Abstract
In the framework of application of geological carbon storage (GCS), carbon dioxide (CO2) injection may lead to substantial cooling of the reservoir. Such cooling lasts for many years. In this chapter, up to date available data on thermal effects from various GCS sites are compared with theoretical results. Solutions for the latter are given for one- and two-dimensional models with a nonisothermal multiphase flow code, in order to consider simultaneous fluid flow and heat transport and to allow for dependencies of thermophysical properties on temperature. Additionally, temperature perturbations for some large-scale GCS projects are reported. Temperature changes induce thermal stresses that may compromise caprock stability. Additional research on GCS thermal effects is necessary to be able to optimize injection and minimize risks for caprock sealing capacity more confidently.
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