1. Survey: Select a survey to be used in the process.
2. Inline extent: Enter the output volume’s inline extents.
3. Crossline extent: Enter the output volume’s crossline extents.
4. TWT (ms) / TVDSS (m) / TVDSS (ft): Select a vertical dimension and enter the output volume’s vertical extents.

1. Mode
   • Single volume: Creates a single volume
   • Single volume (Delta): Creates a single Delta volume
   • Single volume (Vint from Checkshots): Creates a single interval velocity volume from well T/D pairs
   • Elastic volumes: Creates P-impedance, S-impedance and density volumes and an optional Vp/Vs volume
2. Model: Select a layer model to control the structural behaviour of the model (see Creating a Windowing Model).
3. Water bottom: Only required when using trends relative to the water bottom. Select a horizon or enter a constant.
4. End-member trends: Select whether to use end-member trends to build the model. If they are included, the End-member trends section must be filled in.
5. Interpolation
   • Simple interpolation per layer: Constructs detailed layered models from well data using inverse distance weighting.
   • Simple kriging: Constructs blocky layered models from well data and supporting information. At each location, each window model layer is populated with a single value.
   • 3D kriging: Constructs volumes using well data and supporting information using kriging.
   • Ghost horizon kriging: Constructs detailed layered models from well data using kriging and supporting information. Window model layers are automatically divided by ghost horizons using the conformability specified in the windowing model.
6. Vp/Vs: Only available in the Elastic volumes mode. Select whether to create a Vp/Vs output volume.
7. Trend volumes: Select whether or not to create Trend volumes for 3D/Ghost Horizon kriging methods.

1. Add wells by clicking the blue "+" icon.
2. For each well, select the log curves to use. Compressional, Shear, and Density log curves must be selected for the Elastic volumes mode. Insight will attempt to convert log curves based on their data class. For example, Slowness curves will be converted to Velocity.
3. Specify well curve vertical extents: When enabled, the vertical extents can be specified separately for each well. In addition, for depth models the depth units (m or ft) can be specified (global setting for all wells).

This section is only visible when the Interpolation parameter is set to Simple interpolation per layer in the Model section.

It displays one row for each layer in the model. For each layer, one of the following interpolation algorithms can be selected:

• Inverse Distance: The intersected well velocities are interpolated on the ghost layers using an inverse distance function. This generates a model that varies spatially, following the implied stratigraphy, that ties the wells.
• Average of well values: The ghost layers are filled with the average of the intersected well samples. This generates a model that is constant along X,Y, for each Z value, following the stratigraphy implied by the window model.

Horizontal/vertical ratio: Only visible when at least one layer uses the Inverse Distance interpolation method. Horizontal/vertical ratio will calculate a value using inverse distance weighting but will increase the weighting of the horizontally located samples in proportion to samples located vertically above or below the value. For more information, refer to Understanding the Horizontal / Vertical Ratio.

1. Horizontal range (m): Specify the distance from the well up to which the well data influences the Kriging horizontally.
2. Vertical range (ms): Specify the distance from the well up to which the well data influences the Kriging vertically.
3. Collocated volumes: Select additional volumes to be used to guide the Kriging, for example, a seismic velocity volume when building a velocity model from well data. We recommend selecting volumes that have a range of values similar to the well data. Add the collocated volumes by clicking the blue "+" icon.

This section is only visible when a Kriging Interpolation method is used in the Model section.

4. Constant trend: Select Add constant trend to include a constant trend term in the Kriging calculations.
5. Depth-based trend
   • None: No depth-based trend
   • Depth: Linear trend based on depth. When selected, a velocity volume and velocity type must be specified.
   • Depth below water bottom: Linear trend based on depth below the water bottom horizon. When selected, velocity volume and velocity type must be specified, and a water bottom horizon must be selected in the Model section.
   • Water bottom depth: Linear trend based on the depth of the water bottom. When selected, a water bottom horizon must be selected in the Model section.
6. Trend volumes: Select one or more volumes whose sample values will be used as trends. Add the trend volumes by clicking the blue "+" icon.

This section is only visible when the Use end-member trends is selected in the Model section.

1. End-member trends: Select the end-member trends to use in the calculations.
2. The table displays one row per layer in the model. For each row, select one or more lithologies (from the end-member trends) and the relative proportion of that lithology in the layer. Additional lithologies can be selected by clicking on the blue "+" icon next to each layer.