AAPG Memoir 76, Chapter 5: The Role of Shale Pore Structure on the Sensitivity of Wire-Line Logs to Overpressure, by G. L. Bowers and T. John Katsube, Pages 43 - 60
from:
AAPG Memoir 76: Pressure Regimes in Sedimentary Basins and Their Prediction, Edited by Alan Huffman and Glenn Bowers
Copyright © 2001 by The American Association of Petroleum Geologists. All rights reserved.

Chapter 5
The Role of Shale Pore Structure on the Sensitivity of Wire-Line Logs to Overpressure

G. L. Bowers
Applied Mechanics Technologies
Houston, Texas

T. John Katsube
Geological Survey of Canada
Ottawa, Ontario, Canada

ABSTRACT

Petrophysical characteristics of shales have been analyzed to improve our understanding of wire-line log response to overpressure. Bulk density and neutron porosity logs sometimes mask pore-pressure increases that are clearly evident on sonic and resistivity logs. This may be because sonic and resistivity logs respond to transport properties, whereas neutron and density logs reflect bulk properties.