Offshore staff
OSLO, Norway – PGS’ vessel Ramform Titan has completed acquisition on the first two parts of a new long-offset GeoStreamer-X seismic survey in the Campos basin offshore Brazil.
The Ramform Titan set a record by towing the largest acquisition spread ever deployed in Brazil with a 14 x 100 x 10,050 m, dual-sensor, dual-source configuration, the company said.
The vessel completed acquisition of the 6,500 sq km (2,510 sq mi) area ahead of schedule, with an average production of 80 sq km (31 sq mi) per day. The first phase of the program was completed without a crew change due to the offshore logistical challenges during the COVID-19 pandemic.
The Campos Deepwater GeoStreamer X program targets Campos basin presalt open acreage, areas acquired in the 14th Bidding Round, and open acreage offered in the 17th Bidding Round, scheduled for early next year.
The western part of the survey targets presalt open acreage. The multi-azimuth products will include ~3,000 sq km (1,158 sq mi) of TTI Kirchhoff and both single and multi-azimuth RTM (45Hz) PSDM products. Full Integrity PSDM products are expected to be available 2Q 2021.
The eastern part targets the deepwater open acreage to be offered in the upcoming 17th Bidding Round. Fasttrack PSDM products are expected to be available through 3Q and 4Q 2020. Full-integrity PSDM products are expected to be available in 2021, including KPSDM and 45 Hz RTM.
The survey will cover an area of about 14,500 sq km (5,598 sq mi) and overshoot the company’s existing orthogonal multi-client 3D currently being reprocessed in parallel.
This new GeoStreamer X project will provide 10 km (6 mi) long offsets to improve depth velocity modeling accuracy of the post-salt, salt and presalt sections, facilitated using the company’s full waveform inversion technologies.
These additional offset data also promise added angle-range for presalt seismic amplitude analysis and reservoir characterization, the company said. Incorporating the newly reprocessed orthogonal MC3D datasets (8 km offsets) will provide a multi-azimuth solution, enabling improved illumination of the subsurface structures found within the presalt plays in this portion of the Campos basin.
John Cramer, New Ventures Manager for Brazil, said the remaining phase is expected to be completed next year.
06/17/2020
