Abstract: Well bore pressure is an important parameter for gas well production. The changes of wellbore temperature should be considered when predicting wellbore pressure distribution, because the temperature has an effect on the pressure calculation. This paper proposes different calculation thoughts for opening and shutting stages to analyze the nonlinear distribution of wellbore temperature, by which the corresponding distributions of wellbore pressure in two stages are predicted. The case study shows that the predicted wellbore pressure result considering nonlinear temperature distribution is more accurate.

Key words: abnormal high pressure, wellbore temperature, nonlinear, wellbore pressure, prediction, forecast