[2] In April 2022, Petro Rio (through its subsidiary Petro Rio Jaguar Petróleo), acquired a 90% operating stake in the Albacora Leste field Petróleo Brasileiro (Petrobras) for $2.2bn USD.
[3] The Albacora field consists of several producing horizons of Albian to Miocene sandstone turbidites, with an area of 235 km2.
[4]: 124 Reflection seismology in 1972 disclosed a faulted anticline and seismic amplitude bright spot, which was drilled by wildcat 1-RJS-297 in 1984 and discovered oil.
[4]: 126 The stratigraphy of the Campos Basin starts with the Lower Cretaceous Lago Feia Formation a source rock, followed by the Albian Macae Formation consisting of shallow water carbonates overlain by late Albian shales, marls, calcilutites, and turbidite sandstones.
[4]: 129 Finally, the basin was filled by the Ubatuba Formation, consisting of slope and shelf deposits.