Performance Assessment of Enhanced Geopolymer Cement Technology for CO2-Rich Well

The unique characteristics of Portland cement in terms of properties, availability and cost does not allow it to be replaced in many cases. However, there is a certainty about the properties of Portland cement in the long term because of thermodynamical instability of cement in the environment. These fundamental limitations of cement have prompted us to search for and study new materials with improved properties. According to a number of criteria, geopolymers were chosen as the most promising material. In this paper, the geopolymer formulations with 15 ppg density was prepared in the laboratory and the properties of the set geopolymers were investigated before and after exposure to an aggressive CO2 atmosphere. Results of 4-, 10- and 24-weeks exposure of geopolymers were compared with 15 ppg G cement and slag cement samples in the same conditions. Geopolymers demonstrated superior stability over G cement and slag cements at acidic conditions. Copyright 2023, Society of Petroleum Engineers.