Drilling fluid contamination determination for downhole fluid sampling tool
US10633970B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2016 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | Aug 11, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F17/11
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed are methods and systems for determination of fluid contamination of a fluid sample from a downhole fluid sampling tool. A method may comprise obtaining a fluid sample, obtaining input parameters, wherein the input parameters comprise fluid properties obtained from measurement of the fluid sample and mud filtrate composition, obtaining initial values of iterative parameters, determining component mole fractions of the reservoir fluid using the initial values of the iterative parameters in a mole fraction distribution function, determining calculated fluid properties of the reservoir fluid using equation of state flash calculating, and repeating steps of determining component mole fractions and determining calculated fluid properties and further obtaining updated values of the iterative parameters for use in the mole fraction distribution function until a comparison of one or more of the calculated fluid properties with one or more of the input parameters is within a tolerance error.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.