Technical Library

The authors describe how a simultaneous velocity and angle-dependent reflectivity inversion workflow (Ultima) can provide accurate and high-resolution attributes that could help derisk frontier...

This article was an original feature for the Wind Energy Network Magazine. Written by Nikhar Parikh, TGS - Issue 76: July 2024.

Noise is an ongoing issue in seismic processing and our capability to successfully process ocean bottom node data relies on our capability to successfully attenuate the presence of shear wave noise...

Amplitudes recorded by seismic receivers are usually clipped when the signal level exceeds the maximum signal that can be safely recorded by the instrument. Clipping leads to spectral leakage of...

Acoustic FWI has been widely applied in seismic work programs. The normal derivative of the FWI velocity model, which is known as the FWI Image, has been shown to provide a highly interpretable...

Acquisition of ocean bottom node (OBN) data in the vicinity of field infrastructure and concurrent rig activity, drilling, and adjacent seismic operations is challenging and requires careful planning...

Seismic velocity models derived via ray-based tomography and full waveform inversion (FWI) are typically non-unique, as the observed data may be explained by many possible models. Constraints may...

Sparse OBN acquisition can provide an efficient cost-effective method for acquiring seismic data over Carbon, Capture and Storage (CCS) sites. The authors demonstrate how using the full wavefield (P)...

Obtaining high-quality seismic images from Distributed Acoustic Sensing Vertical Seismic Profile (DAS VSP) data is challenging due to its limited subsurface spatial sampling and suboptimal data...

In this paper, the authors propose an elastic dynamic matching FWI (EDMFWI) as an extension of the acoustic algorithm. With the successful applications to variety of datasets, it demonstrates the...

In deep water Ocean Bottom Node (OBN) surveys, after wavefield separation, the downgoing dataset is most useful due to its superior illumination compared to the upgoing wavefield. However, the...

In this paper, the authors present FWI images from the recent FWI model and combine these with AVO intercept volumes to create a new attribute that can act as a screening tool to help understand...

Harnessing Cutting-Edge Technology for Sustainable Energy Solutions For over a century, Akershus Energi has been a front-runner in renewable energy, pioneering advancements since the completion of...

GeoStreamer X combines multi-sensor towed streamer broadband seismic fidelity and wide-tow source efficiency, with multi azimuth illumination. Earlier this year, PGS added a new GeoStreamer X dataset...

In this First Break article from June 2024, TGS experts Julien Oukili, Nick Lee, Martin Widmaier, Omar Baramony, Roberto Ruiz and Eric Mueller discuss the value of recent technological advances in...

The authors discuss the value of recent technological advances in seismic acquisition and processing for CCS site screening projects, using multiple case studies from offshore North-West Europe.

Versatile 3D seismic imaging to meet new energy demands starts with record-breaking acquisition solutions. A combination of wide-tow multi-source spreads and high-density multisensor streamer...

Recent technological advances in seismic acquisition and processing have proved valuable for CCS site screening projects. TGS authors describe a number of case studies from offshore North-West Europe...

New subsurface ultra-high-resolution 3D images give a glimpse of how efficiently acquired UHR3D geophysical data from TGS could revolutionize site characterization for the offshore wind industry.

Ramform Vanguard is sailing towards another impressive milestone in our GeoStreamer technology story. The ongoing 4D monitor survey offshore Angola is the fiftieth such GeoStreamer survey since TGS...

Using a simultaneous inversion of velocity and reflectivity on AVO compliant GeoStreamer data provides a high-resolution velocity model, relative impedance and relative density estimates to aid...

TGS’ new seismic processing workflow retrieves a velocity model and reflectivity image simultaneously and delivers accurate velocity models and reliable images faster. TGS Multi-Parameter FWI...

In this interview, Executive Vice President New Energy, Berit Osnes, and key members of her team tell us a bit more about what TGS is doing and why. The energy industry has 10 000 days to reach UN...

Seismic data processing, a complex and non-deterministic task, has traditionally faced challenges in separating signal from noise. Here we summarize the integration of machine learning (ML) into...

Traditionally, 4D monitoring is conducted with the acquisition of a monitor survey with the same acquisition configuration as the baseline. This can be costly and time-consuming. Geoscientists from...

On opposing sides of the Atlantic Ocean lie the Kwanza-Campos conjugate pair – exploration hotspots, remarkably similar, with a rich history of drilling successes and remaining running room for...

Chris Drage, SVP Sales & Services AMME, updates us on TGS' vast experience in Africa as we celebrate 30 years in the region. Over this time we have acquired over 250 000 sq. km of 3D and 75 000 km of...

A new GeoStreamer X dataset has been added to our extensive Norwegian Sea data library. It reveals exploration potential in undrilled structures and demonstrates that the Norwegian Sea is still...

A new GeoStreamer X early-out product is available now and provides high-resolution data to resolve imaging challenges in the Norwegian Sea, revealing remaining potential and derisking future...

Brazil's licensing regime has two permanent offer cycles for presalt and other blocks. The presalt potential of blocks in the prodigious Santos and Campos basins are offered through the sharing...