Plane‐wave Gaussian‐beam prestack depth migration

2007 ◽  
Author(s):  
Chaoshun Hu ◽  
Mrinal K. Sen ◽  
Paul Stoffa ◽  
Kirk McIntosh
Keyword(s):  
Plane Wave ◽  
Gaussian Beam ◽  
Prestack Depth Migration ◽  
Depth Migration

An improved plane wave prestack depth migration method

2001 ◽  
Author(s):  
Peiyong Sun ◽  
Shulun Zhang ◽  
Jingxia Zhao
Keyword(s):  
Plane Wave ◽  
Prestack Depth Migration ◽  
Depth Migration ◽  
Migration Method

Gaussian‐Beam‐Kirchhoff prestack depth migration

2006 ◽  
Author(s):  
Carlos A. S. Ferreira ◽  
João C. R. Cruz
Keyword(s):  
Gaussian Beam ◽  
Prestack Depth Migration ◽  
Depth Migration

Slowness-driven Gaussian-beam prestack depth migration for low-fold seismic data

Geophysics ◽  
2009 ◽  
Vol 74 (6) ◽  
pp. WCA35-WCA45 ◽  
Author(s):  
Chaoshun Hu ◽  
Paul L. Stoffa
Keyword(s):  
Gaussian Beam ◽  
Seismic Data ◽  
Fresnel Zone ◽  
Seismic Energy ◽  
Real Data ◽  
Ocean Bottom ◽  
Prestack Depth Migration ◽  
Seismic Reflection Data ◽  
Depth Migration ◽  
Reflection Data

Subsurface images based on low-fold seismic reflection data or data with geometry acquisition limitations, such as obtained from ocean-bottom seismography (OBS), are often corrupted by migration swing artifacts. Incorporating prestack instantaneous slowness information into the imaging condition can significantly reduce these migration swing artifacts and improve image quality, especially for areas with poor illumination. We combine the horizontal surface slowness information of observed seismic data with Gaussian-beam depth migration to implement a new slowness-driven Gaussian-beam prestack depth migration whereby Fresnel weighting is combined naturally with beam summation. The prestack instantaneous slowness information is extracted from the original OBS or shot gathers using local slant stacks and is combined with a local semblance analysis. During migration, we propagate the seismic energy downward, knowing its instantaneous slowness information. At each image location, the beam summation is localized in a resolution-dependent Fresnel zone; the instantaneous slowness information controls the beam summation. Synthetic and real data examples confirm that slowness-driven Gaussian-beam migration can suppress most noise from inadequate stacking and give a clearer migration result.

Prestack depth migration method using the time-space Gaussian beam

2015 ◽  
Author(s):  
Jidong Yang* ◽  
Jianping Huang ◽  
Xin Wang ◽  
Zhenchun Li
Keyword(s):  
Gaussian Beam ◽  
Prestack Depth Migration ◽  
Depth Migration ◽  
Time Space ◽  
Migration Method

Multiwave velocity analysis based on Gaussian beam prestack depth migration

2014 ◽  
Vol 11 (2) ◽  
pp. 186-196 ◽  
Author(s):  
Jian-Guang Han ◽  
Yun Wang ◽  
Ning Han ◽  
Zhan-Tao Xing ◽  
Jun Lu
Keyword(s):  
Gaussian Beam ◽  
Velocity Analysis ◽  
Prestack Depth Migration ◽  
Depth Migration

Attenuation compensation in multicomponent Gaussian beam prestack depth migration

2015 ◽  
Vol 12 (2) ◽  
pp. 157-168 ◽  
Author(s):  
Juan Wu ◽  
Xiao-Hong Chen ◽  
Min Bai ◽  
Guo-Chang Liu
Keyword(s):  
Gaussian Beam ◽  
Prestack Depth Migration ◽  
Depth Migration ◽  
Attenuation Compensation
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