Determination of fluid-phase-specific petrophysical properties of geological core for oil, water and gas phases
US11921069B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2021 |
| Grant date | Mar 5, 2024 |
| Priority date | — |
| Expiry date | Oct 24, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The following invention is used for determining the relative permeability of a fluid in a rock for three different phases: water, oil, and gas, in both conventional and unconventional formations. The permeability of a phase describes how much it can flow in porous media given a pressure gradient and is useful in evaluating reservoir quality and productivity. The following invention is a method to determine the three-phase relative permeabilities in both conventional and unconventional formations using NMR restricted diffusion measurements on core with NMR-active nuclei, combined with centrifugation of the core. In addition, the tortuosity, pore size (surface-to-volume ratio), fluid-filled porosity, and permeability is determined for each of the three phases in a rock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.