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Book Chapter

Modelling fault geometry and displacement for very large networks

By
Dustin L. Lister
Dustin L. Lister
Department of Earth Sciences and Engineering, Imperial College, RSM Building, Prince Consort Road, South Kensington, London, SW7 2BP (e-mail: dlister@gatwick.westerngeco.slb.com)Present address: Schlumberger House, Buckingham Gate, Gatwick Airport, West Sussex, RH6 0NZ, UK
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Published:
January 01, 2004

Abstract

Traditional methods for building fault models are time-consuming when applied to a complex fault network or where many faults exist since the workflows typically rely on manual intervention at several stages. Structural detail is often simplified to reduce cycle times and consequently, the workflow favours large-scale and simplistic fault systems. There is generally no integrated assessment of kinematic information that would be useful in guiding fault interpretation. A new methodology for constructing a complex fault network with small offset is presented. The method recognizes that interpretation of large numbers of interconnected low displacement faults, is most efficiently done using map based interpretations. A novel semi-automated skeletonization algorithm is used to extract fault traces from horizon maps providing a polyline data set for subsequent use in 3D surface creation. Displacement information is derived automatically during or after the skeletonization providing kinematic information for guiding further interpretation. The new method is validated against manual interpretations of fault geometry and displacement before application to a region of the Central North Sea exposing polygonal faults. The new technique allows for the first time, a rapid and accurate appraisal of complex near-seismic scale fault geometry and displacement from interpretations of 3D seismic data across a large survey area.

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Contents

Geological Society, London, Memoirs

3D Seismic Technology: Application to the Exploration of Sedimentary Basins

Richard J. Davies
Richard J. Davies
Cardiff University, UK
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Joseph A. Cartwright
Joseph A. Cartwright
Cardiff University, UK
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Simon A. Stewart
Simon A. Stewart
BP, Azerbaijan
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Mark Lappin
Mark Lappin
ExxonMobil Exploration Company, USA
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John R. Underhill
John R. Underhill
The University of Edinburgh, UK
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Geological Society of London
Volume
29
ISBN electronic:
9781862394049
Publication date:
January 01, 2004

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