Method and system for determining asphaltene onset pressure
US11603759B2 · kind B2 · utility
0Cited by
1References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2018 |
| Grant date | Mar 14, 2023 |
| Priority date | — |
| Expiry date | Jul 4, 2039 |
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.