Topography Least-Squares Reverse-Time Migration Based on Adaptive Unstructured Mesh
Sign Up to like & getrecommendations! Published in 2019 at "Surveys in Geophysics"
DOI: 10.1007/s10712-019-09578-0
Abstract: Least-squares reverse-time migration (LSRTM) attempts to invert the broadband-wavenumber reflectivity image by minimizing the residual between observed and predicted seismograms via linearized inversion. However, rugged topography poses a challenge in front of LSRTM. To tackle… read more here.
Keywords: topography; least squares; reverse time; squares reverse ... See more keywords
Imaging of elastic seismic data by least‐squares reverse time migration with weighted L2‐norm multiplicative and modified total‐variation regularizations
Sign Up to like & getrecommendations! Published in 2019 at "Geophysical Prospecting"
DOI: 10.1111/1365-2478.12849
Abstract: ABSTRACT Least‐squares reverse time migration has the potential to yield high‐quality images of the Earth. Compared with acoustic methods, elastic least‐squares reverse time migration can effectively address mode conversion and provide velocity/impendence and density perturbation… read more here.
Keywords: least squares; reverse time; squares reverse; time migration ... See more keywords
Least-squares reverse time migration with local Radon-based preconditioning
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DOI: 10.1190/geo2016-0117.1
Abstract: ABSTRACTLeast-squares migration (LSM) can produce images with better balanced amplitudes and fewer artifacts than standard migration. The conventional objective function used for LSM minimizes the L2-norm of the data residual between the predicted and the… read more here.
Keywords: least squares; reverse time; radon; squares reverse ... See more keywords
Prestack correlative least-squares reverse time migration
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DOI: 10.1190/geo2016-0416.1
Abstract: ABSTRACTIn the correlative least-squares reverse time migration (CLSRTM) scheme, a stacked image is updated using a gradient-based inversion algorithm. However, CLSRTM experiences the incoherent stacking of different shots during each iteration due to the use… read more here.
Keywords: correlative least; least squares; reverse time; squares reverse ... See more keywords
Attenuation compensation in anisotropic least-squares reverse time migration
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DOI: 10.1190/geo2016-0677.1
Abstract: ABSTRACTAnisotropic and attenuating properties of subsurface media cause amplitude loss and waveform distortion in seismic wave propagation, resulting in negative influence on seismic imaging. To correct the anisotropy effect and compensate amplitude attenuation, a compensated-amplitude… read more here.
Keywords: least squares; reverse time; squares reverse; time migration ... See more keywords
Fast least-squares reverse time migration via a superposition of Kronecker products
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DOI: 10.1190/geo2019-0254.1
Abstract: Least-squares reverse time migration (LSRTM) has become increasingly popular for complex wavefield imaging due to its ability to equalize image amplitudes, attenuate migration artifacts, handle incomplete and noisy data, and improve spatial resolution. The major… read more here.
Keywords: least squares; reverse time; kronecker; squares reverse ... See more keywords
Diffraction imaging for the fault-karst structure by least-squares reverse time migration
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DOI: 10.1190/int-2020-0146.1
Abstract: The fault-karst reservoir, which evolved from the deformation and karstification of carbonate rock, is one of the most important reservoir types in Western China. Along the deep-seated fault zones, there are a lot of widely… read more here.
Keywords: fault; least squares; reverse time; squares reverse ... See more keywords