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	Maturity characterization and formation mechanisms of nano-scale anisotropic pyrobitumen based on atomic force microscopy (AFM)
通讯作者	Cao, Jian([email protected])
	Zuo, Zhaoxi1; Cao, Jian2; Hu, Wenxuan2; Zhang, Ruijie2; Wang, Xiaolin2; Yao, Suping2; Luo, Bing3; Zhang, Jingkun4
	2024-11-01
发表期刊	ORGANIC GEOCHEMISTRY
ISSN	0146-6380
卷号	197页码:15
摘要	Highly evolved pyrobitumen is an important and realistic object for maturity characterization of ancient and deeply buried organic matter, but measurement of its reflectance is challenging due to its strong optical anisotropy and nano-scale relief. Here we conducted a case study in the Sinian (Ediacaran) Dengying Formation of the Sichuan Basin, China. High-resolution, three-dimensional, morphological imaging by atomic force microscopy (AFM), laser Raman (LRM) spectroscopy, and reflectance studies were conducted on the reservoir pyrobitumen. Our results show that Young's modulus and adhesion, which are mechanical maturity parameter, provides effective characterization of maturity. The increase in Young's modulus of pyrobitumen lags that of the vitrinite, given that pyrobitumen is formed by oil cracking and is more hydrogen-rich than vitrinite. A quantitative relationship between Young's modulus, adhesion and reflectance in bright and dark areas of pyrobitumen was established, which can be used for maturity characterization. The changes in Young's modulus of the pyrobitumen is related to the condensation of organic matter and directional arrangement of microcrystals. Young's modulus of organic matter is a robust mechanical maturity index at high organic matter maturity (R-o > 2.0 %), but it is important to pay attention to the influence of anisotropy. Compared to Young's modulus, adhesion is less affected by anisotropy. The nano-mechanics such as Young's modulus and adhesion will be new maturity indicator in addition to conventional optical and spectroscopic method. The nano-mechanical properties of organic matter are expected to be applied to maturity indicators and macerals classification in the field of organic petrology in the further research.
关键词	Huiyuan Xu Executive Guest Editor Pyrobitumen Organic matter maturity Nano-mechanics Raman spectroscopy Dengying Formation Sichuan Basin
DOI	10.1016/j.orggeochem.2024.104879
收录类别	SCI
语种	英语
关键词[WOS]	ORGANIC-MATTER ; SICHUAN BASIN ; THERMAL MATURITY ; SOLID BITUMEN ; NANOMECHANICAL PROPERTIES ; ELASTIC PROPERTIES ; PALEO-UPLIFT ; GAS ; REFLECTANCE ; ORIGIN
资助项目	National Natural Science Foundation of China[42230808]
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:001327502600001
项目资助者	National Natural Science Foundation of China
出版者	PERGAMON-ELSEVIER SCIENCE LTD
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/44396
专题	中国科学院南京地质古生物研究所
通讯作者	Cao, Jian
作者单位	1.SINOPEC, Wuxi Inst Petr Geol, SINOPEC Key Lab Petr Accumulat Mech, PEPRIS, Wuxi 214126, Jiangsu, Peoples R China 2.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210023, Jiangsu, Peoples R China 3.PetroChina Southwest Oil & Gas Field Co, Res Inst Petr Explorat & Dev, Chengdu 610051, Sichuan, Peoples R China 4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Key Lab Palaeobiol & Petr Stratig, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Zuo, Zhaoxi,Cao, Jian,Hu, Wenxuan,et al. Maturity characterization and formation mechanisms of nano-scale anisotropic pyrobitumen based on atomic force microscopy (AFM)[J]. ORGANIC GEOCHEMISTRY,2024,197:15.
APA	Zuo, Zhaoxi.,Cao, Jian.,Hu, Wenxuan.,Zhang, Ruijie.,Wang, Xiaolin.,...&Zhang, Jingkun.(2024).Maturity characterization and formation mechanisms of nano-scale anisotropic pyrobitumen based on atomic force microscopy (AFM).ORGANIC GEOCHEMISTRY,197,15.
MLA	Zuo, Zhaoxi,et al."Maturity characterization and formation mechanisms of nano-scale anisotropic pyrobitumen based on atomic force microscopy (AFM)".ORGANIC GEOCHEMISTRY 197(2024):15.

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