原油浸泡对煤微观孔隙结构特征的影响研究

doi:10.16265/j.cnki.issn1003-3033.2023.12.2396

中国安全科学学报 ›› 2023, Vol. 33 ›› Issue (12): 113-121.doi: 10.16265/j.cnki.issn1003-3033.2023.12.2396

原油浸泡对煤微观孔隙结构特征的影响研究

双海清¹^,²(), 魏萌萌¹^,², 白杨¹^,², 张瑾³^,^**(), 田雨¹^,², 张星¹^,²

¹ 西安科技大学安全科学与工程学院,陕西西安 710054
² 煤炭行业西部矿井瓦斯智能抽采工程研究中心, 陕西西安 710054
³ 西部煤矿瓦斯灾害防控陕西省高等学校重点实验室,陕西西安 710054

收稿日期:2023-06-14 修回日期:2023-09-17 出版日期:2023-12-28
通讯作者:
**张瑾(1988—),女,陕西西安人,博士,讲师,主要从事化学有机合成及煤岩微观结构机制方面的研究。E-mail: 444136313@qq.com。
作者简介:
双海清 (1988—),男,陕西靖边人,博士,副教授,主要从事矿井瓦斯灾害防治等方面的研究。E-mail: shuanghaiqing@163.com。
白杨,讲师
张瑾,讲师
基金资助:
国家自然科学基金资助(51904238); 中国博士后科学基金资助(2019M663937XB); 中国博士后科学基金资助(2022MD713795); 陕西省自然科学基金青年项目资助(2022JQ-347); 陕西省教育厅青年创新团队项目(22JP048)

Effect of crude oil immersion on micropore structure of coal

SHUANG Haiqing¹^,²(), WEI Mengmeng¹^,², BAI Yang¹^,², ZHANG Jin³^,^**(), TIAN Yu¹^,², ZHANG Xing¹^,²

¹ College of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an Shaanxi 710054, China
² Engineering Research Center of Intelligent Gas Extraction in Western Mine, Xi'an University of Science and Technology, Xi'an Shaanxi 710054, China
³ Shaanxi Provincial Key Laboratory of Gas Disaster Prevention and Control in Western Coal Mines, Xi'an Shaanxi 710054, China

Received:2023-06-14 Revised:2023-09-17 Published:2023-12-28

摘要/Abstract

摘要：

为研究原油浸泡对煤体孔隙结构的影响,首先选用典型煤油伴生矿井煤样,对煤样进行不同天数的原油浸泡处理;然后采用压汞、低温氮吸附等仪器,研究浸油前后煤的孔隙形态、类型、孔容积及比表面积等变化特征,并结合扫描电镜(SEM)揭示原油侵入煤体的微观机制。研究表明:煤样通过原油浸泡后,进退汞曲线及低温吸脱附曲线均有滞后环且明显的滞后现象,煤样的微小孔隙由原来的平行板孔转为尖劈形孔,孔隙间连通性变差。随着浸油天数的增加,原油浸泡对煤孔隙影响明显,与原煤样相比,煤样的总孔容积降低32%~80%,其中大孔、中孔孔容下降程度显著;煤样的总孔比表面积降低87%~94%,其中小孔、微孔比表面积下降程度显著;原油在煤体中的流动大致分为较大孔裂隙的贯通-中大孔的填充-微小孔隙的堵塞等3部分。

关键词: 原油浸泡, 浸油煤样, 孔隙结构, 孔隙形态, 孔容, 孔比表面积

Abstract:

