Method for selective plugging of depleted channels or zones in in situ oil shale retorts
US4431055A · kind A · utility
7Cited by
18References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 23, 1981 |
| Grant date | Feb 14, 1984 |
| Priority date | — |
| Expiry date | Jun 23, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/247
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Depleted zones or channels in in situ retorts that bypass unretorted zones can be plugged selectively by contacting the depleted zones in the in situ oil shale retort with an aqueous liquid, substantially free of a formation plugging amount of a solute, to increase the resistance of the depleted zone or channel to the passage of retorting gases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.