In water— cut conventional heavy oil production process, oil and water exist synchronously in well hole and the viscosity of oil/water mixture cannot be tested accurately by conventional coaxial cylinder rotational viscometer. To solve this problem, the agitator is used to build the viscosity calculated mode. The effects of light oil proportion on viscosity of produced mixture have been studied through simulated experiment of well bore temperature field. The oil—water mixture will show the trends of formation of W/O emulsion when augmenting light oil proportion in high water cut well and its viscosity will emerge peak value. The viscosity reducing rate will reach over 99 ％ or more when augmenting light oil mass of water—free heavy oil well, lower temperature will lead to better performance of viscosity decrease.%利用搅拌实验装置建立了油水混合液粘度测量计算式,初步解决了含水稠油井开采中普通同轴旋转粘度计无法准确测得油水两相混合液粘度的问题.通过室内井筒温度场模拟实验,研究了不同掺稀质量下油井产出液的流变性.结果表明,大量增加含水井的稀油注入质量,产出液将呈现形成W/O乳状液的趋势,其粘度变化存在峰值;不含水稠油井的降粘率随掺稀质量的提高而增大,其值可达99%以上,温度越低降粘效果越好.
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