Technical Library

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 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...