Print this pageCuevas Leree, Antonio1, Rogelio Muñoz-Cisneros2, Pedro
Silva-Saldivar2, Victor Hugo De la Rosa-R2, Esmer O. Rivas-R2,
Jesus Gonzalez-O2, Ramiro Fernandez-Turner2
(1) Activo Regional de Exploracion, Pemex E&P, Poza Rica, Ver, Mexico
(2) Activo Integral Burgos, Pemex E&P, Reynosa, Tamps, Mexico
ABSTRACT: A New Upper Oligocene Oil Play in the Southern Burgos Basin, Mexico
The discovery of oil in a new play of Upper Oligocene shoreface sandstones has
increased prospectivity of the Tertiary in the southern part of the Burgos Basin. This
clastic succession was deposited by a deltaic system that had a sediment dispersion
pattern not related to the Rio Grande Embayment but to uplifted terrains along the Sierra
Madre Oriental Thrust Belt. Geochemical modeling indicates a Tithonian origin for the oil
and the existence of a generation kitchen adjacent to the discoveries, implying migration
of light oil (46° API) over a few kilometers. The listric faults that have contributed to
the formation of traps have also been the main migration pathways connecting source rocks
to traps.
The tested intervals are fine-grained sandstones with a gross thickness of 600 meters,
lying at 2600 to 2900 m below sea level. Porosity and 
permeability
are between 11 and 17%
and 0.5 to 21 milidarcys, respectively. Sandstone resistivity typically varies from 2 to
10 ohm-m. These rocks produce at estimated rates of 4000 bopd and 9 MMscfd of gas.
Original potential resource estimation
of the prospect is close to 100 MMboe. According to
play analysis of the region, this Upper Oligocene play could have up to 5000 km2
of prospective area.
AAPG Search and Discovery Article #90026©2004 AAPG Annual Meeting, Dallas, Texas, April 18-21, 2004.