About This Item
- Full TextFull Text(subscription required)
- Pay-Per-View PurchasePay-Per-View
Purchase Options Explain
Share This Item
The AAPG/Datapages Combined Publications Database
AAPG Special Volumes
Abstract
2003. The American Association of Petroleum Geologists. All rights reserved.
Gas Generation Potential of Upper Jurassic (Tithonian) Source Rocks in the Sonda de Campeche, Mexico
Demetrio Santamar
a-Orozco,1 Brian Horsfield2
a-Orozco,1 Brian Horsfield21Instituto Mexicano del Petr
leo, Exploracin, Mexico City, Mexico
2GeoForschungsZentrum, Potsdam, Germany
ACKNOWLEDGMENTS
We want to acknowledge the support of the Institute of Petroleum and Organic Geochemistry (ICG-4) of Forschungszentrum J
lich, Germany; the Marine Region Exploration division of Mexican Petroleum (Pemex); and the Exploration Division of the Mexican Petroleum Institute (IMP). Personal thanks are extended to Rolando di Primio for valuable discussions; to Franz Leistner and Maria de Jes
s Saucedo-Garc
a for expert technical support; to Mara A. Romero-Ibarra, Noel Holgun-Qui
ones, and Baldomero Carrasco-Vel
zquez, who authorized the supply of rock samples and geological information; and to Dietrich H. Welte and Ral Gonzles-Garca (formerly with ICG-4 and Pemex, respectively) who initiated this cooperation between the Mexican and German partner organizations.
ABSTRACT
In the Sonda de Campeche offshore region of Mexico, the Tithonian sedimentary sequence is the most important source of hydrocarbons that occur today in Paleocene traps. The maturity of both source rocks and petroleum in reservoirs is known to increase from northeast to southwest across the region. This is manifested at the molecular level and in bulk petroleum properties such as API gravity and gas-oil ratio (GOR). We have analyzed a selection of source-rock samples from across the area, covering the entire maturity spectrum, by pyrolysis gas chromatography. These data give insights into the GOR of yet-to-be-generated petroleum for each maturity stage. A mass-balance model based on these same data and complementary data from laboratory experiments (MSSV pyrolysis) provided cumulative GOR as a function of generation stage (transformation ratio). Regional field GOR trends are consistent with instantaneous rather than cumulative GOR predictions, thereby supporting the notion of mainly localized vertical migration avenues in association with a late timing of trap formation.
Pay-Per-View Purchase Options
The article is available through a document delivery service. Explain these Purchase Options.
| Watermarked PDF Document: $14 | |
| Open PDF Document: $24 |