FAN Zhangqun1; XIA Zhiyuan2 (1. Xi'an Branch;

• 1: China Coal Research Institute
• 2: Xi'an 710054
• 3: China
• 4: 2. Foshan Huate Gases Co. Ltd

Abstract：

Coal matrix shape factor is an important parameter in studying numerical simulation and diffusion rate, so doing research on shape factor of different shape and size of matrix is meaningful. With assumption that the diffusion time is very long, the time-dependent factor is simplified to constant, so the expressions of factors of plate-like, columnar and spherical coal matrix, are obtained by solving diffusion equation in initial and boundary conditions. At the end, the conclusion is that the values of the three kinds of geometric shape present significant difference.

Key Words： coal matrix; shape factor; coalbed methane; CBM

Abstract:

Keywords:

Foundation: 国家自然科学基金重点项目(50534070);; 国家科技重大专项大型油气田及煤层气开发项目(2008ZX05040-004)

Authors: FAN Zhangqun1; XIA Zhiyuan2 (1. Xi'an Branch;

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