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- Volume 32, Issue 12, 2014
First Break - Volume 32, Issue 12, 2014
Volume 32, Issue 12, 2014
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An overview of the Ionian zone source rocks and petroleum potential of NW Greece (Ioannina concession block)
Henry B. David, Constantinos Tzimeas, Paschalia Kiomourtzi, Panagiotis A. Konstantopoulos, George Panagopoulos and Christos Athanasakopoulos discuss the geology of NW Greece with a view to unlocking its hydrocarbon potential.
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Integrated sequence stratigraphy using trend logs and densely mapped seismic data
Authors Farrukh Qayyum and David SmithFarrukh Qayyum and David Smith explore an analytical method that combines the relative lateral continuity of seismic imaging with the greater vertical resolution of well log data to optimize both types of data.
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Reconstruction of tectonic heat flow in the Rub’al-Khali Basin relying on an updated crustal model
Authors Rader Abdul Fattah, Sjef Meekes and Jan Diederik van WeesRader Abdul Fattah, Sjef Meekes and Jan Diederik van Wees present a new crustal model based on the GOCE satellite gravity data to reconstruct heat-flow evolution in the Rub’ Al-Khali basin in the Arabian Plate.
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Ireland Atlantic Margin: a new era in a frontier basin
Authors Richard Wrigley, Anongporn Intawong and Karyna RodriguezRichard Wrigley, Anongporn Intawong and Karyna Rodriguez review the prospectivity of the Rockall basin offshore Ireland.
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Tutorial: migration imaging conditions
By Ian JonesMigration of seismic data is the process that attempts to build an image of the Earth’s interior from recorded field data, by repositioning these data into their ‘true’ geological position in the subsurface, using various numerical approximations of either a wave-theoretical or ray-theoretical description of the propagation of sound waves in the subsurface. This migration can be described as being performed in a number of stages, both for ray and wave-extrapolation based methods. The final stage of the migration process is that which forms the image, via what is known as an imaging condition. In this tutorial, I will outline the various methods involved in forming imaging conditions, primarily for the case of wave-extrapolation methods, and describe some of the techniques used to build gathers of pre-stack-migrated data for use in post-migration velocity analysis.
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Estimating ocean currents from the shapes of laterally steered streamer arrays
Authors Timothy Grant, Robert Laws and Emily ShuckburghWhen conducting marine seismic surveys, ocean currents noticeably perturb seismic streamers from their desired location. To accurately monitor a reservoir, the receivers in the streamers must be as close as possible to their previous positions. Therefore, it is desirable to know the currents in real time. Previous work has used the position and tension in a streamer to infer the currents. However, in many streamer systems, tension is not measured along the streamer. To overcome this problem, we propose that, by assuming that ocean currents are horizontally divergence-free, it should still be possible to reconstruct the currents from the positions of multiple streamers. Additionally, the previous work assumed that, when modelling a streamer, bending stiffness can be neglected. It is not clear that this assumption is correct when steering devices are attached; we therefore examine this assumption, using a novel finite difference scheme that incorporates bending stiffness, and conclude that it is safe to do so. Should such a method for inferring currents be implemented, the resulting information should not only be of value to the seismic industry, but also of use to oceanographers who wish to study submesoscale processes.
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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)