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CO2注埋层类比实验材料变形性质研究

发表时间:2017-01-15  浏览量:1712  下载量:289
全部作者: 董研,刘卫群,桑盛,朱立
作者单位: 中国矿业大学力学与建筑工程学院;中国矿业大学深部岩土力学与地下工程国家重点实验室;西南科技大学土木工程与建筑学院
摘 要: 为通过相似模拟实验研究CO2注入煤层过程中储盖层的变形和应力场变化特征,需研究替代煤层的材料止水条(遇水膨胀橡胶)的吸水膨胀与煤吸附CO2膨胀之间的相关性。为此开展止水条完全浸水实验和无约束条件下止水条一端注水实验,并将止水条的吸水膨胀实验结果与已有的煤吸附CO2膨胀结果进行对比。结果表明,止水条吸水膨胀与煤层吸附CO2膨胀具有很好的正相关性,可以用止水条代替煤层,利用止水条吸水过程来模拟CO2注入煤层的过程,进而开展研究CO2注入煤层过程中储盖层的变形、应力变化规律的相似模拟实验,研究CO2煤层安全封存的相关条件。这对CO2煤层封存安全性研究具有一定的意义。
关 键 词: 固体力学;CO2煤层封存;吸附膨胀;变形;类比实验;相似材料
Title: Research of analogy experiment material deformation properties of CO2 injection buried layer
Author: DONG Yan, LIU Weiqun, SANG Sheng, ZHU Li
Organization: School of Mechanics and Civil Engineering, China University of Mining and Technology; State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology; School of Civil Engineering and Architecture, Southwest University of Science and Technology
Abstract: In order to study the reservoir caprock’s deformation and the variation characteristics of field of stress in the process of injecting CO2 to coal with the similar simulation experiment, it’s necessary to study the relativity of imbibitions of the water bar, which substitute for coal seam, and coal seam’s adsorption for CO2. To this end, experiments of full immersion and unconstrained condition end-to-end flood to water bar was carried out, and the results of experiments and the existing results of coal’s adsorption for CO2 were compared. The results demonstrate that there is a well positive correlation between imbibition of the water bar and the expansion of adsorption of coal seam for CO2, and it’s feasible to substitute the water bar for coal seam. The course of injecting of CO2 to coal seam was simulated by the course of water absorption of the water bar. The simulate experiments to research the changing rule of deformation and stress of reservoir cap when injecting CO2 to coal seam were carried out, and then the conditions of security of CO2 coal storage were studied. It is meaningful for researching the security of CO2 coal storage.
Key words: solid mechanics; CO2 seam sequestration; adsorption swelling; deformation; analogy experiment; similar materials
发表期数: 2017年1月第1期
引用格式: 董研,刘卫群,桑盛,等. CO2注埋层类比实验材料变形性质研究[J]. 中国科技论文在线精品论文,2017,10(1):58-62.
 
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