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Characterization of Northern California petroleum by stable carbon isotopes

Open-File Report 99-164

By:
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Abstract

The purpose of this study is to characterize natural occurrences of petroleum at the surface and in the subsurface within northern California in order to define and map petroleum systems for U.S. Geological Survey energy resource assessments. Furthermore, the chemical characterization and mapping of natural petroleum occurrences could also be used to discriminate natural occurrences from accidental oil spills during the activities of extraction or transportation of petroleum. Samples include petroleum from exploratory well tests, producing fields, natural seeps, and oil-stained rocks, and condensates from gas wells. Most of the sample localities are in northern California but a few samples from central and southern California are included for comparison (table 1). Even though other analyses were performed, only stable carbon isotope (δ13C) data are presented here for brevity and because δ13C values are one of the most discriminating characteristics of California petroleum.

Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Characterization of Northern California petroleum by stable carbon isotopes
Series title:
Open-File Report
Series number:
99-164
Year Published:
2001
Language:
English
Publisher:
U.S. Dept. of the Interior, U.S. Geological Survey
Publisher location:
Reston, VA
Description:
19 p.
Country:
United States
State:
California