IMAGING THE MARMOUSI DATASET

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IMAGING THE MARMOUSI DATASET

The following figures illustrate the improvements in imaging obtained using the band-limited Green's functions. The same Kirchhoff migration program was used to create all the images. Figure 4 shows a pre-stack migration using Green's functions derived from a finite difference solution to the eikonal equation. Figure 5 shows the image obtained using paraxial ray tracing and choosing the maximum amplitude arrival. Figure 6 shows the result from a migration using band-limited Green's functions. The improvement in imaging especially noticeable in the target zone that lies below the complex faults. Figure 7 shows a close-up of the reflectivity estimates in the target zone. The top frame is the true reflectivity, the center frame is the estimate created using paraxial ray tracing, the bottom frame is the estimate created using band-limited Green's functions.

Figure 4: [*] [*][ IMAGE ]

height=5in,width=4inKirchhoff migration using paraxial ray tracing. [*] Figure 6: [*] [*][ IMAGE ]

height=5.2in,width=4.inClose up of reflectivity estimates in the target zone. [*]