Characterization of organic matter pores in typical marine and terrestrial shales, China

doi:10.1016/j.jngse.2017.11.002

	Characterization of organic matter pores in typical marine and terrestrial shales, China
	Wang, Yu 1,2; Wang, Lihua 1,2; Wang, Jianqiang 1,2; Jiang, Zheng 1,2; Jin, Chan 1,2; Wang, Yanfei 3
刊名	JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
	2018
卷号	49 页码:56-65
关键词	Organic Matter Pores Mineralogy Marine And Terrestrial Shale Burial-diagenesis History
ISSN号	1875-5100
DOI	10.1016/j.jngse.2017.11.002
文献子类	Article
英文摘要	Organic matter (OM) is a significant component in shale and controls gas storage and transportation. Typical marine (JLD sample, NTT sample, WF sample and LMX sample) and terrestrial (C7 sample) OM-rich shale samples from the Sichuan Basin and Erdos Basin in China were investigated using X-ray diffraction and scanning electron microscopy (SEM) to study their mineralogy and OM pore network properties. The X-ray diffraction results indicated that the content of brittle minerals (quartz, plagioclase, calcareous dolomite, dolomite and pyrite) in each shale sample was higher than 60%, providing material in which original matrix pores and microfractures formed during an early stage of diagenesis. The types and contents of clay minerals vary among the shale samples. The main clay mineral in most of the marine shale samples is illite, but the primary clay in the terrestrial shale is an illite-smectite mixed layer. The maturity data of the OM in the marine shale samples suggested a moderate to high stage of maturity, while the terrestrial shale was collected at a relatively low stage of thermal evolution. The SEM observations suggested that the OM was either tight or porous, and the former was the dominant state. The OM pores preserved in the shale consisted of pores within, between and at the interfaces of the OM particles. For the OM pores within the OM particles, the most dominant pore type, type I, exhibits honeycomb-like pores formed by hydrocarbon generation; this type of pore is most developed in the marine LMX shale and NTT shale. Pore type II is related to biogenic residue and is more developed in the JLD shale and LMX shale. Pore type. includes mainly elliptical pores or microcracks related to the volume loss of bitumen. The OM pores between the OM particles are narrow and laminar; these structures were inherited from the previous clay mineral structures. The OM pores at the interfaces of the OM particles and the mineral grains are usually observed as microfractures and are more developed in the C7 shale. The lack of pores within the OM in the terrestrial C7 shale was due to low maturity. A combination of SEM results, mineral compositions and carbon analyses indicated a positive correlation between the development of OM pores and the organic carbon content, as well as the thermal maturity. With increasing burial and maturity, migrated OM was squeezed into mineral matrix pores and appears to be continuous, especially along the bedding planes, forming an effective network due to the interconnectivity of the OM.
WOS关键词	SICHUAN BASIN ; GAS SHALES ; NETWORKS ; POROSITY ; PERMEABILITY ; CHALLENGES ; RESERVOIRS ; MUDROCKS ; MATRIX ; TEXAS
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000418516900006
资助机构	Chinese Academy of Sciences(XDB1002010) ; Chinese Academy of Sciences(XDB1002010) ; Fundamental Research of Shanghai Committee of Science and Technology(12JC1410400) ; Fundamental Research of Shanghai Committee of Science and Technology(12JC1410400) ; National Natural Science Foundation of China(41325016) ; National Natural Science Foundation of China(41325016) ; Chinese Academy of Sciences(XDB1002010) ; Chinese Academy of Sciences(XDB1002010) ; Fundamental Research of Shanghai Committee of Science and Technology(12JC1410400) ; Fundamental Research of Shanghai Committee of Science and Technology(12JC1410400) ; National Natural Science Foundation of China(41325016) ; National Natural Science Foundation of China(41325016) ; Chinese Academy of Sciences(XDB1002010) ; Chinese Academy of Sciences(XDB1002010) ; Fundamental Research of Shanghai Committee of Science and Technology(12JC1410400) ; Fundamental Research of Shanghai Committee of Science and Technology(12JC1410400) ; National Natural Science Foundation of China(41325016) ; National Natural Science Foundation of China(41325016) ; Chinese Academy of Sciences(XDB1002010) ; Chinese Academy of Sciences(XDB1002010) ; Fundamental Research of Shanghai Committee of Science and Technology(12JC1410400) ; Fundamental Research of Shanghai Committee of Science and Technology(12JC1410400) ; National Natural Science Foundation of China(41325016) ; National Natural Science Foundation of China(41325016)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82238]
专题	中国科学院地质与地球物理研究所
通讯作者	Wang, Lihua
作者单位	1.Chinese Acad Sci, Shanghai Inst Appl Phys, Key Lab Interfacial Phys & Technol, Shanghai 201800, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yu,Wang, Lihua,Wang, Jianqiang,et al. Characterization of organic matter pores in typical marine and terrestrial shales, China[J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,2018,49:56-65.
APA	Wang, Yu,Wang, Lihua,Wang, Jianqiang,Jiang, Zheng,Jin, Chan,&Wang, Yanfei.(2018).Characterization of organic matter pores in typical marine and terrestrial shales, China.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,49,56-65.
MLA	Wang, Yu,et al."Characterization of organic matter pores in typical marine and terrestrial shales, China".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 49(2018):56-65.