Rapid and simple analysis of oil-reservoir rocks by diffuse reflectance IR spectrometry

The carbonate and clay mineral contents in oil-reservoir rock samples were determined from their diffuse reflectance IR spectra. Both rapidity and simplicity are required for this method, since many samples must be treated. Rock samples were ground into fine particles and measured without dilution....

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Published inBUNSEKI KAGAKU Vol. 41; no. 11; pp. 601 - 603
Main Authors KANETA, Hidehiko, TEZUKA, Machiko, TANAKA, Shigeyuki
Format Journal Article
LanguageJapanese
English
Published Tokyo The Japan Society for Analytical Chemistry 1992
Japan Science and Technology Agency
Subjects
carbonate mineral
clay mineral
diffuse reflectance infrared spectrum
oil-reservoir rock
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Summary:The carbonate and clay mineral contents in oil-reservoir rock samples were determined from their diffuse reflectance IR spectra. Both rapidity and simplicity are required for this method, since many samples must be treated. Rock samples were ground into fine particles and measured without dilution. We used the peak-hight ratios of 2500 cm-1 (carbonate) and 3600 cm -1 (clay) to 1880 cm-1. The peak at 1880 cm -1 is characteristic of quartz. We confirmed the high reproducibility of this method by carrying out examinations with mixtures of standard mineral samples (RSDs were within 10%). The actual results for 39 rock samples showed a good correlation with those by XRD.
ISSN:0525-1931
DOI:10.2116/bunsekikagaku.41.11_601