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- Volume 32, Issue 4, 2014
First Break - Volume 32, Issue 4, 2014
Volume 32, Issue 4, 2014
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A novel warped-space concept for interactive 3D-geometry-inversion to improve seismic imaging
Authors M.R. Alvers, H.J. Götze, L. Barrio-Alvers, S. Schmidt, B. Lahmeyer and C. PlonkaM.R. Alvers, H.J. Götze, L. Barrio-Alvers, C. Plonka, S. Schmidt and B. Lahmeyer present a technique whereby triangulated facets and voxel-cubes are treated in parallel, allowing integrated models for seismic, magnetic and EM data. It is a commonly accepted truth in the oil industry that ‘the easy oil has been found’. Finding the remaining hydrocarbons requires better technologies. Examples are exploration projects below salt and basalt, which are difficult to image with seismic. The main exploration method is still seismic but it has become more important to integrate seismic with other methods in order to improve imaging. In areas of strong lateral velocity and density changes, gravity modelling can help to improve velocity models used for seismic imaging. Efforts of joint interpretation of e.g., seismic, gravity and EM methods lead to more and more realistic and therefore more complex models.
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Improving the integration of gravity gradiometry and seismic data and where gravity data has the greatest impact
Authors Neil Dyer and Claire HusbandNeil Dyer1 and Claire Husband, present a new technique that enables gravity and seismic data to work better together.
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Towed streamer EM comes of age
Authors F. Engelmark, Johan Mattsson, Allan McKay and Zhijun DuFolke Engelmark, Johan Mattsson, Allan McKay and Zhijun Du reflect on ten years of the first commercial towed EM system.
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The role of potential fields as an early dataset to improve exploration in frontier areas
Authors Phill Houghton, Peter Butall, Milos Cvetkovic and Stanislaw MazurPhill Houghton, Peter Nuttall, Milos Cvetkovic and Stanislaw Mazur discuss the role potential field data can play in improving and accelerating exploration in frontier areas, such as North East Greenland.
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Multi-disciplinary integration of seismic interpretation, AVO inversion and CSEM in the West Loppa exploration
Authors Mehdi Paydayesh, Margaret Leathard, Federico Ceci and Ajai Kumar SharmaMehdi Paydayesh, Margaret Leathard, Federico Ceci and Ajai Kumar Sharma describe the integration of multiple geophysical methods for reducing uncertainty in identifying hydrocarbon potential during the predrill appraisal of a prospect in the West Loppa area of the Barents Sea.
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Channel play in Foz do Amazonas – exploration and reserve estimate using regional 3D CSEM
Authors Håkon T. Pedersen and Mike HinerHåkon T. Pedersen and Mike Hiner present the results of a regional multi-client 3D CSEM survey in Brazil as a fluid indicator and estimator of net rock volume.
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The impact of a quick 4D seismic survey and processing over the Halfdan Field, Danish North Sea
Authors M.A. Calvert, H.H. Roende, I.H. Herbert, J. Za, P. Hickman and U. MickschThe quick turnaround of seismic processing of a 4D time lapse survey over the Halfdan oil field allowed for interpretation and integration of the new 4D results seven weeks after completion of the seismic acquisition. Analysis of the first fast track 4D dataset led to improved processing parameters and an additional demultiple application which yielded a significantly improved fast track dataset 11 weeks after the seismic acquisition was completed. The repeat 4D seismic survey was acquired in the summer of 2012 in order to provide a better understanding of the sweep efficiency from the line drive water flood, guide future well interventions and improve the reservoir model. The baseline 3D seismic data was acquired in 1992/1993, prior to field development, and the first monitor 3D seismic was acquired in 2005. The rock physics model shows that increased water saturation due to the water flooding along the injectors in the Tor oil-bearing reservoir dominates the 4D change in acoustic impedance yielding a hardening response. The rock physics model was used to convert the reservoir model pressure and saturation changes from the three time-steps to modelled acoustic impedance changes. Examples will be shown from the 4D time lapse and the reservoir model acoustic impedance changes.
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Gannet F field – Unexpected fluid flow between reservoirs identified from time-lapse seismic data
Time-lapse (4D) seismic data has been at the heart of the further development of the Gannet F field, from infill well planning, determination of fluid flow and identification of inter-reservoir connectivity. Repeated monitor surveys have allowed an insight into the spatial movement of fluids, even detecting fluid movement in reservoirs with no development well penetrations. Integration of 4D and high-definition 3D seismic inversion results with well data and geological conceptual models have been used to build and test a range of static and dynamic models to investigate connectivity concepts and reservoir distribution. From this improved understanding, the southern reservoir units in the field have been identified as having undeveloped crestal volumes.
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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)