含水煤岩裂隙压缩特征及渗透特性研究

doi:10.13722/j.cnki.jrme.2020.0288

Abstract
Figure/Table
References (0)
Related Citation (15)

Download: PDF (457 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract In order to study the influence of the water content，the effective stress and the fracture compressibility on the permeability of coal during deep coal mining，isothermal adsorption test and seepage test of coal under different water content conditions were respectively performed by using HCA-type high-pressure capacity method adsorption device and gas-containing coal thermal-fluid-solid triaxial servo seepage device. A coal permeability model considering the combined effect of the water content and the fracture compressibility was established，and the change law of the effective compressibility coefficient and the permeability of coal under different water content conditions was analyzed. The results show that，when the gas pressure is constant at 1 MPa，the axial and radial strains of coal increase with increasing the effective stress，and that，when the effective stress is constant，the axial and radial strains of coal and the gas flow decrease gradually with increasing the water content. As the gas pressure increases，the coal gas adsorption capacity first increases and then tends to be saturated after the gas pressure reaching a certain value between 1 and 2 MPa. Under the same water content，the permeability of coal decreases with increasing the effective stress. When the effective stress is constant，water has a limiting effect on the permeability of coal，in other words，the permeability decreases with increasing the water content. There is a negative correlation between the adsorption deformation and the effective compressibility coefficient at different water cuts，and the effective compressibility coefficient has a negative correlation with the water cut. The calculated permeability by the developed model is basically consistent with the measured，showing that the developed model can better characterize the evolution law of the coal permeability with increasing the effective stress under different water content conditions.

Key words： rock mechanics coal adsorption permeability water content effective compressibility coefficient

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	LI Bobo1
	2
	3
	CHENG Qiaoyun1
	LI Jianhua1
	WANG Bin1
	XU Jiang4
	GAO Zheng1

Cite this article:

LI Bobo1,2,3, et al. Study on fracture compression and permeability of water-bearing coal[J]. , 2020, 39(10): 2069-2078.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0288 OR https://rockmech.whrsm.ac.cn/EN/Y2020/V39/I10/2069

