TDI-Brooks International has completed the offshore multibeam phase offshore the Niger Delta for client TGS.
TDI-Brooks International has completed the offshore multibeam phase offshore the Niger Delta for client TGS. This survey took place in water depths of 750 to 3500 m and is Nigeria’s first regional multi-client Multibeam and Seafloor Sampling (MB&SS) study.
The TDI-Brooks vessel R/V Gyre acquired 82,000 km2 of high-resolution hull-mounted multibeam echo sounder data. During the multibeam data collection a total of 1223 active hydrocarbon seeps were detected in the multibeam water column data. Onboard hydrocarbon seep analysis was conducted in near real-time onboard the vessel to expedite the process of core selection. The Gyre is fitted with an EM302 MBES (EM304 upgrade pending).
The R/V Proteus is scheduled to begin acquisition of the follow-up Surface Geochemical Exploration (SGE) coring campaign in July 2020, where approximately 245 piston core samples targeting suspected seep features selected from the MBES dataset will be collected, along with an additional 45 additional piston core samples for geotechnical and biostratigraphic studies. An additional 17 surface heat flow measurements will also be collected as part of the programme.
TDI-Brooks’ interpretation of survey results is aided by comparison with its worldwide database of SGE survey results from 100,000+ samples it has collected, analysed, and interpreted over the years. The process consists of the following sequential steps: core site selection, core acquisition, laboratory analysis and interpretation.
Upon completion of analyses, geochemical data are combined with geophysical and geological datasets to provide insight into migrated hydrocarbons, their type and maturity.
