In situ recovery of shale oil
US4423907A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 19, 1977 |
| Grant date | Jan 3, 1984 |
| Priority date | — |
| Expiry date | Sep 19, 1997 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C41/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An in situ oil shale retort is formed in a subterranean formation containing oil shale and having horizontal cleavage planes extending parallel to the bedding of the formation and approximately orthogonal vertical cleavage plane sets extending perpendicular to the horizontal cleavage planes. The in situ retort is formed by excavating an opening or void in a retort site in the formation and placing explosive in the formation adjacent the void such that the explosive can fracture formation along the vertical cleavage planes and expand remaining formation within the retort site toward the void, forming a fragmented permeable mass of formation particles containing oil shale within the retort site.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.