Translations:Mathematical foundation of 3-D migration/185/en

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  • Figure 7.3-1  Algorithms for 3-D migration based on the splitting and separation techniques of implementing migration operators.

    Figure 7.3-1  Algorithms for 3-D migration based on the splitting and separation techniques of implementing migration operators.

  • Figure 7.3-2  A 15-degree split 3-D migration operator impulse response. See Figure 4.2-1 for the 2-D equivalent response. Except for the amplitudes, the vertical cross-section at center line (51) is the same as the 2-D impulse response.

    Figure 7.3-2  A 15-degree split 3-D migration operator impulse response. See Figure 4.2-1 for the 2-D equivalent response. Except for the amplitudes, the vertical cross-section at center line (51) is the same as the 2-D impulse response.

  • Figure 7.3-3  A 45-degree split 3-D migration operator impulse response. See Figure 4.2-1 for the 2-D equivalent response. Except for the amplitudes, the vertical cross-section at center line (51) is the same as the 2-D impulse response.

    Figure 7.3-3  A 45-degree split 3-D migration operator impulse response. See Figure 4.2-1 for the 2-D equivalent response. Except for the amplitudes, the vertical cross-section at center line (51) is the same as the 2-D impulse response.

  • Figure 4.3-1  Desired impulse response of a 90-degree migration algorithm is a semicircle (top), while the impulse response of the 15-degree migration algorithm is an ellipse (bottom). The propagation zone is defined by the portion of the ellipse below the small circles, and the evanescent zone is defined by the portions above the small circles. For comparison, the desired response has been superimposed on the impulse response of the 15-degree equation.

    Figure 4.3-1  Desired impulse response of a 90-degree migration algorithm is a semicircle (top), while the impulse response of the 15-degree migration algorithm is an ellipse (bottom). The propagation zone is defined by the portion of the ellipse below the small circles, and the evanescent zone is defined by the portions above the small circles. For comparison, the desired response has been superimposed on the impulse response of the 15-degree equation.

  • Figure 4.1-23  An algorithmic description of frequency-space migration.

    Figure 4.1-23  An algorithmic description of frequency-space migration.

  • Figure 7.3-13  Impulse response of a 3-D migration operator based on a 39-point explicit 1-D operator transformed into a 2-D operator using the 3 × 3 McClellan filter template in Table G-1. Compare with Figures 7.3-11, 7.3-12, and 7.3-14.

    Figure 7.3-13  Impulse response of a 3-D migration operator based on a 39-point explicit 1-D operator transformed into a 2-D operator using the 3 × 3 McClellan filter template in Table G-1. Compare with Figures 7.3-11, 7.3-12, and 7.3-14.

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