Compositions and methods of using same are described for negating
asphaltene deposition in a formation, wellbore, near wellbore region, and
production tubing. Compositions of the invention comprise an asphaltene
solvent and a viscosity reducing agent, the asphaltene solvent and
viscosity reducing agent present in a ratio so as to substantially reduce
viscosity of an asphaltene-containing material while substantially
negating deposition of asphaltenes either in a reservoir, in production
tubing, or both when mixed or otherwise contacting the
asphaltene-containing material. Methods of the invention comprise forcing
a composition comprising an asphaltene solvent and a viscosity reducing
agent to contact an asphaltene-containing hydrocarbon in an underground
geologic formation, and producing from the formation a production
composition comprising at least some of the treatment composition and at
least some of the asphaltene-containing hydrocarbon under conditions
sufficient to substantially negate deposition of asphaltenes in the
formation.