Technical Library

Dual sensor streamer acquisition allows the data to be accurately separated into upgoing and downgoing wavefields. The two components are used as input to migration that employs primaries and...

This novel Velocity Model Building (VMB) system addresses issues of Economics, Turn-Around-Time, Quality, Resolution, Stability and Ease-of-Use. Seismic data is decomposed into wavelets, each with...

Typically model parameter estimation is achieved through multiple iterations of linearized tomography and depth migration. In this paper we discuss a method to reduce the migration effort by applying...

The geophysical objectives in the exploration for hydrocarbons in the East China Sea require 3D seismic data of sufficiently high quality to facilitate accurate structural and lithological...

A streamlined and semi-automated Pre-stack depth migration velocity model building approach has been used to solve imaging distortions caused by near surface channel systems in offshore Tanzania. In...

Continental shelf slopes are associated with deep erosional canyons that in general form perpendicular to depth contours, but we acquire strike of the water bottom in order to minimise HSE risk from...

We show here a novel velocity model building approach using the Beam-derived wavelet attributes through a 3D PSDM case study in the UK northern North Sea. There are several advantages by using the...

Successful application of shallow water full-waveform inversion (FWI) requires a good starting model, the right data, and an optimal algorithm. Our implementation is based on a pseudo-analytic (PA)...

Tomography is commonly used to build the anisotropic model for depth imaging, which requires human intervention for residual picking and quality control. In addition, tomography is typically...

We demonstrate a novel workflow using reflections, refractions and multiples for building highly accurate PSDM velocity models for a complex geological setting. By combining wavelet shift tomography,...