Quantitative Analysis of Nanopore Structural Characteristics of Lower Paleozoic Shale, Chongqing (Southwestern China): Combining FIB-SEM and NMR Cryoporometry

doi:10.1021/acs.energyfuels.7b02391

	Quantitative Analysis of Nanopore Structural Characteristics of Lower Paleozoic Shale, Chongqing (Southwestern China): Combining FIB-SEM and NMR Cryoporometry
	Tong, Shaoqing 1,2,3; Dong, Yanhui 1,2,3,4,5; Zhang, Qian 1,2,3; Elsworth, Derek 4,5; Liu, Shimin 4,5
刊名	ENERGY & FUELS
	2017-12-01
卷号	31 期号:12 页码:13317-13328
ISSN号	0887-0624
DOI	10.1021/acs.energyfuels.7b02391
文献子类	Article
英文摘要	Characterizing nanopore structure is one of the most important factors in understanding gas storage and transport in shale reservoirs, but remains a significant challenge. In this work, we combine the benefits of Focused Ion Beam Scanning Electron Microscopy (FIB-SEM) and Nuclear Magnetic Resonance Cryoporometry (NMR-C) to characterize the nanopore structure of lower Paleozoic shales from Chongqing, southwestern China. Mineral composition is qualified through X-ray Energy Dispersive Spectroscopy (EDS) and Field-Emission Scanning Electron Microscopy (FE-SEM). Voids in 2D micrographs are classified into types of meso- and/or microfractures, inter particle pores (InterP pores), intraparticle pores (IntraP pores), and pores in organic matter (OM pores). An Otsu thresholding algorithm and an edge detection algorithm (in Avizo) are used to segment OM, InterP, and IntraP pores and to establish 3D pore structure for pore-network modeling (PNM). The pore size distribution (PSD) is measured via PNM and compared to the PSD recovered from NMR-C. Results indicate that the small OM pores have favorable potential for storing adsorbed gas because of their apparent interconnectivity and higher porosity; conversely, InterP and IntraP pores are mostly isolated and with low porosity. The peaks of the PSD, recovered from PNM, are in the ranges 10-20 nm and 60-120 nm and are in good agreement with the peaks of the PSD recovered from NMR-C. This suggests that the NMR signals in these discontinuous ranges are due to OM, InterP, and IntraP pores. This indirectly demonstrates that the probe liquid in the NMR-C experiments (i.e., water) may indeed enter the nanoscale pores in the shale during centrifugal saturation. Comparison of the PSD from PNM and NMR-C also shows that NMR-C has a higher sensitivity and accuracy in detecting nanopores. Combining FIB-SEM and NMR-C is a promising technique in detecting and characterizing the nanoporosity of shales.
WOS关键词	PORE STRUCTURE CHARACTERIZATION ; MISSISSIPPIAN BARNETT SHALE ; SICHUAN BASIN ; GAS-ADSORPTION ; JIULAODONG FORMATION ; TRANSPORT ; LONGMAXI ; POROSITY ; PERMEABILITY ; SIMULATION
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000418783800023
资助机构	Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030601) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030601) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030601) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030601) ; Youth Innovation Promotion Association, CAS(2016063) ; Youth Innovation Promotion Association, CAS(2016063) ; Youth Innovation Promotion Association, CAS(2016063) ; Youth Innovation Promotion Association, CAS(2016063) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030601) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030601) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030601) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030601) ; Youth Innovation Promotion Association, CAS(2016063) ; Youth Innovation Promotion Association, CAS(2016063) ; Youth Innovation Promotion Association, CAS(2016063) ; Youth Innovation Promotion Association, CAS(2016063) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030601) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030601) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030601) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030601) ; Youth Innovation Promotion Association, CAS(2016063) ; Youth Innovation Promotion Association, CAS(2016063) ; Youth Innovation Promotion Association, CAS(2016063) ; Youth Innovation Promotion Association, CAS(2016063) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030601) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030601) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030601) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030601) ; Youth Innovation Promotion Association, CAS(2016063) ; Youth Innovation Promotion Association, CAS(2016063) ; Youth Innovation Promotion Association, CAS(2016063) ; Youth Innovation Promotion Association, CAS(2016063)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82406]
专题	中国科学院地质与地球物理研究所
通讯作者	Dong, Yanhui
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 4.Penn State Univ, Dept Energy & Mineral Engn, Ctr G3, University Pk, PA 16802 USA 5.Penn State Univ, EMS Energy Inst, University Pk, PA 16802 USA
推荐引用方式 GB/T 7714	Tong, Shaoqing,Dong, Yanhui,Zhang, Qian,et al. Quantitative Analysis of Nanopore Structural Characteristics of Lower Paleozoic Shale, Chongqing (Southwestern China): Combining FIB-SEM and NMR Cryoporometry[J]. ENERGY & FUELS,2017,31(12):13317-13328.
APA	Tong, Shaoqing,Dong, Yanhui,Zhang, Qian,Elsworth, Derek,&Liu, Shimin.(2017).Quantitative Analysis of Nanopore Structural Characteristics of Lower Paleozoic Shale, Chongqing (Southwestern China): Combining FIB-SEM and NMR Cryoporometry.ENERGY & FUELS,31(12),13317-13328.
MLA	Tong, Shaoqing,et al."Quantitative Analysis of Nanopore Structural Characteristics of Lower Paleozoic Shale, Chongqing (Southwestern China): Combining FIB-SEM and NMR Cryoporometry".ENERGY & FUELS 31.12(2017):13317-13328.