微波加热油页岩储层的热响应  

Thermal Response of Microwave Heating in Oil Shale Reservoirs

作　　者：程瑶 陆丹丹[2] 赵龙飞 Cheng Yao;Lu Dandan;Zhao Longfei(College of Innovation and Practice,Liaoning Technical University,Fuxin 123000,Liaoning,China;School of Mechanics and Engineering,Liaoning Technical University,Fuxin 123000,Liaoning,China;Engineering Technology Research Institute of CNPC Xibu Drilling Engineering Co.,Ltd.,Karamay 834000,Xinjiang,China)

机构地区：[1]辽宁工程技术大学创新实践学院,辽宁阜新123000 [2]辽宁工程技术大学力学与工程学院,辽宁阜新123000 [3]中国石油集团西部钻探工程有限公司工程技术研究院,新疆克拉玛依834000

出　　处：《吉林大学学报(地球科学版)》2025年第2期387-400,共14页Journal of Jilin University:Earth Science Edition

基　　金：辽宁省教育厅项目(LJKZ0360);辽宁省应用基础研究计划项目(2022JH2/101300136);国家重点研发计划项目(2019YFA0705501)。

摘　　要：微波加热技术作为传统加热方法的替代方案,在油页岩原位开采中备受关注。为了研究微波辐射下油页岩的升温变化过程、孔隙度及渗透率的变化规律、内部位移等热响应,采用COMSOL Multiphysics软件,基于耦合的三维电磁-热-渗流-固体力学模型进行了数值模拟。结果表明:微波加热条件下,油页岩储层的温度上升迅速,且随着功率增加,升温速度显著提高;不同功率下,储层达到热解温度所需的时间存在明显差异,800 W微波功率作用下油页岩升温最快。随着加热时间的延长,孔隙度和渗透率逐渐提高,尤其是在高功率下,其增长幅度更为显著;微波辐照第500天时不同功率下的油页岩平均渗透率均达到峰值,在800 W时渗透率达到了1.93×10^(-16) m^(2)。微波加热导致了力学性质的削弱和地层损伤的增加,当微波辐射功率为800 W时出现油页岩最大位移3.8 cm。综合来看,微波功率设置为600 W时,可显著提升微波热解油页岩储层的工程应用效果。Microwave heating technology as an alternative to conventional heating methods in oil shale exploitation microwave heating technology has gained significant attention as an alternative to traditional heating methods in the exploitation of oil shale reserves.In order to investigate the thermal response of oil shale under microwave radiation,as well as the changes in porosity,permeability,and internal displacement,numerical simulations were conducted using COMSOL Multiphysics software.These simulations were based on a coupled 3D electromagnetic-thermal-permeability-solid mechanics model.The results revealed the following key findings:Under microwave heating conditions,the temperature of the oil shale reservoir increases rapidly.Moreover,as the microwave power increases,the rate of temperature rise significantly accelerates.Different power levels result in distinct timeframes required for the reservoir to reach its pyrolysis temperature,with the fastest heating occurring at 800 W microwave power.With prolonged heating,porosity and permeability gradually increase,especially at higher power levels,where the growth is more pronounced.At the 500 th day of microwave irradiation,the average permeability of oil shale reached its peak under different power levels,with a permeability of 1.93×10^(-16) m^(2) observed at 800 W.Microwave heating leads to the weakening of mechanical properties and increased formation damage in the reservoir.When the microwave radiation power reaches 800 W,the maximum displacement reaches 3.8 cm.In summary,selecting a microwave power of 600 W demonstrates significant engineering application benefits for the in-situ pyrolysis of oil shale reservoirs.

关 键 词：油页岩 微波加热 储层 数值模拟 原位开采 

分 类 号：TE662[石油与天然气工程—油气加工工程] P618.13[天文地球—矿床学]