Method for determining the presence of platinum in earth formations
US4463256A · kind A · utility
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2References
12Claims
0Family size
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Key dates
| Filing date | Oct 15, 1982 |
| Grant date | Jul 31, 1984 |
| Priority date | — |
| Expiry date | Oct 15, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A spectral natural gamma radiation logging tool is calibrated with a material of known potassium content so that the natural gamma radiation measured by such logging tool is related to potassium concentration. The earth formations surrounding a borehole are logged with such logging tool to identify the presence of potassium. A specified concentration of potassium correlates inversely with a magnetic mineral content in the earth formation. The amount of magnetic mineral content is a measure of the presence of the non-magnetic mineral platinum in the earth formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.