Technical Content

We introduce an inversion-driven free surface multiple modelling scheme based on multi-order Green’s functions. The approach optionally combines surface related multiple modelling with source designature and receiver deghosting. We demonstrate the effectiveness of the approach for peg-leg multiple suppression as well as highlighting the ...

Ghost wavefield elimination is pivotal for improving the bandwidth and image resolution for marine seismic data. Synhronized multi-level source arrays, which aim to synchronize the primary wavefield and desynchronize the source ghost, can greatly attenuate the source ghost wavefield during acquistion. However, even with ...

RTM surface offset gathers (SOG) contain subsalt events spanning the entire offset range (i.e., longer usable curvatures for tomography). RTM SOGs also have more reliable residual curvatures because each offset and azimuth group is migrated independently and does not interfere with the neighboring ones ...

We designed and implemented a practical and comprehensive workflow to mitigate missing source wavelet information and waveforms with vast spatial variation for land dynamite surveys and addressed the common challenges of acoustic-FWI application on land surveys during field data preparation.

A flexible Radon modelling algorithm using time-frequency sparseness weights is introduced. The method may be used for a number of applications and combines the dealiasing and time resolution benefits of existing methods. Compared with a frequency domain sparseness approach, the proposed method results in ...

The paper gives an overview of a full 4C deblending process and its results up to migration in the case of a real 2D 4C dataset acquired offshore Malaysia. Special emphasis is put on the deblending QCs and the specificities of the deblending flow ...

Article describes application of TomoML to our 35,000 km2 Cornerstone survey in the North Sea. Also make reference to broadband deghosting, dip-constrained channel tomography and dual azimuth.

We have developed a method to jointly depth invert frequency and time domain Airborne EM data in complex topographic and geologic environments, in 2.5D and 3D. Inversion of synthetic and field data show that using AEM data sets with complimentary information (geo-steering) increases the ...

Amplitude versus Offset and Azimuth (AVOAz) Analysis can be separated into two separate parts; Amplitude versus Offset (AVO) analysis and Amplitude versus Azimuth (AVAz) analysis. Useful information about fractures and the anisotropy is obtained by just examining the AVAz. The AVAz can be described ...