Gas pre-injection for chemically enhanced oil recovery
US4287950A · kind A · utility
9Cited by
11References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1980 |
| Grant date | Sep 8, 1981 |
| Priority date | — |
| Expiry date | Apr 3, 2000 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/168
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for the chemically enhanced recovery of oil in which a gas is injected into the oil-bearing formation prior to the commencement of any surfactant flood. The pre-injection of gas allows the chemical flood to function more effectively and also permits the use of unthickened pushers and smaller surfactant banks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.