Technical Library

An introduction to the Devonian-Paleogene prospectivity of the key areas of interest for the UKCS 29th Frontier Licensing Round.

This paper develops a fast and efficient large-scale anisotropic inversion technique for towed streamer electromagnetic (EM) data, which incorporates seismic constraints. The inversion algorithm is...

A case study was carried out over the Oseberg East Field where 2015 acquired multi-component broadband seismic data is being used to demonstrate potential improvement of structural interpretation. In...

Barnacles have been hampering the seismic industry since the start of the offshore seismic era. They attach to the streamer and impact signal to noise. Particularly in the areas close to the equator,...

In the shallow water environment found in parts of the Barents Sea, conventional imaging struggles to provide good imaging of the near surface. This is due to the lack of near offsets (angles) in...

In this case study from the Barents Sea, we have used refraction based Full Waveform Inversion (FWI) in an extreme anisotropy regime without the support from well information. We reveal our...

We propose a new acquisition design based on blended crossline sources. In contrast to existing blended-acquisition designs that only blend in 2D (inline direction and time), this design blends...

Seismic monitoring has been challenging on the Njord field. The rather weak 4D responses related to production have been difficult to detect due to the noise level in the streamer 4D seismic data and...

We present a robust method to produce long wavelength updates in gradient-based Full Waveform Inversion (FWI). The solution introduces dynamic weights in the velocity sensitivity kernel derived from...

We present a workflow that enables identification and characterization of leads and prospects by combining all recorded wavefields from dual-sensor streamer seismic data and the sub-surface...

We present a new model building workflow for simultaneous building of high resolution Q and anisotropic velocity models. The tomography algorithm uses both travel times and spectral ratios from...

Complex propagation of seismic waves through salt bodies, combined with incomplete acquisition geometry, result in uneven illumination of subsalt targets. Consequently, amplitude information from...

A typical depth migration velocity model building project delivers final velocity model attributes and their associated seismic products. The only quantitative measures of the reliability of these...

Efficient removal of the ghosts is key to achieving broadband seismic data. Accurate deghosting on the receiver-side can only be performed when both pressure and vertical particle velocity...

The impact of moving rough sea surfaces on seismic data can only be assessed through proper modelling. Existing seismic data modelling tools assume either flat or frozen sea surfaces. We present a...

The source ghost introduced by the sea surface reflection is usually considered noise which needs to be removed before imaging. We propose to utilize the source ghost in deblending as a natural...

The integrated interpretation of high-resolution seismic and EM data is a reliable and effective method to unlock the Barents Sea. A rising appetite for electromagnetic data (EM) was demonstrated by...