create stratigraphic hierarchy
create stratigraphic hierarchy The create stratigraphic hierarchy module reads a special input file format called a pgf file, and then allows the user to build geologic surfaces based on the input file’s geologic surface intersections. This process is carried out visually (in the EVS viewer) with the use of the create stratigraphic hierarchy user interface. The surface hierarchy can either be generated automatically for simple geology models or for every layer for complex models. When the user is finished creating surfaces the gmf file can be finalized and converted into a *.GEO file.
horizons to 3d The horizons to 3d module creates 3-dimensional solid layers from the 2-dimensional surfaces produced by gridding and horizons, to allow visualizations of the geologic layering of a system. It accomplishes this by creating a user specified distribution of nodes in the Z dimension between the top and bottom surfaces of each geologic layer.
horizons_to_3d_structured The horizons_to_3d_structured module creates 3-dimensional solid layers from the 2-dimensional surfaces produced by gridding and horizons, to allow visualizations of the geologic layering of a system. It accomplishes this by creating a user specified distribution of nodes in the Z dimension between the top and bottom surfaces of each geologic layer. This module is similar to horizons to 3d, but does not duplicate nodes at the layer boundaries and therefore the model it creates cannot be exploded into individual layers. However, this module has the advantage that its output is substantially more memory efficient and can be used with modules like crop_and_downsize or ortho_slice.
layer from horizon The layer from horizon module will create a single geo layer based upon an existing surface and a constant elevation value. The Surface Defines option will allow the user to set whether the selected surface defines the top or the bottom of the layer. For example if the Top Of Layer is chosen the selected surface will define the top, while the Constant Elevation for Layer will define the bottom of the layer. The ‘Material Name / Number’ will define the geologic layer name and number for the newly created layer.
surface from horizons This module allows visualization of the topology of any single surface. surface from horizons can explode the geologic surface analogous to how explode_and_scale explodes layers created by horizons to 3d or 3d estimation. The ability to explode the surface is integral to this module. surface from horizons also allows the user to either color the surface according to the surface Elevation or any other data component exported by gridding and horizons.
surfaces from horizons The surfaces from horizons module provides complete control of displaying, scaling and exploding one or more geologic surfaces from the set of surfaces output by gridding and horizons. This module allows visualization of the topology of any or all surfaces and\or the interaction of a set of individual surfaces. surfaces from horizons can explode geologic surfaces analogous to how explode_and_scale explodes layers created by horizons to 3d or 3d estimation. The ability to explode the surfaces is integral to this module.
lithologic modeling lithologic modeling is an alternative geologic modeling concept that uses geostatistics to assign each cell’s lithologic material as defined in a pregeology (.pgf) file, to cells in a 3D volumetric grid. There are two Estimation Types: Nearest Neighbor is a quick method that merely finds the nearest lithology sample interval among all of your data and assigns that material. It is very fast, but generally should not be used for your final work. Kriging provides the rigorous probabilistic approach to geologic indicator kriging. The probability for each material is computed for each cell center of your grid. The material with the highest probability is assigned to the cell. All of the individual material probabilities are provided as additional cell data components. This will allow you to identify regions where the material assignment is somewhat ambiguous. Needless to say, this approach is much slower (especially with many materials), but often yields superior results and interesting insights. There are also two Lithology Methods when Kriging is selected.
mask horizons mask horizons receives geologic input into its left input port and an optional input masking surface into its right port. Module Input Ports Input Field [Field] Accepts a data field. Input Area [Field] Accepts a field defining a surface of the area for masking Module Output Ports Output Field [Field] Outputs the processed field. NOTE: The mask is normally applied to the first surface only. If this surface is removed, the mask is lost. However the “Allow Subsetting” toggle will apply the mask to all horizons, but it will slow down processing and use more memory.
edit_horizons is an interactive module which allows you to probe points to be selectively added to the creation of each and every stratigraphic horiz
horizon_ranking The horizon_ranking module is used to give the user control over individual surface priorities and rankings. This allows the user to fine tune their hierarchy in ways much more complex than a simple top-down or bottom-up approach. Module Input Ports horizon_ranking has one input port which receives geologic input from modules like gridding and horizons
material_mapping This module can re-assign data corresponding to: Geologic Layer Material ID Indicator Adaptive Indicator for the purpose of grouping. This provides great flexibility for exploding models or coloring. Groups are processed from Top to Bottom. You can have overlapping groups or groups whose range falls inside a previous group. In that event, the lower groups override the values mapped in a higher group.
combine horizons The combine horizons module is used to merge up to six geologic horizons (surfaces) to create a field representing multiple geologic layers. The mesh (x-y coordinates) from the first input field, will be the mesh in the output. The input fields should have the same scale and origin, and number of nodes in order for the output data to have any meaning.
subset horizons The subset horizons module allows you to subset the output of gridding and horizons so that downstream modules (3d estimation, horizons to 3d, Geologic Surface) act on only a portion of the layers kriged. subset horizons is used to select a subset of the layers (and corresponding surfaces) export from gridding and horizons. This is useful if you want (need) to krige parameter data in each geologic layer separately.
collapse horizons The collapse horizons module allows you to subset the output of gridding and horizons so that downstream modules (3d estimation, horizons to 3d, Geologic Surface) act on only a single merged layer. collapse horizons is used to merge all layers (and corresponding surfaces) export from gridding and horizons into a single layer (topmost and bottommost surfaces).
displace_block displace_block receives any 3D field into its input port and outputs the same field translated in z according to a selected nodal data component of an input surface allowing for non-uniform fault block translation. This module allows for the creation of tear faults and other complex geologic structures. Used in conjunction with distance to surface it makes it possible to easily model extremely complex deformations.