Numerical Simulation to Study Feasibility of Using Supercritical CO2 as a Stimulation Agent for Enhanced Geothermal Systems


Tianfu Xu and Karsten Pruess

Key Words:

EGS, Supercritical CO2, Mineral dissolution, Porosity enhancement, Reactive transport modeling


Stanford Geothermal Workshop







File Size:


View File:


Geothermal injection wells are often drilled into formations containing reactive minerals such as calcite. Injecting aqueous chemical agents such as mineral acid (HF) and nitrilotriacetic acid (NTA), could be effective for mineral dissolution and porosity enhancement at distances of several meters around a geothermal well. An alternative to treatment with strong acids is the use of supercritical (SC) CO2 as stimulation agent for aqueous-based enhanced geothermal system (EGS). Using SC CO2, mineral dissolution and porosity enhancement may penetrate into the formation much longer distance. Reactive transport modeling is used to investigate the effectiveness of this method. The mineralogical composition from a well of Desert Peak EGS site is employed. Preliminary modeling results will be presented.

ec2-18-204-56-97.compute-1.amazonaws.com, you have accessed 0 records today.

Press the Back button in your browser, or search again.

Copyright 2010, Stanford Geothermal Program: Readers who download papers from this site should honor the copyright of the original authors and may not copy or distribute the work further without the permission of the original publisher.

Attend the nwxt Stanford Geothermal Workshop, click here for details.

Accessed by: ec2-18-204-56-97.compute-1.amazonaws.com (
Accessed: Thursday 29th of September 2022 05:11:34 AM