Method for impulse stimulation of oil and gas well production
US8082989B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2010 |
| Grant date | Dec 27, 2011 |
| Priority date | — |
| Expiry date | Dec 23, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/26
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for improving liquid injection into a rock formation. The method includes the steps of introducing a gas impulse device into a wellbore in the formation and pumping a pressurized liquid into the wellbore. The method also includes firing the gas impulse device periodically so that the device generates impulses of high pressure compressed gas. The gas expands through the pumped pressurized liquid substantially instantaneously increasing the liquid flow rate into the rock formation, and creates rapid cyclical injected liquid surges into the rock formation with liquid oscillation occurring inside the fractures and/or pores of the formation. The method may be used in regular oil production applications, waterflooding of wells that have ceased to be productive, in preventing lost circulation in oil wells, and in injecting hazardous wastes into rock formations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.