Analysis of the Pore Structure of Shale in Ordos Basin by SEM with Nitrogen Gas Adsorption-Desorption

CHEN Sheng-rong; SHUAI Qin; GAO Qiang; TIAN Ya; XU Sheng-rui; HUANG Yun-jie

doi:10.15898/j.cnki.11-2131/td.2015.06.006

2015 Vol. 34, No. 6

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CHEN Sheng-rong, SHUAI Qin, GAO Qiang, TIAN Ya, XU Sheng-rui, HUANG Yun-jie. Analysis of the Pore Structure of Shale in Ordos Basin by SEM with Nitrogen Gas Adsorption-Desorption[J]. Rock and Mineral Analysis, 2015, 34(6): 636-642. doi: 10.15898/j.cnki.11-2131/td.2015.06.006

Citation:

CHEN Sheng-rong, SHUAI Qin, GAO Qiang, TIAN Ya, XU Sheng-rui, HUANG Yun-jie. Analysis of the Pore Structure of Shale in Ordos Basin by SEM with Nitrogen Gas Adsorption-Desorption[J]. Rock and Mineral Analysis, 2015, 34(6): 636-642. doi: 10.15898/j.cnki.11-2131/td.2015.06.006

Analysis of the Pore Structure of Shale in Ordos Basin by SEM with Nitrogen Gas Adsorption-Desorption

1.
Faculty of Materials Science and Chemistry, China University of Geosciences(Wuhan), Wuhan 430074, China
2.
Oil and Gas Resources Research Center, China Geological Survey, Beijing 100029, China
3.
School of Earth Sciences, China University of Geosciences(Wuhan), Wuhan 430074, China

More Information

Corresponding author: SHUAI Qin, shuaiqin@cug.edu.cn

Received Date: 20 January 2015

Revised Date: 26 October 2015

Accepted Date: 08 November 2015

Publish Date: 25 June 2015

Abstract

Abstract

Identification of porosity in shale is of great significance for exploring mechanism of shale gas. Porosity properties of the shale samples from the Ordos Basin were characterized by multiple techniques including Scanning Electron Microscope(SEM), Mercury Intrusion Porosimetry(MIP), and nitrogen gas adsorption-desorption. Results showed that the shales contained abundant pores that include dissolution pore, microfracture pore, and intergranular pore. The pore sizes range from several to several hundred nanometers. The total surface area ranges from 5.06 to 19.32 m²/g and pore volume has a range of 0.01-0.03 cm³/g. Results indicate that the OrdosBasin Shale develops pores of various types and sizes. The main type of pore is the nano-pore, which is beneficial for the storage of shale gas. Micro-cracks are beneficial for the transportation of shale gas. These results suggest that the basic environment of the Ordos Basin is suitable for the storage of shale gas and that the Ordos Basin may be rich in shale gas.
- shale /
- pore structure /
- Scanning Electron Microscope /
- low pressure nitrogen adsorption /
- mercury porosimetry

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