富有机质泥页岩纳米级孔隙结构特征研究进展
- 宋董军1,2,3,
- 妥进才1,2, ,
- 王晔桐1,2,3,
- 吴陈君1,2,
- 张明峰1,2
- 1. 中国科学院西北生态环境资源研究院, 兰州 730000;
- 2. 甘肃省油气资源研究重点实验室, 兰州 730000;
- 3. 中国科学院大学, 北京 100049
基金项目:
国家自然科学基金项目（41672127，41602151）；中国科学院西部青年学者项目
作者简介:
宋董军,男,1993年出生,博士研究生,油气地质与地球化学,E-mail:songdongjun16@mails.ucas.ac.cn
- 收稿日期:
2018-07-09
- 修回日期:
2019-03-13
- 刊出日期:
2019-12-10
摘要: 阐明富有机质泥页岩孔隙结构特征对阐明页岩油气的赋存机理和勘探开发具有重要的意义。研究泥页岩孔隙结构特征的方法主要包括定量和定性两类，实际研究中常将二者结合使用。有机质含量（TOC）、热演化程度、有机质母质来源、矿物组成及构造变形作用等因素对富有机质泥页岩孔隙结构特征有重要影响。有机质母质来源决定了纳米有机质孔的发育潜能，TOC和矿物组成控制了孔隙的发育类型，而热演化程度决定了孔隙的演化行为，构造变形作用对于纳米孔有后期改造作用。生排烃热模拟实验由于可以人为地控制实验条件，在泥页岩孔隙结构演化研究中扮演了重要的角色，但要注意与实际地质条件相匹配。目前，富有机质泥页岩孔隙结构的演化模式还存在较大的争议。受控于有机质母质来源，不同沉积环境下发育的富有机质泥页岩孔隙结构演化模式存在差异，因此需要分别研究。在未来工作中，TOC对泥页岩孔隙结构特征的影响、有机质孔开始形成的成熟度以及高演化阶段（镜质体反射率Ro>3%）孔隙的演化行为及机理等问题都需要进一步探究。另外，扫描电镜下识别有机质显微组成的方法亟需建立，同时还要规范行业术语的应用，以减少学科研究的混乱现象。
Research Advances on Characteristics of Nanopore Structure of Organic-rich Shales
- SONG DongJun
1,2,3,
- TUO JinCai
1,2, ,
- WANG YeTong
1,2,3,
- WU ChenJun
1,2,
- ZHANG MingFeng
1,2
- 1. Northwest Institute of Eco Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
- 2. Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou 730000, China;
- 3. University of Chinese Academy of Sciences, Beijing 100049, China
Funds:
National Natural Science Foundation of China, No. 41672127, 41602151; CAS "Light of West China" Program
- Received Date:
2018-07-09
- Rev Recd Date:
2019-03-13
- Publish Date:
2019-12-10
Abstract: A full understanding of the properties of the pore structure in organic-rich shales is beneficial for determining the shale oil and gas accumulation mechanism,and thus is significant in guiding exploration and exploitation. Methods of characterizing the pore structure of organic-rich shales embody quantitative analysis and qualitative description,both of which should be combined during investigations. Factors such as total organic carbon(TOC),thermal maturity,origin of organic matter,mineral constituents and tectonism have considerable impacts on the nature of the pore structure in organic-rich shales. Of these,the origin of organic matter determines the potential for organic pores formation;TOC and mineralogy control the types of nanopores;and thermal maturity influences nanopore evolution. Tectonism has a secondary effect,in that it may modify the nanopore structure. Pyrolysis experiments play a crucial role in investigating the evolution of pore structure in shales,since the factors are controlled artificially;however,experimental conditions should match the actual geological conditions. At present,pore structure evolution in shales is still inconclusive and controversial. Due to the diverse origins of organic matter,the evolution of the pore structure in organic-rich shales may differ from one sedimentary environment to another,and thus require further separate study. Dilemmas such as the impacts of TOC on the characteristics of pores in shales,the mature stage of the development of secondary organic pores and the evolutionary scenarios and mechanisms of pores at the envolution stage (Ro>3%) need to be further explored. In addition,the methods identifying the microscopic compositions of organic matter using scanning electron microscopy need to be established,and the usage of some terminologies should be standardized to reduce the confusion that is currently caused by researchers who engage in different fields.
宋董军, 妥进才, 王晔桐, 吴陈君, 张明峰. 富有机质泥页岩纳米级孔隙结构特征研究进展[J]. 沉积学报, 2019, 37(6): 1309-1324. doi: 10.14027/j.issn.1000-0550.2019.030
SONG DongJun, TUO JinCai, WANG YeTong, WU ChenJun, ZHANG MingFeng. Research Advances on Characteristics of Nanopore Structure of Organic-rich Shales[J]. Acta Sedimentologica Sinica, 2019, 37(6): 1309-1324. doi: 10.14027/j.issn.1000-0550.2019.030
| Citation: |
SONG DongJun, TUO JinCai, WANG YeTong, WU ChenJun, ZHANG MingFeng. Research Advances on Characteristics of Nanopore Structure of Organic-rich Shales[J]. Acta Sedimentologica Sinica, 2019, 37(6): 1309-1324. doi: 10.14027/j.issn.1000-0550.2019.030
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