Method for recovering oil from an underground formation
US4364431A · kind A · utility
17Cited by
6References
4Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 17, 1980 |
| Grant date | Dec 21, 1982 |
| Priority date | — |
| Expiry date | Dec 17, 2000 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/20
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Method for recovering oil from an underground formation consisting of blocks of relatively low permeability with an oil-wet pore space containing oil surrounded by a fracture network of relatively high permeability by supplying to the fracture network an aqueous solution of a surfactant adapted for decreasing the surface tension between water and oil and displacing the oil from the oil-wet pore space of the blocks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.