Mineralization of carbon dioxide sequestered in volcanogenic sandstone reservoir rocks

CO2 mineralization in volcanogenic sandstones: geochemical characterization of the Etchegoin formation, San Joaquin Basin

“…Our results suggest that the input numbers of reactive mineral abundances and surface areas in Zhang et al . 1 are applicable to natural volcanic sandstones, while porosity and permeability could be potentially larger than previously assumed. Using the new data from real volcanic sandstones samples, modeling results are even more promising than the results in Zhang et al ., 1 given the same conditions and assumptions.…”

“…1 are applicable to natural volcanic sandstones, while porosity and permeability could be potentially larger than previously assumed. Using the new data from real volcanic sandstones samples, modeling results are even more promising than the results in Zhang et al ., 1 given the same conditions and assumptions. Th ere have been several eff orts to characterize sandstone composition and reactive surface areas of minerals for quantitative prediction of CO 2 injection in the subsurface.…”

“…(2013) 1 Th e specifi c model we used for our calculation as in Zhang et al . 1 is a 1-D model with distance d ranging from 0 m to 100 km, which can be considered as infi nitely long. For boundary conditions, there is no fl ow at both d = 0 m and d = 10 5 m. Th e injection well section.…”

“…Since precipitation rate data for most minerals are unavailable, only parameters for neutral pH rates were employed to Figure 10 suggests that the CO 2 aff ected region is limited to a radial distance of about 4500 m, which is close to the result of Zhang et al . 1 using a model with a much lower permeability. Th is result indicates that the radial distance of CO 2 fl ow is not aff ected extensively by permeability when CO 2 injection rate is fi xed.…”

Precipitation in Pores: A Geochemical Frontier

“…Moreover, precipitation reactions may have non-linear effects on permeability: Tartakovsky et al (2008) found that an impermeable layer of CaCO 3 could form within a reactor with only a 5% reduction in porosity (see below). From these studies it is clear that porosity alone cannot be used to predict permeability, therefore one can incorporate additional empirical parameters that affect permeability, such as (Bloch 1991; Zhang et al 2013): grain size rigid grain content, sorting…”