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Seismic data - creating an integrated structure map (view source)
Revision as of 19:59, 10 March 2014
, 19:59, 10 March 2014no edit summary
==Step 1: Map structure from well data==
==Step 1: Map structure from well data==
Post well depths to key horizons and contour structure maps for key horizons using well control only. These well maps of structure should guide you when making structure maps that integrate both well and seismic data. Comparing this map with the final time structure map gives a good feel for the additional information supplied by the 3-D seismic section.
Post well depths to key horizons and contour structure maps for key horizons using well control only. These well maps of structure should guide you when making structure maps that integrate both well and seismic data. Comparing this map with the final time structure map gives a good feel for the additional information supplied by the 3-D seismic section.
==Step 2: Pick seismic horizons==
==Step 2: Pick seismic horizons==
[[file:interpreting-seismic-data_fig12-12.png|left|thumb|{{figure number|1}}(a) Representative line from the Glenn Pool data volume with sonic overlay and tracked events; (b) Horizon amplitude and time structure maps for the Wilcox. Copyright: Liner, 1999; courtesy PennWell.]]
For 2-D data, only the traveltime to each event of interest is recorded with its coordinate along the line ''t''(''x''). For 3-D data, both traveltime and amplitude at each (''x, y'') are available from the seismic data cube, ''t''(''x, y'') and ''a''(''x, y''). The traveltimes form a time structure map, and the amplitudes are a horizon slice. [[:file:interpreting-seismic-data_fig12-12.png|Figure 1A]] shows a representative line from the Glenn Pool data volume with sonic overlay and tracked events. Horizon amplitude and time structure maps for the Wilcox are shown in [[:file:interpreting-seismic-data_fig12-12.png|Figures 1B, C]].
For 2-D data, only the traveltime to each event of interest is recorded with its coordinate along the line ''t''(''x''). For 3-D data, both traveltime and amplitude at each (''x, y'') are available from the seismic data cube, ''t''(''x, y'') and ''a''(''x, y''). The traveltimes form a time structure map, and the amplitudes are a horizon slice. [[:file:interpreting-seismic-data_fig12-12.png|Figure 1A]] shows a representative line from the Glenn Pool data volume with sonic overlay and tracked events. Horizon amplitude and time structure maps for the Wilcox are shown in [[:file:interpreting-seismic-data_fig12-12.png|Figures 1B, C]].