Can hydrocarbon source rock be uranium source rock? a review and prospectives

被引：0

作者：

Liu C. ^{[1
,2
,3
]}

Fu X. ^{[1
,3
]}

Li Y. ^{[4
]}

Wang H. ^{[1
,3
]}

Sun B. ^{[1
]}

Hao Y. ^{[1
]}

Hu H. ^{[1
]}

Yang Z. ^{[1
,3
]}

Li Y. ^{[4
]}

Gu S. ^{[4
]}

Zhou A. ^{[4
]}

Ma C. ^{[5
]}

机构：

[1] Institute of Unconventional Oil and Gas, Northeast Petroleum University, Daqing

[2] Institute of Applied Technology, Northeast Petroleum University, Daqing

[3] Ministry of Education Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient Development, Northeast Petroleum University, Daqing

[4] Daqing Oilfield Company Ltd., Daqing

[5] Liaohe Oilfield Company Research Institute of Petroleum Exploration & Development, Panjin

来源：

Earth Science Frontiers | 2024年 / 31卷 / 02期

关键词：

hydrocarbon source rocks; metallogenetic mechanism; mobile; oil and gas; sandstone-hosted uranium deposit; source of uranium;

D O I：

10.13745/j.esf.sf.2023.5.33

中图分类号：

学科分类号：

摘要：

The coexistence of hydrocarbon source rocks and sandstone-hosted uranium (U) deposits in the same basin has been widely reported. Hydrocarbon source rock contributes to uranium precipitation and enrichment by providing oil and gas; whereas, whether it can be a source of uranium supply is of great relevance as to weather uranium prospecting should expand deep into the basin. This study reviews relevant domestic and international studies and offers perspectives on this topic, focusing on three key issues: migration potential of uranium in source rock, possible ways of uranium transport by formation fluids, and mechanisms of uranium precipitation and accumulation. Hydrothermal modeling results show that uranium migration can occur during hydrocarbon generation and expulsion, and the migrated-uranium, probably a mix of U(IV) and U(VI), is likely transported by both hydrocarbon-bearing formation water and oils. The transported-uranium precipitates due to a decrease of uranium solubility and decomposition of the transport fluids caused by a decrease of temperature and pressure and change of pH and Eh; the uranium precipitates can also redissolve in oxygen-rich formation water. The main perspectives are: (1) the amount of migrated-uranium is uncertain, and the mechanism and laws of U migration are still unclear, thus further modeling experiments on source rock-uranium system is recommended to understand the kinetics of uranium migration. (2) Up to now, little is known about the dominant U mobile forms and their thermodynamic properties and distribution between hydrocarbon-bearing formation water and oil, thus, in-situ thermal testing via thermal simulation experiments is recommended to address this issue. (3) During uranium upward transport, changes in temperature, pressure, Eh, and organic/inorganic components of the transport fluids control uranium geochemistry, thereby, in order to understand uranium geochemistry and its controlling factors under different conditions, multi-variable simulation experiments on hydrocarbon-uranium transport is suggested. © 2024 Science Frontiers editorial department. All rights reserved.

引用

页码：284 / 298

页数：14

共 68 条

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