Processes and systems for determining if downhole fluids are in equilibrium or non-equilibrium
US12123863B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 2021 |
| Grant date | Oct 22, 2024 |
| Priority date | — |
| Expiry date | Sep 14, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/081
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Processes and systems for determining asphaltene equilibrium between two or more downhole geographic locations are provided. In some embodiments, the process can include measuring one or more fluid properties of a plurality of fluid samples at varying downhole depths to generate a one or more downhole fluid analysis measurement data points; selecting an asphaltene diameter distribution based on prior knowledge; utilizing the asphaltene diameter distribution to fit a first set of one or more equation of state curves to the one or more downhole fluid analysis measurement data points to define a first model of fitted equation of state curves and to determine one or more posterior distributions of asphaltene diameters; and determining if the varying downhole depths are in an asphaltene equilibrium by determining whether the one or more posterior distributions of asphaltene diameters is consistent with that of asphaltenes in equilibrium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.