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Petroleum system: geographic, stratigraphic, and temporal extent (view source)
Revision as of 17:22, 29 April 2014
, 17:22, 29 April 2014→Events chart example
==Events chart example==
==Events chart example==
[[file:petroleum-systems_fig3-6.png|thumb|{{figure number|4}}.]]
[[file:petroleum-systems_fig3-6.png|thumb|{{figure number|4}}Events chart for the fictitious Deer-Boar(.) petroleum system.]]
A petroleum system events chart shows time on one axis and the essential elements and processes on the other. The time required for the generation-migration-accumulation process is the same as the age of the system. The chart also shows the preservation time and critical moment for the system. [[:ile:petroleum-systems_fig3-6.png|Figure 4]] depicts the events chart for the fictitious Deer-Boar(.) petroleum system.
A petroleum system events chart shows time on one axis and the essential elements and processes on the other. The time required for the generation-migration-accumulation process is the same as the age of the system. The chart also shows the preservation time and critical moment for the system. [[:file:petroleum-systems_fig3-6.png|Figure 4]] depicts the events chart for the fictitious Deer-Boar(.) petroleum system.
The events chart is arranged according to increasing difficulty. For example, mapping and dating the essential elements of a petroleum system are usually easier than mapping and determining the time over which the processes took place. Because the petroleum system deals only with discovered accumulations, there is no question that the elements and processes worked correctly to make oil and gas fields. Later, however, the events chart is transformed into a risk chart to better evaluate a play or prospect.
The events chart is arranged according to increasing difficulty. For example, mapping and dating the essential elements of a petroleum system are usually easier than mapping and determining the time over which the processes took place. Because the petroleum system deals only with discovered accumulations, there is no question that the elements and processes worked correctly to make oil and gas fields. Later, however, the events chart is transformed into a risk chart to better evaluate a play or prospect.