In order to study the change law of coal pore structure after crude oil immersion, typical coal samples associated with kerosene mine were selected and immersed in crude oil for different days. The changes of pore morphology, type, pore volume and specific surface area of coal before and after oil immersion were studied by mercury intrusion method and low temperature nitrogen adsorption method, and the microscopic mechanism of crude oil invading coal was revealed by scanning electron microscope (SEM). The research shows that after the coal sample is immersed in crude oil, the mercury entry and exit curve and the low temperature adsorption and desorption curve have obvious weakening trends. The tiny pores of the coal sample change from the original parallel plate pores to the wedge-shaped pores, and the connectivity between the pores becomes worse. With the increase of oil immersion days, the effect of crude oil immersion on coal porosity is obvious. Compared with raw coal samples, the total pore volume of coal samples is reduced by 32%-80%, and the pore volume of macropores and mesopores decreases significantly. The total pore specific surface area of coal samples decreases by 87%-94%, and the specific surface area of small pores and micropores decreases significantly. The flow of crude oil in coal can be roughly divided into three parts: the penetration of large pores and fractures-the filling of medium and large pores-the blockage of small pores.

Key words: crude oil immersion, oil-immersed coal sample, pore structure, pore morphology, pore volume, specific surface area

双海清, 魏萌萌, 白杨, 张瑾, 田雨, 张星. 原油浸泡对煤微观孔隙结构特征的影响研究[J]. 中国安全科学学报, 2023, 33(12): 113-121.

SHUANG Haiqing, WEI Mengmeng, BAI Yang, ZHANG Jin, TIAN Yu, ZHANG Xing. Effect of crude oil immersion on micropore structure of coal[J]. China Safety Science Journal, 2023, 33(12): 113-121.

