Syn-Rift Systems Evolution of the Cuban Northwest Offshore (Deep Waters)
Sanchez, Jorge R.1, Fabrice Gaumet2, Jean Letouzey2, Isabelle Moretti2, Jean-Claude Lecomte2, Caroline Magnier2, S. Zimine3, José O. Lopez1, Juan G. Lopez1 (1) Centro de Investigaciones del Petroleo (CEINPET), Havana, Cuba (2) Institut Français du Pétrole, Rueil Malmaison Cedex, France (3) Compagnie Générale de Géophysique, Massy, France
This contribution presents the syn-rift tectono-paleogeographic evolution of the southeastern Gulf of Mexico (Cuban North-West offshore) by using seismic stratigraphy and the input of Cuban geology where is recorded in outcrops and wells.
The seismic stratigraphy interpretation is based on a detailed analysis of multifold seismic data of the CGG survey carried out in the year 2000.
Two tectono-stratigraphic phases are considered: a) Syn-rift
system JI (Lower Jurassic to Middle Jurassic), in relation with the rifting
stage between Laurentia (North American plate) and Gondwana (South American and
African plates); it ended with late-rift Callovian salt deposits, mainly
developed in the Gulf of Mexico and along the proto-Caribbean margin too. b)
Syn-rift system JII (Oxfordian to Berriasian),which
corresponded to the ocean spreading in the
The sequence A was formed during the syn-rift system I, while
the syn-rift system II started with the deposition of sequence C. The syn-rift
character of sequence A (Upper Triassic?-Mid Jurassic?) is evidenced in the
northern Central basin, as along the
The sequence B (Callovian) is thin to the north and only
deposited in two restricted marine intra-continental basins. Hyper-saline
conditions prevailed during the sequence B deposition. A thicker unit extends
There are evidences of the potential of a deep petroleum system in the silici-clastic rift sequence. The shales from the Middle Jurassic syn-rift section appear to have an initial good potential.