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- Volume 26, Issue 12, 2008
First Break - Volume 26, Issue 12, 2008
Volume 26, Issue 12, 2008
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Improved imaging of the Snøhvit field through integration of 4C OBC and dual-azimuth streamer seismic data
Authors G. Rønholt, H.A. Aronsen, T. Hellmann and S. JohansenGrunde Rønholt, Hans A. Aronsen, Thomas Hellmann and Stian Johansen provide a case study from the Snøhvit field to prove the value of integrating acquisition data from OBC and dual-azimuth streamer seismic surveys for optimal reservoir characterization.
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Full azimuth imaging using Coil Shooting acquisition
By R. RossRobert Ross describes the development of WesternGeco's proprietary circular geometry seismic shooting technique as an option in enhanced azimuth imaging.
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Launch of SEG-D Revision 3.0
Authors R. Hagelund, S.A. Levin and J. LewisRune Hagelund, Stewart A. Levin and Jill Lewis explain the significant changes coming for the seismic data acquisition and processing community with the revision of the SEG-D-Field Tape Standard now in its final stages.
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Making the case for ocean bottom seismic data?
By C. WalkerWith illustrations from his company’s operations in recent years, Dr Chris Walker of Reservoir Exploration Technology (RXT) argues that the imaging benefits from ocean bottom seismic surveys outweigh the current industry preference for a towed streamer approach.
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Consulting the GODS of seismic permanent reservoir monitoring
By M. BettMartin Bett, Stingray Geophysical, explains how his company came up with the systematic criteria for the development of a life of field seismic reservoir monitoring system based on fibre optic technology.
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Advances in swell noise attenuation
Authors M. Schonewille, A. Vigner and A. RyderMichel Schonewille, Alan Vigner and Alan Ryder of Petroleum Geo-Services describe a method for attenuating swell noise prevalent in towed streamer marine seismic which improves on standard FX filtering.
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Synthetic mudstone compaction trends and their use in pore pressure prediction
Authors N.H. Mondol, M. Fawad, J. Jahren and K. BjørlykkeWe have compared compaction trends for synthetic mudstones to well logs in order to predict pore pressure in shallow mudstone sequences in the northern North Sea and Vøring Basin, offshore Norway. Well log data showing intervals of higher porosity and lower density than the experimental data may indicate significant overpressure development. The variability found within mudstone compaction trends indicates that mechanical compaction of mudstones varies over a wide range depending on clay mineral type (smectite, kaolinite, chlorite, illite, etc.), particle size, the total amount of clays, sand and silt particles (quartz, feldspar, mica, etc.), nature of pore fluids, and pore pressure. Smectite has low ompressibility, velocity, and permeability compared to other clay minerals. The key to successful application of compaction trends to pore pressure prediction, therefore, must be lithological and textural characterization of the individual mudstones. These parameters are predominantly controlled by provenance, facies, and depositional history. This study demonstrates that experimental compaction trends of well characterized synthetic mudstones can be a useful tool to predict pore pressure during shallow burial where mechanical compaction is the dominant process.
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4D reservoir geomechanics: a case study from the HP/HT reservoirs of the Elgin and Franklin fields
Authors S. De Gennaro, A. Onaisi, A. Grandi, L. Ben-Brahim and V. NeilloThe quest for better predictability of reservoir behaviour has led to the need to construct more realistic and complex models, where the geoscience and reservoir engineering disciplines interact more effectively. In this paper we present an integrated workflow that combines results from 4D seismic inversion, geomechanics modelling, and reservoir simulations in a shared earth model. It has been applied to the Elgin and Franklin high-pressure/high-temperature fields located in the UK Central Graben of the North Sea. These structurally complex fields are a challenge for a shared earth model approach. The 4D seismic datasets have been inverted into interval time-shifts using an in-house warping method. In parallel, a coupled faulted reservoir and geomechanical model has been used to determine both the stress redistribution within and around the reservoir including associated reactivated fault slips, and to derive synthetic 4D time-shifts with the help of a rock physics model. Good matches have been achieved between observed and synthetic 4D time-shifts. This integrated study proved to be a useful tool for understanding the reservoir and production behaviour of the Elgin and Franklin fields, with the ultimate goal being identification of new drilling targets and mitigation of casing integrity risks.
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Volumes & issues
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Volume 42 (2024)
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Volume 41 (2023)
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Volume 40 (2022)
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Volume 39 (2021)
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Volume 38 (2020)
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Volume 37 (2019)
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Volume 36 (2018)
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Volume 35 (2017)
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Volume 34 (2016)
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Volume 33 (2015)
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Volume 32 (2014)
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Volume 31 (2013)
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Volume 30 (2012)
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Volume 29 (2011)
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Volume 28 (2010)
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Volume 27 (2009)
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Volume 26 (2008)
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Volume 25 (2007)
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Volume 24 (2006)
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Volume 23 (2005)
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Volume 22 (2004)
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Volume 21 (2003)
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Volume 20 (2002)
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Volume 19 (2001)
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Volume 18 (2000)
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Volume 17 (1999)
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Volume 16 (1998)
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Volume 15 (1997)
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Volume 14 (1996)
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Volume 13 (1995)
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Volume 12 (1994)
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Volume 11 (1993)
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Volume 10 (1992)
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Volume 9 (1991)
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Volume 8 (1990)
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Volume 7 (1989)
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Volume 6 (1988)
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Volume 5 (1987)
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Volume 4 (1986)
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Volume 3 (1985)
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Volume 2 (1984)
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Volume 1 (1983)