|本期目录/Table of Contents|

[1]韩光,付志豪,白刚,等.CO2注气压力对CH4驱替特性影响实验研究*[J].中国安全生产科学技术,2022,18(8):85-90.[doi:10.11731/j.issn.1673-193x.2022.08.013]
 HAN Guang,FU Zhihao,BAI Gang,et al.Experimental study on influence of COCO2 injection pressure on CHCO4 displacement characteristics[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2022,18(8):85-90.[doi:10.11731/j.issn.1673-193x.2022.08.013]
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CO2注气压力对CH4驱替特性影响实验研究*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
18
期数:
2022年8期
页码:
85-90
栏目:
职业安全卫生管理与技术
出版日期:
2022-08-31

文章信息/Info

Title:
Experimental study on influence of COCO2 injection pressure on CHCO4 displacement characteristics
文章编号:
1673-193X(2022)-08-0085-06
作者:
韩光付志豪白刚周西华韩明旭王学鹏杨洪涛
(1.辽宁工程技术大学 安全科学与工程学院,辽宁 葫芦岛 125105;
2.华阳新材料科技集团有限公司,山西 阳泉 045000;
3.辽宁工程技术大学 矿山热动力灾害与防治教育部重点实验室,辽宁 葫芦岛 125105)
Author(s):
HAN Guang FU Zhihao BAI Gang ZHOU Xihua HAN Mingxu WANG Xuepeng YANG Hongtao
(1.College of Safety Science and Engineering,Liaoning Technical University,Huludao Liaoning 125105,China;
2.Huayang New Material Technology Group Co.,Ltd.,Yangquan Shanxi 045000,China;
3.Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education,Liaoning Technical University,Huludao Liaoning 125105,China)
关键词:
不同注气压力气体解吸特性突破时间置换效率驱替比渗透率
Keywords:
different gas injection pressures gas desorption characteristics breakthrough time displacement efficiency displacement ratio permeability
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2022.08.013
文献标志码:
A
摘要:
为研究CO2驱替CH4过程中注气压力对气体解吸特性的影响,采用自主搭建的驱替实验平台,在0.6,0.8,1.0 MPa不同注气压力下进行驱替实验,研究CO2驱替CH4过程中煤层温度、气体浓度、置换效率和渗透率等变化规律。实验结果表明:提高CO2注气压力可提高CO2置换驱替煤层CH4的效果。随着注气压力增大,CH4累计解吸量增大,CO2突破时间越短,CO2封存量越大,置换效率升高,驱替比下降。注气压力为0.6,0.8,1.0 MPa时,CH4累计解吸量分别为90.2,94.1,97.8 L;CO2封存量分别为19.73,19.92,20.21 mL/g;置换效率由76.9%上升到80.2%再到82.9%,驱替比由3.28下降到3.17再到3.09。注气驱替CH4过程中煤层温度升高,可分为低速升温、高速升温和趋于平缓阶段。煤层温度最高变化量分别为9.4,11.5,12.7 ℃。同一注气压力下,煤层渗透率变化可分为缓慢增长、急剧下降和趋于稳定阶段。
Abstract:
In order to study the influence of gas injection pressure on the gas desorption characteristics during the process of CO2 displacement for CH4,the displacement experiments were carried out under different gas injection pressures of 0.6 MPa,0.8 MPa and 1.0 MPa by using the self-built displacement test platform,and the variation laws of coal seam temperature,gas concentration,displacement efficiency and permeability during the process of CO2 displacement for CH4.The experimental results showed that increasing the CO2 injection pressure could improve the effect of CO2 displacement for CH4 in the coal seam.With the increase of gas injection pressure,the cumulative desorption amount of CH4 increased,the shorter the CO2 breakthrough time,the larger the CO2 storage amount,the displacement efficiency increased,and the displacement ratio decreased.When the gas injection pressure was 0.6,0.8,1.0 MPa,the cumulative desorption amount of CH4 was 90.2,94.1,97.8 L,respectively,and the CO2 storage amount was 19.73,19.92,20.21 mL/g,respectively.The displacement efficiency increased from 76.9% to 80.2% and then to 82.9%,and the displacement ratio decreased from 3.28 to 3.17 and then to 3.09.The temperature of coal seam in the process of gas injection displacement for CH4 increased,which could be divided into the low speed temperature rise stage,high speed temperature rise stage and tending to be gentle stage.The maximum variation of coal seam temperature was 9.4,11.5,12.7 ℃,respectively.Under the same gas injection pressure,the change of coal seam permeability could be divided into the slow growth stage,sharp decline stage and tending to be stable stage.

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备注/Memo

备注/Memo:
收稿日期: 2021-04-27;网络首发日期: 2021-11-22
* 基金项目: 辽宁省教育厅青年项目(LJ2019QL002);辽宁工程技术大学学科创新团队项目(LNTU20TD-29);辽宁省‘兴辽英才计划’项目(XLYC2008021)
作者简介: 韩光,博士,副教授,主要研究方向为矿山安全。
通信作者: 付志豪,硕士研究生,主要研究方向为矿井瓦斯防治。
更新日期/Last Update: 2022-09-19