4.7 Article

Thermo-hydro-mechanical-chemical couplings controlling CH4 production and CO2 sequestration in enhanced coalbed methane recovery

期刊

ENERGY
卷 173, 期 -, 页码 1054-1077

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2019.02.126

关键词

Coalbed methane; CO2 sequestration; Enhanced CBM recovery (ECBM); Binary gas transport; Thermo-hydro-mechanical-chemical model (THMC); Injection start time

资金

  1. State Key Research Development Program of China [2016YFC0801407-2]
  2. National Natural Science Foundation of China [51674132, 51874159]
  3. State Key Laboratory of Coal Resources and Safe Mining, CUMT [SKLCRSM15KF04]
  4. State Key Laboratory Cultivation Base for Gas Geology and Gas Control (Henan Polytechnic University) [WS2018B05]
  5. Key Laboratory of Liaoning Provincial Education Department [LJZS004]
  6. China Scholarship Council (CSC) [201708210251]

向作者/读者索取更多资源

We explore the fully coupled thermo-hydro-mechanical-chemical (THMC) response of CO2 enhanced CBM recovery (CO2-ECBM) considering the coupling relationships of competitive sorption of binary gas and dissolved gas in water (C), gas and water transport in two phase flow (H), thermal expansion and non-isothermal gas sorption (T), and coal deformation (M). The THMC model is developed, validated then applied to simulate CO2 enhanced recovery. Parametric studies are completed, systematically switching-off components of the thermal (T) and hydraulic (H) coupling, to provide insights into key processes controlling ECBM recovery and key factors. The evolution of permeability is strongly dependent on coal matrix swelling/shrinkage induced by gas adsorption/desorption, expansion by thermal effects, and compaction by effective stress. Reservoir permeability first decreases, then rebounds before continuously decreasing to low magnitude. Ignoring the impact of water migration overestimates CH4 production, and ignoring heat transfer underestimates. The high injection pressure and initial permeability will promote fluid mixture transport, resulting in an increase in production and sequestration; conversely, high injection temperature and water saturation will result in a decrease. Delaying injection start time is shown to counter the low average production rate and early CO2 breakthrough resulting from early injection (beginning at similar to 2500 days for this case). (C) 2019 Elsevier Ltd. All rights reserved.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据