Article

Petroleum Geology & Experiment

, 37:13

First online:

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Application of tricyclic terpanes in biodegraded oil-source correlation in Biyang Sag

  • Guo PengfeiAffiliated withKey Laboratory of Tectonics & Petroleum Resources of Ministry of Education, China University of GeosciencesFaculty of Resources, China University of Geosciences
  • , He ShengAffiliated withKey Laboratory of Tectonics & Petroleum Resources of Ministry of Education, China University of GeosciencesFaculty of Resources, China University of Geosciences
  • , Zhu ShukuiAffiliated withKey Laboratory of Tectonics & Petroleum Resources of Ministry of Education, China University of GeosciencesFaculty of Resources, China University of Geosciences
  • , Chai DerongAffiliated withKey Laboratory of Tectonics & Petroleum Resources of Ministry of Education, China University of GeosciencesFaculty of Resources, China University of Geosciences
  • , Yin ShiyanAffiliated withCollege of Mining Engineering, Hebei United University

Abstract

Biodegraded oils from the northern slope of the Biyang Sag were analyzed to examine the application of tricyclic terpanes to biodegraded oil-source correlation. Tricyclic terpanes are resistant to biodegradation ( biodegradation rank 8) . New tricyclic terpane parameters, such as (C23-C26/Cl9-C22)-tricyclic terpanes, (Cl9-C26/ C28-C29)-tricyclic terpanes and (C19-C26)-tricyclic terpanes/C29-Ts are effective oil-source correlation parameters. Correlation results suggested that the biodegraded oils in the lower member of Eh 3 on the northern slope of the Biyang Sag came from the mudstones in the lower member of Eh 3 of the central sag, and the oils in the upper member of Eh 3 mainly came from the mudstones in the upper member of Eh 3 of the central sag. The correlation results of oils and source rocks in the Zhu I Depression of the Pearl River Mouth Basin determined by the three tricyclic terpane parameters were consistant with previous results, further supporting the effectiveness of the parameters.

Key words:

tricyclic terpanes biodegraded oils oil-source correlation Biyang Sag Zhu I Depression

利用三环萜烷对比泌阳凹陷生物降解油油源