Methods for enhancing the permeability of reactive rock reservoirs

A method of stimulating a geological formation, the method comprising:

• positioning an acidic fracturing fluid consisting essentially of water, dissolved CO2, CO2 microbubbles, and CO2 nanobubbles in the geological formation,
• wherein the positioning comprises passing the acidic fracturing fluid through an injection well casing to contact reactive rock in the geological formation, and wherein the reactive rock comprises igneous ultramafic, mafic to intermediate rock, high grade mafic to intermediate metamorphic rock, clastic sedimentary rock that consists entirely or partially of minerals and fragments of the igneous and metamorphic rocks listed, chemical sedimentary rocks as banded iron formations, or combinations thereof;
• hydraulic fracturing the geological formation;
• acidizing the geological formation with the acidic fracturing fluid to yield a geological formation with increased permeability;
• and
• performing one or more of the following applications in the geological formation with increased permeability:
• disposal operations of economic interest.