Page 91 - The Petroleum System From Source to Trap
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82 Demaison and Huizinga
\
\
' Top Oil
'\ T o p Gas Window
Shale seal Window 200 m �
0
�
f-'_-=s � l Shale (source rock) 40 k m.
Figure 4.5. Example of a supercharged, laterally drained, high-impedance petroleum system, patterned after the North Slope
of Alaska, U.S.A.
�
"'-.. Lateral oil migration
in porous carbonates
below unconformity
L-..�1 Shale seal
f"j...! s-1 Shale (source rock)
500 m ._[
Vertical Oil
Migration _ _ _ _ ___.
80 k m
Figure 4.6. Example of a normally charged, laterally drained, low-impedance petroleum system, patterned after the Williston
basin, U.S.A.
°
< 1 0 API
Shale seal
f..§. --=-s-=-S._i Shale ( s ource rock)
Figure 4.7. Example of a supercharged, laterally drained, low-impedance petroleum system, patterned after the eastern
Venezuela foreland basin. Large accumulations of heavy oil are found near the margins of the petroleum system in the
shallow Immature sedimentary strata.
