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3D STRUCTURE MODELING AT THE FEDERAL INSTITUTE FOR GEOSCIENCES AND NATURAL RESOURCES (BGR), GERMANY Birgit Willscher, Rolf Rdiger Ludwig, Bettina Khn THREE-DIMENSIONAL GEOLOGICAL MAPPING (Workshop) Portland, Oregon October 17, 2009 Slide 2 1 BGR and 3D modeling Geoscientific institute (subordinate agency of the Federal Ministry of Economics and Technology, BMWi) About BGR THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 Slide 3 1 BGR and 3D modeling Geoscientific institute (subordinate agency of the Federal Ministry of Economics and Technology, BMWi) Advice and information to the federal government of Germany and to German industry and research institutions About BGR THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 Slide 4 1 BGR and 3D modeling Geoscientific institute (subordinate agency of the Federal Ministry of Economics and Technology, BMWi) Advice and information to the federal government of Germany and to German industry and research institutions Technical cooperation with developing countries, international geoscientific cooperation, geoscientific research About BGR THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 Slide 5 1 BGR and 3D modeling 3D modeling THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 Our team: hydrogeological 3D structure modeling Slide 6 1 BGR and 3D modeling 3D modeling THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 Our team: hydrogeological 3D structure modeling Why 3D: 2D: just a small slice of a complex situation 3D: necessary for spatial consistency Slide 7 1 BGR and 3D modeling 3D modeling THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 Our team: hydrogeological 3D structure modeling Why 3D: 2D: just a small slice of a complex situation 3D: necessary for spatial consistency Slide 8 2 Methods Model construction principles THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 Discretion of surfaces to grids and discretion of geo-bodies to volumetric polygons - interpolation algorithms - smoothing Slide 9 2 Methods Model construction principles THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 Discretion of surfaces to grids and discretion of geo-bodies to volumetric polygons - interpolation algorithms - smoothing for heterogeneous data, irregularly distributed data, or data varying in scale time-saving + Slide 10 2 Methods Model construction principles THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 Discretion of surfaces to grids and discretion of geo-bodies to volumetric polygons - interpolation algorithms - smoothing for heterogeneous data, irregularly distributed data, or data varying in scale time-saving penetration + _ Slide 11 2 Methods Model construction principles THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 Discretion of surfaces to grids and discretion of geo-bodies to volumetric polygons - interpolation algorithms - smoothing for heterogeneous data, irregularly distributed data, or data varying in scale time-saving penetration + _ Slide 12 2 Methods Model construction principles THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 Discretion of surfaces to grids and discretion of geo-bodies to volumetric polygons - interpolation algorithms - smoothing for heterogeneous data, irregularly distributed data, or data varying in scale time-saving penetration subcrops not being in contact with surfaces + _ Slide 13 2 Methods Model construction principles THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 Discretion of surfaces to grids and discretion of geo-bodies to volumetric polygons - interpolation algorithms - smoothing for heterogeneous data, irregularly distributed data, or data varying in scale time-saving penetration subcrops not being in contact with surfaces + _ Slide 14 2 Methods Model construction principles THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 Construction of geo-bodies using input data - points or lines - TIN Slide 15 2 Methods Model construction principles THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 Construction of geo-bodies using input data - points or lines - TIN Slide 16 2 Methods Model construction principles THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 Construction of geo-bodies using input data - points or lines - TIN Slide 17 2 Methods Model construction principles THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 + Construction of geo-bodies using input data - points or lines - TIN Construction of complex features Slide 18 2 Methods Model construction principles THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 + Construction of geo-bodies using input data - points or lines - TIN Construction of complex features Slide 19 2 Methods Model construction principles THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 + Construction of geo-bodies using input data - points or lines - TIN Construction of complex features Slide 20 2 Methods THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 + Construction of geo-bodies using input data - points or lines - TIN Construction of complex features Visualisation of complex hydrogeological problems Model construction principles Slide 21 2 Methods THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 + Construction of geo-bodies using input data - points or lines - TIN Construction of complex features Visualisation of complex hydrogeological problems Model construction principles Slide 22 3 Discussion of TIN-based models For construction of complex features: - line-based, TIN - e.g. openGEO Software THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 Slide 23 3 Discussion of TIN-based models For construction of complex features: - line-based, TIN - e.g. openGEO complex features like lenses (duplication of layers) Software THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 + Slide 24 3 Discussion of TIN-based models For construction of complex features: - line-based, TIN - e.g. openGEO complex features like lenses (duplication of layers) difficult to learn AutoCAD required time-consuming Software THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 + _ Slide 25 3 Discussion of TIN-based models Software THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 For stacked layer models: - e.g. GSI3D Slide 26 3 Discussion of TIN-based models Software THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 + For stacked layer models: - e.g. GSI3D easy to learn time-saving Slide 27 3 Discussion of TIN-based models Software THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 + _ For stacked layer models: - e.g. GSI3D easy to learn time-saving not applicable for complex faulting (ramps, overthrust faults) Slide 28 4 Conclusions Application of the appropriate software and methodology Hydrogeological 3D structure modeling THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 Slide 29 4 Conclusions Application of the appropriate software and methodology Purposes of the model resources available for the project Hydrogeological 3D structure modeling THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 Slide 30 4 Conclusions Application of the appropriate software and methodology Purposes of the model resources available for the project Model construction based on expert defined cross-sections or contour maps => control during the modeling process Hydrogeological 3D structure modeling THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 Slide 31 THANK YOU FOR YOUR ATTENTION! Slide 32 2D => 3D? Software? Quality control? Discussion: THREE-DIMENSIONAL GEOLOGICAL MAPPING Portland, Oregon October 17, 2009 THANK YOU FOR YOUR ATTENTION!