王赞惟¹,孟尚志¹,张松航²,贾佳¹
WANG Zanwei¹, MENG Shangzhi¹, ZHANG Songhang², JIA Jia¹

• 1:中联煤层气有限责任公司，北京 100018
• 2:中国地质大学(北京)能源学院，北京 100083

摘要(Abstract)：

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。
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.

关键词(KeyWords)： 深部煤层;CO₂注入参数;水平井;数值模拟
deep coalbed;CO₂-injection parameters;horizontal well;simulation

Abstract:

Keywords:

基金项目(Foundation): 国家科技支撑计划项目（2014BAC18B03）

作者(Author): 王赞惟¹,孟尚志¹,张松航²,贾佳¹
WANG Zanwei¹, MENG Shangzhi¹, ZHANG Songhang², JIA Jia¹

DOI: 10.3969/j.issn.1001-1986.2018.05.029

参考文献(References)：

• [1] WHITE M,SMITH H D,JONES L K,et al. Sequestration of carbon dioxide in coal with enhanced coalbed methane recovery:A review[M]. Washington:American Chemical Society,2005.
  [2] PAN Z,CONNELL L D. Comparison of adsorption models in reservoir simulation of enhanced coalbed methane recovery and CO₂ sequestration in coal[J]. International Journal of Greenhouse Gas Control,2009,3:77-89.
  [3] PEKOT L J,REEVES S R. Modeling coal matrix shrinkage and differential swelling with CO₂ injection for enhanced coalbed methane recovery and carbon sequestration applications[R]. Washington,D C,2002:14-17.
  [4] SAWYER W K,PAUL G W,SCHRAUFNAGEK R A. Development and application of a 3-D coalbed simulator[J]. SPE Annual Technical Meeting,Calgary,Alberta,1990:SPE CIM/SPE90-119.
  [5] PALMER I,MANSOORI J. How permeability depends on stress and pore pressure in coalbeds:A new model[J]. SPE Reservoir Evaluation & Engineering,1998,12:539-544.
  [6] SHI J Q,DURUCAN S. Drawdown induced changes in permeability of coalbeds:A new interpretation of the reservoir response to primary recovery[J]. Transport in Porous Media,2004, 56:1-16.
  [7] ZHANG Xianmin, TONG Dengke. The coalbed methane transport model and its application in the presence of matrix shrinkage[J]. Science in China Series E:Technological Sciences,2008,51:968-974.
  [8] WONG S,LAW D,DENG X,et al. Enhanced coalbed methane and CO₂ storage in anthracitic coals:Micro-pilot test at south Qinshui,Shanxi,China[J]. International Journal of Greenhouse Gas Control,2007,1(2):215-222.
  [9] 宋革,朱炎铭,王阳,等. 徐州地区深部不可采煤层CO₂地质处置潜力分析[J]. 煤田地质与勘探,2014,42(4):15-19. SONG Ge,ZHU Yanming,WANG Yang,et al. Potential of carbon dioxide storage in deep unminable coalbeds in Xuzhou area[J]. Coal Geology & Exploration,2014,42(4):15-19.
  [10] 段鹏飞. CO₂-ECBM技术在河东煤田的潜力评估[J]. 煤田地质与勘探,2016,44(3):21-24. DUAN Pengfei. Potential assessment of CO₂-ECBM technique in Hedong coalfield[J]. Coal Geology & Exploration,2016, 44(3):21-24.
  [11] 唐书恒,汤达祯,杨起. 二元气体等温吸附实验及其对煤层甲烷开发的意义[J]. 地球科学——中国地质大学学报,2004, 29(2):219-223. TANG Shuheng,TANG Dazhen,YANG Qi. Binary-component gas adsorption isotherm experiments and their significance to exploitation of coalbed methane[J]. Earth Sciences——Journal of China University of Geosciences,2004,29(2):219-223.
  [12] 吴建光,叶建平,唐书恒. 注入CO₂提高煤层气产能的可行性研究[J]. 高校地质学报,2004,10(3):463-467. WU Jianguang,YE Jianping,TANG Shuheng. A feasibility study on CO₂ injection for enhancing the coalbed methane recovery[J]. Geological Journal of China Universities,2004,10(3):463-467.
  [13] 李士伦,张正卿,冉新权. 注气提高石油采收率技术[M]. 成都:四川科学技术出版社,2001:31-33.
  [14] 韩雪婷,张兵,叶建平. 煤层气藏CO₂-ECBM注入过程中CO₂相态变化分析及应用:以沁水盆地柿庄北区块为例[J]. 非常规油气,2018,5(1):80-85. HAN Xueting,ZHANG Bing,YE Jianping. Analysis and application of CO₂ phase change during CO₂-ECBM injection in CBM:Taking the study of Shizhuang north block in Qinshui basin as an example[J]. Unconventional Oil & Gas,2018,5(1):80-85.
  [15] 申建,秦勇,张春杰,等. 沁水盆地深煤层注入CO₂提高煤层气采收率可行性分析[J]. 煤炭学报,2016,41(1):156-161. SHEN Jian,QIN Yong,ZHANG Chunjie,et al. Feasibility of enhanced coalbed methane recovery by CO₂ sequestration into deep coalbed of Qinshui basin[J]. Journal of China Coal Society, 2016,41(1):156-161.
  [16] 赵金,张遂安,马东民,等. 注二氧化碳提高煤层气采收率数值模拟[J]. 天然气与石油,2012,30(1):67-70. ZHAO Jin,ZHANG Sui'an,MA Dongmin,et al. Numerical simulation study on carbon dioxide injection to enhance CBM recovery[J]. Natural gas and Oil,2012,30(1):67-70.
  [17] 张松航,唐书恒,潘哲军,等. 晋城无烟煤CO₂-ECBM数值模拟研究[J]. 煤炭学报,2011,36(10):1741-1747. ZHANG Songhang,TANG Shuheng,PAN Zhejun,et al. Numerical simulation of CO₂ enhanced coalbed methane recovery on Jincheng anthracite coal reservoir[J]. Journal of China Coal Society,2011,36(10):1741-1747.
  [18] 叶建平,张兵,韩学婷,等. 深煤层井组CO₂注入提高采收率关键参数模拟和试验[J]. 煤炭学报,2016,41(1):149-155. YE Jianping,ZHANG Bing,HAN Xueting,et al. Well group carbon dioxide injection for enhanced coalbed methane recovery and key parameter of the numerical simulation and application in deep coalbed methane[J]. Journal of China Coal Society,2016, 41(1):149-155.
  [19] 潘哲军,CONNELL L. 煤层气产量预测和矿区优化的储层模拟[J]. 中国煤层气,2006,3(3):27-31. PAN Zhejun,CONNELL L. Reservoir simulation for CBM/CMM production forecasting and field optimisation[J]. China Coalbed Methane,2006,3(3):27-31.
  [20] 雷东记. 煤储层增渗技术研究现状与展望[J]. 中国煤层气, 2010,7(3):8-10. LEI Dongji. Current status & prospect of study on techniques for enhancing permeability of coal reservoir[J]. China Coalbed Methane,2010,7(3):8-10.

文章评论(Comment)：