热–流–固耦合作用下含水煤层渗透率模型建立及应用研究

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (1134 KB) HTML (0 KB)
输出: BibTeX | EndNote (RIS)

摘要了解注CO2开采煤层气过程煤层内的气体流动规律对煤层气的高效开采和缓解温室效应具有重要意义。现有研究在建立煤层内渗透率模型时往往忽略了水和温度的影响，为此，建立一个新的耦合温度场–渗流场–固体力学场的模型对煤层中的气体流动规律进行研究。该模型考虑注CO2引起的气–水两元两相流、水对气体吸附性能的衰减、气体非平衡流动以及热传递和热传导作用。将建立的模型应用于沁水盆地的注CO2增采煤层气项目，数值分析煤层中气体的流动情况。研究结果表明：(1) CH4压力和水压经历三个阶段的变化，CO2压力呈现一直增加的趋势；(2) 储层注入井附近温度在开采达到一定时间后变化速率与生产井附近相同；(3) 渗透率经历3个阶段的变化，且每个阶段的控制因素不同；(4) CH4产量和CO2储量持续增加，CH4产率在出现峰值后下降，而CO2储率则一直下降。研究结果对于多物理场耦合作用下煤层内的气体流动规律认识具有一定的理论价值。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	肖智勇1
	王刚2
	刘杰1
	邓华锋1
	姜枫3
	郑程程3

关键词 ：采矿工程, 气体流动, 多物理场, 水, 吸附膨胀, CO2-ECBM

Abstract：Understanding the behavior of gas flow within coal seams during CO2 injection for coalbed methane recovery is essential for the efficient recovery of coalbed methane and the mitigation of the greenhouse effect. Previous studies have often neglected the impacts of water and temperature in permeability modeling within coal seams. Consequently，a novel permeability model that integrates thermo-hydro-mechanical fields has been developed to investigate the gas flow in coal seams. This proposed model accommodates the gas-water two-element two-phase flow resulting from CO2 injection，incorporating the reduction in gas adsorption capacity due to the presence of water presence，non-equilibrium gas flow，and the influences of heat transfer and conduction. The established model was applied to a CO2-Enhanced Coalbed Methane(CO2-ECBM) project in the Qinshui Basin to conduct a numerical analysis of gas flow within coal seams. The results show that：(1) CH4 and water pressure experience three stages，whereas CO2 pressure consistently exhibits an increasing trend. (2) Temperatures near reservoir injection wells change at the same rate as near production wells after a certain time of recovery. (3) Permeability progresses through three stages，each governed by different controlling factors. (4) Both CH4 production and CO2 storage persist in increasing，although the rate of CH4 production declines following a peak，whereas the rate of CO2 storage continues to decline. The results have some theoretical significance for the understanding of gas flow laws within coal seams under the multi-physical fields.

Key words： mining engineering gas flow multi-field water adsorption swelling CO2-ECBM

引用本文:

肖智勇1，王刚2，刘杰1，邓华锋1，姜枫3，郑程程3. 热–流–固耦合作用下含水煤层渗透率模型建立及应用研究[J]. 岩石力学与工程学报, 2024, 43(12): 3044-3057.
XIAO Zhiyong1，WANG Gang2，LIU Jie1，DENG Huafeng1，JIANG Feng3，ZHENG Chengcheng3. A permeability model of water-bearing coal seams under thermo-hydro-mechanical coupling effect and its application. , 2024, 43(12): 3044-3057.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2024/V43/I12/3044

