Skip to Main Content
Book Chapter

Kerogen Maturity and Type by Reflected Light Microscopy Applied to Petroleum Exploration

By
Wallace G. Dow
Wallace G. Dow
Robertson Research (US) Inc
. Houston, Texas 77060
Search for other works by this author on:
Dolores I. O’ Connor
Dolores I. O’ Connor
Robertson Research (US) Inc
. Houston, Texas 77060
Search for other works by this author on:
Published:
January 01, 1987

Abstract

One of the best ways to study disseminated organic matter in sedimentary rocks is with reflected light microscopy. The technique includes the familiar vitrinite reflectance method for maturity determination as well as kerogen type identification, which more commonly is carried out under transmitted light. Reflected light analysis can be applied over the entire maturity range from Recent sediments to metamorphic rocks whereas transmitted light analysis loses effectiveness in the higher maturity ranges.

The principal advantage of optical methods of kerogen analysis is the ability to discriminate the various components of sedimentary organic matter and to provide the dimension of source bed history to geochemical studies. The various chemical methods of analysis reveal only the present condition of the average kerogen mixture. The best results are obtained when subjective optical studies are used in combination with objective chemical data.

Maturity analysis is essential in revealing whether oil and gas have been generated in source rocks and preserved in reservoirs. It can also be used effectively to help understand the geologic and tectonic history of basins. Kerogen type analysis is required to identify whether a source bed is capable of generating oil or gas. Other applications include determining depositional environments, diagenetic history, provenance of sedimentary debris, and the presence of contamination from caving or drilling mud additives.

You do not currently have access to this article.

Figures & Tables

Contents

SEPM Short Course Notes

How to Assess Maturation and Paleotemperatures

F. L. Staplin
F. L. Staplin
Search for other works by this author on:
W. G. Dow
W. G. Dow
Search for other works by this author on:
C. W. D. Milner
C. W. D. Milner
Search for other works by this author on:
D.I. O’Connor
D.I. O’Connor
Search for other works by this author on:
S.A.J. Pocock
S.A.J. Pocock
Search for other works by this author on:
P. van Gijzel
P. van Gijzel
Search for other works by this author on:
D.H. Welte
D.H. Welte
Search for other works by this author on:
M.A. Yükler
M.A. Yükler
Search for other works by this author on:
SEPM Society for Sedimentary Geology
Volume
7
ISBN electronic:
9781565762367
Publication date:
January 01, 1987

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal