Skip to Main Content
Book Chapter

Petrology and Diagenesis of Deep-Water Sandstones, Ouachita Mountains, Arkansas and Oklahoma

By
Robert C. Morris
Robert C. Morris
Search for other works by this author on:
Kenneth E. Proctor
Kenneth E. Proctor
Search for other works by this author on:
Michael R. Koch
Michael R. Koch
Search for other works by this author on:
Published:
January 01, 1979

Abstract

The Stanley and Jackfork Groups of the Ouachita Mountains consist of 18,000 feet of interbedded sandstones and shales deposited during the Late Mississippian and Early Pennsylvanian. Interest in their hydrocarbon potential has led to study of textures, compositions, and diagenetic alterations of these sandstones. The data and conclusions presented in this study are based on petrographic examination and porosity and permeability measurements of 187 samples collected from outcrop.

The Stanley sandstones are generally poorly sorted, very fine-grained feldspathio- and quartz wackes. They average 8% feldspar, 14% matrix, and 5% silica cement. Porosities range from 0.5-26% and permeabilities from 0.05-23 md.

Jackfork sandstones are predominantly moderately to poorly sorted, fine- to very fine-grained quartz arenites. They contain an average of 2% feldspar, 5% matrix, and 9% quartz cement. Porosities range from 0.5-14% and permeabilities from 0.05-9 md.

Pressure solution, silica cementation, and replacement of plagioclase by calcite have acted to reduce reservoir potential in both units, whereas corrosion and dissolution of framework grains have added secondary porosity. The presence of halloysite and kaolinite characterizes sandstones affected by surface leaching. Well sorted quartz arenites have poor reservoir quality as a result of extensive silica cementation. Characteristics associated with the retention or secondary development of reservoir potential include poor sorting, small mean grain sizes, and high matrix content.

You do not currently have access to this article.

Figures & Tables

Contents

SEPM Special Publication

Aspects of Diagenesis

Peter A. Scholle
Peter A. Scholle
Search for other works by this author on:
Paul R. Schluger
Paul R. Schluger
Search for other works by this author on:
SEPM Society for Sedimentary Geology
Volume
26
ISBN electronic:
9781565761568
Publication date:
January 01, 1979

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