不同阶煤超临界CO2驱替开采CH4实验研究

梁卫国, 张倍宁, 贺伟, 姚宏波

梁卫国, 张倍宁, 贺伟, 等. 不同阶煤超临界CO2驱替开采CH4实验研究[J]. 煤炭学报, 2020, 45(1): 197-203. DOI: 10.13225/j.cnki.jccs.YG19.1498
引用本文: 梁卫国, 张倍宁, 贺伟, 等. 不同阶煤超临界CO2驱替开采CH4实验研究[J]. 煤炭学报, 2020, 45(1): 197-203. DOI: 10.13225/j.cnki.jccs.YG19.1498
LIANG Weiguo, ZHANG Beining, HE Wei, et al. Experimental research on supercritical CO2 enhanced coalbed methane recovery in different rank coals[J]. Journal of China Coal Society, 2020, 45(1): 197-203. DOI: 10.13225/j.cnki.jccs.YG19.1498
Citation: LIANG Weiguo, ZHANG Beining, HE Wei, et al. Experimental research on supercritical CO2 enhanced coalbed methane recovery in different rank coals[J]. Journal of China Coal Society, 2020, 45(1): 197-203. DOI: 10.13225/j.cnki.jccs.YG19.1498

不同阶煤超临界CO2驱替开采CH4实验研究

Experimental research on supercritical CO2 enhanced coalbed methane recovery in different rank coals

  • 摘要: 我国不同变质程度的煤层中均蕴含大量的煤层气资源,注超临界CO2驱替煤层气是解决目前深部煤层气开发困难有效途径之一。为研究超临界CO2在不同变质程度煤体中驱替开采CH4的效果,利用尺寸为100 mm×100 mm×200 mm的原煤试件,在恒定的温压(50 ℃,25 MPa)条件下,以10 MPa超临界CO2驱替压力对4种不同变质程度的煤(弱黏煤、气煤、1/3焦煤和无烟煤)展开试验研究,结果表明:① 不同煤阶煤的孔隙发育程度和孔隙形态有较大差异,弱黏煤、气煤、1/3焦煤和无烟煤包含的主要孔隙类型分别为墨水瓶型孔隙、楔形孔/平行板孔、楔形孔/平行板孔、狭缝型孔,微孔的D-R(Dubinin-Radushkevich)比表面积为无烟煤>弱黏煤>气煤>1/3焦煤;② 煤渗透率受成矿地质环境和构造活动等导致的煤体结构、变质程度、裂隙发育程度、煤岩组成等多种因素的影响,在相同的有效应力下,4种测试煤样渗透率随变质程度升高而逐渐降低,驱替过程中CO2注入量也随变质程度升高而降低,在25 MPa围压、10 MPa注入压力条件下,弱黏煤、气煤、1/3焦煤和无烟煤的渗透率分别为4.58×10-18,2.75×10-18,0.91×10-18和0.05×10-18 m2,驱替实验结束时,CO2注入量分别为18.13,6.45,5.01和0.78 mol;③ 超临界CO2驱替效果与煤变质程度、渗透率和孔隙类型密切相关,4种煤试件的CH4产出率和CO2储存量均为气煤>1/3焦煤>弱黏煤>无烟煤。
    Abstract: Due to the difference in geological genesis and pore fissure structure,the permeability and the effect of enhanced coal bed methane recovery in different rank coals are variable. To study the effect of supercritical CO2 en- hanced CH4 recovery in different rank coals,some experiments were conducted in weakly caking coal,gas coal,1 / 3 coking coal and anthracite,respectively. Four coal specimens in the dimensions of 100 mm×100 mm×200 mm were in- vestigated at the temperature of 50 ℃ and the confining stress of 25 MPa. Supercritical CO2 injection pressure was maintained at 10. 0 MPa. The experimental results showed:① The pores configuration and porosity are different for the four different rank coals. The main pore type in the weakly caking coal is ink-bottle pore,anthracite is narrow -slit pore,while the pore types of gas coal and 1 / 3 coking coal are wedge pore or parallel plate pore. Anthracite and weakly caking coal have relatively high pore surface areas of 259. 651 0 m2 / g and 154. 066 9 m2 / g respectively,while gas coal and 1 / 3 coking coal have relatively low pore surface areas of 71. 235 9 m2 / g and 41. 420 1 m2 / g respective- ly. ② Coal permeability was affected by many factors such as coal structure,coal rank,fracture, coal composition, etc. ,due to ore-forming geological environment and tectonic activity. Permeabilities of four tested coal samples de- creased with the coal rank,and the permeabilities in weakly caking coal,gas coal,1 / 3 coking coal and anthracite were 4. 58×10-18 ,2. 75×10-18 ,0. 91×10-18 and 0. 05×10-18 m2 ,respectively at 10 MPa injection pressure. CO2 injection a- mounts decreased with coal rank,which were 18. 13,6. 45,5. 01 and 0. 78 mol in the weakly caking coal,gas coal,1 / 3 coking coal and anthracite,respectively. ③ The results of CH4 recovery rate and CO2 sequestrated volume show that gas coal is better than 1 / 3 coking coal,weakly caking coal and anthracite. The effect of supercritical CO2 enhanced CH4 recovery of gas coal and 1 / 3 coking coal with wedge pore or parallel plate pore,low surface area and medium per- meability is relatively good,which is a comprehensive expression of pore configuration,porosity and permeability in dif- ferent rank coals.
  • 期刊类型引用(14)

