IMECH-IR  > 流固耦合系统力学重点实验室
A comparative study of the nanopore structure characteristics of coals and Longmaxi shales in China
Zhou SW1,2; Liu HL1,2; Chen H1,2; Wang HY1,2; Guo W1,2; Liu DX1,2; Zhang Q1,2; Wu J1,2; Shen WJ (沈伟军)3
Source PublicationENERGY SCIENCE & ENGINEERING
2019-09-05
Pages14
ISSN2050-0505
Abstract

Both of the coalbed methane (CBM) and shale gas reservoirs are dominated by nanometer-scale pores with their nanopore structures controlling the occurrence, enrichment, and accumulation of natural gas. Low-pressure nitrogen gas adsorption (LP-N(2)GA), low-pressure carbon dioxide gas adsorption (LP-CO(2)GA), high-pressure methane adsorption (HPMA), and field emission scanning electron microscope (FE-SEM) experiments were conducted on 14 different-rank coal samples and nine Longmaxi shale samples collected from various basins in China to compare their nanopore characteristics. The FE-SEM results indicate that the pore structures of both the coal and shale samples consist of nanometer-sized pores that primarily developed in the organic matter. The types of their isothermal adsorption curves are similar. However, the coal and shale samples possess various hysteresis loops, which suggest that the nanopores in shale are open-plated, whereas those in coal are semi-open. Furthermore, the specific surface area (SSA) and pore volume (PV) of the micropores in coal are much larger than those of the mesopores, with the micropore SSAs accounting for 99% of the total SSA in the coal samples. However, the micropore SSAs in the shale samples only account 42.24% of the total SSA. These different nanopore structures reflect their different methane adsorption mechanisms. The methane adsorption of coal is primarily controlled by the micropore SSA, whereas that of shale is primarily controlled by the mesopore SSA. If we use mesopore SSA to analyze its impact on methane adsorption capacity of coal and shale, it will be mismatched. However, no mismatching relationship exists between the total SSAs and adsorption capacities of coal and shale. This study highlights the controlling effect of total SSA on methane adsorption capacity.

Keywordadsorption capacity CBM nanopore structure SEM shale gas specific surface area
DOI10.1002/ese3.458
Indexed BySCI ; EI
Language英语
WOS IDWOS:000485051500001
WOS KeywordPORE STRUCTURE CHARACTERIZATION ; NUCLEAR-MAGNETIC-RESONANCE ; CH4 ADSORPTION CAPACITY ; GAS-ADSORPTION ; RANK COALS ; SIZE DISTRIBUTIONS ; METHANE ADSORPTION ; FRACTURE NETWORKS ; MERCURY INTRUSION ; N-2 ADSORPTION
WOS Research AreaEnergy & Fuels
WOS SubjectEnergy & Fuels
Funding ProjectNational Science and Technology Major Project[2017ZX05035002-002]
DepartmentLMFS海洋土力学(LHO)
ClassificationQ3
Ranking5+
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/79408
Collection流固耦合系统力学重点实验室
Corresponding AuthorLiu HL
Affiliation1.PetroChina Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
2.Natl Energy Shale Gas R&D Expt Ctr, Langfang, Peoples R China
3.Chinese Acad Sci, Inst Mech, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Zhou SW,Liu HL,Chen H,et al. A comparative study of the nanopore structure characteristics of coals and Longmaxi shales in China[J]. ENERGY SCIENCE & ENGINEERING,2019:14.
APA Zhou SW.,Liu HL.,Chen H.,Wang HY.,Guo W.,...&Shen WJ .(2019).A comparative study of the nanopore structure characteristics of coals and Longmaxi shales in China.ENERGY SCIENCE & ENGINEERING,14.
MLA Zhou SW,et al."A comparative study of the nanopore structure characteristics of coals and Longmaxi shales in China".ENERGY SCIENCE & ENGINEERING (2019):14.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhou SW]'s Articles
[Liu HL]'s Articles
[Chen H]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhou SW]'s Articles
[Liu HL]'s Articles
[Chen H]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhou SW]'s Articles
[Liu HL]'s Articles
[Chen H]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.