Analysis on Influential Factors of Well Temperature for Deepwater Drilling

SUN Shihui, YAN Tie, BI Xueliang, YU Guoqing


Wellbore circulating temperature must be predicted accurately to prevent gas hydrate and safe well construction operations during deepwater drilling. A model for predicting wellbore temperature distribution in deep water wells during circulation has been developed in terms of thermodynamics theory in this paper. And the influential factorsare analyzed. Model calculation results indicate that temperature profile is strongly dependent on mud specific heat and thermal conductivity, mud density and flow rate dependence of temperature effects is small. Wellbore temperature is dynamic, temperature increases with the increase of circulating time, and tend to be constant when circulating time reaches a certain value. And geothermal gradients of formation under mud line have a significant influence on wellbore temperature.
Key words: Temperature distribution; Deepwater drilling; Thermodynamics theory; Influential factors


Temperature distribution; Deepwater drilling; Thermodynamics theory; Influential factors

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