Abstract
Injecting carbon dioxide for storage can lead to substantial cooling of the reservoir that lasts for many years. This paper compares temperature data from the first stage of the CO2CRC Otway Project with theoretical results. Solutions are given for one-dimensional models of vertical and spherical heat diffusion and a radial model of lateral heat transport, and used to delineate the extent to which vertical heat transport follows spherical or linear equations. Solutions are also presented for two-dimensional radial simulations of CO2 injection with the non-isothermal multiphase flow code TOUGH2, to allow for the dependence of the thermal conductivity on CO2 saturation. Finally the size and duration of the temperature perturbation resulting from larger-scale CO2 injection projects are calculated.
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