System and Methodology for Rapid Evaluation of Geothermal Rock-Fluid Interactions Associated with CO2-EGS

Abstract

PARC has developed an integrated multichannel reactor system, fed by a mixture of gases, liquids and supercritical fluids, operating in a wide range of high-pressure and high-temperature conditions, and coupled to an on-line diagnostics system for complex ion analysis at the real time and under the reaction/interaction conditions. The system is suitable for rapid screening of mineral solubility or monitoring a dissolution process, mimicking an underground setting and geothermal-like situations. The applications of interest include mapping out transition of a reservoir from water to dry supercritical CO2, understanding the role of naturally dissolved gases and minerals on development of underground water pathways, predicting the effect of injected waste water purity on native rock solubility, assessment of risks and benefits associated with precipitation-redissolution processes during reservoir stimulation, and many others. We will discuss the performance of the system and show some preliminary data on behavior of diverse minerals in a wide range of fluid environments.