Methane production from carbonaceous subterranean formations
US5014785A · kind A · utility
111Cited by
11References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1989 |
| Grant date | May 14, 1991 |
| Priority date | — |
| Expiry date | Aug 8, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/40
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of producing methane by injecting inert gas, such as nitrogen, through an injection well into a solid carbonaceous subterranean formation (e.g., coal) and recovering methane from a production well(s). Methane desorption is achieved by reduction in methane partial pressure rather than by reduction in total pressure alone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.