Control points may be used to bias or give direction to gridding to produce more geologically representative results. Control points are additional data points included in the gridding process.
With the exception of inverse distance weighting, all gridding methods will treat a control point as a data value with the same weight as any other data point. The inverse distance weighting algorithm, however, allows you to set different weights for 2D, 3D, well or control point data.
Control points are especially useful for well depth or velocity maps where randomly spaced and/or isolated data points often result in bull's eye features. Control points can be used to provide a trend for your result grid.
Control points can also be used to bring in well data to grid in conjunction with Horizon Math results. In this method, horizon math is used to compute depth or velocity results and store them as amplitudes. In order to grid these "amplitudes" with well data control points are exported from the Well-spot Database and then brought into the gridding module.
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