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| Detailed analysis of the fairway proceeded using surface and subsurface data. Examples of the data used are shown below. | | Detailed analysis of the fairway proceeded using surface and subsurface data. Examples of the data used are shown below. |
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− | [[:file:exploring-for-structural-traps_fig20-11.png|Figure 8]] shows a cross section across the Whitney Canyon and Ryckman Creek producing structures in the upper plate of the Absaroka thrust. | + | [[:file:exploring-for-structural-traps_fig20-11.png|Figure 8]] shows a [[cross section]] across the Whitney Canyon and Ryckman Creek producing structures in the upper plate of the Absaroka thrust. |
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| [[:file:exploring-for-structural-traps_fig20-9.png|Figure 6]] shows an interpreted seismic line in the approximate location of [[:file:exploring-for-structural-traps_fig20-11.png|Figure 8]]. | | [[:file:exploring-for-structural-traps_fig20-9.png|Figure 6]] shows an interpreted seismic line in the approximate location of [[:file:exploring-for-structural-traps_fig20-11.png|Figure 8]]. |
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| 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 10]]). | | 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 10]]). |
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− | [[: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 9]]. The white [http://www.merriam-webster.com/dictionary/outcrop 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 9]]. The white [http://www.merriam-webster.com/dictionary/outcrop outcrops] in the valley in the left foreground are tightly folded Ordovician Bighorn [[dolomite]]. |
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| ==Prospect and location== | | ==Prospect and location== |
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| Physical models, such as those in [[:file:exploring-for-structural-traps_fig20-16.jpg|Figure 13]], that display structures similar in shape to natural, prospect-scale, thrust-related structures can provide insight on the overall geometry of the prospect and the location of zones of high strain (high [[fracture]] density?) within the structure. These insights can be useful in determining optimal well locations. | | Physical models, such as those in [[:file:exploring-for-structural-traps_fig20-16.jpg|Figure 13]], that display structures similar in shape to natural, prospect-scale, thrust-related structures can provide insight on the overall geometry of the prospect and the location of zones of high strain (high [[fracture]] density?) within the structure. These insights can be useful in determining optimal well locations. |
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− | These models were constructed of originally planar layers of limestone, sandstone, and granite. They were [[Deformation|deformed]] in a pressure vessel at an effective overburden pressure of 15 × 10<sup>3</sup> psi (1 × 10<sup>5</sup> kPa). The top view is a photomicrograph of a model that simulates a thrust ramp. The bottom view simulates the hanging-wall geometry produced by movement along a series of bedding-parallel and ramp segments of a thrust fault. | + | These models were constructed of originally planar layers of [[limestone]], sandstone, and granite. They were [[Deformation|deformed]] in a pressure vessel at an effective overburden pressure of 15 × 10<sup>3</sup> psi (1 × 10<sup>5</sup> kPa). The top view is a photomicrograph of a model that simulates a thrust ramp. The bottom view simulates the hanging-wall geometry produced by movement along a series of bedding-parallel and ramp segments of a thrust fault. |
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| Data on deformation mechanisms, such as fractures and how they affect reservoir properties, are obtained by integrating [http://www.merriam-webster.com/dictionary/outcrop outcrop] fracture data and laboratory estimates of fracture aperture. This integration allows for a direct calculation of fracture [[porosity]] and fracture [[permeability]] for the reservoir. | | Data on deformation mechanisms, such as fractures and how they affect reservoir properties, are obtained by integrating [http://www.merriam-webster.com/dictionary/outcrop outcrop] fracture data and laboratory estimates of fracture aperture. This integration allows for a direct calculation of fracture [[porosity]] and fracture [[permeability]] for the reservoir. |
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| [[Category:Predicting the occurrence of oil and gas traps]] | | [[Category:Predicting the occurrence of oil and gas traps]] |
| [[Category:Exploring for structural traps]] | | [[Category:Exploring for structural traps]] |
| + | [[Category:Treatise Handbook 3]] |