This experimental study shows that Geochemical interactions can have a large impact on rock mechanical properties during Geological Carbon Storage in saline aquifers.

Geochemical interactions can explain field observations of seismic wave velocity drops (especially S waves).

Geochemical interactions can weaken the rock to the point where it would yield (deform significantly).

This means that carbonates fast reaction to brine acidification will impact injection operations and injection monitoring.

In the current state of knowledge this impact is quite unpredictable and this study aims at giving a first order tool to evaluate it.