System and method for estimating formation characteristics in a well
US8736263B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 24, 2008 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Sep 25, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/4808
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A technique utilizes the acquisition of data via nuclear magnetic resonance at multiple depths of investigation in a well region. The acquired data is processed to estimate variable fluid mixture densities at different radial depths. The variable fluid mixture densities and a radial response from a density tool, for example, can be used to calculate an effective fluid mixture density and used to interpret density logs. Other logs such as neutron log, induction resistivity log, and dielectric permittivity log can be combined with NMR. For these tools a corresponding effective formation property can be calculated and used to determine other formation characteristics, such as total porosity, total density, dielectric permittivity, electric resistivity, and formation characteristics derivable from these.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.