About This Item
Share This Item
Abstract
Chapter from: M
61: Basin Compartments and Seals
Edited by
Peter J. OrtolevaAuthors:
Debra Maucione, Vladimir Serebryakov, Paul Valasek, Yue
Wang, and Scott Smithson Methodology and Concepts
Published 1994 as
part of Memoir 61
Copyright © 1994 The American Association of Petroleum
Geologists. All Rights Reserved. |
|
---|
|
---|
|
Chapter 22
*
A Sonic Log
Study of Abnormally Pressured Zones in the Powder River Basin of WyomingDebra Maucione
Vladimir Serebryakov
Paul Valasek
Yue Wang
Scott Smithson
University of Wyoming
Laramie, Wyoming, U.S.A.
*
ABSTRACT
Most hydrocarbon production
from the Powder River basin in northeastern Wyoming is from an abnormally
pressured Cretaceous section. The preliminary identification and delineation
of abnormally pressured zones by surface seismic methods would greatly
enhance hydrocarbon recovery. The present velocity study shows the usefulness
of a detailed sonic log analysis to find abnormally pressured zones. Because
the conclusion of the log response study positively indicated the presence
of abnormal pressure, surface seismic data will also show these anomalies.
Velocity profiles, pressure profiles, and abnormal pressure-gradient calculations
all indicate that the Cretaceous shales are overpressured throughout the
basin, whereas the Cretaceous sandstones are present in overpressured,
underpressured, and normally pressured regimes. Pressure compartment boundaries
appear to be stratigraphically controlled. Three profiles in different
parts of the basin--T46N, R69-76W (Hilight field area), T51N, R69-77W (Amos
Draw-Kitty field area), and T41N, R69-76W (north of the Powell field area)--delineate
the top of overpressure near the Parkman Sandstone-Steele Shale contact
and the bottom seal along the Fuson Shale. |
---|
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