Patent · US Active

Automatic dip picking from wellbore azimuthal image logs

US9366135B2 · kind B2 · utility

1Cited by
64References
15Claims
0Family size

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Key dates

Filing dateAug 29, 2014
Grant dateJun 14, 2016
Priority date—
Expiry dateAug 29, 2034

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01V1/50
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

Method for automatically determining a planar event such as a bedding plane from azimuthal wellbore log data (501). The image log may optionally first be filtered using a smoothing filter (502). Then, the image log is inputted to a gradient (first-derivative) filter (503). The image log is also used to find the optimal local sinusoidal trend (or orientation) on the image by determining the best sine wave at each depth among all azimuthal curves from the image using a minimum-variance method (504). Finally, bed boundaries are located based on highest contrast (506) calculated along the sinusoidal lines on the gradient image (505).

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