About This Item
Share This Item
Abstract
Chapter from: M
61: Basin Compartments and Seals
Edited by
Peter J. Ortoleva Authors:
Zuhair Al-Shaieb, James O. Puckette, Azhari A. Abdalla,
Vanessa Tigert, and Peter J. OrtolevaMethodology and Concepts
Published 1994 as
part of Memoir 61
Copyright © 1994 The American Association of Petroleum
Geologists. All Rights Reserved, |
![](images/indent.JPG) |
---|
![](images/indent.JPG) |
---|
![](images/indent.JPG) |
Chapter 23
*
The Banded
Character of Pressure SealsZuhair Al-Shaieb
James O. Puckette
Azhari A. Abdalla
Vanessa Tigert
Oklahoma State University
Stillwater, Oklahoma,
U.S.A.
Peter J. Ortoleva
Indiana University
Bloomington, Indiana,
U.S.A.
*
ABSTRACT
Pressure seals in the Anadarko
basin contain distinct diagenetic bands that play a significant role in
the isolation of high-pressure domains. Both sand-rich and clay-rich clastic
rocks exhibit banding patterns. Banding in sandstones results primarily
from the processes of pressure solution, pore-fluid interaction, and precipitation.
Some banding patterns in clay-rich rocks appear to form independently of
sedimentary textures while others result from the enhancement or modification
of sedimentary features. All of these bands are noticeably absent in rocks
that were never buried deeply enough to be overpressured.
Diagenetic bands in sandstones consist
of silica- and carbonate-cemented layers that are separated by clay-coated
porous layers. Stylolites and other pressure-solution features such as
penetrating grain boundaries suggest a mechanism for the derivation of
silica cements.
Diagenetic bands in clay-rich rocks appear
to have two distinctly different origins. In the Pink/Red Fork interval,
diagenetic chlorite bands exhibit no apparent relationship to sedimentary
features. The chlorite bands have less porosity and smaller pore-aperture
radii than the surrounding shale (Powers, 1991). In the Woodford Shale,
silica- and clay-rich bands develop via the diagenetic modification or
enhancement of sedimentary features. |
---|
Pay-Per-View Purchase Options
The article is available through a document delivery service. Explain these Purchase Options.
Watermarked PDF Document: $14 |
Watermarked Document A Watermarked Document is branded with the name of the original licensed customer to discourage unauthorized users from sharing the document outside the user's organization. The PDF is no longer restricted to one machine, but can be circulated to others in the same company or department. A Watermarked Document also can be printed for hard copy distribution internally but is not authorized for outside distribution nor posting on the internet. Users will not be able to cut-and-paste text or images from one document to another.
|
Open PDF Document: $24 |
Open Document An Open Document is a fully functional PDF that can be circulated (a digital copy or hard-copy printed documents) outside the purchasing organization. Purchase of an Open Document does NOT constitute license for republication in any form, nor does it allow web posting without prior written permission from AAPG/Datapages ([email protected]).
|
GIS Map Publishing Program