Changes

One way to improve the imaging of the paleodepositional system is to create horizon slices through the 3-D volume. The interpreted reflection (horizon) is an approximation of a paleodepositional surface. Within the time interval where reflections are approximately conformable to the interpreted horizon in three dimensions, the shape of the horizon surface is a reasonable description of the shape of the paleodepositional surfaces.

One way to improve the imaging of the paleodepositional system is to create horizon slices through the 3-D volume. The interpreted reflection (horizon) is an approximation of a paleodepositional surface. Within the time interval where reflections are approximately conformable to the interpreted horizon in three dimensions, the shape of the horizon surface is a reasonable description of the shape of the paleodepositional surfaces.

[[file:interpreting-3-d-seismic-data_fig13-9.png|thumb|{{figure number|1}}. Copyright: Dorn, 1998; courtesy SEG.]]

interpreting-3-d-seismic-data_fig13-9.png|{{figure number|1}}. Copyright: Dorn, 1998; courtesy SEG.

[[:file:interpreting-3-d-seismic-data_fig13-9.png|Figures 1]], [[:file:interpreting-3-d-seismic-data_fig13-10.png|2]], and [[:file:interpreting-3-d-seismic-data_fig13-11.png|3]] illustrate the value of the horizontal slice view of the data. [[:file:interpreting-3-d-seismic-data_fig13-9.png|Figure 1]] is a portion of a vertical seismic section from a 3-D seismic survey in the North Sea. The interpreted horizon, at approximately 2 seconds, is the Top Paleocene. Approximately 120 ms below this, at about the level indicated by the arrows, the section crosses a 1-km-wide Paleocene deepwater turbidite channel.

[[:file:interpreting-3-d-seismic-data_fig13-9.png|Figures 1]], [[:file:interpreting-3-d-seismic-data_fig13-10.png|2]], and [[:file:interpreting-3-d-seismic-data_fig13-11.png|3]] illustrate the value of the horizontal slice view of the data. [[:file:interpreting-3-d-seismic-data_fig13-9.png|Figure 1]] is a portion of a vertical seismic section from a 3-D seismic survey in the North Sea. The interpreted horizon, at approximately 2 seconds, is the Top Paleocene. Approximately 120 ms below this, at about the level indicated by the arrows, the section crosses a 1-km-wide Paleocene deepwater turbidite channel.

==Example time slice==

==Example time slice==

[[:file:interpreting-3-d-seismic-data_fig13-10.png|Figure 2]] is a time slice that intersects a portion of the channel. On both the vertical section ([[:file:interpreting-3-d-seismic-data_fig13-9.png|Figure 1]]) and the time slice, the channel is difficult to interpret, even though the feature is quite large. Most of the amplitude patterns on the time slice are associated with structure, not stratigraphy.

[[:file:interpreting-3-d-seismic-data_fig13-10.png|Figure 2]] is a time slice that intersects a portion of the channel. On both the vertical section ([[:file:interpreting-3-d-seismic-data_fig13-9.png|Figure 1]]) and the time slice, the channel is difficult to interpret, even though the feature is quite large. Most of the amplitude patterns on the time slice are associated with structure, not stratigraphy.

==Example horizon slice==

==Example horizon slice==