| Title | Theoretical Simulations of Chemical Behaviors in pH Modified Brines/Rock Interaction. |
|---|---|
| Authors | K. Kato, A. Ueda, T. Sato, M. Sato and S.P. White |
| Year | 2005 |
| Conference | World Geothermal Congress |
| Keywords | pH interaction theoretical simulation |
| Abstract | Theoretical simulations have been performed to investigate chemical and mineral changes during the interaction of pH modified brine (pH 5.5) and reservoir rocks. Two types of models (porous and fracture) were examined using an improved ChemTough2 code for the kinetics of mineral precipitation/dissolution. In the vicinity of reinjection well, the brine pH increases to ~8 and the rock porosity decreases due to the precipitation of anhydrite. There is no appreciable difference in the chemistry of pH modified and non-modified brines. |