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    Your Position :Home->Past Journals Catalog->2019 Vol.5

    Study on the Effect of Mechanical Vibration on Performance of the Cement Slurry
    Author of the article:Wang Youwen1, 2, Yuan Jinping1, Wang Zhaohui1, Yin Yiyong1, Wang Wei3
    Author's Workplace:CNPC Engineering Technology R & D Company Limited, Beijing, 102206, China; 2.College of Petroleum Engineering, China University of Petroleum (Beijing), Beijing, 102249, China; 3.Qinghai Oilfield Company No.5 Oil Production Plant, Haixi, 816400, China
    Key Words:Mechanical vibration; Performance of cement slurry; Micro-analysis; A new type of mould; Optimal range
    Abstract:

    It’s a common operation method in vibration cementing to oscillate cement slurry by mechanical means.And the method could improve the cementing quality effectively.In this paper, the mechanical vibration experiment system is used to study the effect of vibration on the properties of the cement slurry.The experimental results show that the mechanical vibration can improve the properties of the cement slurry significantly under the vibration frequency range of 6~21Hz, amplitude of 2.2mm and vibration duration of 5min.The fluidity index of the cement slurry increases by 7.20% and the consistency coefficient decreases by 23.47%.The rheological properties of the cement slurry are greatly improved, and the transition time and setting time of the static gel strength are reduced by 7.89% and 5.65% respectively.And the compressive strength of cement stone increases by 12.43%.At the same time, the scanning electron microscopy method and the mercury porosimetry method are used to analyze the microstructure from the qualitative and quantitative perspectives. It is verified that the vibration has a positive effect on the performance of the cement slurry.With the help of the self-designed new cement stone, a new conclusion is discovered that the homogeneity and stability of the cement slurry system will be disturbed after vibration.The strength volatility of the cement stone after vibration is about 6.62 times before the vibration.In addition, the best range of vibration wave action should be in the middle of the excitation point and the far end, which provides reference for the application of well cementing technology with mechanical vibration.

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