应用[J].石油机械,2013,41(5):79-84.
[11]姚展华,王玉忠,宗蕾,等.MHR封隔器分段压裂工艺技术在大港油田的应用[J].油气井测试,2013,22(5):58-60.
[12]冯一,李君宝,韩耀图,等.深井回收永久封隔器实例解析[J].东方企业文化,2012,(10):144-145,147.
[13]李川.永久式悬挂封隔器的改进与应用[J].江汉石油职工大学学报,2016,29(3):32-33,37.
[14]章桂庭,郭树彬,雷刚,等.深斜井永久式封隔器两种套铣[J].石油钻采工艺,2007,29(5):111-116.
[15]宋本岭,黄志刚,张伟,等.钻免捞筛管顶部固井工艺研究与现场试验[J].石油钻探技术,2016,44(4):72-76.
[16]陈永新,姜红保,沈雪明,等.平湖油气田大斜度深井套铣永久式封隔器工艺参数优化[J].中国海上油气,2006,18(4):262-263,275.
[17]刘化国,黄建生,陈兴泉,等.永久式封层完井系统研究及应用[J].石油机械,2006,34(10):65-67.
[18]沈磊,辜志宏.用于高温高压井的可取式封隔器设计问题[J].石油机械,2001,29(7):52-54.
[19]姚展华,白文彬,侯超,等.MHR封隔器分段压裂技术及在大港油田的应用[J].石油地质与工程,2013,27(1):82-84.
[20]王建全.新型内插管回接装置的研制与应用[J].石油机械,2015,43(7):42-46.
[21]王建军,于志强.水平井裸眼选择性分段压裂完井技术及工具[J].石油机械,2012,40(5):82-85.
[22]马金良,潘娟芳,王林,等.自封压缩式封隔器的研制与应用[J].石油钻探技术,2015,43(6):120-124.