Method for enhancing the recovery of methane from a solid carbonaceous subterranean formation
US5417286A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1993 |
| Grant date | May 23, 1995 |
| Priority date | — |
| Expiry date | Dec 29, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/2605
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for improving the recovery of methane from a solid carbonaceous subterranean formation penetrated by a wellbore, the method comprising the steps of introducing a first fluid into the formation which sorbs to the formation, allowing at least a portion of the first fluid to sorb to the formation, introducing a chemically different second fluid into the formation at a pressure higher than the parting pressure of the formation, relieving pressure within the formation to produce shear failure within the formation, and repeating the introduction of second fluid and the relieving of pressure until a desired permeability of the formation is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.