Spatiotemporal X-Ray Imaging of Neat and Viscosified CO2 in Displacement of Brine-Saturated Porous Media

Spatiotemporal X-Ray Imaging of Neat and Viscosified CO2 in Displacement of Brine-Saturated Porous Media

Boxin Ding, Apostolos Kantzas, Abbas Firoozabadi

Efficiency and safety of CO2 storage in saline aquifers can be improved by direct viscosifcation at low concentration of engineered molecules. Our engineered molecules have negligible solubility in brine, very low adsorption to the rock and are mildly affected by temperature. X-ray CT imaging of displacement experiments is conducted to quantify the in-situ sc-CO2 saturation spatiotemporally. The imaging data advance the understanding of boundary conditions, brine production, and local residual brine saturation. The combination of mobility control and residual brine saturation reduction from interfacial elasticity improve sweep efficiency significantly and increases the solubility trapping.

SPE J. 1–16. (2024) SPE-214842-PA
Corresponding Author: Abbas Firoozabadi

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