Efficient Target Oriented 3D

Question 1

Specify 2 Migration domains

Answer 1

Time and Depth

Question 2

What are the 2 possible positions in the processing sequence for MIGRATION

Answer 2

Pre-stack and Post-stack

Question 3

Specify 2 methods for applying migration (works for either pre-stack or post-stack)

Answer 3

Time Migration - dip events ‘image’

Depth Migration - Lateral Velocity variation

Question 4

How was it determined that 3D refraction statics were beneficial to seismic data quality ?

Answer 4

comparison w elevation statics showed improvement of reflections

Question 5

What is a Surface Consistent Process ?

Answer 5

Any process that takes surface locations of shots and receivers into consideration in the computations

Question 6

List 4 surface Consistent Processes in the processing sequence

Answer 6

Conversion to Minimum Phase
3D surface consistent deconvolution
2 passes surface consistent residual static corrections
interpret velocities

Question 7

With Vibroseis, what process MUST be applied to field data?

Answer 7

cross-correlation

output data is 0 phase

Question 8

What was the process right before Spiking Deconvolution ?

Answer 8

conversion 0 phase data to minimum phase data.

Deconvolution assumes input data is minimum phase

Question 9

What is the main difference between FX process and F-XY process ?

Answer 9

F-X is 2D

F-XY is 3D