Back
 GEP  Vol.6 No.5 , May 2018
Experimental Study on Seismic Attenuation and Permeability of Large Porosity Rock
Abstract:
The large porosity areas widely present in the underground resulting from natural hazards or artificial damages. The porosity and permeability are suggested to be capable of estimating the mechanical and air flow conditions inside the porous layer in the underground. To accurately measure the porosity and permeability in the porous area is imperative. To address this issue, we experimentally modeled some porous samples in large porosities by using sandstone particles sieved to different sizes. Ultrasonic was employed to apply on the porous sandstone samples to characterize the seismic velocity and attenuation. Permeability was also measured simultaneously to find a correlation with the porosity. The results showed the seismic attenuation decrease as the reduction of frequency and increasing particle size at the same porosity. Seismic attenuation was strongly correlated to porosity and particle size. Velocity showed a good relationship with the porosity change. Permeability was highly dependent on the particle size especially in the higher porosity range. The results indicated that it is possible to find a relationship between the permeability and seismic attenuation via the porosity and particle size.
Cite this paper: Yang, X. , Sasaki, K. , Zhang, X. and Sugai, Y. (2018) Experimental Study on Seismic Attenuation and Permeability of Large Porosity Rock. Journal of Geoscience and Environment Protection, 6, 80-90. doi: 10.4236/gep.2018.65007.
References

[1]   United States Congress Office of Technology Assessment (1981) An Assessment of Development and Production Potential of Federal Coal Leases. Congress of the U.S., Office of Technology Assessment, Washington DC.

[2]   EIA, US (2011) International Energy Statistics. https://www.eia.gov/cfapps/ipdbproject/IEDIndex3.cfm?tid=1

[3]   Yasitli, B. (2005) 3-D Numerical Modelling of Stresses around a Longwall Panel with Top Coal Caving. Journal of the Southern African Institute of Mining and Metallurgy, 105, 287-300. https://doi.org/10.1016/j.ijrmms.2004.08.007

[4]   Karacan, C.?. (2010) Prediction of Porosity and Permeability of Caved Zone in Longwall Gobs. Transport in Porous Media, 82, 413-439. https://doi.org/10.1007/s11242-009-9437-7

[5]   Gray, I. (1987) Reservoir Engineering in Coal Seams: Part 1—The Physical Process of Gas Storage and Movement in Coal Seams. SPE Reservoir Engineering, 2, 28-34. https://doi.org/10.2118/12514-pa

[6]   Bear, J. (2013) Dynamics of Fluids in Porous Media. Courier Corporation, Chelmsford. https://doi.org/10.1097/00010694-197508000-00022

[7]   Gochioco, L.M. (2000) High-Resolution 3-D Seismic Survey over a Coal Mine Reserve Area in the US—A Case Study. Geophysics, 65, 712-718. https://doi.org/10.1190/1.1444770

[8]   Chen, T., Wang, X. and Mukerji, T. (2015) In Situ Identification of High Vertical Stress Areas in an Underground Coal Mine Panel Using Seismic Refraction Tomography. International Journal of Coal Geology, 149, 55-66. https://doi.org/10.1016/j.coal.2015.07.007

[9]   Cao, A., Dou, L., Cai, W., Gong, S., Liu, S. and Jing, G. (2015) Case Study of Seismic Hazard Assessment in Underground Coal Mining Using Passive Tomography. International Journal of Rock Mechanics and Mining Sciences, 78, 1-9. https://doi.org/10.1016/j.ijrmms.2015.05.001

[10]   Si, G., Durucan, S., Jamnikar, S., Lazar, J., Abraham, K., Korre, A., Shi, J.-Q., Zav?ek, S., Mutke, G. and Lurka, A. (2015) Seismic Monitoring and Analysis of Excessive Gas Emissions in Heterogeneous Coal Seams. International Journal of Coal Geology, 149, 41-54. https://doi.org/10.1016/j.coal.2015.06.016

[11]   Ge, M., Wang, H., Hardy, H. and Ramani, R. (2008) Void Detection at an Anthracite Mine Using an In-Seam Seismic Method. International Journal of Coal Geology, 73, 201-212. https://doi.org/10.1016/j.coal.2007.05.004

[12]   Fimagalli E. ,et al. (1969)Test on Cohesionless Material for Rockfill Dams Journal of the Soil Mechanics and Foundations Division 95, 313-330.

[13]   Hardin, B.O. (1985) Crushing of Soil Particles. Journal of Geotechnical Engineering, 111, 1177-1192. https://doi.org/10.1061/(asce)0733-9410(1985)111:10(1177)

[14]   Palchik, V. (2002) Influence of Physical Characteristics of Weak Rock Mass on Height of Caved Zone over Abandoned Subsurface Coal Mines. Environmental Geology, 42, 92-101. https://doi.org/10.1007/s00254-002-0542-y

[15]   Raymer, L., Hunt, E. and Gardner, J.S. (1980) An Improved Sonic Transit Time-to-Porosity Transform. Proceedings of Society of Petrophysicists and Well-Log Analysts, Houston, 1-13.

 
 
Top