Indirect thermal stimulation of production wells
US4274487A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1979 |
| Grant date | Jun 23, 1981 |
| Priority date | — |
| Expiry date | Jan 11, 1999 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A well which is to produce from a heavy oil or tar sands reservoir is thermally stimulated from another well located on the order of 10 to 50 feet away. This adjacent thermal stimulation well can be considered expendable. This thermal stimulation is continued for a number of days, until the hot zone produced extends beyond the location of the production well. Thereafter, the adjacent thermal stimulation well preferably is closed off during the course of the frontal thermal drive or the like from remote injection wells. However, such stimulation may be repeated later of if the oil or tar becomes too viscous in the pay zone near the production well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.