Apparatus and methods for estimating downhole fluid compositions
US8248067B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 2, 2009 |
| Grant date | Aug 21, 2012 |
| Priority date | — |
| Expiry date | May 2, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/448
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method for estimating a property of a species of the hydrocarbon in a downhole fluid are provided. In one aspect, the method may include: imparting a magnetic field on the fluid to align nuclei of the fluid with a direction of the primary magnetic field; imparting a perturbing radio frequency signal on the fluid to excite the nuclei of the fluid; detecting a radio frequency signal emitted by the excited nuclei of the fluid; estimating a frequency shift between the perturbing radio frequency and the detected radio frequency; and estimating using the frequency shift a property of one or more species of the hydrocarbons in the fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.