CO_2井筒压力温度的分布

Study of distribution of wellbore pressure and temperature of CO_2 injection well

根据垂直管流的能量平衡方程,结合Ramy井筒温度分布计算方法,推导出CO2在不同的注入速度、注入温度、注入时间等因素下的井筒压力和温度分布。以苏北工区草8井试注实测数据为例加以验证,验证结果压力误差3.8%,温度误差2.5%。在此基础上进一步讨论了影响CO2井底温度的因素,并预测了3口注入井井筒压力温度分布。

In the light of the energy balance equation of vertical conduit flow and combined with the computational method for the Ramy wellbore temperature distribution, the paper gives the distributions of wellbore pressure and temperature when CO2 is injected at different injection rates, injection temperatures and injection time etc. and verifies it by actual data of injection test at Cao-8 Well in Subei Oilfield. The result is that the error percentage of pressure is 3.8 % and the error percentage of temperature is 2.5 %. On the basis of this, the paper further discusses the factors influencing wellbore temperature of CO2 injection well and believes that the injection rate of CO2 is the main influence factor.