2-D vs. 3-D

As a final comparison I extracted the crossline corresponding to the 2-D tomography/migration of Chapter . Figure 22 shows a blowup of the lower portion of both images. Note how the 3-D result is almost universally better. The lower salt edge reflectors continue further in the 2-D case, but are not as consistent in amplitude or as well focused. The upper salt edge reflectors are better focused in 3-D case. The salt bottom in the 3-D case is of higher amplitude, and more consistent than its 2-D counterpart. To the right of the salt the improvements are even more dramatic. The chalk reflectors are much better imaged in 3-D case. The basin structure is better focused in 3-D case, and below the basin we see many more coherent events than in the 2-D migration.

 

3d-vs-2d
Figure 22 A comparison of the 2 and 3-D tomography/migration result. The bottom image is the best migration result from Chapter . The top figure is the same crossline, taken from 3-D migration/tomography result.