Temperature field model and numerical simulation of multilayer water injection well
注水井温度场模型及其数值模拟研究

During the middle and late stage of waterflooding oil field it is difficult for temperature log to reflect actual water injection profile in normal water injection conditions. In order to improve temperature log to determine water injection profile, the temperature field models of the wellbore and surrounding formation have been set up for the actual situation of multilayer injection in water injection well based on heat transfer mechanism between wellbore and formation in the paper. The comparison of modeled temperature curve with temperature log shows that the proposed model is correct and applicable. Furthermore, numerical simulation of downhole temperature distribution is carried out for different injection conditions and geological conditions. The results show that the larger the difference between injected water temperature and initial borehole temperature or water injection rate, the more obvious the indication of water accepting zones. Also, reasonable suggestion for improving water injection technics can be proposed to identify water injection profile better with temperature log by analyzing the results of numerical simulation.