王赞惟, 孟尚志, 张松航, 贾佳. 沁水盆地柿庄北深部煤层水平井CO2注入参数研究[J]. 煤田地质与勘探, 2018, 46(5): 188-192. DOI: 10.3969/j.issn.1001-1986.2018.05.029
引用本文: 王赞惟, 孟尚志, 张松航, 贾佳. 沁水盆地柿庄北深部煤层水平井CO2注入参数研究[J]. 煤田地质与勘探, 2018, 46(5): 188-192. DOI: 10.3969/j.issn.1001-1986.2018.05.029
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WANG Zanwei, MENG Shangzhi, ZHANG Songhang, JIA Jia. CO2-injection parameters in horizontal well of deep coalbed in north Shizhuang block of Qinshui basin[J]. COAL GEOLOGY & EXPLORATION, 2018, 46(5): 188-192. DOI: 10.3969/j.issn.1001-1986.2018.05.029
Citation: WANG Zanwei, MENG Shangzhi, ZHANG Songhang, JIA Jia. CO2-injection parameters in horizontal well of deep coalbed in north Shizhuang block of Qinshui basin[J]. COAL GEOLOGY & EXPLORATION, 2018, 46(5): 188-192. DOI: 10.3969/j.issn.1001-1986.2018.05.029
shu

沁水盆地柿庄北深部煤层水平井CO2注入参数研究

CO2-injection parameters in horizontal well of deep coalbed in north Shizhuang block of Qinshui basin

    摘要
  • 摘要: 基于CO2的吸附能力大于CH4的原理，向深部煤层中注入并封存CO2同时置换驱替CH4增加煤层气井产量，具有环境和经济双重效益。研究深部煤储层特征，通过气、水两相多组分，单孔和双孔模型的三维储层数值模拟技术，模拟不同井底压力下，完成注入量所需要的时间。优化后的注入施工参数为井口注入压力低于10MPa，注入速率低于47 L/min。根据数值模拟结果选定注入压力，注入结果与模拟连续注入时间一致，说明该方法可以有效地模拟注入压力和注入量之间的关系，保障CO2注入施工安全有效。

     

    Abstract: Based on the principle that CO2 adsorption capacity is greater than CH4 adsorption capacity, CO2 is injected and stored in deep coal seams, CO2 replaces CH4 to increase CBM production, having environmental and economical benefits. By using dual-porosity, two-phase model was established with the help of CBM reservoir simulation method, then the time of CO2-injection with different pressures was studied. Injection pressure needs fracturing pressure lower than 10 MPa, and the injection rate is less than 47 L/min. Numerical simulation results are in good agreement with the experimental data given in this paper, show that the method is effective.

     

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