稠油井筒掺稀降粘模拟研究

掺稀降粘是超稠油井筒举升过程中有效降低井筒摩阻的方式之一。针对现有的掺稀优化评价方法，本文根据掺稀工艺建立了超稠油井筒掺稀降粘模拟装置，通过和旋转粘度计测量结果对比，结果表明该装置能够适用于井筒降粘模拟测量。在此基础上，模拟不同掺稀比条件下的井筒粘度变化。对比结果发现，井筒掺稀降粘是一个动态的变化过程，沿着井筒流动，稀油不断分散稠油，降粘效率也不断增大。

Simulation and Optimization for Super Heavy Oil Artificial Lift with Light Oil Blending

During the production of Xinjiang deep heavy oil reservoir, the loss of fluid mobility with the decrease of temperature is a serious problem. The light oil blending is an effective way to reduce wellbore friction. According to the in-situ light oil mixing technique, the experimental setup is built for simulating the dynamic mixing process during the addition of light oil. The variation of the mixture viscosity with the decrease of the wellbore temperature is also measured. The results show that the setup has a good performance on simulation. And the increase of the light oil ratio is able to decrease the friction effectively. Comparison of results with rotational viscometer, viscosity reduction in wellbore is a dynamic process, along the wellbore flow, the dispersed oil heavy oil, viscosity reducing efficiency also increases.