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US 11,993,746 B2Granted
Method of waterflooding using injection solutions containing dihydrogen phosphate
AssigneeSaudi Arabian Oil Company
InventorsMoataz Abu Al Saud, Salem Khaled Al-Shammari, Hussain Habib Al Saleem, Salah Hamad Al-Saleh, Subhash Ayirala, Ali Yousef
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Abstract
Provided are methods of increasing the production of a hydrocarbon from a subterranean formation by waterflooding with injection solutions containing dihydrogen phosphate ions.
Claims20
A method of waterflooding, comprising:
- introducing a first injection solution comprising about 400 ppm to about 1000 ppm of dihydrogen phosphate ions into a subterranean formation;
- and
- introducing a second injection solution comprising dihydrogen phosphate ions into the subterranean formation;
- wherein the second injection solution has a concentration of dihydrogen phosphate ions of about 200 ppm to about 800 ppm, and a concentration of dihydrogen phosphate ions of at least about 200 ppm less than the first injection solution;
- and
- wherein at least a portion of a hydrocarbon present in the subterranean formation is displaced.
3 more elements
A method of waterflooding, comprising:
- introducing a first injection solution comprising about 1000 ppm of dihydrogen phosphate ions into a subterranean formation;
- introducing a second injection solution comprising about 800 ppm of dihydrogen phosphate ions into the subterranean formation;
- introducing a third injection solution comprising about 600 ppm of dihydrogen phosphate ions into the subterranean formation;
- introducing a fourth injection solution comprising about 400 ppm of dihydrogen phosphate ions into the subterranean formation;
- and
- introducing a fifth injection solution comprising about 200 ppm of dihydrogen phosphate ions into the subterranean formation,
- wherein at least one of the first injection solution, the second injection solution, the third injection solution, the fourth injection solution, and the fifth injection solution displaces at least a portion of a hydrocarbon present in the subterranean formation.
4 more elements
Dependencies are inferred from the claim text.