Seismic imaging of incomplete data and simultaneous-source data using least-squares reverse time migration with shaping regularization

Z Xue, Y Chen, S Fomel, J Sun - Geophysics, 2016 - library.seg.org
Simultaneous-source acquisition improves the efficiency of the seismic data acquisition
process. However, direct imaging of simultaneous-source data may introduce crosstalk …

Elastic least-squares reverse time migration

Z Feng, GT Schuster - Geophysics, 2017 - library.seg.org
We use elastic least-squares reverse time migration (LSRTM) to invert for the reflectivity
images of P-and S-wave impedances. Elastic LSRTM solves the linearized elastic-wave …

[图书][B] Seismic inversion

GT Schuster - 2017 - library.seg.org
This book describes the theory and practice of inverting seismic data for the subsurface rock
properties of the earth. The primary application is for inverting reflection and/or transmission …

An approximate inverse to the extended Born modeling operator

J Hou, WW Symes - Geophysics, 2015 - library.seg.org
Given a correct (data-consistent) velocity model, reverse time migration (RTM) correctly
positions reflectors but generally with incorrect amplitudes and wavelets. Iterative least …

[HTML][HTML] 表面多次波最小二乘逆时偏移成像

刘学建, 刘伊克 - 地球物理学报, 2016 - html.rhhz.net
使用相同的炮记录, 多次波偏移能提供比反射波偏移更广的地下照明和更多的地下覆盖但是同时
产生很多的串声噪声. 相比传统逆时偏移, 最小二乘逆时偏移反演的反射波成像结果具有更高的 …

Accelerating extended least-squares migration with weighted conjugate gradient iteration

J Hou, WW Symes - Geophysics, 2016 - library.seg.org
Least-squares migration (LSM) iteratively achieves a mean-square best fit to seismic
reflection data, provided that a kinematically accurate velocity model is available. The …

Prestack correlative least-squares reverse time migration

X Liu, Y Liu, H Lu, H Hu, M Khan - Geophysics, 2017 - library.seg.org
In the correlative least-squares reverse time migration (CLSRTM) scheme, a stacked image
is updated using a gradient-based inversion algorithm. However, CLSRTM experiences the …

Least squares Kirchhoff depth migration: Implementation, challenges, and opportunities

D Trad* - SEG Technical Program Expanded Abstracts 2015, 2015 - library.seg.org
Least squares migration (LSM), like interpolation, has the potential to address sampling
issues on migrated images; it also generates images with better amplitudes than standard …

Plane-wave least-squares reverse time migration with a preconditioned stochastic conjugate gradient method

C Li, J Huang, Z Li, R Wang - Geophysics, 2018 - library.seg.org
This study derives a preconditioned stochastic conjugate gradient (CG) method that
combines stochastic optimization with singular spectrum analysis (SSA) denoising to …

From removing to using multiples in closed-loop imaging

DJ Verschuur, AJ Berkhout - The Leading Edge, 2015 - library.seg.org
In seismic exploration, multiple reflections traditionally have been labeled as unwanted
signal, and a huge effort has been made to remove them. Despite great advancements …