System and methods of deriving fluid properties of downhole fluids and uncertainty thereof
US7305306B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 2005 |
| Grant date | Dec 4, 2007 |
| Priority date | — |
| Expiry date | May 19, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Methods and systems are provided for downhole analysis of formation fluids by deriving fluid properties and associated uncertainty in the predicted fluid properties based on downhole data, and generating answer products of interest based on differences in the fluid properties. Measured data are used to compute levels of contamination in downhole fluids using an oil-base mud contamination monitoring (OCM) algorithm. Fluid properties are predicted for the fluids and uncertainties in predicted fluid properties are derived. A statistical framework is provided for comparing the fluids to generate, in real-time, robust answer products relating to the formation fluids and reservoirs thereof. Systematic errors in measured data are reduced or eliminated by preferred sampling procedures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.