Pressure and Temperature Coupling Predict Model of Sulphur Deposition Based on Multiple Phase Flow.

At the production process of wells, with natural gas flowing from the formation into the wellbore, then into the ground, this process is a cool step-down process. With the temperature and pressure gradually reducing, element sulfur will continue coming from natural gas in the deposition. If the gas well production capacity is not less than the speed of airflow to carry out the critical speed of elemental sulfur, the elemental sulfur will be deposited in the wellbore, so the gas wells can not normally produce. At the same time, the deposition of elemental sulfur will cause serious corrosion for wellbore and wellhead. Therefore, the study of the elemental sulfur deposition of the wellbore is completely necessary.