Composition effective in removing asphaltenes
AssigneeAGIP S.p.A.
InventorsAlberto Delbianco, Fabrizio Stroppa
Life of this patent
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Abstract
Process for the dissolution of asphaltene sediments in oil wells which consists in introducing a solubilizing composition for the above asphaltenes into the oil wells, characterized in that the solubilizing composition comprises: (a) a basically hydrocarbon fraction consisting of at least 70%, preferably at least 80% by weight, of aromatic and alkyl aromatic hydrocarbons, the alkyl group being from C.sub.1 to C.sub.4 ; (b) a fraction basically consisting of quinoline and isoquinoline as such or alkyl substituted, preferably as such, the alkyl group being from C.sub.1 to C.sub.4 ; the weight ratio between fraction (a) and (b) being from 97.5/2.5 to 75/25, preferably from 97/3 to 90/10.
Claims8
A process for the dissolution of asphaltene formations of oil wells which consists in introducing a solubilizing composition for the above asphaltenes into the oil wells, characterized in that the solubilizing composition comprises:
- (a) a basically hydrocarbon fraction consisting of at least 70%, of aromatic and alkyl aromatic hydrocarbons, the alkyl group being from C.sub.1 to C.sub.4 ;
- (b) a fraction basically consisting of quinoline and isoquinoline as such or alkyl substituted, the alkyl group being from C.sub.1 to C.sub.4 ;
- the weight ratio between fraction (a) and (b) being from 97.5/2.5 to 75/25.
Dependencies are inferred from the claim text.