Fluorescencia y cambios texturales del cemento carbonático como indicadores de cambios fisicoquímicos durante la diagénesis de la Formación Portezuelo Grupo Neuquén

PONS M.J.; CESARETTI N.; RAINOLDI A.L.

San Juan

Congreso; XI Congreso de Mineralogía y Metalogenia; 2013

UNSJ, AMA

The Barda Gonzalez region located in the Dorsal de Huincul structure of the Neuquén Basin, is characterized by the occurrence of oil fields and regional structures at depth and the presence of solid hydrocarbons impregnating the outcrops of the Cretaceous (LateTuroniano -Early Coniaciano) fluvial rocks of the Portezuelo Formation (Neuquén Group: Cenomanian-Campanian). Some of the structures of the Huincul system were reactivated during the Tertiary Andean orogeny, and acted as vertical channels connecting the reservoir fluids with the subhorizontal paleochannel of the Portezuelo Formation. The circulation of these fluids in the clastic rocks is documented by the presence of bitumen associated with calcite. This presentation establishes the relationship between the diagenetic processes, the migration of hydrocarbons and their implication in the calcite mineral precipitation.