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- Volume 9, Issue 11, 1991
First Break - Volume 9, Issue 11, 1991
Volume 9, Issue 11, 1991
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Broadside shooting in the Alpine overthrust - a case study
By B. SachsIn the deeper parts of the Vienna Basin, the autochthonous Mesozoic formations, containing source and reservoir rocks, have been exploited for 20 years. Fifteen kilometres northwest of Vienna, in the Alpine overthrust, these target horizons were found beneath the flysch nappes at a depth of about 3 km in the Höftein Field (Schimunek and StröbI1985).
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The crosshole seismic reflection method in opencast coal exploration
Authors M.J. Findlay, N.R. Goulty and J.E. KraghIn opencast coal exploration in the UK, a dense grid of boreholes is drilled to provide the necessary information on the quantity and quality of coal reserves and on the geological structure. Typically, borehole spacing is 40- 60 m, but it may be reduced around faults or where there are old room-and-pillar mineworkings. Even with this density of boreholes, it is not possible to detect faults with throws less than 2-3 m, and these can pose a hazard to stability during excavation which may be particularly critical at site boundaries. Also, estimates of the quantity of coal reserves could be improved if old mineworkings were located more accurately.
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Petrophysical variation in the Senonian chalk of the Paris Basin and their influence on static corrections
More LessUncertainties in static corrections for seismic reflection data in the Paris Basin are on the same scale as the target closures. The larger part of the static corrections is due to variations in the Tertiary strata, but a significant contribution also arises from velocity inconsistencies in the underlying Upper Cretaceous chalk. The problem of evaluating accurate static corrections requires a multidisciplinary approach involving three sources of information: data on outeropping formations in the northwestern quarter of the Paris Basin; data from wells (lithological descriptions and wireline logs), which are mainly located in the central part of the basin; and seismic sections.
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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)