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Abstract

Summary

Analysis of δ13 C aromatics and saturates hydrocarbons plus extracts from source rocks plots in graphical diagram as well as their δ13C% and C28/C29 ratio of source age sterane biomarkers of 300 scattered Crude oil samples have enabled this study to assess hydrocarbons grouping into families’ related to sedimentary basins in Iraq. Oil sources might be Middle Jurassic strata of Sargelu Formation in the Zagross Fold Belt of North Iraq and eastern part of Mesan Governorate with Middle Jurassic as well as Upper Jurassic/ Lower Cretaceous Chia Gara Formation in the North-East based on C28/C29 ratio of nearly 6 and 8 respectively. Mesopotamian Basin oil sources are of mainly Upper Jurassic/ Lower Cretaceous Sulaiy Formation above the Upper Jurassic lower regional seal of the Gotnia Anhydrite except were thinned and faulted with C28/C29 ratio ranges between 5– 9 that could cause mixing with Middle Jurassic Sargelu Formation oil. Middle Triassic oil in North West Iraq is recorded within Kurra Chine Formation with C28/ C29 ratio of 4 while Lower Palaeozoic oil sources are recorded in West Iraq. On the other hand, one formation may have multiple pays of Jurassic and Lower Cretaceous sources such as Zubair and Yamama Formation.

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/content/papers/10.3997/2214-4609.201414371
2015-11-16
2024-03-28
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