稠油热采热流体循环加热过程中的井筒温度分布  

Wellbore temperature distribution during cyclic hot fluid heating in heavy oil thermal recovery

作　　者：谢涛 陈毅 刘海龙 李光辉 XIE Tao;CHEN Yi;LIU Hailong;LI Guanghui(Tianjin Branch of CNOOC Ltd.,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《断块油气田》2024年第3期512-518,共7页Fault-Block Oil & Gas Field

摘　　要：针对稠油开采时闭式热流体循环加热井筒产出流体的情况,文中建立了循环加热流体和产出流体的二维瞬态温度分布模型,充分考虑了对流换热、轴向传热以及热源项对热流体加热产出流体的影响。使用有限体积法对模型进行求解,并分析了热流体入口温度、热流体流量、热流体加热深度、产液量对产液温度的影响规律,以及这4个因素发生变化时对产液温度的影响程度。通过与现场实测数据及其他模型进行对比,验证了文中建立的温度模型的准确性。研究结果表明,热流体入口温度变化对产液温度的影响程度最大,产液量变化和热流体流量变化的影响程度比较接近,而热流体加热深度变化的影响程度较小。该研究成果对于热流体循环加热开采稠油的现场生产具有指导意义。Aiming at the situation of cyclic heating of wellbore-produced fluid by closed hot fluid,a two-dimensional transient temperature distribution model of the cyclic hot fluid and the produced fluid was established,considering the effects of convective heat transfer,axial heat transfer and heat source on heating of produced fluid by hot fluid.The finite volume method was used to solve the model,and influence rules of hot fluid inlet temperature,hot fluid flow rate,heating depth of hot fluid and produced fluid quantity on produced fluid temperature and the effect degree of these four factors on produced fluid temperature when they change were analyzed.The accuracy of the temperature model established in this paper was verified by comparing with field-measured data and other models.The results indicate that changes in inlet temperature of hot fluid have the greatest effect on produced fluid temperature,while changes in produced fluid quantity and hot fluid flow rate having a similar degree of effect,and the effect of changes in hot fluid heating depth is relatively small.The research results are of great significance for guiding the on-site production of cyclic hot fluid heating in heavy oil thermal recovery.

关 键 词：稠油 热采 热流体循环 井筒温度 

分 类 号：TE357[石油与天然气工程—油气田开发工程]