Assessing roles of geochemical reactions on CO2 plume, injectivity and residual trapping

Abdiaziz Abdullahi Maalim Hisham Ben Mahmud Mojtaba Seyyedi

With increasing CO2 concentration in the atmosphere, CO2 geo-aequestration has become a popular technique to counter the dangers of global warming resulting from high levels of CO2 in the atmosphere. This paper examins sequestration parameters such as CO2 plume behaviour, residual gas trapping and injectivity as a means of achieving safe and successful CO2 storage in saline aquifers. Mineral precipitation/dissolution rates are used to establish a relationship between these parameters and geochemical reactions in saline aquifers. To achieve this, mechanistic models (6 models with different inputs, created using CMG – GEM, 2016 and WINPROP, 2016) are simulated using input data from literature and studying changes in fluids and formation properties as well as mineral precipitation/dissolution rates in aquifers when subjected to different conditions in the different models.

https://doi.org/10.1016/j.engeos.2021.02.002