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Book Chapter

Classification and Origin of Petroleum in the Mexican Gulf Coast Basin: An Overview

By
Mario A. Guzmán-Vega
Mario A. Guzmán-Vega
Instituto Mexicano del Petróleo, Mexico City
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Lilia Castro Ortíz
Lilia Castro Ortíz
Instituto Mexicano del Petróleo, Mexico City
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Juan R. Román-Ramos
Juan R. Román-Ramos
Petróleos Mexicanos, Mexico City, Mexico
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Luis Medrano-Morales
Luis Medrano-Morales
Petróleos Mexicanos, Mexico City, Mexico
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Lourdes Clara Valdéz
Lourdes Clara Valdéz
Petróleos Mexicanos, Mexico City, Mexico
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Emilio Vázquez-Covarrubias
Emilio Vázquez-Covarrubias
Petróleos Mexicanos, Mexico City, Mexico
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Genaro Ziga-Rodríguez
Genaro Ziga-Rodríguez
Petróleos Mexicanos, Mexico City, Mexico
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Published:
January 01, 2001

Abstract

A geochemical and isotopic characterization of a wide selection of the produced oils in the petroleum subprovinces from the Mexican Gulf Coast Basin has revealed five major genetic groups. Their distribution and chemical features appear to reflect multiple sources, fades variations, maturation, and postfilling alteration processes. Each group is correlated with a specific generative source, namely (1) Oxfordian marine marl-dominated, (2) Oxfordian marine carbonate-dominated, (3) Tithonian marine marl-dominated, (4) Cretaceous marine carbonate-evaporitic, and (5) Tertiary marine deltaic siliciclastics.

Biomarker and isotope differences observed in the Tithonian oils can be interpreted in terms of facies variations. The Tithonian generative subsystem has produced more than 80% of all oil reserves from the Mexican Gulf Coast Basin. Oil reserves have accumulated both onshore and offshore and throughout the stratigraphic column from Kimmeridgian to Pleistocene in marine-siliciclastic and carbonate reservoirs, suggesting that vertical pathways are an important secondary migration mechanism.

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Contents

Memoir - AAPG

The Western Gulf of Mexico Basin: Tectonics,Sedimentary Basins, and Petroleum Systems

Claudio Bartolini
Claudio Bartolini
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Richard T. Buffler
Richard T. Buffler
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Abelardo Cantú-Chapa
Abelardo Cantú-Chapa
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American Association of Petroleum Geologists
Volume
75
ISBN electronic:
9781629810638
Publication date:
January 01, 2001

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