Sulfonate blends useful for improved oil recovery
US3997451A · kind A · utility
8Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1974 |
| Grant date | Dec 14, 1976 |
| Priority date | — |
| Expiry date | Dec 23, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/938
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Improved oil recovery is realized by flooding oil-bearing subterranean formations with an aqueous mixture, preferably a micellar dispersion, comprised of at least two different petroleum sulfonates, the sulfonates have an average equivalent weight within the range of about 390-450, and have an aliphatic to aromatic proton (A/AP) ratio within the range of 4-20 moles per mole but the two sulfonates have a difference in their respective A/AP ratio of at least 2.5 moles per mole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.