用 Fan- 5 0型高温高压流变仪对聚醚多元醇钻井液高温流变性进行了实验研究 ,对描述该钻井液高温流变性的流变模式进行了优选。实验结果表明 ,幂律模式和赫 -巴模式是描述该钻井液流变性能的较佳模式 ;随温度的升高 ,该钻井液流型指数 n、稠度系数 K、高剪切粘度 ηH和赫 -巴模式的屈服值 τH呈先升高后降低的变化趋势 The rheological properties of polyether polyol drilling fluid were investigated by using Fan-5 0 high temperature and high pressure rheometer. The rheological model describing the high temperature rheology of the drilling fluid was optimized. The experimental results show that the power law model and He-Ba mode are the best modes to describe the rheological properties of the drilling fluid. With the increase of temperature, the drilling fluid flow index n, consistency coefficient K, high shear viscosity ηH and He - Ba mode yield value τH first increased and then decreased