Journal of Jilin University(Earth Science Edition) ›› 2021, Vol. 51 ›› Issue (3): 815-824.doi: 10.13278/j.cnki.jjuese.20190319

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Experiment on the Optimization of Grouting Sealing Slurry and Its Anti-Seepage Effect in Oil Shale In-Situ Production Area

Chen Chen1,2, Zhang Ying1,2, Zhu Jiang3, Zhu Ying1,2, Zhai Lianghao1,2, Shen Guojun1,2, Pan Dongbin1,2   

  1. 1. College of Construction Engineering, Jilin University, Changchun 130026, China;
    2. Key Laboratory of Drilling and Exploitation Technology in Complex Conditions, Ministry of Natural Resources, Changchun 130026, China;
    3. CCCC First Harbor Consultants Co., Ltd, Tianjin 300222, China
  • Received:2019-12-28 Online:2021-05-26 Published:2021-06-07
  • Supported by:
    Supported by the National Natural Science Foundation of China (41672361,41876218) and the Project of Department of Science and Technology of Jilin Province (SXGJSF2017-5)

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Abstract: To improve the transformation efficiency of oil shale in-situ exploration and reduce the pollution of pyrolysis products, a method of sealing production areas,namely grouting technology, is introduced. Taking the geological conditions of Fuyu oil shale as an example, the optimum formulation of grout and its sealing effect in oil shale production area are determined. Based on the orthogonal test, the viscosity of grout is set as the main evaluation index, and the optimized formula of grout is water cement ratio of 0.85, sodium bentonite of 4.0%, silica powder of 6.0%, and poly-carboxylic acid super-plasticizer of 0.5%. In order to verify the sealing effect of the optimized grout, the permeability changes of the oil shale samples filled or not filled with the grout were compared and analyzed. When the confining pressure is equal to the in-situ stress of Fuyu oil shale, the permeability of all filling grouts samples is all about 0.1×10-3 μm2, which is much lower than that of the samples without the grout, indicating that the optimized grout can seal the fractures successfully.

Key words: oil shale, grouting, orthogonal test, formulation optimization, anti-seepage treatment

CLC Number: 

  • TQ172.44
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