PRELIMINARY RESULTS ON 3D GEOLOGIC MAP OF SLOVAKIA A Case Study on - - PowerPoint PPT Presentation

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PRELIMINARY RESULTS ON 3D GEOLOGIC MAP OF SLOVAKIA

Ladislav, VIZI; Marián, ZLOCHA; Balász, KRONOME; Martin, SUROVÝ; Jana, FRIČOVSKÁ; Branislav, FRIČOVSKÝ; Martin, SUROVÝ; Róbert CIBUĽA

A Case Study on Using the Moving Geostatistics

5th European Meeting on 3D Geological Modelling, Bern, May 22nd – 24th 2019

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5th European Meeting on 3D Geological Modelling, Bern, May 22nd – 24th 2019

Mgo content [%] within magnesite deposit CaO content [%] conditioned by rock type model Water saturation distribution conditioned by lithofacial model Geometry and gross volumetric of an underground gas storage

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Plančár, J., Ibrmajer, J., Fusán, O. (1985) MAP OF PRE-TERTIARY BASEMENT RELIEF IN INNER WEST CARPATHIANS, 1:500 000. Štátny geologický ústav Dionýza Štúra, Bratislava.

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5th European Meeting on 3D Geological Modelling, Bern, May 22nd – 24th 2019

Introduction

global vs local approach

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5th European Meeting on 3D Geological Modelling, Bern, May 22nd – 24th 2019

Input data

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Variography

5th European Meeting on 3D Geological Modelling, Bern, May 22nd – 24th 2019

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Global approach – anisotropic variogram model

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5th European Meeting on 3D Geological Modelling, Bern, May 22nd – 24th 2019

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Global approach – anisotropic variogram model

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5th European Meeting on 3D Geological Modelling, Bern, May 22nd – 24th 2019

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Global approach – anisotropic variogram model

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5th European Meeting on 3D Geological Modelling, Bern, May 22nd – 24th 2019

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Global approach – isotropic variogram model, ...

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5th European Meeting on 3D Geological Modelling, Bern, May 22nd – 24th 2019

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Global approach – isotropic variogram model, ...

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5th European Meeting on 3D Geological Modelling, Bern, May 22nd – 24th 2019

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Global approach – ???...

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5th European Meeting on 3D Geological Modelling, Bern, May 22nd – 24th 2019

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Local variography

5th European Meeting on 3D Geological Modelling, Bern, May 22nd – 24th 2019

DB ESB

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Searching for solution

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Kobulský, J., Gazdačko, Ľ., Grecula, P., Hojnoš, M., Kandrík, M., Kováčik, M., Németh, Z., Pramuka, S., Radvanec, M., Szalaiová, V., Tréger, M. (2001) Atlas of Geological Maps of the Spiš- Gemer Ore Mts. – Final report. State Geological Institute of Dionýz Štúr. Bratislava.

5th European Meeting on 3D Geological Modelling, Bern, May 22nd – 24th 2019

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Magneron, C., Jeannee, N., Le Moine, O., Bourillet, J.-F. (2010) Integrating Prior Knowledge and Locally Varying Parameters with Moving-GeoStatistics: Methodology and Application to Bathymetric Mapping, In: Atkinson, P.M., Lloyd, Ch.D. (eds.) 7th International Conference on Geostatistics for Environmental Applications, Southampton, UK, September, Springer, pp. 405–415.

Searching for solution

5th European Meeting on 3D Geological Modelling, Bern, May 22nd – 24th 2019

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. . . .

AME(N50)

AME(N55)

true estimated error z1 z1

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true estimated error z1 z1

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Methodology

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z3 z4 z5 z7 z11 z9 z8 z10 true estimated error z1 z1

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AME(N135)

• dir. N45
• dir. N50
• dir. N55
• dir. N135

AME(N45)

• based on cross-validation procedure
• coarse grid 10x10 km
• locally varying anisotropy:
• from NE-SW to NW-SE
• step 5 degrees
• 18 C-V score per cell

5th European Meeting on 3D Geological Modelling, Bern, May 22nd – 24th 2019

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Local approach – rotation of anisotropy ellipse

5th European Meeting on 3D Geological Modelling, Bern, May 22nd – 24th 2019

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Comparison of the results

B.

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Differences between global and local approach

[m]

5th European Meeting on 3D Geological Modelling, Bern, May 22nd – 24th 2019

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Conclusions

• Moving geostatistics methodology is very useful in cases of complex structural patterns

as soon as the target area becomes large (national or regional models) or density of data becomes very high.

• The impact of the local anisotropies for modelling of pre-Tertiary relief is obvious.
• Moving geostatistics has proved to be useful methodology for our project (at least for

the upper part of model ).

• There is still a space for another optimising of parameters.

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Future work

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Thank you for your attention

Ladislav VIZI

(ladislav.vizi@geology.sk; laco.vizi@gmail.com)

5th European Meeting on 3D Geological Modelling, Bern, May 22nd – 24th 2019

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