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The AAPG/Datapages Combined Publications Database

AAPG Special Volumes

Abstract

Chapter from:
AAPG Memoir 67: Seals, Traps, and the Petroleum System, Edited by R. C. Surdam
(Publication Subject: Oil Methodology, Concepts)
AAPG Memoir 67: Seals, Traps, and the Petroleum System. Chapter 4: Delineation of a Pressure Fault Seal From Shale Resistivities, by James C. Niemann and Mark R. Krolow, p. 49-55

Copyright © 1997 by The American Association of Petroleum Geologists. All rights reserved.

Chapter 4

Delineation of a Pressure Fault Seal From Shale Resistivities

by

James C. Niemann and Mark R. Krolow
Chevron USA Production Co. New Orleans, Louisiana, U.S.A.

ABSTRACT

Pressure differentials between fault blocks are definitive evidence of a fluid seal across faults. A method is proposed for using log-derived and calculated pressure Previous HitgradientTop values to correlate and map pressures on cross sections to delineate pressure differentials across fault zones. These values were calculated and mapped along a known hydrocarbon sealing fault inferred to be a pressure seal in a field from the Gulf of Mexico. The results indicate that this method can generate a detailed picture of the fluid and pressure history to aid in the documentation and prediction of sealing or leaking relationships along fault zones.

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