In this paper we present a new source-over-cable marine seismic acquisition technique that initially was developed to meet imaging challenges of the Loppa High in the Norwegian Barents Sea. Two seismic vessels operate in tandem; one streamer vessel towing a spread of deep, densely ...
We demonstrate a recently developed method for computing tomography model uncertainties and mapping them into the migrated domain. The method generates after the final tomography a series of equi-probable velocity model perturbations within a standard deviation confidence level. This allows computing standard deviation-like attributes ...
Self-published 12-page White Paper on the subject of National Data Repositories. Distributed at NDR conference in June 2017.
3500 km2 of marine data from West of Shetlands have been reprocessed using latest processing technologies available (including deghosting). This case study demonstrates the benefit to re-process conventionnal data (acquired in the 90's) to get a broadband result (better definition, larger spectrum).
We propose a laterally constrained surface wave inversion to obtain a reliable near-surface shear-wave velocity field from Rayleigh wave measurements. This workflow is targeted at dense 3D broadband Wide-Azimuth land surveys, aiming to obtain reliable and realistic lateral shear-wave velocity variations pertinent with regard ...
A broadband Wide-Azimuth Towed-Streamer (WATS) survey was acquired in a shallow water region of offshore China for the purpose of resolving strike direction narrow-azimuth acquisition shortcomings. However, the current WATS acquisition is much sparser than WATS surveys in deep water environments. The challenges of ...
Conventional Full Waveform Inversion (FWI), mostly based on diving-waves, has become a standard velocity model building tool. Using a dataset from the deep water on the Mexican side of the Gulf of Mexico (GoM), we show that FWI can be effective at resolving different ...
This paper presents leanings from the 2015 and 2016 North Sea acquisition season with regards to acquiring data with lots of seismic interference noise.
Kaskida is a large three-way reservoir underneath a complex salt body and truncated by a salt weld. Seismic imaging at the reservoir level is impacted by the inhomogeneous illumination from the complex overburden, which distorts the amplitude of reservoir reflectors and generates lots of ...