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参考文献 25

[1]	陈冬冬. 煤油气共生矿井围岩气多因素耦合区域预测技术:以鄂尔多斯盆地黄陵矿区为例[J]. 煤田地质与勘探, 2018, 46(2):49-53.
	CHEN Dongdong. Prediction technology of surrounding rock gas zones by multiple factor coupling in coal mines with coal-oil-gas coexistence[J]. Coal Geology & Exploration, 2018, 46(2):49-53.
[2]	司磊磊, 席宇君, 王洪洋, 等. 水浸干燥后煤的孔隙结构及瓦斯吸附特性变化规律[J]. 煤田地质与勘探, 2021, 49(1):100-107.
	SI Leilei, XI Yujun, WANG Hongyang, et al. The characteristics of pore structure and gas adsorption for water-immersion coal after drying[J]. Coal Geology & Exploration, 2021, 49(1):100-107.
[3]	YANG Yongliang, LI Zenghua, SI Leilei, et al. Study governing the impact of long-term water immersion on coal spontaneous ignition[J]. Arabian Journal for Science and Engineering, 2017, 42(4):1359-1369. doi: 10.1007/s13369-016-2245-9
[4]	张书林, 刘永茜, 孟涛. 不同矿化度水对煤的甲烷解吸影响的试验研究[J]. 煤炭科学技术, 2021, 49(7):110-117.
	ZHANG Shulin, LIU Yongqian, MENG Tao. Experimental study on influence of water with different salinity on methane desorption performance of coal seam[J]. Coal Science and Technology, 2021, 49(7):110-117.
[5]	程晓茜, 田继军, 王海超, 等. H₂S水溶液对低阶煤孔隙结构影响的实验研究[J]. 煤炭学报, 2020, 45(4):1436-1444.
	CHENG Xiaoqian, TIAN Jijun, WANG Haichao, et al. Experimental research on the effect of H₂S solution structure of low-rank coal[J]. Journal of China Coal Society, 2020, 45(4):1436-1444.
[6]	许江, 蔡果良, 彭守建, 等. 温度对二次炭化型煤吸附特性及孔结构影响的研究[J]. 煤炭科学技术, 2021, 49(11):21-29.
	XU Jiang, CAI Guoliang, PENG Shoujian, et al. Effect of temperature on adsorption characteristics and pore structure of secondary carbonized briquette[J]. Coal Science and Technology, 2021, 49(11):21-29.
[7]	LI Xiangchen, KANG Yili, MANOUCHEH H. Investigation of pore size distributions of coals with different structures by nuclear magnetic resonance (NMR) and mercury intrusion porosimetry (MIP)[J]. Measurement, 2018, 116:122-128. doi: 10.1016/j.measurement.2017.10.059
[8]	陈刘瑜, 李希建, 沈仲辉, 等. 贵州北部突出煤的孔隙结构及分形特征研究[J]. 中国安全科学学报, 2020, 30(2):66-72. doi: 10.16265/j.cnki.issn1003-3033.2020.02.011
	CHEN Liuyu, LI Xijian, SHEN Zhonghui, et al. Pore structure and fractal characteristics of outburst coal in northern Guizhou[J]. China Safety Science Journal, 2020, 30(2):66-72. doi: 10.16265/j.cnki.issn1003-3033.2020.02.011
[9]	刘佳佳, 胡建敏, 杨明, 等. 不同层理高阶煤孔隙特征的核磁共振试验[J]. 中国安全科学学报, 2021, 31(9):83-89. doi: 10.16265/j.cnki.issn1003-3033.2021.09.012
	LIU Jiajia, HU Jianmin, YANG Ming, et al. Nuclear magnetic resonance experimental study on pore characteristics of high rank coal with different bedding[J]. China Safety Science Journal, 2021, 31(9):83-89. doi: 10.16265/j.cnki.issn1003-3033.2021.09.012
[10]	李阳, 张玉贵, 张浪, 等. 基于压汞、低温N₂吸附和CO₂吸附的构造煤孔隙结构表征[J]. 煤炭学报, 2019, 44(4):1188-1196.
	LI Yang, ZHANG Yugui, ZHANG Lang, et al. Characterization on pore structure of tectonic coals based on the method of mercury intrusion, carbon dioxide adsorption and nitrogen adsorption[J]. Journal of China Coal Society, 2019, 44(4): 1188-1196.
[11]	杨青, 李剑, 田广文, 等. 海拉尔盆地褐煤全孔径结构特征及影响因素[J]. 天然气地球科学, 2020, 31(11): 1603-1614.
	YANG Qing, LI Jian, TIAN Guangwen, et al. Characteristics on pore structures on full scale of lignite and main controlling factors in Hailar Basin[J]. Natural Gas Geoscience, 2020, 31(11):1603-1614.
[12]	杨明, 柳磊, 张学博, 等. 不同阶煤孔隙结构与流体特性的核磁共振试验研究[J]. 中国安全科学学报, 2021, 31(1):81-88. doi: 10.16265/j.cnki.issn 1003-3033.2020.01.012
	YANG Ming, LIU Lei, ZHANG Xuebo, et al. Nuclear magnetic resonance experimental study on pore structure and fluid characteristics of coal at different ranks[J]. China Safety Science Journal, 2021, 31(1):81-88. doi: 10.16265/j.cnki.issn 1003-3033.2020.01.012
