南堡油田封隔式尾管回接工艺的应用与认识  

Application and understanding of packer-type liner tieback technology in Nanpu Oilfield

作　　者：王建全[1] 李建业[1] 

机构地区：[1]中国石化石油工程技术研究院德州大陆架石油工程技术有限公司,山东德州253005

出　　处：《石油钻采工艺》2015年第2期107-110,共4页Oil Drilling & Production Technology

摘　　要：针对南堡油田潜山油藏埋藏较深,储层温度高,且地层压力系数在0.99-1.01 之间,钻井液密度稍有波动就会发生溢流或井漏的特殊井况,提出了一种特殊封隔式尾管回接工艺,其回接装置选用带顶部封隔器的回接插头、盲板短节、旋流短节和浮箍,使用防退卡瓦在封隔器坐封的同时实现坐挂,防止固井过程由于水泥浆和钻井液密度差引起的套管回缩上移.该工艺采用先回接、坐封,再进行注水泥固井的施工流程,能够避免施工过程中井漏的发生.现场实践表明,封隔式尾管回接工艺管串结构合理、操作简便、回接装置密封可靠、耐高温,有针对性地解决了南堡油田溢漏同存井的尾管回接难题,现场应用效果良好.The burial depth of buried hills in Nanpu Oilfield is deep, the reservoir temperature is high, and the formation pressurecoefficients are between 0.99 and 1.01, so overflow or fluid loss may occur even there is a slight change in drilling fluid density. Forthis end, a special packer-type liner tie-back technology has been developed, whose tie-back device includes the tie-back plug withtop packer, blind sub, vortex sub and float collar; the liner is set when the packer is setting, using anti-back slips, which preventsupward movement of casing retraction caused by the difference between cement slurry and drilling fluid density during cementing. Thistechnology procedure is tieback, setting, and cementing, which can effectively prevent lost circulation. Field practice shows that this pipestring used in this packer-type liner tie-back technology is rational in structure, easy to use, good sealing reliable of the tie-back deviceand resistant to high temperature, specially solve the liner tie-back problem in Nanpu Oilfield, where has co-existence of overflow andleakage, and has been successfully used in the oilfield.

关 键 词：南堡油田 尾管回接 封隔式 溢漏同存 回缩距 

分 类 号：TE256.4[石油与天然气工程—油气井工程]