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. [[:ile:petroleum-systems_fig3-6.png|Figure 4]] depicts the events chart for the fictitious Deer-Boar(.) petroleum system. |