Changes

==Structural domains==

==Structural domains==

Structural domains within the Wyoming thrust belt were defined by the regional mapping of the U.S. Geological Survey<ref name=ch20r232>Rubey, W., W., 1973, Geologic map of the Afton quadrangle and part of the big Piney quadrangle, Lincoln and Sublette counties, Wyoming: U., S. Geological Survey map I–686.</ref> and by interpreting satellite images such as the one shown in [[:file:exploring-for-structural-traps_fig20-6.jpg|Figure 2]]. Individual major thrust sheets were defined across the belt as well as their change in character along strike, thus defining domains on a large scale. Note that the small white rectangle in the center of the satellite image is the approximate area seen in the oblique aerial photograph in [[Figure 20-12]].

Structural domains within the Wyoming thrust belt were defined by the regional mapping of the U.S. Geological Survey<ref name=ch20r232>Rubey, W., W., 1973, Geologic map of the Afton quadrangle and part of the big Piney quadrangle, Lincoln and Sublette counties, Wyoming: U., S. Geological Survey map I–686.</ref> and by interpreting satellite images such as the one shown in [[:file:exploring-for-structural-traps_fig20-6.jpg|Figure 2]]. Individual major thrust sheets were defined across the belt as well as their change in character along strike, thus defining domains on a large scale. Note that the small white rectangle in the center of the satellite image is the approximate area seen in the oblique aerial photograph in [[file:exploring-for-structural-traps_fig20-12.png|Figure 8]].

==Prospective structural fairways==

==Prospective structural fairways==

[[file:exploring-for-structural-traps_fig20-7.png|thumb|{{figure number|3}}.]]

[[file:exploring-for-structural-traps_fig20-7.png|thumb|{{figure number|3}}.]]

[[file:exploring-for-structural-traps_fig20-8.png|thumb|{{figure number|20-8}}.]]

[[file:exploring-for-structural-traps_fig20-8.png|thumb|{{figure number|4}}.]]

Within the structural domains, regional analysis of structural style and timing were integrated with other elements of the hydrocarbon system to define prospective fairways. [[:file:exploring-for-structural-traps_fig20-7.png|Figure 3]] covers approximately the same area as the preceding satellite image and shows the location of the major thrust sheets in the Wyoming thrust belt. Note that most of the oil and gas fields occur in the southern half of the Absaroka thrust sheet.

Within the structural domains, regional analysis of structural style and timing were integrated with other elements of the hydrocarbon system to define prospective fairways. [[:file:exploring-for-structural-traps_fig20-7.png|Figure 3]] covers approximately the same area as the preceding satellite image and shows the location of the major thrust sheets in the Wyoming thrust belt. Note that most of the oil and gas fields occur in the southern half of the Absaroka thrust sheet.

[[file:exploring-for-structural-traps_fig20-11.png|thumb|{{figure number|7}}. Copyright: Lamerson, 1982; courtesy Rocky Mountain Assoc. of Geologists.]]

[[file:exploring-for-structural-traps_fig20-11.png|thumb|{{figure number|7}}. Copyright: Lamerson, 1982; courtesy Rocky Mountain Assoc. of Geologists.]]

The oblique aerial photograph below shows structures in the upper plate of the Absaroka thrust in the central Wyoming thrust belt, updip and along strike of the producing structures in the same thrust sheet to the south. (See Figure 20-6 for the location.)

The oblique aerial photograph in [[:file:exploring-for-structural-traps_fig20-12.png|Figure 8]] shows structures in the upper plate of the Absaroka thrust in the central Wyoming thrust belt, updip and along strike of the producing structures in the same thrust sheet to the south. (See Figure 20-6 for the location.)

[[file:exploring-for-structural-traps_fig20-12.png|thumb|{{figure number|20-12}}See text for explanation.]]

[[file:exploring-for-structural-traps_fig20-12.png|thumb|{{figure number|8}}See text for explanation.]]

The tectonic setting and stratigraphic section are similar to the producing trend; therefore, the deformation features of the exposed structures can be used as analogs for producing structures to the south. The numbered ridge lines in the photo provide a set of natural serial cross sections through the structures, detailed below.

The tectonic setting and stratigraphic section are similar to the producing trend; therefore, the deformation features of the exposed structures can be used as analogs for producing structures to the south. The numbered ridge lines in the photo provide a set of natural serial cross sections through the structures ([[:file:exploring-for-structural-traps_fig20-13.png|Figure 9]].

[[file:exploring-for-structural-traps_fig20-13.png|thumb|{{figure number|20-13}}See text for explanation.]]

[[file:exploring-for-structural-traps_fig20-13.png|thumb|{{figure number|9}}See text for explanation.]]

The photograph below shows structures in the upper plate of the Absaroka thrust fault on the south side of ridge line 4 in Figure 20-12. The white outcrops in the valley in the left foreground are tightly folded Ordovician Bighorn dolomite.

[[:file:exploring-for-structural-traps_fig20-14.png|Figure 10]] shows structures in the upper plate of the Absaroka thrust fault on the south side of ridge line 4 in [[:file:exploring-for-structural-traps_fig20-12.png|Figure 8]]. The white outcrops in the valley in the left foreground are tightly folded Ordovician Bighorn dolomite.

[[file:exploring-for-structural-traps_fig20-14.png|thumb|{{figure number|20-14}}See text for explanation.]]

[[file:exploring-for-structural-traps_fig20-14.png|thumb|{{figure number|10}}See text for explanation.]]

==Prospect and location==

==Prospect and location==