湖页岩系统中的孔隙结构演变和地质控制对海洋页岩水库特征有影响
Hu Li1,2,3,4,5, Ziqiang Xu6, Xiaodan Gao7,8
1School of Economics, Sichuan University of Science and Engineering, Yibin, 644000, China. lihu860628@126.com.
Scientific reports
|May 21, 2025
概括
湖页岩孔隙系统与海洋系统有很大的不同,具有独特的粘土和有机物质影响. 这些淡水系统保留了更多的微美索,为评估海洋页岩水库提供了有价值的见解.
科学领域:
- 地质地质地质地质地质地
- 石油地质学 石油地质学
- 沉积物学的沉积物学
背景情况:
- 湖页岩储备对能源资源至关重要.
- 了解毛孔结构的演变是水库特征的关键.
- 海洋页岩系统提供了一个比较框架.
研究的目的:
- 为了研究湖泊页岩系统中孔隙结构的演变.
- 为了与海洋页岩相比较湖孔状特征.
- 建立一个非海洋毛孔发展的框架.
主要方法:
- 综合石油学和石油物理分析.
- 低温吸附 (LTNA) 用于孔径大小的分布.
- 整个岩石X射线衍射 (XRD) 和扫描电子显微镜 (SEM) 用于矿物学和微纹理.
主要成果:
- 湖系统中的以粘土为主导的毛孔显示出明显的进化路径,以illite/smectite产生间隙孔.
- 有机物孔由于III型煤化和碳化合物生成,具有有限的连接性.
- 淡水页岩保留的微半孔体积比类似成熟度的海洋页岩高30-40%.
结论:
- 岩页岩孔隙结构的发展受到淡水环境中的粘土生成的影响.
- 有机物质的特征和diagenesis在湖泊系统中创建独特的孔隙网络.
- 这些发现为海洋页岩水库评估提供了有价值的类比,特别是在过渡盆地.
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