Modeling of Temperature Effects in CO2 Injection Wells

Abstract

Accurate prediction of temperature in CO2 injection wells is very important in order to select wellhead parameters that will yield desired bottomhole pressure and temperature and avoid complications that may occur due to phase transition along the well. This work presents analytical models related to temperature effects caused by compression of gas in the well and the transfer of heat between the gas and the surrounding rock and vice-versa. These models are integrated in an appropriate pressure model. The resulting model is combined with a robust procedure for estimating thermodynamic and transport properties of the fluid to provide accurate prediction of the temperature in the well. In addition it also offers valuable estimates of thermal conductivities in the rock layers.