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- Volume 7, Issue 1, 1989
First Break - Volume 7, Issue 1, 1989
Volume 7, Issue 1, 1989
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Heat flow techniques in geothermal exploration
By L. RybachGeothermal exploration aims to evaluate the temperature field and the mode of heat transfer in the subsurface of the earth. From this information the geothermal potential of the area under study can be assessed. Since there is a close interrelation between the generation, storage and transfer of heat on the one hand and the temperature field on the other, heat flow is a key parameter for understanding the thermal conditions and processes at depth.
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Source directivity and its effects on resolution and signature deconvolution
More LessWhen a source pattern is directional, particularly in the 'in-line' direction, serious losses of high-frequency data can occur in the recorded signal at large offsets. Furthermore, since source directivity increases with frequency, signature deconvolution becomes less and less effective as one moves up the frequency band. In this artiele a controlled marine field experiment is described where the same line was shot with two source arrays, the only variable being the in-line dimension of the source pattern. Though the source was waterguns, the author believes that either sleeve airguns or marine vibrators would also have the required bandwidth to demonstrate the effect illustrated. Raw field records from the two source arrays, which have overall lengths of 30 and 10 m, are compared after filtering with a narrow bandpass filter. Thereafter constant offset sections with signature deconvolution and predictive deconvolution applied are compared for the same offsets.
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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)