In this study, we numerically investigated the effects of CO₂ gas in geothermal water and the scale deposition formed in the wellbore on the flow characteristics. Geothermal water that contains CO₂ gas has the potential to produce calcite scale deposits in the wellbore. To prevent scale formation, scale inhibitor is injected below the flash point in the wellbore, which is a challenging job. Therefore, using a wellbore simulator to predict the depth of flash commencement and the effects of scale deposition above the flash point on flow characteristics is important. In our numerical simulations, we changed the values of the CO₂ gas concentration to study its effect on the flow characteristics. The simulation results show that the presence of CO₂ increases the flash pressure relative to that of pure water. A higher CO₂ gas concentration in the water will initiate flashing at a lower depth than a lower CO₂ concentration. However, when the presence of scale deposits in the wellbore is taken into account, the calculated wellhead pressure is lower than that in a wellbore without scale deposition.

在这项研究中，我们数值研究了地热水中的CO ₂气体和井眼中形成的水​​垢沉积对流动特性的影响。包含CO ₂气体的地热水有可能在井眼中产生方解石垢沉积物。为了防止结垢，在井眼中的闪点以下注入结垢抑制剂，这是一项艰巨的工作。因此，使用井眼模拟器来预测闪蒸开始的深度以及闪点上方的水垢沉积对流动特性的影响很重要。在我们的数值模拟中，我们更改了CO ₂气体浓度的值以研究其对流动特性的影响。模拟结果表明CO ₂的存在相对于纯水，增加闪蒸压力。较高的CO ₂在水中的气体浓度将启动在比较低的CO更低深度闪烁₂浓度。然而，当考虑到井眼中存在水垢沉积物时，所计算的井口压力低于没有水垢沉积的井眼中的压力。