塔里木盆地塔西南地区巴什托与玉北构造带原油差异性比较

云露; 吴悠; 曹自成; 陈红汉; 耿锋; 沙旭光; 苏鹏; 胡守志

doi:10.3799/dqkx.2026.165

Volume 51 Issue 5

May 2026

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Article Navigation > Earth Science > 2026 > 51(5): 1768-1786

Yun Lu, Wu You, Cao Zicheng, Chen Honghan, Geng Feng, Sha Xuguang, Su Peng, Hu Shouzhi, 2026. Difference Comparison of Oil Properties between Bashentuo and Yubei Structures in Southwest Tarim Basin, NW China. Earth Science, 51(5): 1768-1786. doi: 10.3799/dqkx.2026.165

Citation:

Yun Lu, Wu You, Cao Zicheng, Chen Honghan, Geng Feng, Sha Xuguang, Su Peng, Hu Shouzhi, 2026. Difference Comparison of Oil Properties between Bashentuo and Yubei Structures in Southwest Tarim Basin, NW China. Earth Science, 51(5): 1768-1786. doi: 10.3799/dqkx.2026.165

Citation:

Yun Lu, Wu You, Cao Zicheng, Chen Honghan, Geng Feng, Sha Xuguang, Su Peng, Hu Shouzhi, 2026. Difference Comparison of Oil Properties between Bashentuo and Yubei Structures in Southwest Tarim Basin, NW China. Earth Science, 51(5): 1768-1786. doi: 10.3799/dqkx.2026.165

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Difference Comparison of Oil Properties between Bashentuo and Yubei Structures in Southwest Tarim Basin, NW China

doi: 10.3799/dqkx.2026.165

Yun Lu^1
,,
Wu You^{2
,
,},
Cao Zicheng¹,
Chen Honghan^{3
,
,},
Geng Feng¹,
Sha Xuguang¹,
Su Peng¹,
Hu Shouzhi³

1.
Northwest Oilfield Company, SINOPEC, Urumqi 830011, China
2.
School of Geosciences, Yangtze University, Wuhan 430100, China
3.
School of Earth Resources, China University of Geosciences (Wuhan), Wuhan 430074, China

Received Date: 2026-02-09
Publish Date: 2026-05-25

Abstract

Abstract

Since 1952, more than 70 years of the petroleum exploration in the southwest depression of Tarim basin have witnessed the discovery of.several petroleum fields including Bashentuo and Yubei etc., but there is a huge gap for petroleum exploration in comparison with Tabei depression. The key factor is the long-standing argument of uncertain hydrocarbon sources constraining the deployment in this area. In this research, 34 crude oil samples in Tarim basin have been collected to analyze their aryl isoprenoids, sulfur isotopic ratio and composite specific carbon isotopic ratio, which has been utilized for oil correlation and difference comparison of oil properties between Bashentuo and Yubei structures by cooperating stable carbon isotopic ratios of kerogens and bulk oils and hydrocarbon charging process. Several significant results have been obtained as follows. (1) The hydrocarbon in Yubei structure mainly comes from the Lower Cambrian Yuertusi Formation (∈₁y) source rock, and from Xiaoerbulake Formation (∈₁x) source rock locally. The hydrocarbon in Bashentuo structure possibly mainly comes from the Lower Cambrian Xiaoerbulake Formation (∈₁x) source rock, and from the Carboniferous and Permian source rocks locally. (2) Three hydrocarbon charging events occurred in Yubei structure during the middle Hycynian, the late Hycynian and Himalayan, respectively, and the first and second events consist of the main charging hydrocarbons which underwent quite strong biodegradation; only two charging events took place in Bashentuo structure during the late Hycynian and the Himalayan, respectively, and the second event is composed of the main charging hydrocarbon, and the first charging oil underwent weak biodegradation locally. (3) The reasons of light oil and condensate accumulated in Bashentuo structure and medium quality oil accumulated in Yubei structure are due to the differences of sources, charging events and degrees of biodegradation during the late Hycynian. Therefore, the key for the future exploration is to reinforce the geochemical study of source rocks of Xiaoerbulake Formation and the Carboniferous and Permian in the southwest Tarim basin.
- oil and source correlation,
- aryl isoprenoid,
- isotope,
- Bashentuo hydrocarbon reservoir,
- Yubei hydrocarbon reservoir,
- Southwest Tarim basin,
- petroleum geology

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References(68)

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Difference Comparison of Oil Properties between Bashentuo and Yubei Structures in Southwest Tarim Basin, NW China

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