摘要
为研究单轴受载煤体压裂后煤体复电阻参数变化关系,在实验室搭建受载煤体的水力压裂变频复电阻率测试平台进行实验,对受载煤体进行压裂前后复电性测试。运用电介质极化理论和激发极化理论,分析煤的水力压裂复电阻率频散机理。结果表明,压裂前煤体复电阻率实部、虚部均随频率变化而变化;复电阻实部整体呈现“三段式”趋势,虚部呈“U”型,趋势略有不同;煤体电容随着频率的增大而减小。压裂后复电阻率虚部呈现“阶梯状”,实部呈现“持续下降”的趋势,不论压裂前还是压裂后,煤体电容都随着频率的增大而减小;压裂后的煤体在含水状态下其虚部呈现“单边上升”,其物理机制是空间电荷积聚效应产生的。
In order to study the relation between the complex resistivity parameters of loaded coal body after fracturing of single-axis coal body,a hydraulic-pressure fission frequency complex resistivity test platform was set up in the laboratory to test the fracturing properties of loaded coal body before and after fracturing.Using dielectric polarization theory and excitation polarization theory to analyze the mechanism of complex resistivity dispersion of coal hydraulic fracturing.The results show that the complex resistivity real part of loaded coal body before fracturing is hanged with frequency.Complex resistivity real part presents the"three-stage"trend,the imaginary part is"U"type,the trend is slightly different.Coal capacitance decreases with increasing frequency.After fracturing the complex resistivity of the imaginary part presents"step-like,"the real part presents"continuous decline"trend,whether before or after fracturing,coal capacitance decreases with increasing frequency.After fracturing the coal body in the water state of its imaginary"unilateral rise,"its physical mechanism is generated by the space charge accumulation effect.
作者
陈鑫源
李鹏
雷东记
王平
贾子强
Chen Xinyuan;Li Peng;Lei Dongji;Wang Ping;Jia Ziqiang(Henan Coal Science Research Institute Co.,Ltd.,Zhengzhou 450001,China;Wudong Coal Mine,National Energy Group Xinjiang Energy Co.,Ltd.,Urumqi 830000,China;State Key Laboratory Cultivation Base for Gas Geology and Gas Control,Henan Polytechnic University,Jiaozuo 454000,China;Henan Province Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region,Henan Polytechnic University,Jiaozuo 454000,China;School of Resource&Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)
出处
《能源与环保》
2023年第5期26-31,共6页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
基金
国家自然科学基金青年基金资助项目(51704101)
河南省高等学校重点科研项目(22A440003)
河南省高校基本科研业务费专项资金资助项目(NSFRF200307)。
关键词
受载煤体
水力压裂
复电阻率
电容
loaded coal body
hydraulic fracturing
complex resistivity
capacitance
