home › event - experimental study of rock–fluid interactions using automated multi-channel system operated under conditions of co2-based geothermal systems
Experimental Study of Rock–Fluid Interactions using Automated Multi-Channel System Operated under Conditions of CO2-Based Geothermal Systems
Conferences & Talks
11 February 2013
Frances C. Arrillaga Alumni Center, Palo Alto, California, USA
Carbon dioxide (CO2) has recently been considered as an alternative geothermal working fluid because of some favorable fluid dynamics and heat transfer properties compared to water. While the thermal and hydraulic aspects of CO2-based geothermal systems look promising, major uncertainties remain with regard to chemical interactions between fluids and rocks, particularly during the transition from resident water to supercritical CO2.
We have performed reactive transport modeling to study fluid-rock interactions and its impact on porosity and permeability changes, based on batch experiments with rock and mineral samples and mixtures of water and CO2; these experiments are conducted at temperature and pressure conditions that are representative of typical geothermal systems. Different thermodynamic databases are tested, and the geochemical model is calibrated by adjusting the reactive surface area, as a representative rate controlling parameter, to fit the experimental data of mineral dissolution. The flow and geological conditions of a CO2 geological sequestration site at Cranfield, Mississippi are used for the modeling analyses. The objective of this research is to (1) investigate mineral dissolution and precipitation patterns, (2) evaluate associated porosity changes and effects on fluid and heat transfer, and (3) determine thermodynamic and kinetic reaction rate parameters that can be used to constrain coupled process models.
upcoming events view all
PARC Innovation Lab - A Blueprint for Innovation Leadership
Jeremy Clark, James Glasnapp
24 March 2015 - 25 March 2015
PARC | Palo Alto, CA
A Muddle of Models of Motivation For Using Peer-to-Peer Economy Systems
18 April 2015
Conferences & Talks