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Abstract


 
Chapter from: SG 42:  Applications of 3-D Seismic Previous HitDataNext Hit to Exploration and Production

Edited by: 
Paul Weimer and Thomas L. David

Author:
Joseph A. Cartwright


Published 1996 as part of Studies in Geology 42
Copyright © 1996 The American Association of Petroleum Geologists.  All Rights Reserved.
 

*Editorial Note: Page numbers in this digital version (HTML and PDF) do not correspond to those of the hardcopy.
Otherwise, the two are the same.
 
 

CHAPTER 25

Chapter 25: Polygonal Fault Systems: A New Type of Fault Structure Revealed by 3-D Seismic Previous HitDataNext Hit from the North Sea Basin

Joseph A. Cartwright*

 

Cartwright, J. A., Polygonal fault systems: a new type of fault structure revealed by 3-D seismic Previous HitdataNext Hit from the North Sea Basin, in P. Weimer and T. L. Davis, eds., AAPG Studies in Geology No. 42 and SEG Geophysical Developments Series No. 5, AAPG/SEG, Tulsa, p. 225-230.
ABSTRACT

This paper describes a new class of fault structure: the polygonal fault system. This complex fault system is composed of almost randomly oriented minor extensional faults organized in a polygonal network. The component faults are typically 500-1000 m long and have throws ranging from 10 to 100 m. They are closely Previous HitspacedNext Hit (200-400 m), and fault Previous HitmappingNext Hit is possible only with 3-D seismic Previous HitdataTop.

The polygonal fault system deforms Lower Tertiary shale sequences over a large part of the North Sea Basin and is restricted in extent to low-permeability facies in slope and basin plain regions. The faulted intervals are bounded above and below by completely undeformed sequences. These key observations are taken to suggest a genetic model in which the fault system formed through a compaction-related mechanism.

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