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ORIGINAL RESEARCH article
Front. Mar. Sci.
Sec. Marine Biogeochemistry
Volume 12 - 2025 | doi: 10.3389/fmars.2025.1553799
Instantaneous petroleum charge in the Shunbei reservoirs, Tarim Basin
Provisionally accepted- 1Hubei Key Laboratory of Marine Geological Resources, China University of Geosciences Wuhan, Wuhan, China
- 2Department of Earth, Energy, and Environment, University of Calgary, Calgary, Alberta, Canada
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Instantaneous petroleum charge is uncommon in sedimentary basins, particularly in the Tarim Basin, where petroleum has been accumulated from multiple source rocks with multiple episode charge stages. In the present study, an instantaneous petroleum charge was identified within the No.3 fault zone of the Shunbei reservoirs in the Tarim Basin. The oil from Well Shunbei 3 (SHB3 oil) is considered as an end member close to the stratigraphic maturity of source rock at a certain maturity level with evidence from n-alkanes, isoprenoids, steroids, terpenoids, diamondoids and a series of aromatic hydrocarbons. In comparison to oil samples from the No.1 fault zone, SHB3 oil did not receive the early-charged oil whereas it has not undergone petroleum charging during the very late maturation stages. The end member of instantaneous petroleum charge in Shunbei reservoirs provides valuable insights into petroleum generation, expulsion and charge histories of ultra-deep Ordovician 2 reservoirs in the Tarim Basin.
Keywords: thermal maturity, biomarkers, Instantaneous petroleum charge, Shunbei reservoirs, Tarim Basin
Received: 31 Dec 2024; Accepted: 09 Apr 2025.
Copyright: © 2025 Wang, Huang and Jiang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Qianru Wang, Hubei Key Laboratory of Marine Geological Resources, China University of Geosciences Wuhan, Wuhan, China
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