Recovery of methane from solid carbonaceous subterranean formations
US5099921A · kind A · utility
25Cited by
10References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1991 |
| Grant date | Mar 31, 1992 |
| Priority date | — |
| Expiry date | Feb 11, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/40
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of recovering methane from a solid carbonaceous subterranean formation by injecting a fluid that desorbs methane through at least one injection well into a subterranean formation and recovering desorbed methane through at least one production well. The initial rate of injection of the desorbing fluid can be increased without exceeding formation pressure limitations by injecting a preflush fluid having a desorbing efficiency less than a desorbing efficiency of the first fluid. This increase in injection of the desorbing fluid results in an increase in the recovery rate of methane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.