[13]	王以贤, 梁为民. 冲击荷载对无烟煤微纳观孔隙结构的影响[J]. 天然气工业, 2019, 39(9):73-81.
	WANG Yixian, LIANG Weimin. Effect of impact loads on the micro-nanopore structure of anthracite coal[J]. Natural Gas Industry, 2019, 39(9): 73-81.
[14]	林柏泉, 钟璐斌, 张祥良, 等. 高压电脉冲对烟煤微观孔隙结构的影响作用[J]. 采矿与安全工程学报, 2022, 39(2):380-386.
	LIN Baiquan, ZHONG Lubin, ZHANG Xiangliang, et al. Effect of high voltage pulse on micro-pore structure of bituminous coal[J]. Journal of Mining & Safety Engineering, 2022, 39(2): 380-386.
[15]	CHEN Shida, TAO Shu, TANG Dazhen, et al. Pore structure characterization of different rank coals using N₂ and CO₂ adsorption and its effect on CH₄ adsorption capacity: a case in Panguan syncline, western Guizhou, China[J]. Energy & Fuels, 2017, 31(6):6034-6044. doi: 10.1021/acs.energyfuels.7b00675
[16]	邬灿春, 秦汝祥, 戴广龙, 等. 油浸煤自然发火标志气体确定的实验研究[J]. 煤矿安全, 2018, 49(10):24-29.
	WU Canchun, QIN Ruxiang, DAI Guanglong, et al. Experimental study on mark gas determination of spontaneous combustion of oil-immersed coal[J]. Safety in Coal Mines, 2018, 49(10): 24-29.
[17]	徐永亮, 王少坤, 余明高, 等. 煤油共生矿区含油煤层自燃特性试验研究[J]. 中国安全科学学报, 2015, 25(4):47-52.
	XU Yongliang, WANG Shaokun, YU Minggao, et al. Experimental study on spontaneous combustion characteristics of coal seam in coal-oil coexisting mining area[J]. China Safety Science Journal, 2015, 25(4):47-52.
[18]	窦成义, 王福军, 张亚潮. 煤油共生条件下原油对煤自燃特性影响的试验[J]. 陕西煤炭, 2022, 41(3):5-12.
	DOU Chengyi, WANG Fujun, ZHANG Yachao. Experiment on the effect of crude oil on coal spontaneous combustion under the condition of coexistence of coal and oil[J]. Shaanxi Coal, 2022, 41(3):5-12.
[19]	王洋. 黄陵矿含油煤自燃标志性气体指标优选研究[D]. 淮南: 安徽理工大学, 2018.
	WANG Yang. Study on the optimization of characteristic gas indexes of spontaneous combustion of oil-bearing coal in Huangling mine[D]. Huainan: Anhui University of Science and Technology, 2018.
[20]	邵龙义, 李佳旭, 王帅, 等. 海拉尔盆地褐煤液氮吸附孔的孔隙结构及分形特征[J]. 天然气工业, 2020, 40(5): 15-25.
	SHAO Longyi, LI Jiaxu, WANG Shuai, et al. Pore structures and fractal characteristics of liquid nitrogen adsorption pores in lignite in the Hailar Basin[J]. Natural Gas Industry, 2020, 40(5):15-25.
[21]	林海飞, 程博, 李树刚, 等. 煤的吸附孔结构对瓦斯放散特性影响的实验研究[J]. 采矿与安全工程学报, 2016, 33(3): 557-563.
	LIN Haifei, CHENG Bo, LI Shugang, et al. Experimental study on the effect of adsorption pore structure on gas emission characteristics[J]. Journal of Mining & Safety Engineering, 2016, 33(3):557-563.
[22]	吴俊, 金奎励, 童有德, 等. 煤孔隙理论及在瓦斯突出和抽放评价中的应用[J]. 煤炭学报, 1991, 16(3):86-95.
	WU Jun, JIN Kuili, TONG Youde, et al. Coal porosity theory and its application in evaluation of gas outburst and drainage[J]. Journal of China Coal Society, 1991, 16(3): 86-95.
[23]	陈萍, 唐修义. 低温氮吸附法与煤中微孔隙特征的研究[J]. 煤炭学报, 2001, 26(5):552-556.
	CHEN Ping, TANG Xiuyi. The research on the adsorption of nitrogen in low temperature and micro-pore properties in coal[J]. Journal of China Coal Society, 2001, 26(5): 552-556.
[24]	尹振勇, 许浩, 汤达祯, 等. 不同煤阶煤热解过程中孔隙结构变化规律研究[J]. 煤炭科学技术, 2019, 47(9): 74-79.
	YIN Zhenyong, XU Hao, TANG Dazhen, et al. Study on pore structure change during different coal grade pyrolysis[J]. Coal Science and Technology, 2019, 47(9):74-79.
[25]	林海飞, 卜婧婷, 严敏, 等. 中低阶煤孔隙结构特征的氮吸附法和压汞法联合分析[J]. 西安科技大学学报, 2019, 39(1): 1-8.
	LIN Haifei, BU Jingting, YAN Min, et al Joint analysis of pore structure characteristics of middle and low rank coal with nitrogen adsorption and mercury intrusion method[J]. Journal of Xi'an University of Science and Technology, 2019, 39(1):1-8.

