Sequentially flooding a subterranean hydrocarbon-bearing formation with a repeating cycle of immiscible displacement gases
US5232049A · kind A · utility
13Cited by
20References
17Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 27, 1992 |
| Grant date | Aug 3, 1993 |
| Priority date | — |
| Expiry date | Mar 27, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/58
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process is provided for recovering liquid hydrocarbons from a subterranean hydrocarbon-bearing formation by sequential injection of a pair of immiscible gases of differing composition which displace the liquid hydrocarbons from the formation. The compositions of the displacement gases are selected such that one gas is characterized as a swelling gas and the other is characterized as a non-swelling gas with respect to the liquid hydrocarbons in place.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.