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Seismic in drilling

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Seismic in drilling
Imaging
Reverse time migration (RTM)
Kirchhoff depth migration
Beam migration
Wave equation migration (WEM)
Velocity modelling
Full Waveform Inversion (FWI)
Tomography

Imaging http://www.iongeo.com/Products_Services/Data_Processing/Advanced_Imaging/Waveform_Inversion/ (http://sepwww.stanford.edu/sep/biondo/3DSI_frame.html)
Seismic imaging algorithms can be divided in two broad categories: integral methods (e.g. Kirchhoff methods) and wavefield-continuation methods
Technique
Details

Wave-Equation Migration (WEM) / wavefield extrapolation migration (WEM)

Kirchhoff

Reverse Time Migration (RTM)
RTM propagates events both downward and upward through the earth model, explicitly handling turning waves and all other complex propagation paths. In many cases the ability to make use of these complex wave modes allows imaging of parts of the subsurface that otherwise have poor direct illumination.

Controlled Beam Migration (CBM) is an extension of Beam Migration technology
Targeted at imaging steeply dipping events and enhancing the signal-to-noise ratio of both land and marine datasets.
CBM has the steep-dip imaging capabilities of Kirchhoff techniques while offering the multi-arrival abilities of wave equation migration

Gaussian Packet Migration / Adaptive Beam Migration (ABM)

GPM is capable of creating high-resolution steep-dip images in complex environments or high-frequency images for post-salt targets where stratigraphic resolution is key

ABM is a flexible, targetable migration algorithm that combines many of the features associated with ray-based and wave-equation migrations. It is fully anisotropic, handling both vertical transverse isotropy (VTI) and tilted transverse isotropy (TTI). a b

a= http://www.cgg.com/default.aspx?cid=2357&lang=1 ; b= http://www.slb.com/services/seismic/geophysical_processing_characterization/dp/technologies/gpmimaging.aspx
Algorithms (http://www.seismiccity.com/Services.html)
Wave
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