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Line 139: − + − [[file:geological-cross-sections_fig3.png|thumb|300px|{{figure number|3}}An example of a fence diagram.]]+ − + − [[file:geological-cross-sections_fig4.png|thumb|300px|{{figure number|4}}An example of a block diagram.]]+
→Cross sections in three dimensions
==Cross sections in three dimensions==
==Cross sections in three dimensions==
<gallery mode=packed heights=200px widths=200px>
geological-cross-sections_fig3.png|{{figure number|3}}An example of a fence diagram.
geological-cross-sections_fig4.png|{{figure number|4}}An example of a block diagram.
</gallery>
When the full three-dimensional aspect of a field must be shown, a single cross section or even a suite of cross sections may not be sufficient. The display of numerous wells in a three-dimensional array can be accomplished by a ''fence diagram'', in which the datum horizon is represented by the plane of the map. Well plots are displayed vertically, with the datum at the well location on the map plane ([[:file:geological-cross-sections_fig3.png|Figure 3]]). The wells are the “fence posts,” and the lines connecting formation tops are the “rails” that give this diagram its name. Geological relationships can also be portrayed on a ''block diagram'', in which the sides and top of a schematic block cut into the earth at the location of interest are shown in a three-dimensional representation ([[:file:geological-cross-sections_fig4.png|Figure 4]]).
When the full three-dimensional aspect of a field must be shown, a single cross section or even a suite of cross sections may not be sufficient. The display of numerous wells in a three-dimensional array can be accomplished by a ''fence diagram'', in which the datum horizon is represented by the plane of the map. Well plots are displayed vertically, with the datum at the well location on the map plane ([[:file:geological-cross-sections_fig3.png|Figure 3]]). The wells are the “fence posts,” and the lines connecting formation tops are the “rails” that give this diagram its name. Geological relationships can also be portrayed on a ''block diagram'', in which the sides and top of a schematic block cut into the earth at the location of interest are shown in a three-dimensional representation ([[:file:geological-cross-sections_fig4.png|Figure 4]]).