稠油油田通常采用热采方式进行开采，而高温热采会对井下防砂筛管造成损坏。为了分析稠油热采时不同材质的防砂基孔筛管在高温情况下的热稳定性，在已有现场数据的基础上运用 Ansys Workbench14.0软件对井下不同材质筛管的热应力以及变形情况进行仿真分析，仿真结果与现场数据吻和较好。由数值模拟结果得出：在高温工况下不同材质筛管所受到的最大热应力均超过了各自的屈服强度，造成破坏，筛管的变形主要集中在基孔处，长久下去基孔筛管会出现防砂失败、基孔堵塞稠油的渗入，甚至油田停产报废的情况。研究结果表明，热应力补偿器的配备可以明显地提高防砂筛管的热稳定性，延长筛管的使用寿命。%The thermal recovery method is usually used in heavy oil fields.High temperature thermal recovery damages the downhole anti-sand sieve tubes.To study the thermal stability of anti-sand base hole sieve tubes made by different materials in heavy oil thermal recovery under the condition of high temperature,we simulated and analyzed the corresponding thermal stress and deformation by using Ansys Workbench based on data collected.The simulation results show that under high-temperature conditions the maximum thermal stress of sieve tubes in different materials exceeds their respective yield strength;the deformation of sieve tubes mainly concentrates on the base hole.If this situation continued for a long time,basic hole sieve tubes would rendered failure in sand control,which leads to the blockage of basic hole,the penetration of heavy oil,or even the shut-down of oil fields.This research reveals that the thermal stress compensator can significantly improve the thermal stability of anti-sand sieve tubes and prolong the life of sieve tubes.
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