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- Volume 20, Issue 9, 2002
First Break - Volume 20, Issue 9, 2002
Volume 20, Issue 9, 2002
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Reservoir and production optimization means working together
By J. BarrigaThis article, adapted from Reservoir and production optimization, a Schlumberger Information Solutions White Paper by Jaime Barriga, drilling and production portfolio manager, takes a look at the long and short term practicalities of making decisions to get the most out of producing reservoirs.
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The ‘mega survey’ route to understanding reservoir potential
Authors H. Edwards and J. WitneyThe case for mega surveys for increased understanding of hydrocarbon potential. In this edited version of a newly released PGS technical article.
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How Paradigm built its reservoir of geoscience knowledge
By A. McBarnetFor nearly 15 years Eldad Weiss and the people around him have been focused upon building Paradigm Geophysical into a ‘knowledge company’ able to provide a comprehensive set of solutions for E&P companies ranging from seismic data processing and interpretation to reservoir characterisation and petroleum engineering. Andrew McBarnet reports on the company’s increasing momentum towards its objectives and the gap still to be filled.
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Value enhancement in the upstream cycle through advanced geoscience and engineering techniques
Authors N. Oates and P. CrookallNeil Oates, Phil Crookall, Adrian Pelham, John Gailey and Graeme Gordon of Scott Pickford (EAME), a division of CoreLab Reservoir Technologies, provide a breakdown of the options available for maximising the value of hydrocarbon resources Value enhancement that can be achieved throughout the life of a hydrocarbon play, from pure exploration, through the appraisal and development stages to production, demonstrates the importance of an integrated geoscience and engineering approach. This approach involves the application of different technologies and skill sets as the play matures, the objective being at each stage to reduce the technical risks of achieving and maintaining a commercial success. The application of these advanced techniques are discussed in this article, together with some recent case studies.
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Global survey lessons on use of geological analogues
Authors S. Qing Sun and J.C. WanS. Qing Sun and J. C. Wan of US-based company C&C Reservoirs report on an independent research project by Qittitut Consulting carried out on behalf of C&C Reservoirs. The aim of the study was first, to assess the real world use and methodology of geological analogues in general, and digital analogue systems in particular, and second, to determine the merits and effectiveness of the analogue approach in exploration prospecting and field development.
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Geo-seismic characteristics of thin reservoir intervals in West Siberia: interpretation problems and their solutions
The Cretaceous and Jurassic terrigenous section of the West Siberia basin is known from well data to consist of quasi-homogeneous thin layers with thickness ranging from 0.5 to 15 m. Lithologies vary from clays to sands, with many intermediate types of rock with different compaction and clay to sand ratios. Reflection coefficients are generally low (less than 0.1), and seismic multiples are not a severe problem. Only high velocity sparse thin (0.5–1.5 m) coal beds and dense carbonized sandstone add some slight complications to the seismic wave field. Tectonic activity in the region has been very low and most seismic horizons can be treated as quasi-horizontal. However, the porosity and permeability characteristics of the layers are very laterally variable. Even in a Cretaceous clinoform complex of Neocomian age and Jurassic faulted continental intervals, the lateral lithology shows more fickleness than the geometry of the layers. The situation is ideal for regional seismic stratigraphic interpretation, but not for the creation of models based on seismic data to improve field development or the identification of small structural/stratigraphic traps that at best are hardly visible on seismic sections. Many of the oil- and gas-saturated intervals of Cretaceous and Jurassic age are beyond seismic resolution, and most of the reflectors seen by interpreters are a result of the interference of numerous reflected waves. The main difficulty of seismic interpretation in the West Siberia region results from an inadequate regard for this thin layering of the geological strata. Exploration and production activity in the region has been increasingly targeted towards small (1–4 km2) structures with closures of 20–40 m or even less, and effective pay thicknesses of about 1.5–12 m. As operating oil companies are only partly replacing their oil production by putting new reserves on stream, increased priority will have to be given to innovative interpretation (N.A. Krylov 1998). In this situation it is very important to assess the resolution limits of existing geophysical methods and interpretation techniques. So what is the precise influence of some typical thin-layered sand reservoirs on seismic and sonic wave fields, what is the impact of various fluid saturations, and what could be done to improve the interpretation process in the biggest Russian oil province?
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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)