PGS starts next phase of Campos deepwater survey offshore Brazil

PGS has started acquisition of the latest phase of the Campos Deepwater GeoStreamer X, a prefunded multiclient 3D seismic survey with multi-azimuth coverage. In December PGS started to acquire an additional 8400 km2. 

The vessel Ramform Titan is being configured with 14 multisensor streamers, each 10.05 km long, the largest spread ever towed offshore Brazil. This configuration minimizes the number of source points per square kilometre and reduces the number of acquisition days, said PGS. 

This survey will provide the first 3D seismic data over blocks offered in the upcoming 17th Bidding Round, now scheduled for October 2021. 

The Campos Deepwater GeoStreamer X project combines new and legacy 3D data delivering long-offset, multi-azimuth seismic data over the deepwater portion of the northern Campos Basin. 

The survey area includes presalt open acreage adjacent to Albacora and Marlim Leste fields and areas acquired and under contract in the 14th Bidding Round, with drilling operations underway to test large presalt structures. 

The tailored acquisition configuration for the GeoStreamer X project will provide 10-km long offsets to improve depth velocity modelling accuracy of the post-salt, salt, and presalt sections, facilitated by the use of full wave-form inversion. 

FWI modelling results indicate these long offsets will aid in derived velocity accuracy in the presalt section. These additional offset data also promise added angle range and improved signal/noise for seismic amplitude analysis and reservoir characterization. Multi-azimuth processing and velocity model building will improve illumination and image quality of the subsurface structures found within the presalt play in this portion of the Campos Basin. 

Phase 1 imaging will be available in Q1 2021, providing final multi-azimuth products over open pre-salt acreage, including TTI Kirchhoff and RTM (45 Hz) PSDM products.