Journal : Acta Geophysica
Article : Influences of Al, Mg, and K on Calculating Concentrations of Other Formation Elements and Their Corrections in Geochemical Logging

Authors :
Namvaran, M.
Kerman Graduate University of Technology, Geophysics Department, Kerman, Iran, m.namvaran@kgut.ac.ir,
Negarestni, A.
Kerman Graduate University of Technology, Electrical Engineering Department, Kerman, Iran, a.negarestani@kgut.ac.ir,
Grad, M.
Institute of Geophysics, Faculty of Physics, University of Warsaw, Warsaw, Poland, mgrad@mimuw.edu.pl,
Polkowski, M.
Institute of Geophysics, Faculty of Physics, University of Warsaw, Warsaw, Poland,
Wilde-Piórko, M.
Institute of Geophysics, Faculty of Physics, University of Warsaw, Warsaw, Poland,
Suchcicki, J.
Institute of Geophysics, Polish Academy of Sciences, Warsaw, Poland,
Arant, T.
Institute of Geophysics, Polish Academy of Sciences, Warsaw, Poland,
Teisseyre, R.
Institute of Geophysics, Polish Academy of Sciences, Warszawa, Poland, rt@igf.edu.pl,
Moilanen, J.
Lomonosov Moscow State University, Moscow, Russia, moilanen@mail.ru,
Pushkarev, P.Yu.
Lomonosov Moscow State University, Moscow, Russia, pavel_pushkarev@list.ru,
Sas, W.
Faculty of Civil- and Environmental Engineering, Warsaw University of Life Sciences (SGGW), Warsaw, Poland, wojciech_sas@sggw.pl,
Gabryś, K.
Faculty of Civil- and Environmental Engineering, Warsaw University of Life Sciences (SGGW), Warsaw, Poland, katarzyna_gabrys@sggw.pl,
Szymański, A.
Faculty of Civil- and Environmental Engineering, Warsaw University of Life Sciences (SGGW), Warsaw, Poland, ajozy_szymanski@sggw.pl,
Oliviera, S. D. S.
Faculty of Geophysics, Federal University of Para, Belem, Brazil; Faculty of Meteorology, Federal University of Para, Belem, Brazil , frasol@ufpa.br,
Figueredo, J. J. S.
Geoprocessados, Virlemosa, Mexico, lucas.batista.freitas@gmail.com,
Li, Ch.
School of Computer Engineering and Science, Shanghai University, Shanghai, China,
Dai, Y.
School of Computer Engineering and Science, Shanghai University, Shanghai, China,
Zhao, J.
School of Computer Engineering and Science, Shanghai University, Shanghai, China,
Zhou, S.
School of Computer Engineering and Science, Shanghai University, Shanghai, China,
Yin, J.
School of Computer Engineering and Science, Shanghai University, Shanghai, China,
Xue, D.
School of Computer Engineering and Science, Shanghai University, Shanghai, China,
Wu, W.
State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing, China, wwsheng@cup.edu.cn,
Niu, W.
State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing, China,
Tong, D.
Daqing Drilling Corporation, PetroChina, Daqing, China,
Luo, L.
CCDC Well Logging Company, Chongqing, China,
Abstract : In geochemical logging, the standard capture gamma-ray spectra of Al, Mg, and K have no distinct characteristic energy peaks. This feature easily influences the spectral bands of characteristic peaks of other elements and thus affects the accuracy of calculating their concentrations. To study this influence, we constructed a model formation containing Al, Mg, and K, and employed the Monte Carlo N Particle Transport Code (MCNP) program to simulate their capture spectra. The results indicate that the calculated dry weights of Si are almost free from the influences of Mg, K, and Al. The ones of Ca and Fe are influenced, but only to a minor extent. The dry weight of S is concurrently influenced. Specifically, the K concentration causes S concentration to deviate significantly from its real concentration. By correcting for such influences, we can obtain relatively accurate values. Data processing for a real well validates the finding that Mg, Al, and K in the formation influence the precision of calculation of other elements and also testifies to the effectiveness of the correction method.

Keywords : geochemical elemental logging, spectral stripping, elemental concentration,
Publishing house : Instytut Geofizyki PAN
Publication date : 2015
Number : Vol. 63, no. 2
Page : 451 – 467

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DOI :
Qute : Namvaran, M. ,Negarestni, A. ,Grad, M. ,Polkowski, M. ,Wilde-Piórko, M. ,Suchcicki, J. ,Arant, T. ,Teisseyre, R. ,Moilanen, J. ,Pushkarev, P.Yu. ,Sas, W. ,Gabryś, K. ,Szymański, A. ,Oliviera, S. D. S. ,Figueredo, J. J. S. ,Li, Ch. ,Dai, Y. ,Zhao, J. ,Zhou, S. ,Yin, J. ,Xue, D. ,Wu, W. ,Niu, W. ,Tong, D. ,Luo, L. ,Luo, L. , Influences of Al, Mg, and K on Calculating Concentrations of Other Formation Elements and Their Corrections in Geochemical Logging. Acta Geophysica Vol. 63, no. 2/2015
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