Technical Library

The remarkable improvements in data quality due to rapid advances in processing algorithms and computer technology over the past several years have been nothing short of phenomenal. The provision of...

Historically, the practice in velocity model building usually resorted to one of two approaches: the layer-based and the gridded (Jones, 2003). Additionally, in recent years both approaches have...

Standard shot-based one-way wavefield extrapolation (WE) preSDM techniques image the subsurface by continuing the source and receiver wave-fields for each shot. The imaging condition is invoked by...

Geophysicists need seismic data to convey a reliable, geologically meaningful picture of the subsurface both at the prospect and geologic system levels. This requires that spatial sampling be...

Full-wave acquisition and processing is fast becoming the new revolution in seismic imaging, just as 3D seismic was a revolution in seismic imaging 20 years ago. But why the need for full-wave...

Recent initiatives in the North Sea and UKCS such as the introduction of the ‘Fallow Field’ initiative and offering of ‘Promote’ licenses have started to generate activity by attracting new entrants...

In recent years we have seen processing and imaging algorithms re-written to handle anisotropic effects. The most common type of anisotropy that one deals with in seismic data is polar anisotropy...

Here we review several of the model building techniques introduced over the past decade or so, with emphasis on the assumptions and limitations of each technique. Model building techniques are...

4D (also known as time-lapse or repeat) seismic has in the past few years emerged as a significant technique for monitoring fluid movement within reservoirs. In recent years, an improved...

Here we present a technique for obtaining high-resolution velocity information from pre-stack time or depth migrated data. Essentially we employ techniques of continuous velocity estimation used for...