Multi-tests for pore structure characterization-A case study using lamprophyre

作者：Li, Zhen; Feng, Guorui^*; Luo, Yi; Hu, Shengyong; Qi, Tingye; Jiang, Haina; Guo, Jun; Bai, Jinwen; Du, Xianjie; Kang, Lixun

来源：AIP Advances, 2017, 7(8): 085204.

DOI：10.1063/1.4997749

• GAS-ADSORPTION
• COAL
• BASIN
• INTRUSION
• POROSITY
• SYSTEMS
• CHINA
• AREA
• FLOW

The pore structure plays an important role to understand methane adsorption, storage and flow behavior of geological materials. In this paper, the multi-tests including N-2 adsorption, mercury intrusion porosimetry (MIP) and CT reconstruction have been proposed on Tashan lamprophyre samples. The main findings are listed: (1) The pore size distribution has a broad range ranging from 2-100000nm, among which the adsorption pores (<100nm) occupies the mainly specific surface areas and pore volume while the seepage pores (>100nm) only account for 34% of total pore volume. (2) The lamprophyre open pores are mainly slit-like/plate-like and ink-bottle-shaped pores on a two-dimensional level. The lamprophyre 3D pore structure shows more stochastic and anisotropic extension on the z axis to form a complex pore system on a three-dimensional level. (3) The closed pores (>647nm) occupy averaged 74.86% and 72.75% of total pores (>647nm) volume and specific surface area indicating a poor connectivity pore system. The revealed results provide basic information for understanding the abnormal methane emission reasons in similar geological conditions with lamprophyre invasions.

• 出版日期2017-8
• 单位太原理工大学