摘要
针对稠油注气开采过程中井筒多相流流动参数难确定的问题,研究了稠油举升过程中井筒内气液两相流的流动型态。通过开展较高黏度流体垂直管气液两相流试验,借助高速摄像机观察不同油品黏度(60、100和290 cp)、不同液相表观流速(0.2、0.5和0.8 m/s)条件下管道中的环状流转换现象,以气液两相流理论与流体动力学为基础,提出了一种考虑液相黏度的井筒气液两相环状流形成的判别方法,即在气液两相间滑脱速度与液体黏滞力和重力引起的速度损失相等时,环状流开始形成,以此建立了环状流转变界限模型。在试验工况下,新模型可以准确地预测环状流的形成,但随着液相流速的增加,环状流逐渐接近判别界限。研究结果为进一步开展较高黏度气液两相流流动规律研究奠定了基础。
In order to determine the multiphase fluid flow parameters of wellbore in the process of recovering heavy oil by gas injection,the flow pattern of gas-liquid flow in wellbore in the process of lifting heavy oil were studied.In this paper,by means of conducting gas-liquid flow experiment of high viscosity fluid in vertical pipe,with the help of high-speed camera,the annular flow transition phenomenon in the pipe under different oil viscosities(60,100,290 cp)and different liquid apparent flow rates(0.2,0.5,0.8 m/s)were observed;then,based on the gas-liquid flow theory and fluid dynamics,a method for discriminating the formation of gas-liquid annular flow in wellbore that has considered liquid viscosity was proposed,i.e.,when the slip velocity between gas and liquid phases is equal to the velocity loss caused by liquid viscosity and gravity,the annular flow begins to form;and finally,the annular flow transition boundary model was established.Under the working conditions covered by the experiment,the new model can accurately predict the formation of annular flow,but as the liquid flow rate increases,the annular flow gradually approaches the discriminant boundary.The study results lay a foundation for further studying the law of high viscosity gas-liquid flow.
作者
颜冬芝
雷宇
廖锐全
伍振华
刘自龙
Yan Dongzhi;Lei Yu;Liao Ruiquan;Wu Zhenhua;Liu Zilong(School of Petroleum Engineering,Yangtze University;Multiphase Flow Laboratory,CNPC Gas Lift Test Base;Engineering Technology Research Institute of PetroChina Tuha Oilfield Company;CNPC Gas Lift Test Base)
出处
《石油机械》
北大核心
2022年第3期93-99,共7页
China Petroleum Machinery
基金
国家自然科学基金项目“多种通讯约束下网络化智能系统性能分析与优化设计”(62173049)
“基于Hybrid数据的复杂系统辨识与优化设计及在低渗透油井中的应用”(61572084)
国家“十三五”科技重大专项“CO2驱油藏全生命周期举升工艺及配套技术研究”(2016ZX05056004-002)
“致密油储层高效体积改造技术”(2016ZX05046004)。
关键词
稠油气举
气液两相管流
黏度
新液膜速度
环状流
转变准则
Gas lift of heavy oil
gas-liquid pipe flow
viscosity
new liquid film velocity
annular flow
transition criteria
