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Line 17: − Consider the cross section below from the Papers Wash field from the San Juan Basin, New Mexico. The cross section shows that three separate prospects (traps) were tested (drilled). The deepest trap was filled to the spill point with oil, the middle trap was partially filled, and the shallowest trap was empty. This arrangement suggests that oil migrated to the traps from a mature source rock downdip to the north by filling the traps in sequence. − + − If these three prospects had not been tested, which would we drill first? With an understanding of the petroleum system that charged these prospects, we could be more confident in recommending which prospect to drill first. If we knew that mature source rock was located directly under the reservoir, then we would expect all traps to be filled an equal amount (below, left). Conversely, if we knew that the source was mature downdip to the north, then we would drill the deepest prospect, not the middle or shallowest prospect to the south (below, right).+ − + + +
Petroleum system concept: examples of application (view source)
Revision as of 19:43, 20 January 2014
, 19:43, 20 January 2014→Local example
==Local example==
==Local example==
[[file:petroleum-systems_fig3-21.png|thumb|{{figure number|3-21}}.]]
[[file:petroleum-systems_fig3-21.png|left|thumb|{{figure number|1}}.]]
[[file:petroleum-systems_fig3-22.png|thumb|{{figure number|2}}. Copyright: Barker, 1992; courtesy Oklahoma Geological Society.]]
[[file:petroleum-systems_fig3-22.png|thumb|{{figure number|3-22}}. Copyright: Barker, 1992; courtesy Oklahoma Geological Society.]]
Consider [[:file:petroleum-systems_fig3-21.png|Figure 1]], a cross section from the Papers Wash field from the San Juan Basin, New Mexico. The cross section shows that three separate prospects (traps) were tested (drilled). The deepest trap was filled to the spill point with oil, the middle trap was partially filled, and the shallowest trap was empty. This arrangement suggests that oil migrated to the traps from a mature source rock downdip to the north by filling the traps in sequence.
If these three prospects had not been tested, which would we drill first? With an understanding of the petroleum system that charged these prospects, we could be more confident in recommending which prospect to drill first. If we knew that mature source rock was located directly under the reservoir, then we would expect all traps to be filled an equal amount ([[:file:petroleum-systems_fig3-22.png|Figure 2A]]). Conversely, if we knew that the source was mature downdip to the north, then we would drill the deepest prospect, not the middle or shallowest prospect to the south ([[:file:petroleum-systems_fig3-22.png|Figure 2B]]).
==Regional-scale applications==
==Regional-scale applications==