Ceará and Potiguar
Detection and Characterization of Natural Oil Seeps and Oil Slicks in the Deep and Ultra Deep Water of Ceara and Portiguar Basins, using Piston Core and Radar SAT 1&2 and ENVISAT data
Multiclient studies available for the upcoming Bidding Rounds
The use of Radarsat and Envisat Asar images processed together with meteorological and oceanographic data in the offshore of Rio Grande do Norte and Ceará states showed the presence of many oil slicks, widespread in water depth areas ranging from 5 m to 3576 m. Most of the identified oil slicks are considered indications of 100% of probability to occur as a result of the convergence of the optimum tectonic, temporal and environmental scenarios, and confirms the presence a prolific and active petroleum system in the subsurface of the investigated area.
The geochemical gas and oil results – headspace gas and GC-MS of saturate and aromatic biomarkers – from piston core data collected in the Mundaú sub-basin (in the Ceará Basin) revealed the presence of liquid biomarkers in some cores and in several other cores, the study detected very consistent thermogenic oil and gas signatures.
The occurrence of oil slicks detected hydrocarbon at levels of micro seepages indicating that .hydrocarbons migrated and reached the sea bottom sediments. These data provide valuable information and allows a positive assessment of lease areas aiming hydrocarbon exploration activities in this frontier offshore area.
Full references of all images are listed in the reports