Journal
MARINE AND PETROLEUM GEOLOGY
Volume 67, Issue -, Pages 460-467Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.marpetgeo.2015.05.030
Keywords
Crude oil; Source dependent parameters; Sedimentary organic fades; Tricyclic terpanes; Tetracyclic terpanes
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Funding
- Ministry of Finance
- Project of on-site sediment microbial remediation of public area of central Bohai Sea, North China Sea Branch of State Oceanic Administration [QDZC20150420-002]
- Key Projects in the Yantai Science & Technology Pillar Program [2011060]
- National Natural Science Foundation of China [40806048]
- [2011ZX05001-001]
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Composition and distribution of tricyclic terpanes, tetracyclic terpanes and hopane in crude oils from Tarim, Turpan, Ordos and Qaidam basins, NW China, were investigated, and some new source dependent parameters were developed and evaluated. C-19 and C-20 tricyclic terpanes are more abundant in terrigenous oils, with C-24 tetracyclic terpane dominant. Relatively higher carbon number tricyclic terpanes, especially C-23 tricyclic terpane, are often the dominant homologues in crude oils from saline lacustrine and marine sources. On the whole, the relative content of C-23 tricyclic terpane of crude oils follow the order of saline lacustrine oils > marine oils > freshwater lacustrine oils > terrigenous oils for C19-23 tricyclic terpane. Some new parameters based on the tricyclic/hopane and tetracyclic/tricyclic terpane as well as tetracyclic/hopane ratios, could be used to distinguish the oils and source rocks with similar maturity deposited in different sedimentary environments. (C) 2015 Elsevier Ltd. All rights reserved.
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