CGG has won a contract from Equinor for the seismic imaging of its Bacalhau 3D ocean bottom node (OBN) survey covering 409 km 2 currently being acquired in Brazil’s deepwater Santos Basin.
CGG has won a contract from Equinor for the seismic imaging of its Bacalhau 3D ocean bottom node (OBN) survey covering 409 km2 currently being acquired in Brazil’s deepwater Santos Basin.
Final products for the fully imaged dataset were expected to be delivered within ten months of the survey being scheduled to complete in May 2021.
The project is already underway at CGG’s Rio de Janeiro subsurface imaging centre using proprietary imaging technologies, including reverse time migration, time-lag full-waveform inversion (TLFWI) and interbed multiple attenuation, to address pre-salt illumination challenges caused by the presence of very thick stratified salt.
‘Combining OBN data with TLFWI will result in more detailed and reliable velocity model building and imaging, bringing geological insight at post-salt, intra-salt and, most importantly, at pre-salt levels,’ said CGG. ‘The resulting high-quality subsurface image will reduce uncertainties and enable a better structural interpretation to guide future drilling plans and development of the world-class Bacalhau field.’
