Figure 15

Figure 16 shows the picked amplitudes at the CIG locations, which correspond to a valley of the sinusoidal irregularities (where the event was observed to be flatter) for each lithology (positions 6.576, 7.824, and 10.304), and

model2migpick
Picked amplitudes from CIG
of model 2
Figure 16 |

Figure 17 shows the crossplot of the corresponding intercept and gradient attributes. In both cases, we can observe a good agreement with the expected tendencies. We also calculated the intercept and gradient attributes at CIGs locations which correspond to a peak of the sinusoidal irregularities; in this case, the relative gradient value for the shale/brine interface is higher than expected.

ABmodel2mig
Intercept versus Gradient
crossplot from picked amplitudes of model 2 after migration
Figure 17 |

4/28/2000