Enhanced vertical resolution processing of dual-spaced density tools
US5619411A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1994 |
| Grant date | Apr 8, 1997 |
| Priority date | — |
| Expiry date | Dec 2, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The method employs standard processing techniques in order to derive and maintain raw data as well as background corrected and shop calibrated data. Specific data from standard processing is used for the Enhanced Vertical Resolution (EVR) processing. The method uses corrected and calibrated data from standard processing. This data is filtered using improved standard processing material matching filters. Density correction factors .DELTA..rho..sub.LONG (or equivalently .DELTA..rho..sub.SHORT) is calculated for the long and short detectors and used in further processing. .DELTA..rho..sub.LONG and .DELTA..rho..sub.SHORT are used to calculate the standard calibrated compensated density .rho.. Enhanced processing begins with the iterative deconvolution and filtering (or smoothing) of .DELTA..rho..sub.SHORT. The background corrected and shop calibrated short density data, calculated during standard processing, is materially matched using an improved EVR filter. Finally, an enhanced calibrated borehole compensated density .rho..sub.B is calculated. The use of the same processing methods and a strict enforcement of material matching, both for the standard and enhanced processing, insures t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.