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- Volume 26, Issue 2, 2008
First Break - Volume 26, Issue 2, 2008
Volume 26, Issue 2, 2008
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Land seismic: the move towards the mega-channel
By B. HeathAs a physicist who stumbled by mistake into land seismic three decades ago, Bob Heath of AscendGeo observes the variable rate of progress in geophysical instrumentation, common to many fields of technical development.
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Operational implementation of full-azimuth, high-density land acquisition survey in Algeria
Authors M. Girard, D. Mougenot, C. Paulet, A. Rhamani, J. Griso and Y. BoukhalfaIn this case study of a complex 3D land seismic project, Marc Girard* (Total), Denis Mougenot (Sercel), Christophe Paulet (Total), Athman Rhamani (Sonatrach), José-Juan Griso (Cepsa), and Youcef Boukhalfa (Enageo) show how today’s high channel counts enable previously unachievable dense spatial sampling and wide aizimuth acquisition.
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Recent developments in low frequency spectral analysis of passive seismic data
By D. WalkerLow frequency passive seismic spectral analysis has developed rapidly since the first commercial pilot was described in First Break in 2005. David Walker1 of Spectraseis reviews recent research discoveries and explains how the growing volume of survey data is leading to innovative new data processing and analysis techniques.
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Increasing bandwidth with single sensor seismic data – the Lehib oilfield case study
Authors A. Refae, S. Khalil, B. Vincent and M. BallAbdulBaset Refae,1 Sayed Khalil,2* Bob Vincent,2 and Michael Ball2 provide a Libyan land seismic case study to show the merits of using a single sensor data acquisition and processing technique.
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The future of vibroseis for high-density wide-azimuth land acquisition
Authors J. Meunier, T. Bianchi, J. Postel and R. TaylorJulien Meunier*, Thomas Bianchi, Jean-Jacques Postel, and Roger Taylor of CGGVeritas explain the advantages of a single vibrator solution for wide-azimuth land data acquisition. High-density acquisition with wide- or multi-azimuth coverage is becoming more established throughout the E&P industry in both land and marine environments.Seismic data from these acquisition geometries are providing a step change in image quality for a wide range of geological settings and environments around the world. This improvement comes from some of the key advantages of wide-azimuth geometry: improved illumination, higher fold, superior noise and multiple attenuation and the possibility for higher resolution with smaller bin sizes. There are also specific data processing advantages such as scattered noise attenuation and better azimuthal sampling for fracture studies.
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The special conditions of water management in the Arab Gulf States: present and future challanges
Authors F.M. Howari and R. McDonnellFares M. Howari and Rachael McDonnell describe the background to concern over water availability in the Arab Gulf States and the management and technology solutions being considered to secure future supply.
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Seismic imaging and velocity model building using common reflection surface stack
Authors A.M. Al-Marzoug, F.Y. Ahmed and K.K. SlizAhmed M. Al-Marzoug, Ferhan Y. Ahmed, and, Krzysztof K. Sliz note that estimation in velocity model building is the most difficult, time-consuming, and controversial point in a flow processing sequence. One solution discussed here and applied to some Middle East data is use of the common reflection surface (CRS) process technique.
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Petroleum industry steps up biofuels investment
Authors P.W.M. Corbett, P. Mitchell and P. HughesFollowing a previous article last year, Profs Patrick Corbett, Paul Mitchell, and Paul Hughes provide an update on how the petroleum industry is playing a significant role in the biofuels sector, itself a topic of some scientific controversy in terms of its environmental role.
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Phase distortion and time shifts due to seismic attenuation and application to well ties
By Y. SinghIntroduction Data integration is a key step for accurate seismic interpretation and reservoir characterization. However, different scales of measurement should be taken into account when preparing data for integration. For example, sonic logs are measured at frequencies around 12 kHz with a very fine depth sampling interval (less than 0.3 m), while surface seismic data with a signal bandwidth of 6–100 Hz have a sampling interval of 2 or 4 ms. VSP data have slightly higher signal bandwidth than surface seismic data, but are sampled at a much coarser interval than sonic logs.
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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)