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Book chapterPiggott MD, Pain CC, Gorman GJ, 2008,
Unstructured adaptive meshes for ocean modeling
, Ocean modeling in an eddying regime, Editors: Hecht, Hasumi, Hecht, Hasumi, Publisher: Amer Geophysical Union, Pages: 383-408, ISBN: 9780875904429 -
Journal articlevan Reeuwijk M, Jonker HJJ, Hanjalic K, 2008, , PHYS REV E, Vol: 77
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Journal articleCrowley H, Bommer JJ, Stafford PJ, 2008, , Journal of Earthquake Engineering, Vol: 12, Pages: 71-80, ISSN: 1363-2469
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Journal articleStafford PJ, 2008, , Bulletin of the Seismological Society of America, Vol: 98, Pages: 1588-1594
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Journal articleCrowley H, Stafford PJ, Bommer JJ, 2008, , Journal of Earthquake Engineering, Vol: 12, Pages: 1078-1104
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Journal articleVerdoold J, van Reeuwijk M, Tummers MJ, et al., 2008, , PHYS REV E, Vol: 77
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Journal articleKontoe S, Zdravkovic L, Potts DM, 2008, , International Journal for Numerical and Analytical Methods in Geomechanics, Vol: 32, Pages: 659-680
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Journal articlesaunders J, jackson M, pain C, 2008, , Geophysics, Vol: 73, Pages: E165-E180
Downhole measurements of electrokinetic potential are a promising new technology for hydrocarbon reservoir monitoring. Using a 3Dfinite-element model combining both multiphase flow and electrokinetic components, we investigated the behavior of electrokinetic (streaming) potential during oil production in a range of reservoir environments. We found that streaming-potential signals originate at fluid fronts and at geologic boundaries where fluid saturation changes. As water encroaches on an oil production well, the streaming-potential signal associated with the water front encompasses the well even when the front is up to 100 m away, so the potential measured at the well starts to change significantly relative to a distant reference electrode. Variations in the geometry of the encroaching water front can be characterized using an array of electrodes positioned along the well, but a good understanding of the local reservoir geology is required to identify signals caused by the front. The streaming potential measured at a well is maximized in low-permeability reservoirs produced at a high rate and in thick reservoirs with low shale content. However, considerable uncertainties remain, particularly relating to the nature of electrokinetic coupling at high salinity and during multiphase flow. Our results suggest that the streaming potential at low salinity (10^-3–10^-4 mol/L) is large (100–1000 mV) but might become too small to resolve (<0.1) mV at high salinity (0.5–2 mol/L), depending on how the available data for the electrokinetic coupling at low salinity are extrapolated into the high-salinity domain. More work remains to determine the behavior of electrokinetic coupling and therefore the utility of this technique at high salinity.
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Conference papervan Reeuwijk M, Mathias SA, Simmons CT, et al., 2008, , Virtual Conference on Climate Change and CO2 Storage, Publisher: Nature Precedings
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Journal articlevan Reeuwijk M, Jonker HJJ, Hanjalic K, 2008, , PHYS REV E, Vol: 77
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Journal articleSargeant SL, Stafford PJ, Lawley R, et al., 2008, , Seismological Research Letters, Vol: 79, Pages: 672-687
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Conference paperAddiego-Guevara EA, Jackson MD, Giddens MA, 2008,
Insurance value of intelligent well technology against reservoir uncertainty
, SPE/DOE Improved Oil Recovery Symposium -
Journal articleStafford PJ, Strasser FO, Bommer JJ, 2008, , Bulletin of Earthquake Engineering, Vol: 6, Pages: 149-177, ISSN: 1570-761X
The first phase of the Next Generation Attenuation (NGA) project has now finished, resulting in the publication of five new sets of empirical ground-motion models for PGA, PGV and response spectral ordinates. These models mark a significant advancement in the state-of-the-art in empirical ground-motion modelling and include many effects that are not accounted for in existing European equations. Under the assumption that the Euro-Mediterranean database from which the European relationships are derived is unlikely to drastically change in the near future, a prudent question to ask is: can the NGA models be applied in Europe? In order to answer this question, the NGA model of Boore and Atkinson (PEER Report 2007/01, Pacific Earthquake Engineering Research Center, Berkeley, CA, 234 pp., 2007), which is shown to be representative of the NGA models as a suite, is compared with the dataset used for the development of the most recent European empirical ground-motion models for response spectral ordinates and peak ground velocity. The comparisons are made using analyses of model residuals and the likelihood approach of Scherbaum et al. (Bull Seism Soc Am 94(6):2164–2185, 2004). The analyses indicate that for most engineering applications, and particularly for displacement-based approaches to seismic design, the NGA models may confidently be applied within Europe. Furthermore, it is recommended that they be used in conjunction with existing European models to provide constraint on finite-fault effects and non-linear site response within logic-tree frameworks. The findings also point to the potential benefits of merging the NGA and European datasets.
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Journal articleRushmer T, Jackson MD, 2008,
Impact of melt segregation on tonalite–trondhjemite–granodiorite (TTG) petrogenesis
, Trans. Royal Society of Edinburgh: Earth Science, Vol: 79, Pages: 325-336 -
Conference paperZdravkovic L, Kontoe S, 2008,
Some issues in modelling boundary conditions in dynamic geotechnical analysis
, 12th International Conference of International Association for Computer Methods and Advances in Geomechanics (IACMAG), Pages: 2918-2925 -
Conference paperMálaga-Chuquitaype C, Bommer JJ, Pinho R, et al., 2008,
Selection and scaling of ground-motion records for nonlinear response-history analyses based on equivalent SDOF systems
, 14th World Conference on Earthquake Engineering -
Conference paperStrasser FO, Stafford PJ, Bommer JJ, et al., 2008,
State-of-the-art of European earthquake loss estimation software
, 14th World Conference on Earthquake Engineering -
Journal articleBurberry CM, Cosgrove JW, Liu JG, 2008, , JOURNAL OF MAPS, Vol: 4, Pages: 417-430, ISSN: 1744-5647
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Journal articleHancock J, Bommer JJ, Stafford PJ, 2008, , Earthquake Engineering and Structural Dynamics, Vol: 37, Pages: 1585-1607, ISSN: 0098-8847
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Conference paperKontoe S, Zdravkovic L, Potts DM, 2008,
The importance of revised modulus decay curves on surface foundation settlement predictions in London Clay
, BGA International Conference on Foundations, Pages: 1549-1558
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