Investigation of Pore Structures in Shallow Longmaxi Shale, South China, via Large-Area Electron Imaging and Neutron Scattering Techniques

doi:10.1021/acs.energyfuels.9b04538

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Investigation of Pore Structures in Shallow Longmaxi Shale, South China, via Large-Area Electron Imaging and Neutron Scattering Techniques
	Wang, Y ; Jiang, HQ ; Ke, YB ; Zhang, SK ; Wang, LH ; Wang, YF ; He, CY ; Zhang, LJ ; Wang, JA
刊名	ENERGY & FUELS
	2020
卷号	34 期号:7 页码:7974-7984
关键词	SICHUAN BASIN GAS-STORAGE BIB-SEM MORPHOLOGY MARINE POROSITY SCALE MICROSTRUCTURE MINERALOGY NETWORKS
ISSN号	0887-0624
DOI	10.1021/acs.energyfuels.9b04538
文献子类	期刊论文
英文摘要	Pore structures are significant for evaluating shale gas production since they not only control gas capacity but also affect hydraulic fracturing. In this study, we investigated the pore structures of Longmaxi (LMX) shale samples from a shallow drill core in Guizhou Province, China, with large-area electron imaging and neutron scattering. Pores related to the mineral matrix and organic matter (OM) were identified, and the former had greater impacts on the pore shape and porosity, which would enhance fracturing. Large-area electron imaging analysis (with 15 nm resolution) indicated that the majority of LMX shale porosity was contributed by nanopores with diameters smaller than 400 nm. According to the neutron scattering data, micropores and mesopores dominated the pore size distribution (PSD), and pores within cross sections cut perpendicular to the bedding showed preferential orientation accompanied by larger porosity. The porosity (4.6-5.6%) calculated from neutron scattering data was approximately 2 times larger than that calculated from imaging data, suggesting that nanopores smaller than 15 nm contributed more to the porosity than those larger than 100 nm, as they were more resistant to compaction. This study indicated that pore types were controlled by minerals as well as thermal maturity, while PSDs were affected by tectonic movements. The majority of porosity originated from micropores and mesopores, which confirmed the great potential for shale gas reserves in the LMX shale. This conclusion is helpful for building a shale porosity model and eventually improving the reserve assessment.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/32957]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Appl Phys, Key Lab Interfacial Phys & Technol, Shanghai 201800, Peoples R China 3.Spallat Source Neutron Sci Ctr, Dongguan 523803, Peoples R China 4.Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Wang, Y,Jiang, HQ,Ke, YB,et al. Investigation of Pore Structures in Shallow Longmaxi Shale, South China, via Large-Area Electron Imaging and Neutron Scattering Techniques[J]. ENERGY & FUELS,2020,34(7):7974-7984.
APA	Wang, Y.,Jiang, HQ.,Ke, YB.,Zhang, SK.,Wang, LH.,...&Wang, JA.(2020).Investigation of Pore Structures in Shallow Longmaxi Shale, South China, via Large-Area Electron Imaging and Neutron Scattering Techniques.ENERGY & FUELS,34(7),7974-7984.
MLA	Wang, Y,et al."Investigation of Pore Structures in Shallow Longmaxi Shale, South China, via Large-Area Electron Imaging and Neutron Scattering Techniques".ENERGY & FUELS 34.7(2020):7974-7984.