[1]	苏现波，黄津，王乾，等. CO2强化煤层气产出与其同步封存实验研究[J]. 煤田地质与勘探，2023，51(1)：176–184.(SU Xianbo，HUANG Jin，WANG Qian，et al. Experimental study on CO2-enhanced coalbed methane production and its simultaneous storage[J]. Coal Geology and Exploration，2023，51(1)：176–184.(in Chinese))
[2]	程先振，陈连军，栾恒杰，等. 煤层气运移过程中损伤效应对煤强度的弱化影响[J]. 岩石力学与工程学报，2022，41(3)：503–514. (CHENG Xianzhen，CHEN Lianjun，LUAN Hengjie，et al. Damage effect of coalbed methane transport on coal strength[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(3)：503–514.(in Chinese))
[3]	GUNTER W D，MAVOR M J，ROBINSON J R. CO2 storage and enhanced methane production：field testing at Fenn-Big Valley，Alberta，Canada，with application[C]// Greenhouse Gas Control Technologies 7. [S. l.]：Elsevier Science Ltd.，2005：413–421.
[4]	程先振，陈连军，栾恒杰，等. 基质–裂隙相互作用对煤渗透率的影响：考虑煤的软化[J]. 岩土工程学报，2022，44(10)：1 890– 1 898.(CHENG Xianzhen，CHEN Lianjun，LUAN Hengjie，et al. Influences of softening behaviour of coal on evolution of its permeability by considering matrix-fracture interactions[J]. Chinese Journal of Geotechnical Engineering，2022，44(10)：1 890–1 898.(in Chinese))
[5]	DAY S，FRY R，SAKUROVS R. Swelling of coal in carbon dioxide，methane and their mixtures[J]. International Journal of Coal Geology，2012，93：40–48.
[6]	VAN BERGEN F，HOL S，SPIERS C. Stress-strain response of pre-compacted granular coal samples exposed to CO2，CH4，He and Ar[J]. International Journal of Coal Geology，2011，86(2/3)：241–253.
[7]	ZHAO L，GUANHUA N，YONGZAN W，et al. Analysis of permeability evolution mechanism during CO2 enhanced coalbed methane recovery based on impact factor method[J]. Fuel，2021，304(11)：121389.
[8]	WU Y，LIU J，CHEN Z，et al. A dual poroelastic model for CO2-enhanced coalbed methane recovery[J]. International Journal of Coal Geology，2011，86(2/3)：177–189.
[9]	FANG H，SANG S，LIU S. The coupling mechanism of the thermal-hydraulic-mechanical fields in CH4-bearing coal and its application in the CO2-enhanced coalbed methane recovery[J]. Journal of Petroleum Science and Engineering，2019，181(10)：106177.
[10]	FAN Y，DENG C，ZHANG X，et al. Numerical study of multi-branch horizontal well coalbed methane extraction[J]. Energy Sources，Part A：Recovery，Utilization and Environmental Effects，2018，40(11)：1 342–1 350.
[11]	LI Z，NI G，WANG Y，et al. Analysis of permeability evolution mechanism during CO2 enhanced coalbed methane recovery based on impact factor method[J]. Fuel，2021，304(11)：121389.
[12]	LIU S，FANG H，SANG S，et al. CO2 injectability and CH4 recovery of the engineering test in qinshui Basin，China based on numerical simulation[J]. International Journal of Greenhouse Gas Control，2020，95(4)：102980.
[13]	FAN C，ELSWORTH D，LI S，et al. Thermo-hydro-mechanical-chemical couplings controlling CH4 production and CO2 sequestration in enhanced coalbed methane recovery[J]. Energy，2019，173(4)：1 054–1 077.
[14]	XIAO Z，WANG G，WANG C，et al. Permeability evolution and gas flow in wet coal under non-equilibrium state：Considering both water swelling and process-based gas swelling[J]. International Journal of Mining Science and Technology，2023，33(5)：585–599.
[15]	张宏学. 页岩储层渗流–应力耦合模型及应用[博士学位论文][D].徐州：中国矿业大学，2015.(ZHANG Hongxue. Seepage and stress coupling model for shale reservoir and its application[Ph. D. Thesis][D]. Xuzhou：China University of Mining and Technology，2015.(in Chinese))
[16]	CHEN M，MASUM S，THOMAS H. Modeling adsorption and transport behavior of gases in moist coal matrix[J]. Energy and Fuels，2021，35(16)：13 200–13 214.
[17]	CROSDALE P J，MOORE T A，MARES T E. Influence of moisture content and temperature on methane adsorption isotherm analysis for coals from a low-rank，biogenically-sourced gas reservoir[J]. International Journal of Coal Geology，2008，76(1/2)：166–174.
[18]	LI J，CHEN Z，WU K，et al. Effect of water saturation on gas slippage in circular and angular pores[J]. AIChE Journal，2018，64(9)：3 529–3 541.
[19]	王刚，肖智勇，王长盛，等. 基于非平衡状态的煤层中气体运移规律研究[J]. 岩土工程学报，2022，44(8)：1 512–1 520.(WANG Gang，XIAO Zhiyong，WANG Changsheng，et al. Gas transport in coal seams based on non-equilibrium state[J]. Chinese Journal of Geotechnical Engineering，2022，44(8)：1 512–1 520.(in Chinese))
[20]	LIU H H，RUTQVIST J. A new coal-permeability model：internal swelling stress and fracture–matrix interaction[J]. Transport in Porous Media，2010，82(7)：157–171.
[21]	CHEN D，PAN Z，LIU J，et al. Modeling and simulation of moisture effect on gas storage and transport in coal seams[J]. Energy and Fuels，2012，26(3)：1 695–1 706.
[22]	WANG G，XU F，XIAO Z，et al. Improved permeability model of the binary gas interaction within a two-phase flow and its application in CO2-enhanced coalbed methane recovery[J]. ACS Omega，2022，7(35)：31 167–31 182.
[23]	JIANG C，ZHAO Z，ZHANG X，et al. Controlling effects of differential swelling index on evolution of coal permeability[J]. Journal of Rock Mechanics and Geotechnical Engineering，2020，12(3)：461–472.
[24]	XIAO Z，WANG C，WANG G，et al. An improved apparent permeability model considering full pore pressure range，variable intrinsic permeability and slippage coefficient[J]. International Journal of Mining Science and Technology，2022，32(6)：1 233–1 244.
[25]	CHEN Z，PAN Z，LIU J，et al. Effect of the effective stress coefficient and sorption-induced strain on the evolution of coal permeability：experimental observations[J]. International Journal of Greenhouse Gas Control，2011，5(5)：1 284–1 293.
[26]	LI J，LI X，WU K，et al. Thickness and stability of water film confined inside nanoslits and nanocapillaries of shale and clay[J]. International Journal of Coal Geology，2017，179(6)：253–268.
[27]	BESKOK A，KARNIADAKIS G E. Report：a model for flows in channels，pipes，and ducts at micro and nano scales[J]. Microscale Thermophysical Engineering，1999，3(1)：43–77.
[28]	CIVAN F. Effective correlation of apparent gas permeability in tight porous media[J]. Transport in porous media，2010，82(7)：375–384.
[29]	WANG G，WANG K，JIANG Y，et al. Reservoir permeability evolution during the process of CO2-enhanced coalbed methane recovery[J]. Energies，2018，11(11)：2 996.
[30]	YIN G，DENG B，LI M，et al. Impact of injection pressure on CO2-enhanced coalbed methane recovery considering mass transfer between coal fracture and matrix[J]. Fuel，2017，196(5)：288–297.
[31]	PENG Y，LIU J，PAN Z，et al. Impact of coal matrix strains on the evolution of permeability[J]. Fuel，2017，189(2)：270–283.