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- Volume 26, Issue 8, 2008
First Break - Volume 26, Issue 8, 2008
Volume 26, Issue 8, 2008
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UK oil and gas operations need nurturing to survive, says industry report
We publish here selected extracts from Oil & Gas UK’s Economic Report 2008, the latest guide to the UK’s offshore oil and gas industry performance and prospects from an industry perspective. Oil & Gas UK is the not-for-profit organisation, established in April 2007 on the foundations of the UK Offshore Operators Association (UKOOA) and incorporating the contractor companies who were members of the now disbanded Industry Leadership Team.
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Is it time to re-engineer geotechnical seismic refraction methods?
By D. PalmerIn 2005, Derecke Palmer* was part of the EAGE Distinguished Lecturer Programme. The major theme of his short course was the need to modernize the great majority of near-surface seismic operations which are carried out for geotechnical investigations. Here he offers his personal assessment of what needs to be done.
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Near surface geoscience needs to demonstrate its value
By J. ArthurApplied geophysics for the study of engineering sites and, more recently, environmental issues has tended to be an under-appreciated capability of engineering laboratories and academic institutions. So states John Arthur,* new vice-chairman of the EAGE’s Near Surface Geoscience Division and longtime practitioner in this field. To prove the point he describes projects and research by five different companies in the UK which characterize the possibilities with the use of modern methods. The choice of companies from around 20 in total is purely illustrative and has no commercial or other significance.
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Monitoring aquifer-system response to groundwater pumping and artificial recharge
Authors J.W. Bell, F. Amelung, A. Ferretti, M. Bianchi and F. NovaliJohn W. Bell, Falk Amelung, Alessandro Ferretti, Marco Bianchi and Fabrizio Novali present a new satellite methodology for detecting and measuring long-term and seasonal aquifer-system response to pumping and recharge which potentially could be used for oil and/or gas reservoir monitoring.
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Using portable geophysical logging systems for uranium exploration
By J.J. LoCocoJames J. LoCoco,* Mount Sopris Instrument Company, explains some of the technical factors involved in estimating uranium resources using geophysical logging methods.
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The new synergy between seismic reflection imaging and oceanography
Authors S.M. Jones, R.J.J. Hardy, R.W. Hobbs and D. HardyThe effects of variation in oceanic temperature and salinity on reflection seismic images became widely known to the hydrocarbon industry in 1993 following acquisition of large 3D seismic surveys in the Faroe-Shetland Channel. A decade later, it was shown convincingly that conventional reflection seismic data provide good quality images of oceanic thermohaline structure. Over the past five years, it has been established that seismic reflection surveying provides a tool to efficiently survey unprecedently large ocean volumes at high spatial resolution. We illustrate the processing stages required to produce oceanic images using seismic data from Rockall Trough, west of Ireland. When the cause of the seismic reflectivity is better understood, seismic images might eventually be used to measure spatial variation in oceanic mixing, which should significantly enhance our understanding of the climate system. The industry has the chance to help in mapping the ocean by facilitating access to legacy seismic data and by making the water layer of new seismic data available for academic research. Ability to predict spatial and temporal variation in oceanic temperature and currents, at little extra cost in comparison with seismic data acquisition, should also help the industry in field development and management.
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CMP inversion and post-inversion modelling for marine CSEM data
Authors R. Mittet, K. Brauti, H. Maulana and T.A. WicklundInversion of marine controlled-source electromagnetic (CSEM) data that have been sorted into common mid-point gathers can give an estimate of the resistivity section below a towline. The method is fast and requires relatively small computer resources even for a Levenberg-Marquardt optimization scheme. However, it is not a standalone method. Proper 3D modelling with quantitative error analysis is used in a post-inversion step to refine the resistivity model. We demonstrate how inversion of common mid-point gathers can be used in combination with post-inversion modelling to improve the interpretation of a marine CSEM profile from South-East Asia. Two resistors are identified on the section, and the deeper one is a confirmed gas accumulation in Upper Miocene turbidites.
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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)