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Use of 3D visualization techniques to unravel complex fault patterns for production planning: Njord field, Halten Terrace, Norway

By
Chris Dart
Chris Dart
Norsk Hydro, Sandsliveien 90, 5020 Bergen, NorwayPresent address: Ruhrgas Norge AS, Kongsgårdbakken 1, 4003 Stavanger, Norway
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Ian Cloke
Ian Cloke
ExxonMobil International Limited, St. Catherines House, 2 Kingsway, London, UKPresent address: ExxonMobil Exploration Company, 222 Benmar, Houston, TX 77067, USA
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Åge Herdlevær
Åge Herdlevær
Norsk Hydro, Sandsliveien 90, 5020 Bergen, NorwayPresent address: Statoil, Postbooks 7200, 5020 Bergen, Norway
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Dominique Gillard
Dominique Gillard
ExxonMobil Upstream Research Company, 3120 Buffalo Speedway, Houston, TX 77098, USA
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Jan C. Rivenæs
Jan C. Rivenæs
Norsk Hydro, Sandsliveien 90, 5020 Bergen, Norway
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Cecilie Otterlei
Cecilie Otterlei
Norsk Hydro, Sandsliveien 90, 5020 Bergen, Norway
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Eivind Johnsen
Eivind Johnsen
Norsk Hydro, Sandsliveien 90, 5020 Bergen, Norway
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Anders Ekern
Anders Ekern
Norsk Hydro, Sandsliveien 90, 5020 Bergen, NorwayPresent address: Schlumberger Information Technology Services Norge AS, Aslakveien 14A, 0753 Oslo, Norway
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Published:
January 01, 2004

Abstract

In this paper we demonstrate the benefits of 3D seismic visualization techniques for fault interpretation where the structural geology is complex and the seismic data quality is often poor. Production from the Njord field is strongly influenced by a complex pattern of segmented and linked extensional faults. The current interpretation of the well test data and production history is that the faults form barriers to fluid flow, reducing oil production, and limiting effective gas injection and pressure support. Drilling results demonstrate that geometrical uncertainties remain in the seismic interpretation. An additional problem is that currently available commercial reservoir modelling technology cannot easily handle a very complex fault pattern, making simulation grid construction difficult. Accurate well placement and production forecasting requires that fault geometries and properties are suitably represented in the reservoir simulation model. 3D visualization of depth-scaled volumes and depth-converted interpretations helped to decide how to best simplify the fault geometry for simulation, and compare automatically generated geological model components against seismic interpretations and data. The reservoir simulation model runs resulted in the identification of a number of well targets. 3D visualization techniques were then used to predict faults and structures that the proposed well trajectories may intersect.

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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

GeoRef

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