Journal Article10.3997/1365-2397.2014017
Tutorial: migration imaging conditions
31
TL;DR: In this article, the authors outline the various methods involved in forming imaging conditions, primarily for the case of wave-extrapolation methods, and describe some of the techniques used to build gathers of pre-stack-migrated data for use in post-migration velocity analysis.
read more
Abstract: Migration of seismic data is the process that attempts to build an image of the Earth’s interior from recorded field data, by repositioning these data into their ‘true’ geological position in the subsurface, using various numerical approximations of either a wave-theoretical or ray-theoretical description of the propagation of sound waves in the subsurface.
This migration can be described as being performed in a number of stages, both for ray and wave-extrapolation based methods. The final stage of the migration process is that which forms the image, via what is known as an imaging condition.
In this tutorial, I will outline the various methods involved in forming imaging conditions, primarily for the case of wave-extrapolation methods, and describe some of the techniques used to build gathers of pre-stack-migrated data for use in post-migration velocity analysis.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Full-waveform event location and moment tensor inversion for induced seismicity
Chris Willacy,Ewoud van Dedem,Sara Minisini,Junlun Li,Jan-Willem Blokland,Indrajit Das,Alexander Droujinine +6 more
TL;DR: In this paper, a robust location methodologies for locating microearthquake events below complex heterogeneous overburden requires robust location methods that can honor multipathing in the seismic wavefield.
62
Lamb-wave-based two-dimensional areal scan damage imaging using reverse-time migration with a normalized zero-lag cross-correlation imaging condition
TL;DR: In this article, a two-dimensional noncontact, areal scanning system was presented to image and quantify multiple sites of damage in isotropic plates using reverse-time migration with a normalized zero-la...
34
Imaging salt with turning seismic waves
D. Hale,N. R. Hill,J. Stefani +2 more
- 01 Jun 1992
TL;DR: Turning seismic waves, which travel first downward and then upward before (and after) reflection, have been recorded in a 3D seismic survey conducted over an overhanging salt dome as mentioned in this paper.
20
Towards ultrasound travel time tomography for quantifying human limb geometry and material properties
TL;DR: Sound speed inversions made using simulated time of flight data from a numerical limb-mimicking phantom comprised of soft tissue and a bone inclusion demonstrate that wave front tracking forward modeling combined with L1 regularization may lead to accurate estimates of bone sound speed.
Seismic Imaging in and Around Salt Bodies: Problems and Pitfalls
Ian F. Jones,Ian Davison +1 more
TL;DR: In this paper, a reverse time migration (RTM) algorithm was proposed to detect double bounces and turning wave reflections, enabling the imaging of vertical and overturned salt flanks, which poses significant challenges for model building and migration, requiring tight integration of geological interpretation, and geophysical skills.
15
References
Reverse time migration
TL;DR: In this article, the authors examined the alternative of carrying out the migration through a reverse time extrapolation, which may offer improvements over existing migration methods, especially in cases of steeply dipping structures with strong velocity contrasts.
Toward a unified theory of reflector mapping
TL;DR: In this article, the authors present a seismic mapping of reflectors in the presence of an arbitrary velocity model, dipping and curved reflectors, diffractions, ghosts, surface elevation variations, and multiple reflections.
1K
Migration by extrapolation of time‐dependent boundary values*
TL;DR: In this article, a finite-difference solution of the two-dimensional acoustic wave equation is proposed to migrate an observed zero-offset wavefield as the solution of a boundary value problem in which the data are extrapolated backward in time.
852
Least-squares migration of incomplete reflection data
TL;DR: In this paper, a least-squares migration algorithm is presented that reduces the migration artifacts arising from incomplete data by using a preconditioned linear conjugate gradient scheme that employs regularization.
810