Radioisotope X-ray fluorescence; a rapid, precise, inexpensive method to determine bulk elemental concentrations of geologic samples for determination of porosity in hydrocarbon reservoirs

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doi: 10.1016/0009-2541(85)90129-9
Authors:Sternbach, C. A.; Friedman, Gerald M.; Tham, F. S.; Preiss, I. L.
Author Affiliations:Primary:
Rensselaer Polytech. Inst., Dep. Geol., Troy, NY, United States
Volume Title:Chemical Geology
Source:Chemical Geology, 51(3-4), p.165-174. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0009-2541
Publication Date:1985
Note:In English. 30 refs.; illus. incl. 2 tables
Summary:Monochromatic radiation from radioisotope sources irradiating 44 mg of rock powder cause X-ray fluorescence, the X-rays emitted being recorded by computer-based multi-channel analyser display programmes. Although many sources may be used to fluoresce the sample, a 109Cd radiation source fluoresces elements heavier than Ca and lighter than Mo in a single scan. Calibration of peak intensities using standards of any element between Ca and Mo enables quantitative determination of the concentration of that element. A specific application of this system is the wt.% determination (to 0.1% precision) in carbonate rocks. These data allow better understanding of geophysical well logs intended to assist in location of the porosity and hydrocarbons. Mineralogical compositions (18) of carbonate rock samples determined by XRD for three Texas oil wells are given as examples. [P.Br.]
Subjects:Cadmium; Chemical composition; Concentration; Engineering geology; Metals; Methods; Petroleum engineering; Porosity; Reservoir rocks; Samples; X-ray analysis; X-ray fluorescence; Cd-109; Elements
Abstract Numbers:86M/2762
Record ID:1986040023
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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