Page 27 - The Petroleum System From Source to Trap

1. The Petroleum System 19

Upper Dev n ian
o
sou rce rock:
� O utcrop
� Subsurface
�dge of h r u s t belt
t

8
n
g
Location of oil r o u ps "A" & "8'' Orga i c facies type III & type II
Geographic extent
of petroleum system
d__ Pod of active
.� . source rock
Halo of hydrocarbons

� � �-��-� .
� � .. ·�" )'"

r (!\\

t" c� \

c D
Oil groups vs. organic facies Location of 7 petroleum systems

Figure . 9. Fictitious example #1 , in which one source rock deposited over a continent (North America) forms seven different
1
petroleum systems where the overburden rock is thick enough to form a pod of active source rock. Using oil-oil and
oil-source rock correlations, geochemical logs, and petroleum accumulations and shows, seven petroleum systems can be
mapped.