Figure 3 presents a comparison of two wells for which gray scale gamma ray and color lithology logs have been generated. The gamma ray and lithodensity log data is also displayed in the more conventional graph format. In Figure 3 the relative vertical positions of the two wells have been shifted from a sea level datum to a new datum at the top of the Lower Morrow Limestone. In the same manner, the structural cross-section of Figure 1 could be converted to a stratigraphic cross section. Color cube crossplot of lithology based on parameters derived from lithodensity log data.
Depths are in feet.
At present a general routine is used to handle depth-related parameters derived from other analysis packages or data from single log types other than gamma ray. For a single log, the color spectrum or hue intensities are assigned to readings over a range of two standard deviations above or below the mean for that log. When multiple wells are visualized from these log types, the readings are first normalized as described below. Subroutines may be developed in the future to provide custom handling of additional logs commonly found in Kansas, including resistivity and SP data. Using typical raw data, images for individual wells frequently appear to have a color shift relative to the images of surrounding wells.