Y管压裂生产一体化管柱工艺及配套工具研究  

Technology and Support Tools of Y-Pipe Fracturing-Production Integrated String

作　　者：吴建树 武广瑷 季菊香 李准 张云驰 陈峥嵘 刘鹏 Wu Jianshu;Wu Guang'ai;Ji Juxiang;Li Zhun;Zhang Yunchi;Chen Zhengrong;Liu Peng(CNOOC Research Institute Co.,Ltd.;CNOOC EnerTech-Drilling&Production Co.,Ltd.)

机构地区：[1]中海油研究总院有限责任公司,北京市朝阳区100020 [2]中海油能源发展股份有限公司工程技术分公司

出　　处：《石油机械》2024年第11期67-72,共6页China Petroleum Machinery

基　　金：中国海洋石油集团有限公司“十四五”重大科研项目所属课题“海上大型压裂工程技术研究”(KJGG2022-0704);中海油能源发展级科研基金项目“增储上产关键技术/产品研究重大专项”(HFKJ-ZX-GJ-2023-02)部分成果。

摘　　要：针对常规压裂管柱压裂后需先起压裂管柱,再下入电潜泵生产管柱,压裂与返排间隔时间过长增加压裂液污染储层的风险,且其无法批量压裂,作业成本高等问题,研究了Y管压裂生产一体化管柱工艺。通过在Y接头内预置密封隔套的方式防止砂液进入电泵,压裂后通过钢丝作业可将密封隔套捞走,不影响后期的启泵。为了压裂时可监测环空压力同时保证电潜泵的顺利运行,研发了液控穿越隔离封隔器,该封隔器在压裂时不坐封,压裂后通过向地面的液控管线加液压完成该封隔器的坐封。通过对预置Y接头密封隔套总成进行数模和物模分析,得到该工具压裂后的打捞上提力约为2.65 kN。现场应用结果表明,该封隔器通过液控管线坐封,可减少2趟钢丝作业,缩短井口占用时间,也适用于设备不足的无人平台。研究结果可为我国海洋石油装备提供更多选择。In conventional fracturing,the fracturing string is pulled out of hole,and then the electrical submersible pump(ESP)production string is run in hole.In this process,the time interval between fracturing and flowback is long,imposing a higher risk of reservoir damage by fracturing fluid.Moreover,fracturing cannot be conducted in batches,resulting in high operation costs.To solve these problems,a Y-pipe fracturing-production integrated string was designed.The sand fluid was prevented from entering the ESP by presetting a sealing spacer in the Y-joint.After fracturing,the sealing spacer was fished by wireline,without affecting the later pump start-up.In order to monitor the annulus pressure during hydraulic fracturing and ensure the trouble-free operation of the ESP,a hydraulic control crossing isolation packer was developed.This packer was not set during fracturing,but set by applying hydraulic pressure to the surface hydraulic control pipeline after fracturing.Numerical and physical simulations were conducted on the sealing spacer assembly preset in the Y-joint,obtaining the post-fracturing fishing pick up force of the tool as about 2.65 kN.Field applications show that the packer is set by hydraulic control pipeline,can reduce two wireline operations and minimize wellhead occupation time,and is also suitable for unmanned platforms with insufficient equipment.The research results provide more choices for offshore petroleum equipment in China.

关 键 词：压裂生产 一体化管柱 Y管生产井 预制密封隔套 弹性机构打捞 

分 类 号：TE934[石油与天然气工程—石油机械设备]