Spectroscopic analysis with background compensation
US4390783A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1981 |
| Grant date | Jun 28, 1983 |
| Priority date | — |
| Expiry date | Oct 2, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/102
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The composition of an earth formation is investigated by repetitively irradiating the formation with bursts of incident radiation and generating an unknown energy spectrum from radiation resulting from the interaction of the incident radiation with nuclei of the formation. A background energy spectrum is generated from radiation detected during a time interval adjacent to the interval in which the unknown energy spectrum is measured. A percentage of the background spectrum, shifted to have the best energy-versus-channel number match with that of the unknown spectrum, is then subtracted from the unknown spectrum to produce an improved, unknown spectrum substantially free of background contributions from which an improved, compensated, inelastic neutron interaction log may be generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.