Alcazar-Cancino, L. Octavio1, J. Manuel Rodriguez-Dominguez1,
Luis Robles-Vega1
(1) Activo Integral Poza Rica - Altamira, Pemex E&P, Poza Rica, Mexico
ABSTRACT: Exploitation of the Chicontepec Turbiditic Plays, Central Mexico
The reactivation of oil recovery activities from the Chicontepec Tertiary sandstones is
one of the most important projects of the strategic business plan of Pemex due to the
geographic location and geological conditions of the proven reserve of 653.6 MMboe and
probable reserve of 9,808 MMboe.
The Chicontepec project covers an area of 3,815 km2 in northern Veracruz. The reservoir
sands have been interpreted as deep water fan turbidite deposits based on core and log
analysis from exploration wells. A regional unconformity separating the north and central
reservoirs from the south reservoirs has been identified with 2D seismic. Until now,
prediction of the distribution of stacked fans has been made on the limited area with 3D
seismic, but new acquisition will extend to the main prospective areas and fields. Eocene
channelized and fan turbidite sandstones are the main plays. Gross sandstone thickness
varies from 50 to 500 m, net pay of 30-40 m, 8-12% porosity, permeability from 0.1 to 10
md, and hydrocarbon saturation from 50 to 60%.
Recovery factor in these highly heterogeneous plays is 7%. Producing oil 19-45°API from
multiple zones requires the integration of a multidisciplinary team and applying the best
practices and technology for development and secondary recovery. Macro platforms from
which 19 low-angle multitarget wells can be drilled have been designed for this project.
If necessary, and depending on performance, each well can have up to 3 fracture zones to
enhance artificial production systems and, in the future, apply secondary recovery
techniques.
AAPG Search and Discovery Article #90026©2004 AAPG Annual Meeting, Dallas, Texas, April 18-21, 2004