Patent · US Expired

Downhole high resolution NMR spectroscopy with polarization enhancement

US7126332B2 · kind B2 · utility

65Cited by
24References
53Claims
0Family size

Assignee

Inventors

Key dates

Filing dateOct 30, 2003
Grant dateOct 24, 2006
Priority date—
Expiry dateOct 30, 2023

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01R33/5605
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

An apparatus and method is discussed for characterizing a fluid sample downhole of aliphatic hydrocarbon compounds, aromatic hydrocarbon compound, or connate mud filtrates containing carbon-13 isotopes using an enhanced nuclear magnetic resonance (NMR) signal on a measurement-while-drilling device. To enhance the carbon-13 NMR signal these nuclei are being hyperpolarized. Either the Overhauser Effect (OE) or the Nuclear Overhauser Effect or optical pumping and the Spin Polarization Induced Nuclear Overhauser Effect (SPINOE) can serve as a mechanism for hyperpolarization of the carbon-13 nuclei.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.