ALUMINUM SULPHONATE SALT FOR CONTROLLED RELEASE OF SURFACTANTS IN AN ENHANCED OIL RECOVERY PROCESS

摘要

A controlled release composition comprising an aqueous sulfonate solution; an anionic surfactant; and a salt selected from aluminium nitrate nanohydrate, calcium chloride dehydrate, magnesium chloride hexahydrate, cobalt chloride hexahydrate, and other metal salts. Methods of delivering a controlled release of surfactants composition, the method comprising the steps of: delivering a solution into a reservoir, the solution comprising an aqueous sulfonate solution; an anionic surfactant; and a salt selected from aluminium nitrate nanohydrate, calcium chloride dehydrate, magnesium chloride hexahydrate, cobalt chloride hexahydrate, and other metal salts; and delivering water to the reservoir.