Method for estimating lithological fractions using nuclear spectroscopy measurements
US5786595A · kind A · utility
23Cited by
7References
15Claims
0Family size
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Key dates
| Filing date | Mar 29, 1996 |
| Grant date | Jul 28, 1998 |
| Priority date | — |
| Expiry date | Mar 29, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/101
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for determining total clay content of an earth formation based on elemental concentration logs obtained from a logging tool. This method avoids the need for obtaining an aluminum concentration measurement. First, the concentrations of a plurality of elements in the formation are determined without measuring an aluminum concentration. Then, at least the silicon, calcium, and iron concentrations are combined in accordance with a function determined by regression analysis to produce an estimate of the total clay content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.