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- Volume 16, Issue 8, 1998
First Break - Volume 16, Issue 8, 1998
Volume 16, Issue 8, 1998
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How Qureshi came to meet the challenge of leadership at Geco-Prakla
By A. McBarnetPakistan-born Umar Qureshi is president of Geco-Prakla and close to the top of the Schlumberger management structure. He explains to Andrew McBarnet why the corporate emphasis on people and technology is benefiting Geco-Prakla and how he personally came to the leadership role.
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Oil price low but energy outlook is good, says BP
The annual BP review of world energy trends offers perspective to current gloom in the E&P industry which will appeal to energy consumers at least, for example, oil is not going to run out for some time to come despite the view of some geoscientists!
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Subtle lithoacoustic inversion of seismic data
By D.N. KrilovSubsurface description can be greatly enhanced by creating detailed models of the spatial variation of lithology and porosity, with layer thicknesses less than 1/4 of the seismic wavelength, integrating seismic, geological and log data. This type of interpretation is possible only on the basis of a subtle acoustic model refined to match a set of seismic traces. Nevertheless, it is very easy to get a good match between reflection seismic and synthetic traces derived from quite different earth models. Furthermore, a slight change in the layer parameters of the initial model or in the application of the inversion technique might produce significant changes in the derived model. Accurate characterization of the subsurface media is highly dependent on a priori knowledge of the lithological and acoustic features of the area, on the quality of the seismic data (frequency range, noise level, etc.) and on the sophistication of the inversion methodology (skilful use of geological information for initial model creation, characteristics of the inversion techniques applied, and choice of inversion parameters). Up to now there have been many positive and many negative results obtained in attempting to incorporate inversion techniques into geological interpretation. It has become necessary to assess in advance the likelihood of a successful modelling result and to recognize situations where the application of inversion is useless or even of negative value, despite a fine match to trace data.
Volumes & issues
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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)
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