Patent · US Active

NMR-DNA fingerprint

US8781745B2 · kind B2 · utility

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11References
17Claims
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Key dates

Filing dateAug 2, 2011
Grant dateJul 15, 2014
Priority date—
Expiry dateAug 20, 2032

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01V3/32
  • 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 relaxation time at each of the plurality of depths. A quasi-DNA is obtained by autoscaling and a nonlinear mapping of T2 component logs and non-NMR logs. Similarities between the quasi-DNA of the two types of logs are used to estimate formation lithology and fluids.

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