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Площадь: 69616.24 км²
Lusitanian Basin
The studied petroleum system, the Cabaços-Abadia of the Lusitanian Basin, involves the generation of petroleum by the shallow water transitional marine sediments of the Cabaços Oxfordian Formation (Neo-Jurassic) (Figure 1), composed of marly limestones deposited in lake, lagoon and coastal environments. TOC values range between 2% and 5% (up to 30%), with a type III kerogen dominance.
Figure 1. Chronolitostratigraphic chart of the Lusitanian Basin, adapted from Pena dos Reis and Pimente
The oil migrated to Kimmeridgian (Upper Jurassic) turbidite sandstones belonging to the Abadia Formation (Figure 1). This petroleum system was tested as a target in several exploratory wells drilled in the onshore of the Lusitanian Basin, in the Arruda, Turcifal and Bombarral sub-basins, in the central part of the basin. The hydrocarbons generated in the Cabaços Formation also migrated to the overlapping fractured Oxfordian marine limestones of the Montejunto Formation and to intervals with potential reservoir of the microbiolites of the Cabaços Formation.
The simplified petroleum systems of the Lusitanian Basin are presented in Figure 2, below. The studied petroleum system of Cabaços-Abadia in the case study is shown inside the blue dotted line.
Figure 2. Simplified petroleum systems of the Lusitanian Basin. The Cabaços-Abadia petroleum system is shown within the blue dotted line, referring to the third petroleum system, adapted from Pena dos Reis and Pimentel. The oil is generated in the marly limestones of the Cabaços Formation and migrates to the turbidite sandy reservoirs of the Abadia Formation (modified).
Data source:Petroleum Systems Analysis of Turbidite Reservoirs in Rift and Passive Margin Atlantic Basins (Brazil and Portugal). Gustavo Santana Barbosa, Rui Pena dos Reis, Antônio Jorge Vasconcellos Garcia, Gabriel de Alemar Barberes, Gustavo Gonçalves Garcia, 2022
Следующий Бассейн: Liguria - Provencal