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利用由作者提出的井内流动和传热的三维数值模型计算所得的大量数据，文章对影响井内温度的诸多因素进行了较的敏感性分析，研究表明：钻井液和地层等的热物理２参数以及钻井液的入口温度、循环排量等对井内温度有较大影响，因此，准确掌握所钻地区地层和井内钻井液的热物理参数值，考虑温度压力对热物理参数的影响，准确测量钻井的入口温度、排量等参数值，对于井内温度的准确模拟至关重要。

SENSIBILITY ANALYSIS OF THE FACTORS AFFECTING TEMPERATURE IN WELL BORE

??In this paper,the sensibility analysis of the factors affecting the temperature in well bore is relatively systematically made by using a large number of the data calculated with the borehole flow and heat transfer 3??D numerical model proposed by the author.The study shows that the thermophysical parameters of the drilling fluid and formation,etc.and the entrance temperature and circulating capacity,etc.of drilling fluid have a greater influence on the temperature in well bore.Therefore,accurately mastering the thermophysical parameter values of penetrated formation and drilling fluid in well bore,considering the influence of the temperature and pressure on thermophysical parameters and accurately measuring such parameters as entrance temperature and discharge capacity of drilling fluid,etc.are of utmost importance for accurately simulating the temperature in well bore.