Technical Library

Hydrocarbon prospectivity in the eastern Mediterranean is challenged by the presence of the Messinian salt layer, which varies in complexity across the area. The macro salt layer geometry itself...

There are many dynamic forces that can mask subtle reservoir signals, but a series of engineering innovations render TGS 4D GeoStreamer surveys relatively insensitive to them.

Every exploration manager knows estimates are more reliable if they use better data. Multisensor GeoStreamer acquisition provides three key platforms for seismic imaging. TGS advanced imaging...

We present a method using separated wavefield imaging to mitigate risk associated with well drilling. In shallow water environments the process of geohazard assessment is challenging. Conventional...

Understanding the influence of porosity on elastic properties through rock physics analysis is essential in seismic reservoir characterisation and key in the context of the chalk play. It is known...

Broadband data can reveal significant hydrocarbon potential in the Viking Graben area by providing superior images of complex structures like injectites.

Converted waves can be recorded in a marine environment in the presence of large velocity contrasts, like a salt body. Salt-related converted waves can significantly contaminate P-wave image. The...

In this paper we discuss the ability to correct for shot to shot source signature variations and show how this could impact current survey source specifications. Contractual survey specifications...

In this paper, we present real data applications of the acquisition and processing method outlined in the companion paper (Hegna, S., Kluver, T., and Lima J., 2018, Making the transition from...

A method that extracts the response of the earth from continuous wavefields on both the source and the receiver side is presented. Seismic data recorded continuously are treated over the entire time...

A spread spectrum sweep strategy is described that enables efficient and flexible opportunities for towed marine vibrator seismic surveys capable of generating arbitrary signals with full phase...

A 4D broadband assessment has been performed in a deep offshore West Africa environment using repeated dualsensor streamer acquisitions. Three sail lines have been re-acquired only a few weeks after...

We present a method for imaging with separated wavefields from an ocean bottom cable acquisition to deliver images of the subsurface with enhanced illumination and angular diversity. Using this data,...

Triple source can improve data quality with better crossline sampling compared to standard dual source for a given streamer separation. Alternatively, if the crossline sampling is kept the same,...

By the end of 2018 TGS will have acquired a total of 45,000 km2 of high resolution 3D seismic across the Møre and Vøring Basins in the Norwegian Sea. This article summarises how the project has...