An integrated shear-wave velocity model for the Groningen gas field, The Netherlands
| Autor: | Ewoud van Dedem, M. Korff, J.L. Gunnink, Jan van Elk, Julian J. Bommer, Dirk Doornhof, Remco Romijn, Adrian Rodriguez-Marek, Ger de Lange, Pauline P. Kruiver, Jan Stafleu |
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| Přispěvatelé: | Civil and Environmental Engineering |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Surface-wave inversion
0211 other engineering and technologies Borehole Geological Survey Netherlands 02 engineering and technology 010502 geochemistry & geophysics Microzonation 01 natural sciences 0905 Civil Engineering 2015 Geo Shear-wave velocity 2015 Energy 0105 earth and related environmental sciences Civil and Structural Engineering Randomisation 021110 strategic defence & security studies Seismic microzonation Hydrogeology Strategic Defence & Security Studies Geology Building and Construction Geotechnical Engineering and Engineering Geology Natural gas field Site response analysis Geophysics GM - Geomodelling 0403 Geology Surface wave Sonic logging Surface wave inversion ELSS - Earth Life and Social Sciences Structural geology Seismology Geosciences |
| Zdroj: | Bulletin of Earthquake Engineering, 15(9) Bulletin Earthqauke Engineering, 15, 3555-3580 |
| ISSN: | 1570-761X |
| Popis: | A regional shear-wave velocity (VS) model has been developed for the Groningen gas field in the Netherlands as the basis for seismic microzonation of an area of more than 1000 km2. The VS model, extending to a depth of almost 1 km, is an essential input to the modelling of hazard and risk due to induced earthquakes in the region. The detailed VS profiles are constructed from a novel combination of three data sets covering different, partially overlapping depth ranges. The uppermost 50 m of the VS profiles are obtained from a high-resolution geological model with representative VS values assigned to the sediments. Field measurements of VS were used to derive representative VS values for the different types of sediments. The profiles from 50 to 120 m are obtained from inversion of surface waves recorded (as noise) during deep seismic reflection profiling of the gas reservoir. The deepest part of the profiles is obtained from sonic logging and VP–VS relationships based on measurements in deep boreholes. Criteria were established for the splicing of the three portions to generate continuous models over the entire depth range for use in site response calculations, for which an elastic half-space is assumed to exist below a clear stratigraphic boundary and impedance contrast encountered at about 800 m depth. In order to facilitate fully probabilistic site response analyses, a scheme for the randomisation of the VS profiles is implemented. |
| Databáze: | OpenAIRE |
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