准噶尔盆地吉木萨尔凹陷二叠系芦草沟组不同源储结构页岩生排油实验研究

李二庭; 潘越扬; 杨光庆; 白海枫; 马万云; 曾溅辉; 张宇

doi:10.11781/sysydz202304705

准噶尔盆地吉木萨尔凹陷二叠系芦草沟组不同源储结构页岩生排油实验研究

doi: 10.11781/sysydz202304705

李二庭^{1, 2,},
潘越扬^{1, 2},
杨光庆³,
白海枫^{1, 2},
马万云^{1, 2},
曾溅辉³,
张宇^{1, 2}

1.
新疆页岩油勘探开发重点实验室，新疆克拉玛依 834000
2.
中国石油新疆油田分公司实验检测研究院，新疆克拉玛依 834000
3.
中国石油大学(北京) 地球科学学院，北京 102249

基金项目:

中国石油科技重大专项 2019E-2601

详细信息

作者简介:
李二庭(1988—)，男，博士，高级工程师，从事油气地球化学研究。E-mail: lierting@petrochina.com.cn

中图分类号: TE135
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出版历程
- 收稿日期: 2022-12-20
- 修回日期: 2023-06-20
- 刊出日期: 2023-07-28

Experimental study on hydrocarbon generation and expulsion characteristics of shale with different source-reservoir structures in Lucaogou Formation, Jimsar Sag, Junggar Basin

LI Erting^{1, 2
,},
PAN Yueyang^{1, 2},
YANG Guangqing³,
BAI Haifeng^{1, 2},
MA Wanyun^{1, 2},
ZENG Jianhui³,
ZHANG Yu^{1, 2}

1.
Xinjiang Key Laboratory of Shale Oil Exploration and Development, Karamay, Xinjiang 834000, China
2.
Research Institute of Experiment and Detection, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China
3.
China University of Petroleum (Beijing), College of Geosciences, Beijing 102249, China

摘要

摘要: 准噶尔盆地东部吉木萨尔凹陷二叠系芦草沟组为中国典型陆相页岩油层系。为了探究不同源储组合对烃源岩生排油的影响，基于前人对芦草沟组源储组合类型的划分，利用半封闭热模拟体系，开展不同源储结构芦草沟组页岩生排油实验研究，为页岩油富集规律及“甜点”精细评价提供参考依据。实验结果显示，储夹源型组合模式更有利于排油，源储互层型略低，源夹储型排油效率最低。碎屑岩+烃源岩组合下，储夹源型、源储互层型和源夹储型排油效率分别为35.6%、30.7%、25.6%；碳酸盐岩+烃源岩组合下，储夹源型、源储互层型和源夹储型排油效率分别为27.4%、27.5%、12.3%。结合排出油、储层中接收油及烃源岩中滞留油的族组成特征，发现储集岩中的接收油主要来自邻源供烃，源储距离越远，供烃关系越不明显。储夹源型页岩主要为下部邻源供油的特点，上部碎屑岩储层接收油量为10.7 mg/g，而下部碎屑岩储层接收油量仅为1.4 mg/g；源夹储型页岩以自生自储为主，烃源岩的滞留油含量较高，碎屑岩储层接收油量为6.0 mg/g，烃源岩中滞留油量为21.1 mg/g；源储互层型页岩以邻源供烃为主，自生自储为辅，从烃源岩到储集岩，抽提物族组分变化差异并不大，饱和烃含量分布在22.8%~33.0%，芳烃含量分布在6.2%~15.1%，非烃和沥青质含量分布在28.5%~41.1%和21.0%~30.0%，且储层岩性不同对其生排油效率影响相对较弱，含油性非均质性弱。从不同源储结构页岩生排油效率来看，源储互层型和储夹源型是芦草沟组页岩油勘探的较为有利的配置组合。
- 源储结构 /
- 生排油 /
- 半封闭热模拟 /
- 族组成 /
- 芦草沟组 /
- 吉木萨尔凹陷 /
- 准噶尔盆地
Abstract: The Permian Lucaogou Formation in the Jimusar Sag in the east of the Junggar Basin is a typical continental shale oil series in China. Employing the semi-closed thermal simulation system, an experimental study on hydrocarbon generation and expulsion of shale with different source-reservoir structures was carried out to explore the efficiency and composition characteristics of hydrocarbon generation and expulsion of shale in the Permian Lucaogou Formation with different source-reservoir structures so as to provide reference for the enrichment rule of shale hydrocarbon and the fine evaluation of "sweet spots". The experimental results show that thick reservoir interbedded with thin source rock is more conducive to hydrocarbon expulsion and features the highest hydrocarbon expulsion efficiency, while thin source rock interbedded with thin reservoir features slightly lower hydrocarbon expulsion efficiency, and thick source rock interbedded with thin reservoir features the lowest hydrocarbon expulsion efficiency. When reservoir lithology is clastic rock, the hydrocarbon expulsion efficiency of thick reservoir interbedded with thin source rock, thin source rock interbedded with thin reservoir, and thick source rock interbedded with thin reservoir are 35.6%, 30.7%, and 25.6%, respectively. When reservoir lithology is carbonate rock, the hydrocarbon expulsion efficiency of these three combinations are 27.4%, 27.5%, and 12.3%, respectively. Combined with composition of expelled hydrocarbon, received hydrocarbon in reservoir, and retained hydrocarbon in source rock, it is found that received hydrocarbon in reservoir rock is mainly supplied by neighboring sources, and the farther away from source-reservoir interface, the less relevant relationship between source rock and hydrocarbon in reservoir. Hydrocarbon in reservoir is supplied by lower adjacent source rock in thick reservoir interbedded with thin source rock, and the received hydrocarbon in upper clastic reservoir is 10.7 mg/g, while received hydrocarbon in lower clastic reservoir is only 1.4 mg/g. The thick source rock interbedded with thin reservoir is mainly self-generated and self-stored, and the content of retained hydrocarbon in source rock is high, the received hydrocarbon in upper clastic reservoir is 6.0 mg/g, while retained hydrocarbon in source rock is 21.1 mg/g. Hydrocarbon in reservoir is mainly supplied by lower adjacent source rock and partly from its own source rock in thin source rock interbedded with thin reservoir. There is no significant difference between source rock and reservoir rock in the extraction family, with the content of saturated hydrocarbon in the range of 22.8%-33.0%, aromatics in the range of 6.2%-15.1%, and non-hydrocarbon and asphaltene in the range of 28.5%-41.1% and 21.0%-30.0%. Moreover, different reservoir lithology has relatively weak influence on hydrocarbon generation and expulsion efficiency, and the hydrocarbon-bearing heterogeneity is weak in thin source rock interbedded with thin reservoir. From the perspective of hydrocarbon generation and expulsion efficiency of shale with different source-reservoir structures, thick reservoir interbedded with thin source rock and thin source rock interbedded with thin reservoir are the favorable combinations for hydrocarbon exploration in the shale of the Lucaogou Formation.
- source-reservoir structure /
- hydrocarbon generation and expulsion /
- semi-closed thermal simulation /
- family composition /
- Lucaogou Formation /
- Jimsar Sag /
- Junggar Basin
注释:

