中文摘要：

为研究稠油开采过程中多相存在条件下的井筒流动规律,基于大尺寸井筒油、气、水、砂多相复杂流动物理模拟实验装置,开展了油气水三相携砂流动实验,分析了黏度、液相主流流量、气相主流流量等参数对井筒压降规律及携砂能力的影响规律。结果表明：随着气相主流流量的增大,相同条件下,井筒压降先降低后增大;随着液相主流流量的增加,油气水三相携砂井筒流动压降增大,且基本呈线性变化;气相壁面注入对砂床高度影响不大;气相主流速度、液相主流速度对砂床高度的影响均比较大;随着气相流速与液相流速的增大,砂床高度均明显降低。在实际生产中,采取注气等措施促使液相转化为水包油乳化液将有利于提高单井效益,并保证较长的洗井周期。

英文摘要：

In order to investigate the wellbore flow rule when multiple phases coexist during the development of heavy oil, oil-gas-water three phase sand-carrying flow experiment was conducted based on the physical simulation experimental device with oil-gas-water-sand multi-phase flow in large-size wellbore. The influence rule of viscosity, primary liquid phase flow rate and primary gas phase flow rate on wellhore pressure drop pattern and sand carrying capacity was analyzed. The research showed that under the same condition, the increment of primary gas phase flow rate made wellbore pressure drop decline and then increase. Increment of primary liquid phase flow rate increased wellbore pressure drop with oil-gas-water three phase carrying sand and the change showed a linear rela- tionship. Gas phase injection along the wall had little influence on height of sand bed. The effect of primary gas phase velocity and primary liquid phase velocity on sand bed height was apparent. The increment of gas phase veloc- ity and liquid phase velocity significantly reduced sand bed height. During field production, gas injection can be used to convert liquid phase into oil-in-water emulsion, which is favorable to improving single well efficiency and ensure long purge period.