压后投产不压井完井作业技术研究  

Research on the completion technology of pressure balance well for production after fracturing

作　　者：王方祥 唐宏宝 白石 孙岩 王志民 李罗鹏[3] WANG Fangxiang;TANG Hongbao;BAI Shi;SUN Yan;WANG Zhimin;LI Luopeng(Downhole Technology Service Company,CNPC Bohai Drilling Engineering Company Limited,Tianjin 300280,China;Engineering Technology Department,CNPC Bohai Drilling Engineering Company Limited,Tianjin 300280,China;School of Petroleum Engineering,China University of Petroleum,Qingdao,Shandong 266580,China)

机构地区：[1]中国石油渤海钻探井下技术服务分公司,天津300280 [2]中国石油渤海钻探工程技术处,天津300280 [3]中国石油大学(华东)石油工程学院,山东青岛266580

出　　处：《中国科技论文》2024年第6期645-651,共7页China Sciencepaper

基　　金：中石油渤海钻探重大技术研发项目(2020ZD08F)。

摘　　要：针对套管压裂后下泵投产存在压井液污染储层及带压作业周期长、成本高的问题,以井下控制为核心,以“井下封堵、井口零压”为目标,研制了3套井筒暂闭塞工具,形成了机械式、压控式、可溶式3种不压井完井作业技术,可根据不同井身结构、压裂后关井的井口压力和地层产出情况优选工艺。井筒暂闭塞工具双向承压为35 MPa以上,耐温150℃,可调节开关压差为10~20 MPa,打开后生产通道直径为40 mm以上,适用于外径为139.7 mm的套管。现场应用表明,系列化的不压井完井作业技术可缩短施工周期4~6 d,对储层无污染,保证了压裂效果,可实现快速建产。Facing the problems of reservoir contamination in terms of killing fluid,long operation cycle and high cost of pressure operation during the process of removing the pump after casing fracturing,mechanical,pressure-controlled,and dissolvable temporary blocker of the wellbore were developed in which the downhole control was the key concern to achieve“downhole sealing,wellhead zero pressure”.Based on this,three types of completion technology of pressure balance well have been developed,which can be optimized based on different wellbore structures,wellhead pressure after fracturing,and formation production.The temporary blockers of the wellbore have a bidirectional pressure bearing over 35 MPa,a temperature resistance of 150℃,an adjustable switch pressure difference of 10-20 MPa,and a diameter over 40 mm after opening.They are suitable for casing production channels with an outer diameter of 139.7 mm.Field application shows that the serialized pressure balance well completion technology possesses the advantages of shortened construction period by 4-6 d,pollution free to the reservoir,fracturing effect ensurance,and rapid production.

关 键 词：压后投产 不压井完井 井下控制 井筒暂闭塞 快速建产 

分 类 号：TE992[石油与天然气工程—石油机械设备]