Contrast Study on Porosity and Permeability of Tectonically Deformed Coal and Indigenous Coal in Pingdingshan Mining Area, China
-
摘要: 为了研究构造煤孔渗变化特性, 利用平顶山矿区原生结构煤和构造煤, 进行了不同围压、温度、湿度和煤体结构类型等条件下孔隙度及渗透率的实验测定, 对煤层孔渗特性在不同条件下的变化趋势进行了分析.结果表明: 围压、温度、湿度和煤体结构类型4种因素对煤的孔隙度和渗透率均有较大影响, 当温度和围压同时作用时, 围压的作用效果大于温度的作用效果.并用Origin软件对部分实验数据进行了数据拟合, 得出原生结构煤和构造煤的渗透率-孔隙度函数关系.Abstract: Taking the simulation of indigenous coal and tectonically deformed coal in Pingdingshan coal district as the research object, porosity and permeability of different coal samples under different factors are determined in this paper. The variation trend of porosity and permeability under different factors is analyzed. The experimental results show that four factors analyzed have significant impact on both porosity and permeability of coal. The effect of confining pressure is greater than temperature when confining pressure and temperature work together. And part of experiment data are fitted by the Origin software, concluding with the function relationship of porosity and permeability of coal.
-
Key words:
- porosity /
- permeability /
- confining pressure /
- temperature /
- moisture /
- tectonically deformed coal
-
图 1 煤孔隙度随围压变化曲线
a.原生结构煤；b.构造煤
Fig. 1. Variation curves of porosity under different temperatures and confining pressure
图 2 不同湿度原生结构煤孔隙度随围压变化曲线
Fig. 2. Variation curves of porosity of dried sample and common sample
图 3 粗细粒构造煤孔隙度随围压变化曲线
Fig. 3. Variation curves of porosity of coarse samples and fine samples
图 4 不同条件下原生结构煤和构造煤渗透率变化曲线
a.恒围压条件下原生结构煤渗透率变化曲线；b.恒围压条件下构造煤渗透率变化曲线；c.恒温度条件下原生结构煤渗透率变化曲线；d.恒温度条件下构造煤渗透率变化曲线
Fig. 4. Variation curves of permeability under different conditions
图 5 不同湿度原生结构煤渗透率变化曲线
a.恒定围压条件下；b.恒定温度条件下
Fig. 5. Variation curves of permeability of dried samples and common samples
图 6 粗细粒构造煤渗透率变化曲线
a.恒定围压条件下；b.恒定温度条件下
Fig. 6. Variation curves of permeability of coarse samples and fine samples
表 1 原生结构煤和构造煤煤岩显微组分测定结果
Table 1. Determination of coal maceral
式样名称 镜质组(%) 惰质组(%) 壳质组(%) 矿物(%) 煤级 原生结构煤 61.7 23.5 13.5 1.3 肥煤 61.5 25.5 11.8 1.2 肥煤 构造煤 56.8 24.2 13.4 5.6 肥煤 55.9 23.3 14.9 4.3 肥煤 
下载: 导出CSV
表 2 煤孔隙度测试实验条件
Table 2. Experimental scheme of coal porosity
原生结构煤 构造煤 温度(℃) 围压(MPa) 普通 干燥 细粒 粗粒 K1 K2 K3 K4 25 2~10 K5 K6 K7 K8 45 2~10 K9 K10 60 2~10 注：K1~K10为样品号.
下载: 导出CSV
表 3 煤渗透率测试实验条件
Table 3. Experimental scheme of coal permeability
原生结构煤 构造煤 温度(℃) 围压(MPa) 普通 干燥 细粒 粗粒 S1 S2 S3 S4 25~55 2 S5 S6 S7 S8 25~55 6 S9 S10 25 2~10 S11 S12 S13 S14 25~55 10 S15 S16 S17 S18 40 2~10 S19 S20 55 2~10 注：S1~S20为样品号.
