EMULSIFIED ACID WITH HYDROPHOBIC NANOPARTICULATE FOR WELL STIMULATION

摘要

A composition in the form of an emulsion having: (i) a continuous oil phase comprising: (a) an oil; (b) an emulsifier; and (c) a particulate comprising an oxide selected from the group consisting of metal oxides, metalloid oxides, and any combination thereof, wherein the particulate is hydrophobically modified, would not dissolve in oil or 28% hydrochloric acid, and has a surface area in the range of 700 m2/g to 30 m2/g; and (ii) an internal aqueous phase comprising water having a pH of less than zero. A method of acidizing a treatment zone of a subterranean formation in a well includes the steps of: (A) forming a treatment fluid comprising such a composition; and (B) introducing the treatment fluid into a well, wherein the design temperature is at least 275°F. Preferably, the particulate is hydrophobically modified silica.