[1]	YUAN L. Theory and practice intergrated coal production and gas extraction[J]. International Journal of Coal Science and Technology，2015，2(1)：3-11.
[2]	SHAO P，WANG X，SONG Y，et al. Study on the characteristics of matrix compressibility and its influence factors for different rank coals[J]. Journal of Natural Gas Science and Engineering，2018，56：93-106.
[3]	WANG S，ELSWORTH D，LIU J，Permeability evolution in fractured coal：the roles of fracture geometry and water-content[J]. International Journal of Coal Geology，2011，87：13-25.
[4]	TAN Y L，PAN Z J，FENG X-T，et al. Laboratory characterization of fracture compressibility for coal and shale gas reservoir rocks：A review[J]. International Journal of Coal Geology，2019，204：1-7.
[5]	MCKEE C R，BUMB A C，KOENING R A. Stress-dependent permeability and porosity of coal and other geologic formations[C]// Geology and Coal-bed Methane Resources of the Northern San Juan Basin. Colorado：Society of Petroleum Engineers，1988：143-153.
[6]	刘建军，刘先贵. 有效压力对低渗透多孔介质孔隙度、渗透率的影响[J]. 地质力学学报，2001，(1)：41-44.(LIU Jianjun，LIU Xiangui. Effect of effective pressure on porosity and permeability of low-permeability porous media[J]. Journal of Geomechanics，2001，(1)：41-44.(in Chinese))
[7]	许江，张丹丹，彭守建，等. 三轴应力条件下温度对原煤渗流特性影响的实验研究[J]. 岩石力学与工程学报，2011，30(9)：1 848-1 854.(XU Jiang，ZHANG Dandan，PENG Shoujian，et al. Experimental research on impact of temperature on seepage characteristics of coal containing methane under triaxial stress[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(9)：1 848-1 854.(in Chinese))
[8]	刘震，李增华，杨永良，等. 水分对煤体瓦斯吸附及径向渗流影响试验研究[J]. 岩石力学与工程学报，2014，33(3)：586-593.(LIU Zhen，LI Zenghua，YANG Yongliang，et al. Experimental study on the effect of moisture on coal gas absorption and radial seepage[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(3)：586-593.(in Chinese))
[9]	魏建平，位乐，王登科. 含水率对含瓦斯煤的渗流特性影响试验研究[J]. 煤炭学报，2014，39(1)：97-103.(WEI Jianping，WEI Le，WANG Dengke. Experimental study of moisture content influences on permeability of coal containing gas[J]. Journal of China Coal Society，2014，39(1)：97-103.(in Chinese))
[10]	尹光志，蒋长宝，许江，等. 煤层气储层含水率对煤层气渗流影响的试验研究[J]. 岩石力学与工程学报，2011，30(增2)：3 401-3 406.(YIN Guangzhi，JIANG Changbao，XU Jiang，et al. Experimental study of influences for water content in coalbed gas reservoirs on methane seepage[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(Supp.2)：3 401-3 406.(in Chinese))
[11]	肖晓春，潘一山，吕祥锋，等. 含水煤岩变形破坏过程中瓦斯运移规律的实验研究[J]. 煤炭学报，2012，37(增1)：115-119.(XIAO Xiaochun，PAN Yishan，LU Xiangfeng，et al. Experimental research on gas flow law of containing water coal specimens in deformation and fracture process[J]. Journal of China Coal Society，2012，37(Supp.1)：115-119.(in Chinese))
[12]	刘永茜，张浪，李浩荡，等. 含水率对煤层气渗流的影响[J]. 煤炭学报，2014，39(9)：1 840-1 844.(LIU Yongqian，ZHANG Lang，LI Haodang，et al. Effect of moisture content on CBM seepage[J]. Journal of China Coal Society，2014，39(9)：1 840-1 844.(in Chinese))
[13]	ZHANG G，RANJITH P G，LIANG W，et al. Stress-dependent fracture porosity and permeability of fractured coal：An in-situ X-ray tomography study[J]. International Journal of Coal Geology，2019，213：103279.
[14]	MOOSAVI S A，GOSHTASBI K，KAZEMZADEH E，et al. Relationship between porosity and permeability with stress using pore volume compressibility characteristic of reservoir rocks[J]. Arabian Journal of Geosciences，2014，7(1)：231-239.
[15]	LAN Y，DAVUDOV D，MOGHANLOO R G.，Interplay between permeability and compressibility in samples[J]. Journal of Petroleum Science and Engineering，2017，159：644-653.
[16]	THARAROOP P，KAPPYN Z T，ERTEKIN T. Development of a material balance equation for coalbed methane reservoirs accounting for the presence of water in the coal matrix and coal shrinkage and swelling[J]. Journal of Unconventional Oil and Gas Resources，2015，9：153-162.
[17]	PALMER I，MANSOORI J. How permeability depends on stress and pore pressure in coalbeds：a new model[J]. Society of Petroleum Engineers，1998，1(6)：539-544.
[18]	CONNELL L D，LU M，PAN Z J. An analytical coal permeability model for tri-axial strain and stress conditions[J]. International Journal of Coal Geology，2010，84(2)：103-114.
[19]	SHI J Q，DURUCAN S. Drawdown induced changes in permeability of coalbeds：a new interpretation of the reservoir response to primary recovery[J]. Transport in Porous Media，2004，56(1)：1-16.
[20]	CUI X，BUSTIN R M. Volumetric strain associated with methane desorption and its impact on coalbed gas production from deep coal seams[J]. AAPG Bulletin，2005，89(9)：1 181-1 202.