密度 (20 ℃)/ (g·mL^-1)	黏度 (50 ℃)/ (mm²·s^-1)	凝点/ ℃	组分含量测定
密度 (20 ℃)/ (g·mL^-1)	黏度 (50 ℃)/ (mm²·s^-1)	凝点/ ℃	饱和烃/%	芳香烃/%	沥青质/%	非烃/ %
0.885 1	17.08	-3.5	75.6	11.6	1.24	5.79

煤样编号	煤样	工业分析				元素分析
煤样编号	煤样	水分	灰分	挥发分	固定碳	碳元素	氢元素	氮元素	氧元素
1-1	原煤样	1.98	6.61	35.15	57.09	68.96	4.06	2.25	24.46
2-1	浸油煤样1	2.21	5.32	31.84	60.63	83.95	5.24	2.62	7.98
2-2	浸油煤样2	2.19	5.66	32.72	59.43	83.70	5.33	2.02	8.76
2-3	浸油煤样3	2.06	8.19	34.01	55.74	80.10	5.18	2.95	11.52
2-4	浸油煤样4	2.41	8.78	33.76	55.05	80.76	5.02	3.40	10.57

煤样编号	压汞法孔容积				氮吸附法孔容积
煤样编号	微孔	小孔	中孔	大孔	微孔	小孔	中孔
1-1	0.029 19	0.022 32	0.009 31	0.065 65	0.001 174	0.003 527	0.002 098
2-1	0.022 85	0.016 51	0.005 51	0.047 96	0.000 040	0.000 396	0.000 292
2-2	0.026 61	0.011 19	0.001 01	0.021 16	0.000 058	0.000 344	0.000 220
2-3	0.026 86	0.011 05	0.000 98	0.017 31	0.000 026	0.000 313	0.000 309
2-4	0.025 68	0.010 97	0.000 10	0.014 93	0.000 060	0.000 487	0.000 331

煤样编号	压汞法比表面积				氮吸附法比表面积
煤样编号	微孔	小孔	中孔	大孔	微孔	小孔	中孔
1-1	22.504 41	4.398 08	0.240 07	0.004 97	0.974 31	0.496 27	0.047 79
2-1	17.324 71	3.609 67	0.122 22	0.005 25	0.038 92	0.052 81	0.007 37
2-2	20.724 02	3.135 36	0.030 43	0.000 70	0.070 88	0.050 97	0.006 02
2-3	21.107 44	3.062 4	0.029 64	0.000 52	0.026 25	0.040 44	0.007 68
2-4	17.842 84	3.071 03	0.028 97	0.000 55	0.060 16	0.069 18	0.000 79

原油浸泡对煤微观孔隙结构特征的影响研究

Effect of crude oil immersion on micropore structure of coal

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[5]	陈刘瑜, 李希建, 沈仲辉, 毕娟, 刘钰, 许石青. 贵州北部突出煤的孔隙结构及分形特征研究[J]. 中国安全科学学报, 2020, 30(2): 66-72.
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[7]	闫江伟, 薄增钦, 杨亚磊. 纳米级孔隙对构造煤吸附瓦斯能力的影响[J]. 中国安全科学学报, 2018, 28(10): 131-136.
[8]	卢平，鲍杰，沈兆武. 岩浆侵蚀区煤层孔隙结构特征及其对瓦斯赋存之影响分析[J]. 中国安全科学学报, 2001, 11(6): 41-.
[9]	孙文杰，张雪丽. 防毒面具用活性炭的结构与特性研究[J]. 中国安全科学学报, 1999, 9(2): 71-.