Method for laboratory measurement of capillary pressure in reservoir rock
US6178807A · kind A · utility
24Cited by
9References
7Claims
0Family size
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Key dates
| Filing date | Mar 25, 1998 |
| Grant date | Jan 30, 2001 |
| Priority date | — |
| Expiry date | Mar 25, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N15/082
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An effective laboratory method for developing complete capillary pressure curves involves directly measuring an oil/water saturation profile within a cylindrical porous rock core plug. The saturation profile, which includes a free water level, is established under a known pressure gradient induced by centrifuging and is measured using image mapping techniques. The free-water level is established at a desired position within the length of the core plug and provides a reference position of zero capillary pressure to facilitate measurement of both positive and negative capillary pressures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.