利益冲突声明/Conflict of Interests

所有作者声明不存在利益冲突。

All authors disclose no relevant conflict of interests.

作者贡献/Authors’ Contributions

李二庭，马万云，曾溅辉参与实验设计，论文的编写及修改；杨光庆完成实验操作；潘越扬，白海枫，张宇参与论文编写、图件编辑及修改。所有作者均阅读并同意最终稿件的提交。

LI Erting, MA Wanyun and ZENG Jianhui designed the experiment and drafted and revised the manuscript. YANG Guangqing completed the experimental operation. PAN Yueyang, BAI Haifeng and ZHANG Yu participated in drafting and revising the manuscript and drawing the diagrams. All the authors have read the last version of paper and consented for submission.

HTML全文

图 1 准噶尔盆地吉木萨尔凹陷位置及二叠系芦草沟组构造等值线

Figure 1. Location of the Jimsar Sag in the Junggar Basin and tectonic isolines of the Lucaogou Formation in Permian

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图 2 生排油模拟实验中不同源储结构组合模式示意^[19]

Figure 2. Schematic diagram of combination model of source-reservoir structures in hydrocarbon generation and expulsion simulation experiment

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图 3 生排油模拟实验中不同源储结构页岩生油总量及生油产率特征

Figure 3. Characteristics of total hydrocarbon generation and hydrocarbon generation rate of shale with different source-reservoir structures in hydrocarbon generation and expulsion simulation experiment

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图 4 生排油模拟实验中储夹源型页岩排出油量、储集岩接收油量和烃源岩滞留油量

Figure 4. Expelled hydrocarbon, received hydrocarbon in reservoir and retained hydrocarbon in source rocks of thick reservoir interbedded with thin source rock in hydrocarbon generation and expulsion simulation experiment

下载: 全尺寸图片幻灯片

图 5 生排油模拟实验中源夹储型页岩排出油量、储集岩接收油量和烃源岩滞留油量

Figure 5. Expelled hydrocarbon, received hydrocarbon in reservoir and retained hydrocarbon in source rocks of thick source rock interbedded with thin reservoir in hydrocarbon generation and expulsion simulation experiment

下载: 全尺寸图片幻灯片

图 6 生排油模拟实验中源储互层型页岩排出油量、储集岩接收油量和烃源岩滞留油量

Figure 6. Expelled hydrocarbon, received hydrocarbon in reservoir and retained hydrocarbon in source rocks of thin source rock interbedded with thin reservoir in hydrocarbon generation and expulsion simulation experiment

下载: 全尺寸图片幻灯片

图 7 生排油模拟实验中不同源储结构页岩生排油模拟产物族组成特征

Figure 7. Family composition characteristics of product simulated by experiment of hydrocarbon generation and expulsion from shale with different source-reservoir structures in hydrocarbon generation and expulsion simulation experiment

下载: 全尺寸图片幻灯片

图 8 生排油模拟实验中不同源储结构页岩排油效率特征

Figure 8. Hydrocarbon expulsion efficiency of shale with different source-reservoir structures in hydrocarbon generation and expulsion simulation experiment

下载: 全尺寸图片幻灯片

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