    1. 龚月,高和群,李小越,陈云燕. CO_2或N_2驱替煤中CH_4实验研究. 非常规油气. 2025(02): 82-88 . 百度学术
    2. 雷红艳. 真空充He法测定吸附罐剩余体积试验研究. 煤炭科学技术. 2024(S1): 86-93 . 百度学术
    3. 王磊,杨栋,邢俊旺. 超临界CO_2吸附引起煤体变形及吸附应力的研究. 东北大学学报(自然科学版). 2023(05): 726-734 . 百度学术
    4. 王梓良,桑树勋,周效志,刘旭东,张守仁. 构造裂隙对CO_2驱煤层气地质封存的影响. 煤炭学报. 2023(08): 3151-3161 . 本站查看
    5. 郑学召,吴朔,文虎,张铎,王宝元,闫兴. 不同温度压力下煤对CO_2吸附扩散规律研究. 煤矿安全. 2023(09): 60-65 . 百度学术
    6. 胡林杰,冯增朝,周动,王幸,石建行,沈永星,赵东. 煤层气原位注热开采的数值模拟研究及工程实践. 煤炭学报. 2023(12): 4473-4486 . 本站查看
    7. 郑锐,杨绮凡,邓广哲,潘甜,陈立,赵世振. 二氧化碳压裂液对煤体力学特性影响的试验研究. 科学技术与工程. 2023(36): 15440-15447 . 百度学术
    8. 何潇宁,何璇,贾潇,孙靖虎,殷佼龙,罗劼欣,邓宝康. 二氧化碳开发非常规能源研究进展. 现代化工. 2022(05): 40-44 . 百度学术
    9. 王满,姜永东,王英伟,李喜员,周凤. 煤吸附CH_4/CO_2混合气体的试验研究. 煤矿安全. 2022(05): 1-6+12 . 百度学术
    10. 张磊,李菁华,郭鲁成,曾世攀,李佳程. 含瓦斯烟煤CO_2置换吸附行为与形变特性研究. 中国矿业大学学报. 2022(05): 901-913 . 百度学术
    11. 李珍宝,王凤双,梁瑞,赵海章,马吉昊,魏高明. 液态CO_2驱替煤体CH_4的渗流特性及机制分析. 采矿与安全工程学报. 2022(06): 1265-1271 . 百度学术
    12. 朱川曲,马合意,赵鹏涛. 吸附CO_2煤体的力学性能劣化机制. 过程工程学报. 2022(12): 1676-1682 . 百度学术
    13. 范鹏鹏,芦升彦. 超临界CO_2强化开采煤层气研究进展. 当代化工. 2021(07): 1681-1684+1689 . 百度学术
    14. 张明杰,杨明鑫,闫江伟,解帅龙,梁锡明,李哲. 超临界状态下中高阶变质煤吸附甲烷特性研究. 中国安全科学学报. 2021(08): 53-61 . 百度学术

    其他类型引用(13)

图(1)
计量
  • 文章访问数:  715
  • HTML全文浏览量:  20
  • PDF下载量:  271
  • 被引次数: 27
出版历程
  • 网络出版日期:  2023-04-09

目录

    /

    返回文章
    返回
    x 关闭 永久关闭