Flow regime identification with filtrate contamination monitoring
US10577928B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2015 |
| Grant date | Mar 3, 2020 |
| Priority date | — |
| Expiry date | Apr 12, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/0875
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method includes operating a downhole acquisition tool in a wellbore in a geological formation. The wellbore or the geological formation, or both contains a fluid that includes a native reservoir fluid of the geological formation and a contaminant. The method also includes receiving a portion of the fluid into the downhole acquisition tool, measuring a fluid property of the portion of the fluid using the downhole acquisition tool, and using the processor to estimate a fluid property of the native reservoir fluid based on the measured fluid property of the portion of the fluid and a regression model that may predict an asymptote of a growth curve. The asymptote corresponds to the estimated fluid property of the native formation fluid, and the regression model includes a geometric fitting model other than a power-law model.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.