Technical Content

Multiple contamination in seismic data from the south of the Sultanate of Oman is challenging due to the combined presence of short-period surface and internal multiples generated in the upper section. We present an innovative workflow to attenuate multiples in the pre-migration pre-stack domain ...

Multi-dimensional deconvolution (MDD) is an attractive method to remove free-surface multiples for OBN datasets. Multi-dimensional implementations are able to produce accurate multiple models in areas of structurally complex reflectivity. For most OBN acquisitions, the receiver density is not sufficient for receiver-side MDD. Consequently, source-side ...

Acoustic full-waveform inversion (FWI) is widely employed to produce high-resolution subsurface models, especially for the P-wave velocity. However, more complex geological challenges, such as shallow chalk and salt, generate strong impedance contrasts that exhibit elastic effects, causing acoustic approximations to struggle. In parts of ...

A good estimation of velocity anisotropy is important in a pre-stack depth migration project in order to obtain proper focusing and accurate depthing of the seismic image. Considering that the velocity along the bedding is expected to be faster than across the bedding, the ...

With a new name and its guiding vision to “see things differently”, Viridien (formerly CGG) focuses on human ingenuity to usher in a bright future across multiple sectors.

Recent exploration activities within Paleocene and Eocene remobilized sands have proven the injectite play in the Northern Viking Graben (NVG). Wells targeting these sands have led to new discoveries such as Kveikje (2022) and Heisenberg (2023). This study proposes a robust methodology for detailed ...

Elastic full-waveform inversion (FWI) is now emerging as an industrial tool for the compressional velocity (Vp) model build, driven mainly by diving and reflected P waves. On the other hand, the inversion of S waves in elastic FWI to update shear velocity (Vs) models ...

In shallow water environments the presence of a hard water-bottom and near-surface geological complexities can give rise to strong guided-waves and other elastic effects in the recorded data. These effects can pose challenges for conventional full-waveform inversion (FWI) based on acoustic approximations, leading to ...

Geomechanical screening of potential CO2 storage sites in deep geological formations presents a substantial challenge, particularly in tectonically active regions like offshore Sarawak. In this study, we collect existing logs and downhole stress and pressure measurements to construct 1D mechanical earth models for three ...