下载: 导出CSV
表 4 不同温度下煤孔隙度与围压函数关系
Table 4. Functions between porosity and confining pressure
温度(℃) 原生结构煤 构造煤 拟合关系φ(%) 相关系数R2 拟合关系φ(%) 相关系数R2 25 5.2597P-0.1421 0.9949 12.611P-0.2335 0.9923 45 4.4449P-0.2729 0.9989 25.178P-0.2711 0.9365 60 4.8410P-0.1908 0.9359 32.484P-0.1748 0.9831
下载: 导出CSV
表 5 恒围压条件下煤渗透率与温度函数关系
Table 5. Functions between permeability and temperature
围压(MPa) 原生结构煤 构造煤 拟合关系K (10-9m2) 相关系数R2 拟合关系K (10-9m2) 相关系数R2 2 K=0.014+ 0.104e-0.113T 0.9984 K=0.146+ 1.24e-0.097T 0.9927 6 K= 0.003e-0.057T 0.9652 K=0.091- 0.006e0.042T 0.9606 10 K=8× 10-4e-0.046T 0.9921 K=0.048- 0.009e0.025T 0.9355
下载: 导出CSV
表 6 恒温度条件下煤渗透率与围压函数关系
Table 6. Functions between permeability and confining pressure
温度(℃) 原生结构煤 构造煤 拟合关系K (10-9m2) 相关系数R2 拟合关系K (10-9m2) 相关系数R2 25 K=0.001+ 0.08e-0.528P 0.9983 K=-0.002+ 0.4e-0.378P 0.9994 40 K= 0.059e-1.068P 0.9987 K=-0.011+ 0.17e-0.27P 0.9967 55 K= 0.061e-0.471P 0.9996 K=0.054+ 0.79e-0.481P 0.9969
下载: 导出CSV
表 7 煤的渗透率与孔隙度的函数关系
Table 7. Functions between permeability and porosity
温度(℃) 原生结构煤 构造煤 拟合关系K (10-2m2) 相关系数R2 拟合关系K (10-2m2) 相关系数R2 25 3×10-10φ11.86 0.9923 6×10-8φ6.33 0.9856 40 5×10-16φ19.36 0.9996 8×10-8φ5.89 0.9570 55 4×10-9φ10.07 0.9872 2×10-6φ5.07 0.9987
下载: 导出CSV
-
Arenas, E., Chejne, F., 2004. The Effect of the Activating Agent and Temperature on the Porosity Development of Physically Activated Coal Chars. Carbon, 42(12-13): 2451-2455. doi: 10.1016/j.carbon.2004.04.041 Baghbanan, A., Jing, L., 2008. Stress Effects on Permeability in a Fractured Rock Mass with Correlated Fracture Length and Aperture. International Journal of Rock Mechanics and Mining Sciences, 45(8): 1320-1334. doi: 10.1016/j.ijrmms.2008.01015 Dana, E., Skoczylas, F., 1999. Gas Relative Permeability and Pore Structure of Sandstones. International Journal of Rock Mechanics and Mining Sciences, 36(5): 613-625. doi: 10.1016/S0148-9062(99)00037-6 Díaz Aguado, M.B., González Nicieza, C., 2007. Control and Prevention of Gas Outbursts in Coal Mines, Riosa-Olloniego Coalfield, Spain. International Journal of Coal Geology, 69(4): 253-266. doi: 10.1016/j.coal.2006.05.004 Feng, Z.J., Wan, Z.J., Zhao, Y.S., et al., 2010. Experimental Study of Permeability of Anthracite and Gas Coal Masses under High Temperature and Triaxial Stress. Chinese Journal of Rock Mechanics and Engineering, 29(4): 689-696 (in Chinese with English abstract). http://d.wanfangdata.com.cn/periodical/yslxygcxb201004005 Fu, X.H., Li, D.H., Qin, Y., et al., 2002. Experimental Research of Influence of Coal Matrix Shrinkage on Permeability. Journal of China University of Mining & Technology, 31(2): 129-131, 137 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-ZGKD200202004.htm Ghabezloo, S., Sulem, J., Guédon, S., et al., 2009. Effective Stress Law for the Permeability of a Limestone. International Journal of Rock Mechanics and Mining Sciences, 46(2): 297-306. doi: 10.1016/j.ijrmms.2008.05.006 Guo, D.Y., Han, D.X., Feng, Z.L., 1998. Experimental Study on the Porosity and Permeability