RREDICTION OF TEMPERATUREPROFILE IN OIL WELLS

A mathematical model has been developed to predict the temperature distribution inAbstract wellbores either offshore or inshore. I t is incorporated the different act ivit ies encountered during drilling operations. Furthermore, the effect of drill collar and casings and bit rotating in a well during completion has been considered. The two dimensional approach is presented in the form of a computer program which is adopted for solu t ion of the finite difference equations describing the heat transmission in the wellbore in the form of a direct solution technique. The power law mode l has been select ed for drilling mud and its indices have been calcu lated. Comparing measured data, recorded for a period of 82 hours during different act ivit ies in a drilling operat ion for 15/20A-4, an explorat ion well in the Central North Sea with calcu lated results, show there is a good agreement between the prediction and measured temperatures in the wellbore