Method for detecting gas influx in wellbores and its application to identifying gas bearing formations
US8077545B2 · kind B2 · utility
1Cited by
2References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 27, 2008 |
| Grant date | Dec 13, 2011 |
| Priority date | — |
| Expiry date | Jun 25, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/107
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for identifying gas in a wellbore includes imparting acoustic energy into the wellbore at a first selected position and detecting the acoustic energy at a second position in the wellbore spaced apart from the first position. Acoustic velocity of fluid in the wellbore from the detected acoustic energy. Presence of gas in the fluid is determined from the velocity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.