A polyhalite composition and method for enhanced recovery of oil
AssigneeIcl Europe Cooperatief U.A.
InventorsKhalil ABU-RABEAH, Meng ZHANG, Robert Jacob Herman STENEKES
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Abstract
There is provided herein a liquid solution for the recovery of oil from carbonate reservoirs comprising a solid chemical composition comprising Poly halite in a % weight range of 70 to 99.5; NaCl in a % weight range of 5 to 30; SiO2 in a % weight range of 0.1 to 5; and injected water selected from the group including sea water, diluted sea water, desalinated seawater, produced water, aquifer water, river water, surface water, fresh water, distilled water or a combination of thereof; wherein said solid chemical composition is dissolved in said injected water in an amount of 1-10 grams of said solid chemical composition per 1 liter of said injected water.
Claims8
A liquid solution for the recovery of oil from carbonate reservoirs comprising
- a solid chemical composition comprising
- Polyhalite in a % weight range of 70 to 99.5;
- NaCl in a % weight range of 5 to 30;
- SiO2 in a % weight range of 0.1 to 5;
- and
- injected water selected from the group including sea water, diluted sea water, desalinated seawater, produced water, aquifer water, river water, surface water, fresh water, distilled water or a combination of thereof;
- wherein said solid chemical composition is dissolved in said injected water in an amount of 1-10 grams of said solid chemical composition per 1 liter of said injected water.
A method for recovering oil from a carbonate reservoir comprising
- Dissolving 1-10 grams of a solid chemical composition in 1 liter of low salinity injected water comprising a TDS of 0.4% or less to yield a recovery solution;
- injecting said recovery solution to said reservoir to facilitate oil recovery;
- and
- wherein said solid chemical composition comprising
- Polyhalite in a % weight range of 70 to 99.5;
- NaCl in a % weight range of 5 to 30;
- SiO2 in a % weight range of 0.1 to 5;
Dependencies are inferred from the claim text.