Paper No. 300-7
Presentation Time: 3:00 PM
WETTABILITY ALTERATION BY SUPERCRITICAL CO2-ENRICHED WATER AND ITS IMPACT ON MULTIPHASE FLOW RELATED TO CO2 SEQUESTRATION
Changes in pore networks i.e. pore (throat) size, pore surface roughness and mineralogy induced by supercritical-CO2-water-rock reactions impact petrophysical properties such as porosity, permeability, especially wettability. However, the effect of these changes on relative permeability and capillary pressure curves that would affect multi-phase flow through porous rocks is rarely studied. In this work, contact angle altered as Madison Limestone samples were soaked for 400 hours in CO2-enriched water. Moreover, CO2 flooding results before and after soaking show that water production rate and total water production increased as well. This wettability alteration and pore network change will directly affect CO2 injectivity, migration and storage capacity, thus significantly improving the fundamental understanding of CO2 geological storage processes and reducing the uncertainties for CO2 injection simulation.