Page 25 - The Petroleum System From Source to Trap
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1. The Petroleum System 1 7
0 Petroleum systems
North
t
South Nor h
A
Geologic time:
Maximum burial depth
(Critical moment)
Immature
source rock
1 Petroleum system
South N o r th
Top oil window
Pod of active
8 sou rce rock
Geologic time:
Pod of active Maximum burial depth
source rock (Critical moment)
2 Petroleum systems
South North
Top oil window
c Pods of active
source rock
Figure . 7. Three examples of partial or complete petroleum systems at the critical moment. (A) The essential elements are
1
present, but the system is incomplete (thus no petroleum system); (B) one petroleum system; and (C) two petroleum
systems. Notice that the overburden rock creates the geometry of the most recent sedimentary basin and that the source
rock was deposited in a larger, older sedimentary basin.
