Method for maximum in-situ visbreaking of heavy oil
US4530401A · kind A · utility
287Cited by
8References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1982 |
| Grant date | Jul 23, 1985 |
| Priority date | — |
| Expiry date | Apr 5, 2002 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for the recovery of viscous oil from a subterranean, viscous oil-containing formation by injecting steam into the formation via at least one well at a sufficient temperature, rate, and in a sufficient amount to effect maximum visbreaking of the oil in place, terminating injection of steam and producing fluids including oil through the same well used for injecting steam. The injection-production cycle may be repeated for a plurality of cycles until the ratio of oil/water in the produced fluids is unfavorable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.