ANALYSIS AND CALCULATION OF THE TEMPERATURE EFFECT IN THE WATER INJECTION STRING

According to the general demand of management water injection well,and practical technique,the author studied the temperature profile at all kinds of working condition and the temperature’s change when the condition is changed in water injection string.Based on these analysis and from the heat conduction equation and heat effect equation of the well string,a serial of accurate method was derivated to solve the temperature effect in the water injection string.It can help to design the water injection string rationally.The influence of temperature effect was proved according to calculation example and analysis,and the sealing failure cause of the packer was found.By designing the water injection string and the tools rationally,the working life of the water injection string is longer and the duty cycle is shorter.So the development benefit in water injection of oil field is proved.