Dip Moveout ProcessingAssists geophysicists in implementing and evaluating dip moveout (DMO) processing. With chapters on why to choose DMO, DMO fundamentals, DMO by Fourier transform, DMO by integral methods, and DMO for depth-variable velocity, this volume discusses the theory, motives, and limitations underlying the most popular DMO methods. |
Contents
DMO by Fourier Transform | 3-1 |
DMO by Integral Methods | 4-1 |
Hales Method for DepthVariable Velocity | 5-8 |
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Common terms and phrases
3-D DMO algorithm Amplitude versus offset Annual SEG Meeting cable feathering Chapter CMP spacing CMP stacking common offset computational constant constant-velocity DMO constant-velocity stacks corresponding crossline defined depth-variable velocity Deregowski derived diffractions dip filter dip-decomposition method dip-dependent NMO Dip-moveout dipping reflections DMO by Fourier DMO ellipse DMO implementation DMO impulse response DMO processing DMO stack elliptical reflector equations 3-4 Fourier transform methods Gardner geophone Geophysical Hale's method half-offset horizontal reflection responses illustrated in Figure implies impulse recorded inline direction integral DMO method integral methods interpolation log-stretch trick mapping method for DMO midpoint moveout NMO correction NMO velocity non-zero-offset offset sections output traces prestack migration raypath reference slopes reflector dip reflector point dispersal Rocca rule of thumb sampling interval seismic data seismograms shift source-receiver offset spatial aliasing stacking velocity steeply dipping t₁ velocity analysis wavenumber Western Geophysical zero zero-offset data zero-offset reflection slope zero-offset traces