Pad alignment with a multi-frequency-band and multi-window semblance processing
US10989832B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2019 |
| Grant date | Apr 27, 2021 |
| Priority date | — |
| Expiry date | Sep 9, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and system for pad alignment may comprise disposing a downhole tool into a borehole, taking a measurement with the electrode with at least one operating frequency, correcting the measurement to account for local formation dip, constructing a window with a predetermined size H, identifying a number of adaptive filters to be utilized, extracting one or more frequency components from the measurement with the adaptive filters, identifying a semblance value of a reference dataset and a target dataset, assembling the semblance values for the reference dataset and the target dataset, identifying the semblance values of the reference dataset and target datasets over the range of relative pad shifts, identifying a pad shift, and forming one or more images of the pad shirt or the semblance of the reference dataset and target data set. The system may comprise a mandrel, one or more pads, and electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.