Results

Figure 5 shows the two datasets after cross-equalization. The time-slices correspond to depths above the producing intervals, where we would expect there to be no difference between the two datasets. Indeed, amplitudes in the two surveys are directly comparable suggesting a successful cross-equalization at this level in the subsurface. To fully assess whether the two datasets contain useful time-lapse information, a complete interpretation of the producing intervals is needed in conjunction with a study of production histories.

 

after
Figure 5 After cross-equalization: panels from the 1979 survey (left), panels from the 1991 survey (right).