Method and system for determining asphaltene onset pressure
US11946370B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | Mar 13, 2023 |
| Grant date | Apr 2, 2024 |
| Priority date | — |
| Expiry date | Mar 13, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/0092
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Asphaltene onset pressure of a formation fluid is determined by subjecting the fluid to a plurality of tests where depressurization is conducted at a different depressurization rate for each test while optically monitoring the fluid for asphaltene flocculation. The pressures at which asphaltene flocculation are detected in each test are fit to a curve as a function of depressurization rate, and the curve is extrapolated to a pressure (e.g., 0 psi) to provide the asphaltene onset pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.