考虑支撑剂嵌入作用的煤岩渗透率模型

doi:10.16265/j.cnki.issn1003-3033.2019.11.003

中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (11): 14-19.doi: 10.16265/j.cnki.issn1003-3033.2019.11.003

考虑支撑剂嵌入作用的煤岩渗透率模型

李波波^1,2,3 副教授, 李建华¹, 杨康¹, 任崇鸿¹, 许江⁴ 教授

1 贵州大学矿业学院,贵州贵阳 550025;
2 贵州大学喀斯特山区优势矿产资源高效利用国家地方联合工程实验室,贵州贵阳 550025;
3 山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地,山东青岛 266590;
4 重庆大学煤矿灾害动力学与控制国家重点实验室,重庆 400044

收稿日期:2019-08-11 修回日期:2019-10-10 发布日期:2020-10-30
作者简介:李波波 (1985—),男,贵州修文人,博士,副教授,主要从事煤层气渗流、矿井灾害防治等方面的教学与研究工作。E-mail:bbli@gzu.edu.cn。
基金资助:
国家自然科学基金资助(51804085,51911530203);贵州省科技计划项目(黔科合平台人才[2018]5781号)。

Research on coal permeability model considering proppant embedding

LI Bobo^1,2,3, LI Jianhua¹, YANG Kang ¹, REN Chonghong¹, XU Jiang⁴

1 College of Mining, Guizhou University, Guiyang Guizhou 550025, China;
2 National Joint Engineering Laboratory for Utilization of Dominant Mineral Resources in Karst Mountain Area, Guizhou University, Guiyang Guizhou 550025, China;
3 State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao Shandong 266590, China;
4 State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China

Received:2019-08-11 Revised:2019-10-10 Published:2020-10-30

摘要/Abstract

摘要： 为研究煤层气抽采过程中支撑剂和应力耦合作用下的渗透率演化机制,利用吸附理论建立煤岩吸附变形方程,进一步构建考虑支撑剂和应力影响的渗透率模型,并通过试验数据验证其合理性。结果表明:煤岩吸附量与孔隙压力呈正相关的关系,其吸附变形也具有相同变化趋势;嵌入支撑剂的煤岩渗透率远大于常规储层,其中单层砂的增透效果最佳;随有效应力增大,煤岩渗透率呈指数函数形式减小;随孔隙压力的增大,煤岩渗透率呈先减小后趋于平缓的趋势;利用改进的理论模型拟合曲线,其中实测值与模型计算值基本吻合。

关键词: 支撑剂, 孔隙压力, 吸附模型, 煤岩, 渗透率

Abstract: In order to study permeability evolution mechanism under coupling effects of proppant and stress during coalbed methane extraction process, a coal adsorption deformation equation was established by using adsorption theory. Then, a permeability model considering proppant and stress was further constructed and verified through test data. The results show that coal adsorption and pore pressure is positively correlated and adsorption-induced deformation also has the same trend. Permeability of coal embedded in proppant is much greater than that in conventional reservoir, among which monolayer has the best anti-reflection effect. Coal permeability would decrease in form of an exponential function as effective stress increases, but will decrease first and then tend to change gently with the increase of pore pressure. Measured values are basically consistent with calculated values of an improved theoretical model as it is used to fit the curve.

Key words: proppant, pore pressure, adsorption model, coal, permeability

中图分类号:

X936

李波波, 李建华, 杨康, 任崇鸿, 许江. 考虑支撑剂嵌入作用的煤岩渗透率模型[J]. 中国安全科学学报, 2019, 29(11): 14-19.

LI Bobo, LI Jianhua, YANG Kang, REN Chonghong, XU Jiang. Research on coal permeability model considering proppant embedding[J]. China Safety Science Journal, 2019, 29(11): 14-19.

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考虑支撑剂嵌入作用的煤岩渗透率模型

Research on coal permeability model considering proppant embedding

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