Method for fast measurement of the saturation and the resistivity of a porous medium
US7642774B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2008 |
| Grant date | Jan 5, 2010 |
| Priority date | — |
| Expiry date | Sep 5, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/041
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for measuring the conducting fluid saturation and the resistivity of a porous medium have application to development of underground geological formations. A solid sample is extracted from the medium and placed in a centrifugation cell, beside a second sample for limiting the capillary end effect in the first sample. The two samples are partly desaturated by subjecting them to centrifugation. The resistivity of the sample is measured by placing it in a radial-electrode resistivity measurement cell. The saturation of the sample is then determined by measuring its nuclear magnetization by means of an NMR device. Repeating this procedure for different centrifugation velocities provides resistivity and saturation pairs allowing a relationship between saturation and resistivity to be estimated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.