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DOI	10.1007/s11053-021-09946-x
	Opposite Contributions of Types I and II Organic Matter to Nanoporosity in Lacustrine Shale
	Li, Jing; Li, Pengpeng; Zhou, Shixin; Meng, Bingkun; Sun, Zexiang; Zhang, Xiaodong
通讯作者	Li, PP ; Zhou, SX (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China. ; Li, PP ; Zhou, SX (通讯作者)，Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China. ; Li, PP (通讯作者)，Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
发表日期	2021
ISSN	1520-7439
EISSN	1573-8981
起始页码	4843
结束页码	4859
卷号	30 期号:6
英文摘要	Nanoporosity is a key factor for evaluating shale oil/gas potential and recovery. Organic matter (OM) can be a primary host of nanopores in shale. The Triassic Yanchang Formation in the Ordos Basin is a promising target for shale oil/gas recovery in China. However, the relationship between OM and nanoporosity in the Yanchang shale remains controversial. In this study, 19 Yanchang shale cores were collected and analyzed. A twofold effect of OM on nanoporosity was observed, even though the total pore volume and specific surface area correlated negatively with the OM content. Nanoporosity in samples with total organic carbon (TOC) content of < 7% increased with increasing maturity, while in the other samples, it showed a decreasing trend. This phenomenon is attributed to the two different OM inputs in the studied shale samples. In shale samples with TOC content of < 7%, OM was mainly type II and a new generation of nanopores contributed more to nanoporosity than nanopore occupation by newly generated hydrocarbons with increasing maturity. The situation was opposite in the other shale samples, in which OM was mainly type I. Clay-related pores were an important contributor to nanoporosity. Nanoporosity correlated positively with quartz content but negatively to feldspar content, and these are attributed to pore protection from compaction of quartz and dissolution and conversion of feldspar, respectively. These findings provide a reasonable explanation for the diverse observations of relationships between OM and nanoporosity in the Yanchang shale and enhance the understanding of pore evolution in organic-rich shale.
关键词	TRIASSIC YANCHANG FORMATION CONTINENTAL TRANSITIONAL SHALE SOUTHEASTERN ORDOS BASIN GAS-STORAGE CAPACITY PORE STRUCTURE SICHUAN BASIN FRACTAL CHARACTERISTICS HYDROCARBON GENERATION ADSORPTION CAPACITY METHANE ADSORPTION
英文关键词	Contribution to nanoporosity; Effect of kerogen types; Lacustrine shale; Yanchang shale; Nanopores in shale
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000693924300001
来源期刊	NATURAL RESOURCES RESEARCH
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253819
作者单位	[Li, Jing; Li, Pengpeng; Zhou, Shixin; Meng, Bingkun; Sun, Zexiang] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China; [Li, Jing; Li, Pengpeng; Zhou, Shixin; Meng, Bingkun; Sun, Zexiang] Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China; [Li, Pengpeng; Meng, Bingkun; Sun, Zexiang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Zhang, Xiaodong] Henan Polytech Univ, Sch Energy Sci & Engn, Jiaozuo 454000, Henan, Peoples R China
推荐引用方式 GB/T 7714	Li, Jing,Li, Pengpeng,Zhou, Shixin,et al. Opposite Contributions of Types I and II Organic Matter to Nanoporosity in Lacustrine Shale[J]. 中国科学院西北生态环境资源研究院,2021,30(6).
APA	Li, Jing,Li, Pengpeng,Zhou, Shixin,Meng, Bingkun,Sun, Zexiang,&Zhang, Xiaodong.(2021).Opposite Contributions of Types I and II Organic Matter to Nanoporosity in Lacustrine Shale.NATURAL RESOURCES RESEARCH,30(6).
MLA	Li, Jing,et al."Opposite Contributions of Types I and II Organic Matter to Nanoporosity in Lacustrine Shale".NATURAL RESOURCES RESEARCH 30.6(2021).