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| After updating the cube with checkshot wells the cube should be displayed and checked that the cube layers are matching the well data. The above figure shows that the cube matches according to the color code of the checkshot wells by displaying the bottom layer before updating the cube (to the left) and after updating the cube (to the right). After smoothing and updating the velocity cube it can now be used for depth conversion. Depth conversion using a dedicated command object
The velocity cube is useful for depth conversion of time grids into depth grids. This formula is used: depth_grid = time_grid x velocity_of_time_grid The size of the cube in z direction should be at least a little bit greater than the extent of the top and bottom surface. Then all the surfaces will fit into the velocity cube. |
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Transformed checkshot wells with bottom layer before and after updating cube
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Checking the cube visually
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| The velocity cube is displayed by dedicated commands available through the Cube schema. |
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Various ways to display cube information
Upper left viewport shows surface contours for the cube using the comannds Cube contours. Upper right shows planes in the cube colored and contoured with velocity using Cube views->Map X Y Z planes at cursor position. That command requires a cursor position inside the cube frame which can be set hitting the keyboard letter p or y while pointing at the screen. Bottom left is a cube overview contoured as a boundary surface using Cube contours. Bottom right is cube layer at level 4400 displayed as terrain using Display selected cube layers. This menu allows for displaying single cube layers or arranges multiple layers in viewports if this option is checked in on the Viewport display setup page. Displaying individual layers in a cube is important for checking the cube contents and also for presentation purposes. |
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Displaying velocity cube with three planes and transparent surface boundary Image Added
Various ways to display cube information |
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Dialog box for depth conversion using velocity cube.
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