摘要
采用井筒气液多相流理论分析了隔水管外溢流早期监测的可行性,基于多普勒超声波原理,设计了隔水管外气侵早期监测模拟实验平台,开展了多普勒超声波在气-清水(蔗糖溶液)两相流中的传播实验,并对信号进行了时域、频域分析。研究表明:①无论开泵循环或停泵,深水钻井隔水管外多普勒超声波信号电压均值均随着含气率的上升先上升后下降,并与含气率具有二次函数关系,采用监测信号电压均值变化可定量反推对应含气率的近似值。多普勒超声波信号在黏度较大的溶液中幅值明显减小且变化趋势变缓,黏度的影响远大于密度。②停泵状态下多普勒频移量随含气率的增大而增大,二者基本呈线性关系,采用监测多普勒频移量可定量描述含气率的变化。开泵循环状态下变频器产生的声能对幅度谱的影响超过了含气率的影响,频域信号分析不能判断是否发生气侵。③隔水管外多普勒超声波法气侵早期监测为非接触式测量手段,不直接接触流体、不受钻井工况影响,可根据多普勒超声波信号的变化对含气率进行定量表征,实现深水钻井气侵的早期监测。
The feasibility of gas kick early detection outside the riser was analyzed based on gas-liquid multiphase flow theory.Then an experimental platform for gas kick early detection based on Doppler ultrasonic wave was established and the propagation experiments in two-phase flow of gas-water(sucrose solutions)were conducted.The time and frequency domains of the Doppler ultrasonic wave signals during the experiments were analyzed.The results show that:(1)No matter the pump was on or off,the detected average Doppler ultrasonic signal voltage increased first and then decreased with the increase of the gas void fraction,and had a quadratic function relation with gas void fraction,so the average voltage change of the monitored signals can be used to deduce the approximate gas void fraction.The Doppler ultrasonic wave signal voltage was significantly reduced in magnitude and variation in the solution with higher viscosity,and the viscosity has stronger impact on the magnitude of signal than density.(2)When the pump was stopped,the Doppler shift increased with the increase of gas void fraction,and the two showed a nearly linear relation,so the detected amount of Doppler shift can reflect the variation of gas void fraction quantitatively.When the pump was on,the sound energy produced by frequency converter had a more significant impact on amplitude spectrum than gas void fraction,so it is impossible to determine whether gas kick occurs by frequency domain signal analysis.(3)This method is a non-contact measurement,with no contact with the drilling fluid and no disruption to the drilling operation.It can quantitatively characterize the gas void fraction according to the change of Doppler ultrasonic signal,enabling earlier detection of gas kick.
作者
尹邦堂
林英松
王志远
孙宝江
刘书杰
孙金声
侯健
任美鹏
王宁
YIN Bangtang;LIN Yingsong;WANG Zhiyuan;SUN Baojiang;LIU Shujie;SUN Jinsheng;HOU Jian;REN Meipeng;WANG Ning(Key Laboratory of Unconventional Oil&Gas Development,Ministry of Education,Qingdao 266580,China;School of Petroleum Engineering,China University of Petroleum(East China),Qingdao 266580,China;CNOOC Research Institute Co.Ltd.,Beijing 100028,China)
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2020年第4期789-797,共9页
Petroleum Exploration and Development
基金
国家自然科学基金重大项目课题“天然气水合物钻采井筒多相流动障碍形成机制与安全控制方法”(51991363)
国家重点基础研究发展计划(973)项目“海洋深水油气安全高效钻完井基础研究”(2015CB251200)
教育部长江学者团队项目“海洋油气井钻完井理论与工程”(IRT_14R58)
中海石油有限公司项目“莺琼盆地高温高压钻完井、测试安全技术研究”(CNOOC-KJ135ZDXM24LTDZJ04)。
关键词
深水钻井
隔水管
多普勒超声波
气液两相流
信号分析
气侵早期监测
deepwater drilling
riser
Doppler ultrasonic wave
gas-liquid two phase flow
signal analysis
early detection of gas kick
作者简介
第一作者:尹邦堂(1985-),男,山东青州人,博士,中国石油大学(华东)石油工程学院讲师,主要从事井筒多相流理论及应用、深水钻井井控工艺技术、深水油气井井筒流动保障技术等方面的研究。地址:山东省青岛市黄岛区长江西路66号,中国石油大学(华东)石油工程学院,邮政编码:266580。E-mail:yinbangtang@163.com;联系作者:林英松(1964-),女,山东乳山人,博士,中国石油大学(华东)石油工程学院教授,主要从事油气井工程、岩石力学与工程等方面的研究。地址:山东省青岛市黄岛区长江西路66号石油工程学院,邮政编码:266580。E-mail:linyingsong@upc.edu.cn。
