This paper is an attempt to fill the technology gap existing between pure P- and PS-wave imaging. Full
wavefield extrapolation techniques are well developed for P-wave and RTM has been now available for
almost a decade. Conversely, ray based migration algorithms are still the ...
Least squares migration (LSM), like interpolation, has the potential to address sampling issues and generate images with better amplitudes than migration. Although both techniques share the same goal and often the same formulation, they differ on the nature of the model that is used ...
Gaussian Beam depth migration (GBM) overcomes the single-wavefront limitation of the most implementations of Kirchhoff migration, and constitutes a cost-effective alternative to full-wavefield imaging methods such as reverse time migration. Common-offset beam migration was originally derived to exploit symmetries available in marine towed-streamer acquisition ...
Variable-depth streamer acquisition has become a popular solution for marine seismic acquisition to obtain data with both low and high frequencies: the curved cable profile produces notch diversity that minimizes the residual ghosts in stacking and the deep towing nature provides high S/N at ...
Analysis of time-lapse data is performed on migrated seismic images, which represent the spatial and time-lapse variability of the medium’s reflectivity. The process of migration effectively rotates the wavelet so that it is normal to the imaged reflectors. Processes used in 4D reservoir analysis ...
We discuss the problem of creating low frequency models for inversion and suggest a simple facies trend-based method which reduces reliance on prior laterally-varying assumptions about the heterogeneity of native reservoir properties. In our example, we were able to identify key hydrocarbon-bearing facies from ...
We present a case study over the South Utsira High. This survey was the first commercial BroadSource with BroadSeis 3D survey, and was acquired over the Johan Sverdrup field. A small pilot survey was initially acquired over the Avaldsnes discovery and later extended to ...
We present the results from flying the FALCON-2 system over the R.J. Smith AGG test range at Kauring, West Australia.
We describe opportunities and challenges for imaging seismic data acquired using conventional marine sources and receivers located on the seafloor. Opportunities include the promise of greater imaging resolution than sea-surface acquisition and processing can offer, especially using P-wave to S-wave converted reflection energy (PS ...