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Brittleness Evaluation of Glutenite Based On Energy Balance and Damage Evolution

Author

Listed:
  • Lianchong Li

    (Center of Rock Instability and Seismicity Research, School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China)

  • Mingyang Zhai

    (Center of Rock Instability and Seismicity Research, School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China)

  • Liaoyuan Zhang

    (Shengli Oilfield Branch Company, SINOPEC, Dongying 257000, China)

  • Zilin Zhang

    (Shengli Oilfield Branch Company, SINOPEC, Dongying 257000, China)

  • Bo Huang

    (Shengli Oilfield Branch Company, SINOPEC, Dongying 257000, China)

  • Aishan Li

    (Shengli Oilfield Branch Company, SINOPEC, Dongying 257000, China)

  • Jiaqiang Zuo

    (Shengli Oilfield Branch Company, SINOPEC, Dongying 257000, China)

  • Quansheng Zhang

    (Shengli Oilfield Branch Company, SINOPEC, Dongying 257000, China)

Abstract

Tight glutenite reservoirs are typically characterized by highly variable lithology and permeability, low and complex porosity, and strong heterogeneity. Glutenite brittleness is an essential indicator for screening fracture targets, selecting technological parameters, and predicting the hydraulic fracturing effect of tight glutenite reservoir exploitation. Glutenite formations with high brittleness are more likely to be effectively fractured and form complex fractures. Accurate evaluation of glutenite brittleness facilitates the recovery of oil and gas in a tight glutenite reservoir. Accordingly, two brittleness indexes are proposed in this paper based on energy balance and damage evolution analysis of complete stress–strain curves to evaluate the brittleness of glutenite. Uniaxial and triaxial compression tests of glutenite specimens were carried out and the brittleness indexes were verified by comparison with other existing indexes. The relationships between the mechanical properties and brittleness of glutenite under confining pressure were analyzed based on experimental results and the effects of mechanical and structural parameters on glutenite brittleness are investigated with a numerical approach. The brittleness of glutenite increases with the increase of gravel size and/or volume content. During hydraulic fracturing design, attention should be paid to the brittleness of the matrix and the size and content of gravel. This paper provides a new perspective for glutenite brittleness evaluation from the perspectives of energy dissipation and damage evolution. Our results provide guidance for fracturing layer selection and may also facilitate field operations of tight glutenite fracturing.

Suggested Citation

  • Lianchong Li & Mingyang Zhai & Liaoyuan Zhang & Zilin Zhang & Bo Huang & Aishan Li & Jiaqiang Zuo & Quansheng Zhang, 2019. "Brittleness Evaluation of Glutenite Based On Energy Balance and Damage Evolution," Energies, MDPI, vol. 12(18), pages 1-28, September.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:18:p:3421-:d:264453
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    References listed on IDEAS

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    1. Lianchong Li & Yingjie Xia & Bo Huang & Liaoyuan Zhang & Ming Li & Aishan Li, 2016. "The Behaviour of Fracture Growth in Sedimentary Rocks: A Numerical Study Based on Hydraulic Fracturing Processes," Energies, MDPI, vol. 9(3), pages 1-28, March.
    2. Xiaogui Zhou & Haiming Liu & Yintong Guo & Lei Wang & Zhenkun Hou & Peng Deng, 2019. "An Evaluation Method of Brittleness Characteristics of Shale Based on the Unloading Experiment," Energies, MDPI, vol. 12(9), pages 1-24, May.
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    Cited by:

    1. Cong, Ziyuan & Li, Yuwei & Pan, Yishan & Liu, Bo & Shi, Ying & Wei, Jianguang & Li, Wei, 2022. "Study on CO2 foam fracturing model and fracture propagation simulation," Energy, Elsevier, vol. 238(PB).
    2. Yuping Wang & Chunmei Dong & Chengyan Lin & Qingjie Hou, 2021. "The Main Controlling Factors of Glutenite Development and Their Impacts on Oil Energy Extraction," Energies, MDPI, vol. 14(7), pages 1-16, March.

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