Patent ID: 8403051

Claim:
A method for acidizing a subterranean carbonate-containing formation, the method comprising: injecting a stabilized emulsified acid into the subterranean carbonate-containing formation, where the stabilized emulsified acid comprises: from about 13 to about 45 vol % of at least one oil; from about 50 to about 85 vol % of an aqueous acid solution comprising at least one acid; from about 1 to about 5 vol % of at least one emulsifier; and from about 0.1 to about 5 wt % of acid insoluble nanoparticles, having an average particle size of about 1000 nanometers or less, where the acid insoluble nanoparticles are selected from the group consisting of clays, quartz, tungsten oxide, graphite, graphene, graphene oxide, nano-carbon tubes, and nano-diamonds and combinations thereof; and dissolving at least a portion of the carbonate in the formation with the acid.