Abstract
During the production process of high temperature and high pressure gas well, high temperature fluids are produced from the formation. The change of wellbore temperature and pressure, due to the change of production, has an important impact on the production tubular column, which threatens the safety of the completion tubular column and the integrity of the wellbore. A single-phase gas transient flow temperature–pressure coupling mathematical model is developed for the fluid in the tubular column during gas well production, and the pressure and temperature distribution patterns of the gas in the tubular column during gas well production are obtained, and the influence of production rate on the temperature–pressure distribution in the tubular column during gas well production is analyzed. The coupled temperature–pressure model takes into account the mutual influence of temperature and pressure during the transient flow of gas in the column, and the comparison with the measured data in the field and the calculation results of the analytical model shows that the coupled model has higher accuracy. The model will provide theoretical support for the selection and optimal design of completion production tubular tools.
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