Patent · US Active

Method and apparatus for determining multiscale similarity between NMR measurements and a reference well log

US8330460B2 · kind B2 · utility

0Cited by
25References
20Claims
0Family size

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Inventor

Key dates

Filing dateJul 13, 2010
Grant dateDec 11, 2012
Priority date—
Expiry dateApr 4, 2031

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01R33/50
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

Pulse sequences are applied to a fluid in an earth formation in a static magnetic field and NMR spin echo signals are obtained. The signals are processed to give a distribution of a relaxation time at a plurality of depths. Semblance between the distributions and a log of a formation property are used to identify depths at which portions of the distributions are similar to the formation property logs.

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