中国安全科学学报 ›› 2022, Vol. 32 ›› Issue (4): 113-121.doi: 10.16265/j.cnki.issn1003-3033.2022.04.017

• 安全工程技术 • 上一篇    下一篇

煤层注CO2驱替CH4影响因素试验研究

姜延航1,2(), 白刚1,2,3,**(), 周西华1,2, 王思琪1, 王连华1, 范超军4   

  1. 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 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
    3 华阳新材料科技集团有限公司,山西 阳泉 045000
    4 辽宁工程技术大学 矿业学院,辽宁 阜新 123000
  • 收稿日期:2021-12-14 修回日期:2022-03-21 出版日期:2022-04-28
  • 通讯作者:
    ** 白刚(1991—),男,安徽灵璧人,博士,副教授,主要从事矿井瓦斯与火灾防治方面的研究。E-mail:
  • 作者简介:

    姜延航 (1996—),男,辽宁凤城人,硕士研究生,主要研究方向为矿井火灾防治。E-mail:

    周西华, 教授。

    范超军, 副教授。

  • 基金资助:
    国家自然科学基金资助(52104195); 辽宁省教育厅青年项目(LJ2019QL002)

Experimental study on influence factors of CH4 displacement by CO2

JIANG Yanhang1,2(), BAI Gang1,2,3,**(), ZHOU Xihua1,2, WANG Siqi1, WANG Lianhua1, FAN Chaojun4   

  1. 1 College of Safety Science and Engineering, Liaoning Technical University, Huludao Liaoning 125105,China
    2 Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education, Liaoning Technical University, Huludao Liaoning 125105, China
    3 Huayang New Material Technology Group Co., Ltd., Yangquan Shanxi 045000,China
    4 College of Mining, Liaoning Technical University, Fuxin Liaoning 123000, China
  • Received:2021-12-14 Revised:2022-03-21 Published:2022-04-28

摘要:

为明确多因素耦合对CO2驱替CH4过程中CH4产出与CO2封存效果的影响特征,开展不同注气温度θ、压力P和煤样含水率W条件下注CO2驱替CH4试验,研究分析不同条件下CH4产出率η和CO2储存率ξ变化特性,基于响应曲面法,构建ηξ二次回归响应曲面模型,分别考察注气温度A、注气压力B、含水率Cηξ的单独影响及各因素间的交互作用。结果表明:ηθP增加而增大,随W增大而减小;ξP增大而增大,随θW增加而减小。影响因素中ABC均为η的显著项,BCξ的显著项,一次项对ηξ影响程度均为C>B>A;交互项对η的影响程度为BC>AC>AB,且ACBC交互作用显著,AB交互作用不显著;交互项对ξ的影响程度为AB>AC>BC, 且ABAC交互作用极显著,BC交互作用不显著;4组ηξ编码区间外试验值与模型预测值平均偏差分别为3.64%、2.605%。

关键词: CO2驱替CH4, CH4产出率, CO2储存率, 影响因素, 交互作用

Abstract:

In order to study influence of multi-factor coupling on CH4 production and CO2 sequestration effect in the process of CH4 displacement by CO2, displacement experiment was carried out under conditions of different gas injection temperature(θ), pressure (P) and water content of coal samples (W). Variation characteristics of CH4 output rate (η) and CO2 storage rate (ξ) under different conditions were researched and analyzed. Then, η and ξ quadratic regression response surface models were built based on response surface methodology, separate influence of gas injection temperature (A), gas injection pressure (B) and moisture content (C) on η and ξ and interaction between each factor were investigated. The results show that η increases along with increase of θ and P, while decreases with that of W. ξ increases with increase of P, while decreases with that of θ and W. Among all influencing factors, A, B, and C are significant terms of η, B and C are those of ξ, and influence degree of primary term on η and ξ is C>B>A. That of interaction term on η is: BC>AC>AB, and the interaction between AC and BC is significant, while AB interaction is not. Influence degree of interaction term on ξ is AB>AC>BC, and interaction between AB and AC is extremely significant, while that between BC is not. The average deviations between experimental values outside coding interval of η and ξ of the 4 groups and predicted values of the model are 3.64% and 2.605%, respectively.

Key words: CH4 displacement by CO2, CH4 output rate, CO2 storage rate, influencing factors, Interaction