超临界CO2作用下煤体渗透性与孔隙压力–有效体积应力–温度耦合规律试验研究

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Abstract According to the difficult problems of the generally low permeability in Chinas high gas seam and low gas extraction efficiency，using the characteristic of supercritical CO2 which could improve the permeability of porous media，research the flow rule of supercritical CO2 after injected into the low permeability coal seam sample by designing the conditions orthogonally with different temperature，pore pressure，axial compression and confining pressure. The results show that：the permeability and the permeability coefficient of the coal sample trend to be a negative exponential declining rule with the effective volume stress after the action of supercritical CO2；the permeability coefficient and pore pressure trend to be a positive exponential increasing rule；the permeability and the permeability coefficient both trend to be a negative exponential declining rule with the temperatures increasing；under the action of effective volume stress，temperature and pore pressure，the permeability coefficient satisfies the relation：，the supercritical CO2 pore pressure plays a leading rule in improving the coal samples permeability when the effective volume stress is a unchanged；the density and dynamic viscosity of supercritical CO2 present a negative exponential decreasing trend with temperatures increasing，and present a linear increasing change rule with pore pressure，and is sensitive to temperature and pressure around the critical point；after the action of supercritical carbon dioxide，intensive honeycomb like pore and fracture appears，the permeability of coal improved significantly，supercritical CO2 has a better influence on improving the permeability of the coal seam.

Key words： rock mechanics supercritical CO2 permeability temperature pore pressure effective volume stress

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is2/3760

[1] 叶树集，陈鸣才，黄玉惠，等. 超临界二氧化碳渗透技术的研究进展[J]. 化学研究，1999，10(3)：38–41.(YE Shuji，CHEN Mingcai，HUANG Yuhui，et al. Progress in supercritical carbon dioxide impregnation[J]. Chemical Researches，1999，10(3)：38–41.(in Chinese))

[2] 周高宁，邹丽丽，李柏林. 超临界二氧化碳流体及其主要应用[J]. 安徽化工，2006，140(2)：16–18.(ZHOU Gaoning，ZOU Lili，LI Bailin. Supercritical fluid technique of carbon dioxide[J]. Anhui Chemical Industry，2006，140(2)：16–18.(in Chinese))

[3] ZUBER M D. production characteristics and reservoir analysis of coalbed methane reservoirs[J]. International Journal of Coal Geology，1998，38(1)：27–45.

[4] BROWN R M，CLARKSON C R. Geological control on coalbed methane reservoir capacity and gas content[J]. International Journal of Coal Geology，1998，38(1)：3–26.

[5] 吴世跃，郭勇义. 注气开采煤层气增产机制的研究[J]. 煤炭学报，2001，26(2)：199–203.(WU Shiyue，GUO Yongyi. Study of the mechanism of increasing production of exploitation coal-bed methane by gas injection[J]. Journal of China Coal Society，2001，26(2)：199–203. (in Chinese))

[6] 唐书恒，杨起，汤达祯，等. 注气提高煤层甲烷采收率机理及实验研究[J]. 石油实验地质，2002，24(6)：545–549.(TANG Shuheng，YANG Qi，TANG Dazhen，et al. Study on the experiment and mechanism of raising the recovery ratio of coalbed methane by gas injection[J]. Petroleum Geology and Experiment，2002，24(6)：545–549.(in Chinese))

[7] SOMERTON W H，SOYLEMEZOGLU L M，DUDLEY R C. Effect of stress on permeability of coal[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1975，12(5)：129–145.

[8] HARPALANI S，MOPHERSON M J. The effect of gas evacuation on coal permeability test specimens[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1984，21(3)：161–164.

[9] MCKEE C R，BUMB A C，KEENIG R A. Stress-dependent permeability and porosity of coal[C]// FASSETT J E ed. Geology and Coal-bed Methane Resources of the Northern Sanjuan Basin. Colorado，USA：Rock Mountain Association of Geologists Guidebook，1988：143–153.

[10] ENEVER J R E，HENNING A. The relationship between permeability and effective stress for Australian coal and its implications with respect to coalbed methane exploration and reservoir model[C]// Proceedings of the 1997 International Coalbed Methane Symposium. Tusealoosa，AL，USA：University of Alabama，1997：13–22.

[11] STEVE Z D H，CHU X Y，XUE F X. Dynamic nature of coal permeability ahead of a longwall face[J]. International Journal of Rock Mechanics and Mining Sciences，1999，36(5)：693–699.

[12] 林柏泉，周世宁. 煤样瓦斯渗透率的实验研究[J]. 中国矿业学院学报，1987，4(1)：21–28(LIN Baiquan，ZHOU Shining. Experimental investigation on the permeability of the coal samples containing methane[J]. Journal of CUMT International Journal of Mining Science and Technology，1987，4(1)：21–28. (in Chinese))

[13] 赵阳升，胡耀青，贺军. 三维应力与孔隙压瓦斯作用下煤体有效应力与渗透性规律的实验研究[C]// 首届全国青年岩石力学学术研讨会论文集. [S.l.]：[s.n.]，1991：1–10.(ZHAO Yangsheng，HU Yaoqing，HE Jun. The experimental study of the law of permeability with effective stress under the action of three-dimensional stress and pore pressure gas coal [C]// First National Youth Rock Mechanics Symposium. [S.l.]：[s.n.]，1991：1–10.(in Chinese))

[14] 李树刚，钱鸣高，石平武. 煤样全应力应变过程中的渗透系数–应变方程[J]. 煤田地质与勘探，2001，29(1)：22–24(LI Shugang，QIAN Minggao，SHI Pingwu. Permeability-strain equation relation to complete stress-strain path of coal sample[J]. Coal Geology and Exploration，2001，29(1)：22–24.(in Chinese))

[15] 杨永杰，宋扬，陈绍杰. 煤岩全应力–应变过程渗透性特征试验研究[J]. 岩土力学，2007，28(2)：81–85.(YANG Yongjie，SONG Yang，CHEN Shaojie. Test study on permeability properties of coal specimen in complete stress-strain process[J]. Rock and Soil Mechanics，2007，28(2)：81–85.(in Chinese))

[16] 罗新荣. 煤层瓦斯运移物理模拟与理论分析[J]. 中国矿业大学学报，1991，20(3)：55–61.(LUO Xinrong. Physical simulation and analysis of methane transport in coal seams[J]. Journal of China University of Mining and Technology，1991，20(3)：55–61.(in Chinese))

[17] 梁冰. 温度对煤体的瓦斯吸附性能影响的试验研究[J]. 黑龙江矿业学院学报，2000，10(1)：20–22(LIANG Bing. Research on temperature effects on the gas absorrtion performance[J]. Journal of Heilongjiang Mining Institute，2000，10(1)：20–22.(in Chinese))

[18] 孙可明，梁冰，王锦山. 煤层气开采中两相流阶段的流固耦合渗流[J]. 辽宁工程技术大学学报：自然科学版，2001，20(1)：36–39. (SUN Keming，LIANG Bing，WANG Jinshan. The fluid-solid-coupling seepage of two phase fluid(gas and water) in coal searns gas reservoir[J]. Journal of Liaoning Technical University：Natural Science，2001，20(1)：36–39.(in Chinese))

[19] 徐涛，唐春安，宋力，等. 含瓦斯煤岩破裂过程流固耦合数值模拟[J]. 岩石力学与工程学报，2005，24(10)：1 667–1 673.(XU Tao，TANG Chun¢an，SONG Li，et al. Numerical simulation of coupled gas flow in failure process of gassy coal-rock[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(10)：1 667–1 673.(in Chinese))