of Disturbed Coal under Confined Pressure. Coal Geology & Exploration, 26(4): 31-34 (in Chinese with English abstract). http://d.wanfangdata.com.cn/periodical/QK199800863669 Guo, D.Y., Song, G.T., Ku, M.X., 2002. Research on Coal Structure Indices to Coal and Gas Outbursts in Pingdingshan Mine Area, China. Journal of Coal Science & Engineering (China), 8(1): 1-6. http://qikan.cqvip.com/Qikan/Article/Detail?id=8588204 He, Y.L., Yang, L.Z., 2005. Mechanism of Effects of Temperature and Effective Stress on Permeability of Sandstone. Chinese Journal of Rock Mechanics and Engineering, 24(14): 2420-2427 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-YSLX200514004.htm Hu, X., Liang, W., Hou, S.J., et al., 2012. Experimental Study of Effect of Temperature and Stress on Permeability Characteristics of Raw Coal and Shaped Coal. Chinese Journal of Rock Mechanics and Engineering, 31(6): 1222-1229 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-YSLX201206019.htm Hu, Y.Q., Zhao, Y.S., Yang, D., et al., 2010. Experimental Study of Effect of Temperature on Permeability Characteristics of Lignite. Chinese Journal of Rock Mechanics and Engineering, 29(8): 1585-1590 (in Chinese with English abstract). http://d.wanfangdata.com.cn/periodical/yslxygcxb201008010 Huang, Y.Z., Wang, E.Z., 2007. Experimental Study on Coefficient of Sensitiveness between Percolation Rate and Effective Pressure for Low Permeability Rock. Chinese Journal of Rock Mechanics and Engineering, 26(2): 410-414 (in Chinese with English abstract). http://d.wanfangdata.com.cn/periodical/yslxygcxb200702025 Jasinge, D., Ranjith, P.G., Choi, S.K., 2011. Effects of Effective Stress Changes on Permeability of Latrobe Valley Brown Coal. Fuel, 90(3): 1292-1300. doi: 10.1016/j.fuel.2010.10.053 Konecny, P., Kozusnikova, A., 2011. Influence of Stress on the Permeability of Coal and Sedimentary Rocks of the Upper Silesian Basin. International Journal of Rock Mechanics and Mining Sciences, 48(2): 347-352. doi: 10.1016/j.jirmms.2010.11.017. Li, Z.Q., Xian, X.F., Long, Q.M., 2009. Experiment Study of Coal Permeability under Different Temperature and Stress. Journal of China University of Mining & Technology, 38(4): 523-527 (in Chinese with English abstract). http://www.researchgate.net/publication/279908140_Experiment_study_of_coal_permeability_under_different_temperature_and_stress Liu, X.J., Gao, H., Liang, L.X., 2011. Study of Temperature and Confining Pressure Effects on Porosity and Permeability in Low Permeability Sandstone. Chinese Journal of Rock Mechanics and Engineering, 30(Suppl. 