Re-calculated compositional data from available formation water information offer multiple applications. They may be applied to correctly identify in-reservoir hydrogeochemical conditions prior to technical measures such as injection of seawater, low salinity water or “designer water”. The WiPS hydrogeochemical modeling approach can furthermore help to avoid undesirable effects of formation water-rock-gas interactions which are caused by water injection or chemicals.
In order to correctly recalculate the hydrogeochemical sitution in the deep aquifer, batch and one-dimensional reactive transport modeling is performed under consideration of the dependance of the equilibrium distribution of species on temperature, pressure and ionic strength.
Suitable tools for hydrogeochemical recalculations were developed by the U.S. Geological Survey:
The application of both tools allows to correctly model hydrogeochemical processes under high temperature, pressure and ionic strength conditions (Bozau and van Berk, 2013). Such modeling approaches can simulate the sampling-induced effects which are due to
By using such a re-constructed chemical in-situ composition of formation water, subsequent hydrogeochemical modeling can be applied: