Technical Library

A case study was carried out over the Brage Field, where high fidelity velocity model was built to solve the complex velocity variations in the overburden. The shallow channel system was captured in...

Full waveform inversion (FWI) iteratively minimizes the misfit between the recorded and modelled seismic data to derive an accurate velocity model. The method can produce high-resolution velocity...

Uncertainties in seismic images or reservoir characterisation can very often been associated with lack of resolution, illumination problems, or the inability to invert for accurate velocity models....

We discuss a depth imaging solution that uses primaries and all orders of multiple reflections to image seismic data from seabed acquisitions. The processing sequence starts by separating the...

A depth migration method, that uses primaries and all orders of multiples, has been adapted to produce extended 3D and 4D images in the context of seabed acquisition. The technology has been...

A workflow has been designed to process different types of streamer acquisition for a single 4D survey. Undershoot data has been processed together with prime lines, but special attention has been...

We discuss a wave equation solution for broadband imaging of seismic data. The new methodology poses depth migration as a wave equation reflectivity inversion; enhancing the resolution and balancing...

The main objective of this project was to evaluate the ability to estimate reservoir properties directly from broadband seismic without using well information for calibration. This estimation was...

We derive a new reverse-time migration solution that uses a pseudo-analytical, two-way extrapolator in order to compensate for attenuation losses in visco-acoustic media. The algorithm permits large...

The giant sub-salt discoveries from the conjugate Brazilian margin give encouraging support for analogous hydrocarbon potential offshore Angola. The challenge is to image the deep geology beneath...