Journal
ENERGY EXPLORATION & EXPLOITATION
Volume 38, Issue 2, Pages 333-347Publisher
SAGE PUBLICATIONS INC
DOI: 10.1177/0144598719862922
Keywords
Mesoproterozoic; molecular marker; oil source correlation; oil reservoir; Liaoxi Depression
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Funding
- National Key Research and Development Program of China [2017YFC0603102]
- National Natural Science Foundation of China [41730424]
- China Geological Survey Programs [121201007000150074]
- Liaohe Oilfield Company
- CNPC (Oil Accumulation Mechanism of Meso-Neoproterozoic Oil Reservoir in the Liaoxi Depression, NE China)
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Oil reservoirs have been discovered in the Mesoproterozoic strata in the Liaoxi Depression, NE China. In order to determine the source of oil shows of the Mesoproterozoic Gaoyuzhuang Formation and their organic geochemical characteristics, eight source rocks and reservoir cores from the Mesoproterozoic Gaoyuzhuang Formation and four source rocks from the overlying Middle Jurassic Haifanggou Formation were geochemically analysed. The distribution patterns of normal alkanes, acyclic isoprenoids, hopanes, steranes and triaromatic steroids of the Mesoproterozoic hydrocarbons from Well N-1 are consistent with those of source rock extracts from the Mesoproterozoic Gaoyuzhuang Formation in the Well L-1. The molecular marker compositions of source rock extracts from the overlying Middle Jurassic Haifanggou Formation are distinctively different from those of the Mesoproterozoic hydrocarbons. The results suggest that the Mesoproterozoic source rocks have significant petroleum generation potential. The Mesoproterozoic paleo-reservoir may be prospecting exploration targets in the Liaoxi Depression, NE China.
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