4 Yao Y B, Liu D M, Tang D Z, et al. Fractal characterization of adsorption-pores of coals from North China: An investigation on CH4 adsorption capacity of coals. Int J Coal Geol, 2008, 73: 27—42
[5]
5 Yao Y B, Liu D M, Tang D Z, et al. Fractal characterization of seepage-pores of coals from China: An investigation on permeability of coals. Comput Geosci, 2009, 35: 1159—1166
[6]
6 Suuberg E M, Deevi S C, Yun Y. Elastic behaviour of coals studied by mercury porosimetry. Fuel, 1995, 74: 1522—1530
[7]
7 Gane P A C, Ridgway C J, Lehtinen E, et al. Comparison of NMR cryoporometry, mercury intrusion porosimetry, and DSC thermoporosimetry in characterizing pore size distributions of compressed finely ground calcium carbonate structures. Ind Eng Chem Res, 2004, 43: 7920—7927
[8]
8 Yao Y B, Liu D M, Che Y, et al. Petrophysical characterization of coals by low-field nuclear magnetic resonance (NMR). Fuel, 2009, 89: 1371—1380
[9]
9 Yao Y B, Liu D M, Che Y, et al. Non-destructive characterization of coal samples from China using microfocus X-ray computed tomography. Int J Coal Geol, 2009, 80: 113—123
[10]
10 Coates G R, Xiao L Z, Prammer M G. NMR Logging Principles and Applications. Houston (Texas): Gulf Publishing Company, 1999. 1—76
[11]
11 Kevin M, Douglas M, Smith A. NMR technique for the analysis of pore structure: Numerical inversion of relaxation measurements. J Colloid Interface Sci, 1987, 19: 117—126
[12]
12 Hodgkins M A, Howard J J. Application of NMR logging to reservoir characterization of low-resistivity sands in the gulf of Mexico. AAPG Bull, 1999, 83: 114—127
15 Kenyon W E. Nuclear magnetic resonance as a petrophysical measurement. Nucl Geophys, 1992, 6: 153—171
[16]
16 Karacan C ？, Okandan E. Fracture/cleat analysis of coals from Zonguldak Basin (northwestern Turkey) relative to the potential of coalbed methane production. Int J Coal Geol, 2000, 44: 109—125
[17]
17 Van Geet M, Swennen R. Quantitative 3D-fracture analysis by means of microfocus X-ray computer tomography (μCT): An example from coal. Geophys Res Lett, 2001, 28: 3333—3336
[18]
18 Mazumder S, Wol K H A A, Elewaut K, et al. Application of X-ray computed tomography for analyzing cleat spacing and cleat aperture in coal samples. Int J Coal Geol, 2006, 68: 205—222
[19]
19 Yakov V. A practical approach to obtain primary drainage capillary pressure curves from NMR core and log data. Petrophysics, 2001, 42: 334—343
