New Methods for Modeling Laterolog Resistivity Corrections

• Autorzy: Jarzyna J. A. , Cichy A. , Drahos D. , Galsa A. , Bała M. J. , Ossowski A.

Identyfikatory

DOI

10.1515/acgeo-2016-0012

• Języki publikacji: EN

Abstrakty

EN

The paper presents methods for laterolog response modeling. In Coulomb’s charges method, Laplace’s equation is solved for the electric field distribution in rock medium with internal boundaries between different resistivity layers. There, the boundary problem is reduced to Fredholm integral equation of the second kind. The second method uses a finite element array to model apparent resistivity from laterolog. The task is treated as DC problem and the Laplace equation is solved numerically. The presented methods were applied to borehole data covering a typical stratigraphic section of the Fore-Sudetic Monocline in southwestern Poland. Apparent resistivity was calculated using the Coulomb’s charges method and alternatively modeled using a finite element method which gave similar results. Then, a series of linear corrections for borehole, shoulder bed, and filtration effects for apparent resistivity obtained by the Coulomb’s charges method demonstrated the feasibility of calculating true resistivity of virgin and invaded zones. The proposed methods provide a flexible solution in modeling which can be adapted to other logs.

Słowa kluczowe

EN

finite element modeling; laterolog response; Coulomb charges method; apparent resistivity correction

PL

modelowanie metodą elementów skończonych

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2016
• Tom: Vol. 64, no. 2
• Strony: 417--442
• Opis fizyczny: Bibliogr. 19 poz.

Twórcy

autor

Jarzyna J. A.

• AGH University of Science and Technology, Faculty of Geology, Geophysics and Environment Protection, Kraków, Poland

autor

Cichy A.

• AGH University of Science and Technology, Faculty of Geology, Geophysics and Environment Protection, Kraków, Poland

autor

Drahos D.

• Eötvös Loránd University, Department of Geophysics and Space Sciences, Budapest, Hungary

autor

Galsa A.

• Eötvös Loránd University, Department of Geophysics and Space Sciences, Budapest, Hungary

autor

Bała M. J.

• AGH University of Science and Technology, Faculty of Geology, Geophysics and Environment Protection, Kraków, Poland

autor

Ossowski A.

• AGH University of Science and Technology, Faculty of Geology, Geophysics and Environment Protection, Kraków, Poland

Bibliografia

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę