Changes

==Index map==

==Index map==

[[file:predicting-reservoir-system-quality-and-performance_fig9-85.png|300px|thumb|{{figure number|1}}From Sonnenberg.<ref name=Sonnenberg_1985>Sonnenberg, S. A., 1985, Tectonic and sedimentation model for Morrow sandstone deposition, Sorrento field area, Denver basin, Colorado: The Mountain Geologist, October, p. 180-191.</ref> Courtesy Rocky Mountain Association of Geologists.]]

[[file:predicting-reservoir-system-quality-and-performance_fig9-85.png|300px|thumb|{{figure number|1}}Location of the Sorrento field. From Sonnenberg.<ref name=Sonnenberg_1985>Sonnenberg, S. A., 1985, Tectonic and sedimentation model for Morrow sandstone deposition, Sorrento field area, Denver basin, Colorado: The Mountain Geologist, October, p. 180-191.</ref> Courtesy Rocky Mountain Association of Geologists.]]

The Sorrento field is in southeastern Colorado on the north flank of the Las Animas Arch. The map in [[:file:predicting-reservoir-system-quality-and-performance_fig9-85.png|Figure 1]] shows the location of the Sorrento field. Structure is contoured on the base of the Pennsylvanian.

The Sorrento field is in southeastern Colorado on the north flank of the Las Animas Arch. The map in [[:file:predicting-reservoir-system-quality-and-performance_fig9-85.png|Figure 1]] shows the location of the Sorrento field. Structure is contoured on the base of the Pennsylvanian.

==Morrow structure map==

==Morrow structure map==

[[file:predicting-reservoir-system-quality-and-performance_fig9-86.png|300px|thumb|{{figure number|1}} From Sonnenberg.<ref name=Sonnenberg_1985 /> Courtesy Rocky Mountain Association of Geologists.]]

[[file:predicting-reservoir-system-quality-and-performance_fig9-86.png|300px|thumb|{{figure number|1}}Circled wells represent Marmaton wells; triangles, Mississippian wells; and large X's, study wells. The rest of the oil wells produce from the Morrow. Each unit in the grid is 1 sq mi. From Sonnenberg.<ref name=Sonnenberg_1985 /> Courtesy Rocky Mountain Association of Geologists.]]

The Sorrento field reservoir is [[Pennsylvanian]] Morrow [[valley-fill sandstone]]s. As shown in the figure below, structure [[contour]]s on a marker bed above the [[Morrow Sandstone]] reflect the irregular thickness of the sandstone body and a small structural [[nose]] and [[closure]]. The oil column is [[length::70 ft]] [[depth::(20 m]]) and exceeds structural closure. This is a combination [[Structural trap system|structural]]-[[stratigraphic trap]]. [[Lithofacies_and_environmental_analysis_of_clastic_depositional_systems#Braided_and_meandering_fluvial_deposits|Fluvial sandstones]] lap onto marine shale at the margins of the valley, forming lateral [[seal]]s.

The Sorrento field reservoir is [[Pennsylvanian]] Morrow [[valley-fill sandstone]]s. As shown in [[:file:predicting-reservoir-system-quality-and-performance_fig9-86.png|Figure 2]], structure [[contour]]s on a marker bed above the [[Morrow Sandstone]] reflect the irregular thickness of the sandstone body and a small structural [[nose]] and [[closure]]. The oil column is [[length::70 ft]] [[depth::(20 m]]) and exceeds structural closure. This is a combination [[Structural trap system|structural]]-[[stratigraphic trap]]. [[Lithofacies_and_environmental_analysis_of_clastic_depositional_systems#Braided_and_meandering_fluvial_deposits|Fluvial sandstones]] lap onto marine shale at the margins of the valley, forming lateral [[seal]]s.

In [[:file:predicting-reservoir-system-quality-and-performance_fig9-86.png|Figure 2]], circled wells represent [[Marmaton]] wells; triangles, [[Mississippian]] wells; and large X's, study wells. The rest of the oil wells produce from the Morrow. Each unit in the grid is 1 sq mi.

In [[:file:predicting-reservoir-system-quality-and-performance_fig9-86.png|Figure 2]], circled wells represent [[Marmaton]] wells; triangles, [[Mississippian]] wells; and large X's, study wells. The rest of the oil wells produce from the Morrow. Each unit in the grid is 1 sq mi.