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超声波作用下页岩气渗流变化规律实验研究

An Experimental Study on Shale Gas Seepage under Ultrasonic Wave
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摘要 根据超声波具有机械振动、空化作用、热效应的特性,通过自行设计组装和改装现有实验装置相结合的方式,在频率为24 kHz条件下对新页HF-1井须5段第1-1、1-2、3-1和3-6号岩心进行了压力脉冲液测渗透率实验。实验数据经过数学解析得到相应岩心的渗透率,通过对比岩心在不加超声波和加超声波状态下的渗透率分析超声波对岩样渗透率的影响。实验结果表明,岩样在24 kHz的超声波作用下,岩样渗透率增大,并且其增加幅度与超声波功率成正比;超声波声强与渗透率比呈线性关系。实验证明,超声波能有效地提高岩样渗透率,对提高页岩气井产量具有一定的意义。 In order to verify the theory that ultrasonic can promote the adsorption and desorption of shale gas and improve the permeability of shale reservoir,according to the characteristics of ultrasonic with mechanical vibration,cavitation and thermal effect,through the combination of self-design,assembly and modification of existing experimental equipment,permeability experiments of shale pressure pulsed fluid were carried out on cores No.1-1,1-2,3-1 and 3-6 of the 5th member of XF-1 well in the condition of frequency of 24 kHz.The experimental data were mathematically analyzed to gotthe permeability of the corresponding core.The influence of ultrasonic wave on shale permeability was analyzed by comparing the permeability of the core without ultrasonic wave and the permeability of the core with ultrasonic wave.The experimental results show that the permeability of shale gas increases under the ultrasonic frequency of 24 kHz,and the increase amplitude is proportional to the ultrasonic power.There is a linear relationship between ultrasonic sound intensity and permeability ratio.It is proved that ultrasonic can effectively improve the permeability of shale,which has a certain significance to increase the production of shale gas well.
作者 张杰 王谣 李鑫 郑云东 李翠楠 杜肖潇 ZHANG Jie;WANG Yao;LI Xin;ZHENG Yundong;LI Cuinan;DU Xiaoxiao(State Key Laboratory of Oil and Gas Reservoir Geologyand Exploitation,Petroleum Engineering School,Southwest Petroleum University,Chengdu 610500,China;Exploration and Development Division,Petrochina Southwest Oil&Gasfield Company,Chengdu 610066,China;Engineering Technology Research Institute,Petrochina Southwest Oil&Gasfield Company,Guanghan 618300,Sichuan,China)
出处 《实验室研究与探索》 CAS 北大核心 2021年第12期46-50,共5页 Research and Exploration In Laboratory
基金 国家重点研发计划项目(2018YFC0310200) 国家自然科学基金面上项目(51274168) 西南石油大学研究生科研创新基金重点项目(2020CXZD30)。
关键词 渗流方式 超声波 压力脉冲瞬态法 渗透率 seepage mode ultrasound pressure pulse transient method permeability
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