Method for the tertiary recovery of petroleum by flooding with hot water and an aqueous alkaline solution
AssigneeWintershall Aktiengesellschaft
InventorsWalther Schulz, Wilhelm Gebetsberger
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Abstract
A method for the recovery of crude petroleum from mineral oil deposits, utilizing hot water flooding or alkali containing hot water flooding is described.
Claims9
A method for the tertiary recovery of petroleum by hot water flooding or flooding with alkaline, water-soluble materials in the deposits, which, after the hot water flooding into the deposit heated by hot water, is comprised by admitting an aqueous soda lye solution at ambient temperature as the flooding agent into the deposit heated by the hot water, and adjusting the upper temperature limit of said deposit to such a degree that the resulting emulsion formed from the petroleum with the soda lye remains practically stable.
Dependencies are inferred from the claim text.