Core-shell particles for treatment of subterranean formations

A method of treating a subterranean formation, the method comprising:

• adjusting a composition of a hydrophilic core of a core-shell particle to reduce the hydrolysis rate of the hydrophilic core in the presence of an acid,
• wherein the core-shell particle comprises:
• the hydrophilic core comprising the acid;
• a hydrophobic shell, wherein the hydrophobic shell covers about 50% to about 100% of the surface area of the hydrophilic core, and wherein the shell forms from about 0.001 wt % to about 98 wt % of the overall weight of the core-shell particle;
• and
• a viscosifier, wherein the viscosifier is present in an amount of about 0.0001 wt % to about 10 wt % of the core shell particle;
• placing a treatment fluid composition comprising the core-shell particle in the subterranean formation;
• and
• swelling the hydrophilic core up to 25 times by volume of the composition, wherein the hydrophilic core swells in the presence of the acid, and wherein the hydrophilic core comprises a hydrochloric acid payload;
• and
• releasing at least a partial amount of the hydrochloric acid payload from the hydrophilic core.