[21]	宋昱，姜波，李明，等. 低中煤级构造煤超临界甲烷吸附特性及吸附模型适用性[J]. 煤炭学报，2017，42(8)：2 063-2 073. (SONG Yu，JIANG Bo，LI Ming，et al. Super critical CH4 adsorption characteristics and applicability of adsorption models for low middle-rank tectonically deformed coals[J]. Journal of China Coal Society，2017，42(8)：2 063-2 073.(in Chinese))
[22]	周军平，鲜学福，李晓红，等. 吸附不同气体对煤岩渗透特性的影响[J]. 岩石力学与工程学报，2010，29(11)：2 256-2 262.(ZHOU Junping，XIAN Xuefu，LI Xiaohong，et al. Effect of different adsorptional gases on permeability of coal[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(11)：2 256-2 262.(in Chinese))
[23]	LU S，CHENG Y，LI W. Model development and analysis of the evolution of coal permeability under different boundary conditions[J]. Journal of Natural Gas Science and Engineering，2016，31：129-138.
[24]	LI B B，REN C H，WANG Z H，et al. Experimental study on damage and the permeability evolution process of methane-containing coal under different temperature conditions[J]. Journal of Petroleum Science and Engineering，2020，184：106509.
[25]	SETZMANN U，WAGNER W. A new equation of state and tables of thermodynamic properties for methane covering the range from the melting line to 625 K at pressures up to 100 MPa[J]. Journal of Physical and Chemical Reference Data，1991，20(6)：1 061-1 155.
[26]	张国华，梁冰，毕业武. 水锁对含瓦斯煤体的瓦斯解吸的影响[J]. 煤炭学报，2012，37(2)：253-258.(ZHANG Guohua，LIANG Bing，BI Yewu，Effect of water lock on gas desorption of gas-bearing coal body[J]. Journal of China Coal Society，2012，37(2)：253-258.(in Chinese))
[27]	李波波，李建华，杨康，等. 考虑含水率影响的煤岩变形及渗透率模型[J]. 煤炭学报，2019，44(4)：1 076-1 083.(LI Bobo，LI Jianhua，YANG Kang，et al. Deformation and permeability model of coal and rock considering moisture content[J]. Journal of China Coal Society，2019，44(4)：1 076-1 083.(in Chinese))
[28]	BANGHAM D H，FAKHOURY N. The translation motion of molecules in the adsorbed phase on solids[J]. Journal of the Chemical Society，1931：1 324-1 333.
[29]	MAGGS F A P. The adsorption-swelling of several carbonaceous solids：transactions of the faraday society[J]. 1946，42：B284-B288.
[30]	ADAMSON A W，GAST A P. Physical chemistry of surface[M]. 6th ed. New York：John Wiley and Sons.，1997：350-351.
[31]	LIU S，HARPALANI S. A new theoretical approach to model sorption-induced coal shrinkage or swelling[J]. AAPG bulletin，2013，97(7)：1 033-1 049.
[32]	ZHU S，DU Z，LI C，et al. An analytical model for pore volume compressibility of reservoir rock[J]. Fuel，2018，232：543-549.
[33]	TERRY R E，ROGERS J B，CRAFT B C. Applied petroleum reservoir engineering[M]. America：OilReservoirEngineering，1991：159-173.
[34]	KUMAR H，ELSWORTH，LIU J，et al. Optimizing enhanced coalbed methane recovery for unhindered production and CO2 injectivity[J]. International Journal of Greenhouse Gas Control，2012，11：86-97.
[35]	姜永东，阳兴洋，鲜学福，等. 应力场、温度场、声场作用下煤层气的渗流方程[J]. 煤炭学报，2010，35(3)：434-438.(JIANG Yongdong，YANG Xingyang，XIAN Xuefu，et al. The infiltration equation of coal bed under the cooperation of stress field，temperature field and sound field[J]. Journal of China Coal Society，2010，35(3)：434-438.(in Chinese))
[36]	李志强，鲜学福，隆晴明. 不同温度应力条件下煤体渗透率实验研究[J]. 中国矿业大学学报，2009，38(4)：523-527.(LI Zhiqiang，XIAN Xuefu，LONG Qingming. Experiment study of coal permeability under different temperature and stress[J]. Journal of China University of Mining and Technology，2009，38(4)：523-527.(in Chinese))
[37]	赵阳升，胡耀青，杨栋，等. 三维应力下吸附作用对煤岩体气体渗流规律影响的实验研究[J]. 岩石力学与工程学报，1999，18(6)：651-653.(ZHAO Yangsheng，HU Yaoqing，YANG Dong，et al. The experimental study on the gas seepage law of rock related to adsorption under 3D stress[J]. Chinese Journal of Rock Mechanics and Engineering，1999，18(6)：651-653.(in Chinese))
[38]	CUI X，BUSTIN R M，CHIKATAMARLA L. Adsorption induced coal swelling and stress：implications for methane production and acid gas sequestration into coal seams[J]. Journal of Geophysical Research，2007，112(B10)：1-16.
[39]	聂百胜，何学秋，王恩元，等. 煤吸附水的微观机理[J]. 中国矿业大学学报，2004，33(4)：379-383.(NIE Baisheng，HE Xueqiu，WANG Enyuanet，et al. Micro-mechanism of coal adsorbing water [J]. Journal of China University of Mining and Technology，2004，33(4)：379-383.(in Chinese))
[40]	周哲，卢义玉，葛兆龙，等. 水-瓦斯-煤三相耦合作用下煤岩强度特性及实验研究[J]. 煤炭学报，2014，39(12)：2 418-2 424. (ZHOU Zhe，LU Yiyu，GE Zhaolong，et al. Theoretical and experimental study on strength characteristics of coal under coupling effect of water and gas[J]. Journal of China Coal Society，2014，39(12)：2 418-2 424.(in Chinese))
[41]	LEVINE J R. Model study of the influence of matrix shrinkage on absolute permeability of coal bed reservoirs[J]. Geological Society London Special Publications，1996，109(1)：197-212.