基于轻烃恢复的不同赋存状态页岩油定量评价——以准噶尔盆地玛湖凹陷风城组页岩为例

doi:10.7623/syxb202605005

石油学报 ›› 2026, Vol. 47 ›› Issue (5): 1014-1023.DOI: 10.7623/syxb202605005

• 地质勘探 • 上一篇

基于轻烃恢复的不同赋存状态页岩油定量评价——以准噶尔盆地玛湖凹陷风城组页岩为例

田华¹, 赵小琳², 郭小文², 袁圣强¹, 李芷芸¹

1. 中国石油勘探开发研究院北京 100083;
2. 中国地质大学(武汉)构造与油气资源教育部重点实验室湖北武汉 430074

收稿日期:2025-08-13 修回日期:2025-12-19 发布日期:2026-06-09
通讯作者: 郭小文,男,1980年7月生,2010年获中国地质大学(武汉)博士学位,现为中国地质大学(武汉)教授、博士生导师,主要从事油气地质研究。Email:guoxw@cug.edu.cn
作者简介:田华,男,1986年12月生,2020年获中国石油勘探开发研究院博士学位,现为中国石油勘探开发研究院高级工程师,主要从事深层与非常规油气地质实验研究。Email:tianhua86@petrochina.com.cn
基金资助:
中国石油天然气股份有限公司科技项目“页岩油储层孔喉石油赋存机理与可动性评价技术研究”(2021DJ0104)和“流-固耦合作用烃类赋存、运移与富集机制”(2025DJ10204)资助。

Quantitative evaluation of shale oil in different occurrence states based on light hydrocarbon recovery: a case study of the Fengcheng Formation shale in Mahu sag,Junggar Basin

Tian Hua¹, Zhao Xiaolin², Guo Xiaowen², Yuan Shengqiang¹, Li Zhiyun¹

1. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China;
2. Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Hubei Wuhan 430074, China

Received:2025-08-13 Revised:2025-12-19 Published:2026-06-09

摘要/Abstract

摘要： 定量评价不同赋存状态的页岩油对于深入认识页岩油的富集机理和资源潜力具有重要意义。通过采用不同极性溶剂对多粒级页岩样品进行分步抽提,结合岩石热解分析,对页岩中的轻烃损失量进行恢复,定量分析了页岩中的游离油含量和束缚油含量及其控制因素。研究结果表明,在选用的准噶尔盆地玛湖凹陷风城组页岩样品中,大部分轻烃已散失,其损失的轻烃含量占饱和烃含量的60 % 以上,恢复后的游离油含量达到恢复前的近3倍。玛湖凹陷风城组页岩的总含油量为2.42~27.06 mg/g,其中,游离油含量为1.43~24.85 mg/g。恢复后的页岩的总含油量和游离油含量与其总有机碳(TOC)含量和岩石热解参数S₁(游离烃含量)呈明显的正相关,证实TOC含量对风城组页岩的含油性具有重要的控制作用。S₁可以用于评价页岩中游离油相对含量的高低,要实现对游离油含量的绝对定量评价,需要对损失的轻烃量进行恢复。基于轻烃恢复的页岩油的定量表征方法可为页岩油资源评价提供重要参数。

关键词: 页岩油, 赋存状态, 轻烃恢复, 游离油, 准噶尔盆地

Abstract: Quantitative evaluation of shale oil in different occurrence states is of critical importance for gaining deeper insight into shale oil enrichment mechanisms and resource potential. In this study, light hydrocarbon losses in shale are recovered through a stepwise extraction approach applied to multi-grain shale samples using solvents with different polarities, in combination with Rock-Eval pyrolysis analysis. On this basis, a quantitative evaluation is performed on the contents of free oil and bound oil in shale, as well as their controlling factors. The results show that in the shale samples from Fengcheng Formation in Mahu sag of Junggar Basin, the majority of light hydrocarbons have been lost. These loses account for nearly 60 % of the saturated hydrocarbon content, and the recovered free oil content is nearly three times that prior to recovery. The total oil content in the Fengcheng Formation shale in Mahu sag ranges from 2.42 mg/g to 27.06 mg/g, among which the free oil content ranges from 1.43 mg/g to 24.85 mg/g. After recovery, both the total oil content and free oil content of shale exhibit pronounced positive correlations with the total organic carbon (TOC) content and the rock pyrolysis parameter S₁ (free liquid hydrocarbon content). This confirms that TOC content plays a predominant role in controlling the oil-bearing capacity of the Fengcheng Formation shale. S₁ can be used to assess the relative abundance of free oil in shale. However, absolute quantitative evaluation of free oil content necessitates the restoration of the lost light hydrocarbons. The quantitative characterization method for shale oil based on light hydrocarbon recovery provides important parameters for shale oil resource assessment.

Key words: shale oil, occurrence state, light hydrocarbon recovery, free oil, Junggar Basin

中图分类号:

TE135.2

田华, 赵小琳, 郭小文, 袁圣强, 李芷芸. 基于轻烃恢复的不同赋存状态页岩油定量评价——以准噶尔盆地玛湖凹陷风城组页岩为例[J]. 石油学报, 2026, 47(5): 1014-1023.

Tian Hua, Zhao Xiaolin, Guo Xiaowen, Yuan Shengqiang, Li Zhiyun. Quantitative evaluation of shale oil in different occurrence states based on light hydrocarbon recovery: a case study of the Fengcheng Formation shale in Mahu sag,Junggar Basin[J]. Acta Petrolei Sinica, 2026, 47(5): 1014-1023.

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基于轻烃恢复的不同赋存状态页岩油定量评价——以准噶尔盆地玛湖凹陷风城组页岩为例

Quantitative evaluation of shale oil in different occurrence states based on light hydrocarbon recovery: a case study of the Fengcheng Formation shale in Mahu sag,Junggar Basin

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