Method for enhanced oil recovery through a horizontal production well in a subsurface formation by in-situ combustion
US5211230A · kind A · utility
317Cited by
16References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1992 |
| Grant date | May 18, 1993 |
| Priority date | — |
| Expiry date | Feb 21, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/305
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A horizontal production well is located in the lower portion of a heavy viscous oil-bearing reservoir. A vertical injection well is located in the upper portion of the reservoir. Oxygen-enriched gas is injected down the injector well and ignited in the upper portion of the reservoir to create a combustion zone that reduces viscosity of oil in the reservoir as the combustion zone advances downwardly toward the horizontal production well, the reduced-viscosity oil draining into the horizontal production well under force of gravity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.