Optimized method for determining physical parameters of a sample subjected to centrifugation
US6490531B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2000 |
| Grant date | Dec 3, 2002 |
| Priority date | — |
| Expiry date | Sep 30, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/0853
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for faster determination of physical parameters (capillary pressure curves and relative permeabilities for example) of a geologic sample initially saturated with a first fluid placed in a vessel and subjected to centrifugation in the presence of a second fluid. The equilibrium saturations are determined before complete stabilization is reached through analytic modelling involving exponential functions, best adjusting to an effective production curve, for each speed stage. A database, obtained by means of various simulations, is used to obtain the relative permeability curves corresponding to the centrifuged sample. The method can be applied for measurement of petrophysical characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.