rudyabo Posted September 4, 2017 Share Posted September 4, 2017 Dear Rockworks technical team, I'm going to use Rockworks 17 to construct 3D stratigraphic model determined generally by 3 main layers from the top to base as follows: Quaternary/ alluvium Neogene/ Limestone Paleogene/ Clayey Limestone Grid and model dimensions are: 100 x 100 x 5 The Quaternary sediments fill the depressions of the model. Modeling option: -Inverse Distance was selected as interpolation algorithm with additional options, including Decluster (Average), Smooth (2x2), Faulted (2D Fault). -Modeling Sequence Base-to-Top (Onlap) -Constraining Surface: Truncate Units above ground surface/ Replace top surface with ground surface -Hide thin Zones: 0.005 Problem: After successful running the interpolation, the Quaternary sediment extends over the whole region despite no Quaternary deposits are recorded in the boreholes. I tried to increase the model resolution, playing with cutoff value, using different interpolation algorithms.. but nothing is changed. (Please have a look on the screenshot) any suggestions to bypass this issue? thanks, Rudy Link to comment Share on other sites More sharing options...
rudyabo Posted September 5, 2017 Author Share Posted September 5, 2017 Hi Tom, thank you so much for your quick response. I would try the second option which seems more reasonable (giving zero thicknesses). Unfortunately, polygon clipping option requires a lot of post-processing and time for smoothing grids. I think the most challenging issue in Rockworks is how to replicate complex stratigraphic succession. So it would be so appreciated when Rockware put Stratigraphic package on the subsequent development plan. I'll tell you about the results. Thanks Link to comment Share on other sites More sharing options...
rudyabo Posted September 6, 2017 Author Share Posted September 6, 2017 Dear Tom, Unfortunately, results of zero-thickness option didn't provide good results (almost no changes). I increased the cutoff to 1, 20% maximum interpolation distance. The interpolation continues trends for the Quaternary deposits! For each borehole I inserted new stratigraphic formation belongs to the Quaternary as follows: Depth to Top Depth to Base Formation 1 0 0 Quaternary 2 0 50 Neogene 3 50 100 Aquitanian 4 100 200 Paleogene The depths measured from the elevation. please any advice? thanks, Rudy Link to comment Share on other sites More sharing options...
rudyabo Posted September 6, 2017 Author Share Posted September 6, 2017 I'm wondering if the difference between the borehole Z elevation and the DEM could cause such problem! By the way, how to snap them to the topographic surface? Link to comment Share on other sites More sharing options...
rudyabo Posted September 6, 2017 Author Share Posted September 6, 2017 Hi Tom, Thanks for your support. In the southeastern corner, the yellow Neogene deposits pinched out of the Paleogene formation once I activate the maximum interpolation distance to 20%. However, I tired with 5 and 10%, but the result was a clustered small circles surrounding boreholes. I'll try to snap all boreholes to the surface grid elevation and see if it can solve the problem. I will send you a copy if it doesn't work. Sincerely, Rudy Link to comment Share on other sites More sharing options...
rudyabo Posted September 6, 2017 Author Share Posted September 6, 2017 Dear Tom, No changes after snapping wells to surface topography, I uploaded a backup of the project as requested (File name: Backup_Rudy.rar). I also enclosed the shape files represent the real Quaternary and Neogene boundaries. Best Regards, Rudy Link to comment Share on other sites More sharing options...
rudyabo Posted September 8, 2017 Author Share Posted September 8, 2017 Dear Tom, thank you so much for your help. I've just few questions: 1. Should I deactivate the option/ replace top suface with ground surface? 2. Do you construct the Quaternary top and bottom based on boreholes elevation? 3. Could you please provide me with the your modified version of the project for comparison purpose. please accept my sincere appreciation. Rudy Link to comment Share on other sites More sharing options...
rudyabo Posted September 12, 2017 Author Share Posted September 12, 2017 Dear Tom, thanks for your support. I finished the model yesterday and I pleased to share you the result I don't know why " There was a problem processing the uploaded file. Please contact us for assistance " Actually, I based on the tools: Raster calculation, Polygon clip, and substitute surface (for the Neogene and Paleogene). Regards, Rudy Link to comment Share on other sites More sharing options...
rudyabo Posted September 12, 2017 Author Share Posted September 12, 2017 Hi Tom, thanks! I will try to improve it further, but why I cannot upload a screenshot here are there any size limitation for each topic? thanks Link to comment Share on other sites More sharing options...
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