Patent ID: 9096805
Filing Date: 2015-08-04
Classification: B01D,C10G

Abstract:
1. A method of demulsifying a complex emulsion of water and oil, wherein the oil is a crude oil, the method comprising: a) forming a demulsifier composition including one or more anhydrides in an amount between about 25% and about 50% by weight of the demulsifier composition, wherein the demulsifier composition further comprises alkoxylates and derivatives; polyglycol ethers and derivatives; amine alkoxylates and derivatives; polyamine alkoxylates and derivates; oxyalkylated amines; glycol resin esters; salts of alkylaryl sulfonic acid; dicarbamates; oxyalkylated polyols reacted with diepoxides and polycarboxylic acids; unreacted oxyalkylated polyols; unreacted oxyalkylated phenolic resins; and combinations thereof; and b) producing a complex emulsion via a steam-assisted gravity drainage process; c) injecting the demulsifier composition beneath a surface into an oil well; and d) separating the oil from the water.