Fluid density from downhole optical measurements
US8434356B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2009 |
| Grant date | May 7, 2013 |
| Priority date | — |
| Expiry date | Aug 12, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/0875
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system and method for determining at least one fluid characteristic of a downhole fluid sample using a downhole tool are provided. In one example, the method includes performing a calibration process that correlates optical and density sensor measurements of a fluid sample in a downhole tool at a plurality of pressures. The calibration process is performed while the fluid sample is not being agitated. At least one unknown value of a density calculation is determined based on the correlated optical sensor measurements and density sensor measurements. A second optical sensor measurement of the fluid sample is obtained while the fluid sample is being agitated. A density of the fluid sample is calculated based on the second optical sensor measurement and the at least one unknown value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.