Method for reducing the inert gas fraction in methane-containing gaseous mixtures obtained from underground formations
US5388641A · kind A · utility
287Cited by
12References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1993 |
| Grant date | Feb 14, 1995 |
| Priority date | — |
| Expiry date | Nov 3, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for reducing the inert gas fraction volume percent present in a methane-containing mixture produced by injecting an inert gas into a solid carbonaceous subterranean formation is disclosed. The method reduces the inert gas fraction by suspending the injection of the inert gas or by reducing a rate of injection of the inert gas. Additional methods are disclosed in which the inert gas volume percent of a gaseous mixture produced from more than one well can be maintained below the inert gas volume percent present in a gas obtained from at least one of the wells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.