Calibration of electromagnetic measurement tool
US11112523B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 2018 |
| Grant date | Sep 7, 2021 |
| Priority date | — |
| Expiry date | Nov 8, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2003/085
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A calibration method includes determining calibration standards for a reference tool including a reference transmitter and a reference receiver. First and second calibration factors are measured to match a receiver on an electromagnetic measurement tool (the tool to be calibrated) to the reference receiver and to match a transmitter on the electromagnetic measurement tool to the reference transmitter. The electromagnetic measurement tool is deployed in a subterranean wellbore and used to make electromagnetic measurements therein. The measured first and second calibration factors and at least one of the calibration standards are applied to at least one of the electromagnetic measurements to compute a gain calibrated electromagnetic measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.