2): 3771-3778 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTotal-YSLX2011S2053.htm Peng, S.P., Meng, Z.P., Wang, H., et al., 2003. Testing Study on Pore Ratio and Permeability of Sandstone under Different Confining Pressures. Chinese Journal of Rock Mechanics and Engineering, 22(5): 742-746 (in Chinese with English abstract). http://www.researchgate.net/publication/285735297_Testing_study_on_pore_ratio_and_permeability_of_sandstone_under_different_confining_pressures Sulem, J., Ouffroukh, H., 2006. Shear Banding in Drained and Undrained Triaxial Tests on a Saturated Sandstone: Porosity and Permeability Evolution. International Journal of Rock Mechanics and Mining Sciences, 43(2): 292-310. doi: 10.1016/j.ijrmms.2005.07.001 Wang, R.F., Chen, M.Q., 2008. Characteristics and Influencing Factors of Movable Fluid in Ultra-Low Permeability Sandstone Reservoir. Acta Petrolei Sinica, 29(4): 558-561, 566 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-SYXB200804016.htm Xu, J., Zhang, D.D., Peng, S.J., et al., 2011. Experimental Research on Impact of Temperature on Seepage Characteristics of Coal Containing Methane under Triaxial Stress. Chinese Journal of Rock Mechanics and Engineering, 30(9): 1848-1854 (in Chinese with English abstract). http://www.cqvip.com/main/zcps.aspx?c=1&id=39311738 Xu, J.Y., Peng, D.J., Luo, Z.T., 1995. Significant Effect of Confining Pressure on Structural Fracture Porosities. Acta Petrolei Sinica, 16(3): 44-47 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-SYXB503.006.htm Yuan, C.F., 1985. Tectonically Deformed Coal and Coal Gas Outburst. Coal Science and Technology, 1(1): 53-60 (in Chinese). 冯子军, 万志军, 赵阳升, 等, 2010. 高温三轴应力下无烟煤、气煤煤体渗透特性的试验研究. 岩石力学与工程学报, 29(4): 689-696. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201004008.htm 傅雪海, 李大华, 秦勇, 等, 2002. 煤基质收缩对渗透率影响的实验研究. 中国矿业大学学报, 31(2): 129-131, 137. doi: 10.3321/j.issn:1000-1964.2002.02.005 郭德勇, 韩德馨, 冯志亮, 1998. 围压下构造煤的孔隙度和渗透率特征实验研究. 煤田地质与勘探, 26(4): 31-34. https://www.cnki.com.cn/Article/CJFDTOTAL-MDKT804.007.htm 贺玉龙, 杨立中, 2005. 温度和有效应力对砂岩渗透率的影响机理研究. 岩石力学与工程学报, 24(14): 2420-2427. doi: 10.3321/j.issn:1000-6915.2005.14.004 胡雄, 梁为, 侯厶靖, 等, 2012. 温度与应力对原煤、型煤渗透特性影响的试验研究. 岩石力学与工程学报, 31(6): 1222-1229. doi: 10.3969/j.issn.1000-6915.2012.06.018 胡耀青, 赵阳升, 杨栋, 等, 2010. 温度对褐煤渗透特性影响的试验研究. 岩石力学与工程学报, 29(8): 1585-1590. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201008012.htm 黄远智, 王恩志, 2007. 低渗透岩石渗透率对有效应力敏感系数的试验研究. 岩石力学与工程学报, 26(2): 410-414. doi: 10.3321/j.issn:1000-6915.2007.02.025 李志强, 鲜学福, 隆晴明, 2009. 不同温度应力条件下煤体渗透率实验研究. 中国矿业大学学报, 38(4): 523-527. doi: 10.3321/j.issn:1000-1964.2009.04.012 刘向君, 高涵, 梁利喜, 2011. 温度围压对低渗透砂岩孔隙度和渗透率的影响研究. 岩石力学与工程学报, 30(增刊2): 3771-3778. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2011S2053.htm 彭苏萍, 孟召平, 王虎, 等, 2003. 不同围压下砂岩孔渗规律试验研究. 岩石力学与工程学报, 22(5): 742-746. doi: 10.3321/j.issn:1000-6915.2003.05.010 王瑞飞, 陈明强, 2008. 特低渗透砂岩储层可动流体赋存特征及影响因素. 石油学报, 29(4): 558-561, 566. doi: 10.3321/j.issn:0253-2697.2008.04.015 许江, 张丹丹, 彭守建, 等, 2011. 三轴应力条件下温度对原煤渗流特性影响的实验研究. 岩石力学与工程学报, 30(9): 1848-1854. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201109015.htm 许浚远, 彭大钧, 罗蛰潭, 1995. 围压对构造裂缝孔隙度的重要影响. 石油学报, 16(3): 44-47. doi: 10.3321/j.issn:0253-2697.1995.03.017 袁崇孚, 1985. 构造煤和煤与瓦斯突出. 煤炭科学技术, 1(1): 53-60. https://www.cnki.com.cn/Article/CJFDTOTAL-MTKJ198601011.htm -
点击查看大图
计量
- 文章访问数: 3492
- HTML全文浏览量: 539
- PDF下载量: 636
- 被引次数: 0
