摘要
针对Ø244.5 mm套管完井作业中突出的调整层间分隔和薄油层精细分层等技术难题,设计了集旁通过流筛管、生产滑套于一体的外层防砂管柱,以及将充填转换总成预置于锚定密封总成的压裂充填防砂服务管柱,使充填时减少1层中心管的下入,满足低摩阻、大排量充填防砂和细分层系的需要。通过对管柱关键工具的分析以及施工参数的模拟,研究结果表明该管柱可安全下入最大拉伸载荷50 kN;冲管长度500 m且正循环压裂充填施工排量为6.48 m^(3)/min时,最大压力58.3 MPa;反循环洗井施工排量为1.27 m^(3)/min时,最大压力17.45 MPa,满足现场施工要求。该技术在渤海油田A井实施1次5层充填防砂作业,现场应用结果表明,细分层系高效压裂充填防砂管柱性能稳定可靠,比常规充填防砂施工作业节约3 d工时,并且实现免下分采管柱进行分层调控生产,节约作业时间近1 d,具有一定的推广应用价值。
To solve the obvious technical difficulties in the well completion operation ofØ244.5 mm casing,such as the adjustment of interlayer isolation and the fine division of thin oil layer,this paper designed an outer sand control string which integrates bypass overflow screen and production sliding sleeve and preset the packing and conversion assembly into the fracturing and packing sand control service string with sealing assembly,so that the number of central pipes to run in the hole during the packing is reduced by one layer while the needs of low-friction and large-displacement packing sand control and fine layer division are satisfied.The analysis of key string tools and the simulation of construction parameters indicate that the maximum tensile load to ensure the safe running of this string is 50 kN.When the length of the wash pipe is 500 m and the construction displacement of positive-circulation fracturing and packing is 6.48 m^(3)/min,the maximum pressure is 58.3 MPa;when the construction displacement of reverse-circulation flushing is 1.27 m^(3)/min,the maximum pressure is 17.45 MPa,which satisfy the requirements of field construction.This technology is applied in Well A of Bohai Oilfield to perform one five-layer packing sand control operation.The field application results indicate that the efficient fracturing and packing sand control string for fine layer division has stable and reliable performance and its operation time is 3 d shorter than that of conventional packing sand control operation.What’s more,it can realize separate-layer production control without running separate-layer production string in the hole,so as to save the operation time by about 1 d.Obviously,it has a certain value of popularization and application.
作者
左凯
张斌
徐刚
包陈义
张启龙
刘晓龙
ZUO Kai;ZHANG Bin;XU Gang;BAO Chenyi;ZHANG Qilong;LIU Xiaolong(CNOOC EnerTech-Drilling&Production Co.,Tianjin 300452,China;China University of Petroleum(Beijing),Beijing 102249,China;CNOOC China Limited Tianjin Company,Tianjin 300459,China)
出处
《石油钻采工艺》
CAS
北大核心
2021年第6期756-761,共6页
Oil Drilling & Production Technology
基金
“十三五”国家科技重大专项子任务“开发井防砂与细分层系配注一体化技术示范”(编号:2016ZX05058-002-011)
中国海洋石油集团有限公司科技项目“完井防砂系列工具研制(三期)”(编号:CNOOC–KJ135KJXMNFGJ2016–01)。
关键词
渤海油田
细分层系
压裂充填
服务工具
摩阻
Bohai Oilfield
fine layer division
fracturing and packing
service tool
friction
