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The AAPG/Datapages Combined Publications Database

AAPG Special Volumes


Pub. Id: A077 (1994)

First Page: 93

Last Page: 120

Book Title: M 60: The Petroleum System--From Source to Trap

Article/Chapter: Applied Source Rock Geochemistry: Chapter 5: Part II. Essential Elements

Subject Group: Oil--Methodology and Concepts

Spec. Pub. Type: Memoir

Pub. Year: 1994

Author(s): Kenneth E. Peters (*), Mary Rose Cassa


Applied organic geochemistry provides the information needed to make maps of the richness, type, and thermal maturity of a source rock. These maps are a necessary step toward determining the stratigraphic and geographic extent of a pod of active source rock in a petroleum system, and they are based on geochemical analyses of rock samples from outcrops and wells that are displayed on logs. These geochemical well logs are based on Rock-Eval pyrolysis, total organic carbon, vitrinite reflectance, and other rapid, inexpensive "screening" methods. The logs define (1) potential, effective, and spent petroleum source rock; (2) the thermal maturation gradient, including immature, mature, and postmature zones, and (3) in situ and migrated petroleum shows. Useful geochemic l logs require proper sample selection, preparation, Previous HitanalysisTop, and interpretation. Detailed studies, including oil-source rock correlations by biomarker and supporting techniques, are undertaken on selected samples only after the screening methods are completed.

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