Foamed fracturing fluid with scale protection

A system for treating a subterranean formation, the system comprises:

• a foamed fracturing fluid comprising:
• an aqueous base fluid,
• a polymeric gelling agent comprising acrylamide and phosphonate monomers,
• a hydration aid,
• a foaming agent,
• a gel stabilizer,
• a crosslinker,
• an oxidative breaker configured to break the foamed fracturing fluid to release a phosphonate degradation product,
• a pH adjustor, and
• a gas constituent comprising carbon dioxide, nitrogen, or a combination of carbon dioxide and nitrogen;
• mixing equipment configured to mix the aqueous base fluid, the polymeric gelling agent, the foaming agent, the hydration aid, the gel stabilizer, the crosslinker, the oxidative breaker, the pH adjustor, and the gas constituent to form the foamed fracturing fluid;
• and
• pumping equipment configured to pump the foamed fracturing fluid into a wellbore penetrating the subterranean formation;
• wherein the pumping equipment is configured to pump the foamed fracturing fluid at a pressure sufficient to create and/or expand a fracture in the subterranean formation.