paul sava


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© 2007 PC Sava

Page updated on
October 11, 2014

WSI: wavefield seismic imaging


Seismic imaging is the key technology for oil and gas exploration and for the investigation of deep earth structure. Recent developments in acquisition and computing methodology elevate the effectiveness of seismic imaging which increasingly focused on areas characterized by structural and stratigraphic complexity. We are seeing a greater emphasis on imaging sub-salt or sub-basalt geology, which suffers from poor illumination and complicated wave propagation. On one hand, this challenge can be addressed by improved data acquisition for 3D wide-azimuth/wide-band data, dense land and marine sampling and other innovative approaches to data acquisition. On the other hand, this challenge can be addressed by development of advanced wavefield imaging methodology which is increasingly becoming a routine tool due to its proven ability to exploit data complexity to infer geologic structure. One key ingredient for wavefield imaging is our ability to simulate accurate wavefields in the subsurface, which requires accurate knowledge of the earth model. Another key ingredient is our ability to extract information from the simulated wavefields about the accuracy of our reconstruction and to feed this information back into the earth model.

The Wavefield Seismic Imaging course provides a survey of current seismic imaging methods designed for wavefield seismic data. Wavefield seismic imaging (also known as wave-equation migration) is presented in a unified conceptual framework in connection with related topics, including migration velocity analysis (MVA) and amplitude versus angle analysis (AVA). The main target audience for this course are graduate students engaged in seismic imaging research and practicing geophysicists with a basic understanding of seismic data processing and imaging who wish to get familiar with modern imaging techniques available to the industry. Geologists and reservoir engineers can also benefit from a short version of this course, by familiarizing themselves with the underlying concepts behind practical imaging techniques, their applicability and limitations.