Method of downhole characterization of formation fluids, measurement controller for downhole characterization of formation fluids, and apparatus for downhole characterization of formation fluids
US7788972B2 · kind B2 · utility
23Cited by
51References
9Claims
0Family size
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Key dates
| Filing date | Sep 20, 2007 |
| Grant date | Sep 7, 2010 |
| Priority date | — |
| Expiry date | Jun 7, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/0875
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of downhole characterization of formation fluids is provided. The method includes: estimating a rough value of the bubble point pressure of the formation fluids; depressurizing the formation fluids at a first speed to a certain pressure which is a predetermined value higher than the estimated rough value while the formation fluids are isolated in a portion of the flowline; and depressurizing the isolated fluids at a second speed which is slower than the first speed in order to measure a precise value of the bubble point pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.