Method for permeable zone detection
US8553493B2 · kind B2 · utility
9Cited by
8References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2007 |
| Grant date | Oct 8, 2013 |
| Priority date | — |
| Expiry date | Jan 13, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/50
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for estimating formation permeability from measured sonic wave Stoneley attributes and particularly the Stoneley attributes of slowness (DTst) and attenuation (ATTst), taking into consideration the existence of a heavy walled drill collar at the end of the drill string and the relative lack of borehole mud cake during a drilling operation. In the subject LWD application a real-time qualitative indication for fracture and permeable zones is estimated from Stoneley measurements. This information is useful to a driller to make important timely decisions about drilling and completion programs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.