摘要
针对火烧油层技术注入井出现的高温、腐蚀和监测难等问题,研制了新型过电缆热敏封隔器。该工具设计有2道不同内、外径的同心轴向通道,能有效地保护电缆在封隔器运动过程中不受磨损,同时封隔器的坐封和解封过程不受电缆影响。室内试验成功模拟了该封隔器在350℃高温、10 MPa高压下的密封性能。现场试验结果表明:在点火过程中,火烧油层过电缆热敏封隔器保障了监测数据的实时传输,满足封隔器下部高温,而上部温度不足80℃的要求,在持续注气40个月条件下,油压达到5.1 MPa,套压达到0.1 MPa。该封隔器的研制有效地解决了火烧油层技术点火过程中的监测、密封以及防止油套环空腐蚀等问题,保障了井筒安全。
To address the problems of high temperature, corrosion and monitoring difficulty in the injection well in the in-situ combustion formation, a novel through-cable thermal-sensitive packer was developed. The tool is designed with two concentric axial channels with different inner and outer diameters, which can effectively protect the cable from being worn during the movement of the packer. Meanwhile, the packer’s setting and releasing process is unaffected by the cable. The indoor test successfully simulated the seal of the packer under high tempera- ture of 350 Tl and high pressure of 10 MPa. The field test results show that during the ignition process, the through-cable thermal-sensitive packer for the in-situ combustion formation ensures the real-time transmission of mo- nitoring data,meeting requirement of the packer working environment with the lower part in high temperature while the upper part in the temperature of less than 80 Xl. After continuous gas injection for 40 months, the tubing pres-sure reaches 5. 1 MPa, and the casing pressure reaches 0. 1 MPa. The developed packer could effectively address the problems of monitoring and sealing in the ignition process of in-situ combustion development, as well as preven-ting casing-tubing annulus corrosion, thus ensuring the wellbore safety.
出处
《石油机械》
北大核心
2018年第2期63-67,共5页
China Petroleum Machinery
基金
国家"十二五"重大科技攻关示范项目"火烧油层开发技术先导试验"(2011ZX05053)
国家自然科学基金项目"基于构型力学理论的井壁损伤失稳研究"(51674200)
关键词
热敏封隔器
电缆
火烧油层
同心轴
thermal-sensitive packer
cable
in-situ combustion
concentric axis
