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- Volume 27, Issue 12, 2009
First Break - Volume 27, Issue 12, 2009
Volume 27, Issue 12, 2009
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News Feature: How improved teamwork and adoption of a geoengineering culture can improve oil recovery
More LessPatrick W. M. Corbett, well known advocate of a geoengineering approach to integrating geoscience and engineering disciplines to achieve improved oil recovery, considers some psychological issues in effective teamwork.
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Coil survey design and a comparison with alternative azimuth-rich geometries
By D. HillDavid Hill, WesternGeco, explains coil survey design, touches on some data processing considerations, and then compares various coil designs with NAZ and WAZ.
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Choosing the optimal system for life of field seismic
Mark Amelang of the Octio Group argues that the ideal system for 25 years of reservoir seismic monitoring should be based on MEMs accelerometer technology rather than a fibre optic solution.
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Why marine seismic acquisition optimization is worth every penny
By S. FlemingMarine seismic projects are complex to plan and expensive to acquire, so any pre-planning strategies adjustments during acquisition that can improve efficiency and reduce costs are worth considering. Stephen Fleming* of Australian company Engenius Software explains.
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Geoelectric modelling with separation between electromagnetic and induced polarization field components
Authors P. Veeken, P. Legeydo, I. Pesterev, Y. Davidenko, E. Kudryavceva and S. IvanovGeoelectric methods map resistivity and induced polarization in the subsurface. The differentially normalized electromagnetic method (DNME) detects geochemical alteration zones that give rise to anomalous responses. Such zones are commonly situated in sedimentary rocks some distance above hydrocarbon accumulations. Epigenetic mineral growth is stimulated by a change in pH of the pore fluid due to leakage of hydrocarbons from a non-perfect top seal. DNME uses particular geoelectric parameters derived from potential difference relaxation curves observed in the field. An electric depth model is established by 1D inversion with the Cole-Cole simulation procedure. Synthetic modelling shows that separation of the electromagnetic and induced polarization components of the total measured electric field is possible. Simulated field responses at the recording station are compared with those from two known 3D depth models. The discrepancy or misfit is less than 0.2%. The effectiveness of the workflow is demonstrated on the Severo-Guljajevskaya case study in the Barents Sea. The DNME evaluation technique reduces risks attached to drilling new hydrocarbon prospects and provides a better ranking at reasonable cost.
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Optimizing survey design for diffracted multiple attenuation with 3D SRME
Authors A. Baumstein, R. Neelamani, D.L. Hinkley, K.D. Andersen and T.G. FarringtonWe describe a methodology that can be used in designing a survey suitable for subsequent application of advanced multiple attenuation methods for the purpose of tackling complex diffracted multiples. The problem of diffracted multiple attenuation is tackled through an application of surface-related multiple elimination in three dimensions (3D SRME). The impact of changes in acquisition geometry is assessed by performing multiple attenuation on synthetic data. We demonstrate that 3D SRME can successfully attenuate surface-related diffracted multiples, provided the necessary full wavefield is either acquired or reconstructed. We focus our study on the impact of acquisition geometry on the quality of multiple suppression and show that acquiring higher-density data can lead to significant improvements in diffracted multiple attenuation. Finally, we demonstrate that 3D SRME was able to achieve a high degree of diffracted multiple attenuation in a field survey acquired with the geometry studied in synthetic data experiments.
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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)