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Effects of Curing Pressure on the Long-Term Strength Retrogression of Oil Well Cement Cured under 200 °C

Author

Listed:
  • Hongtao Liu

    (Oil and Gas Engineering Research Institute, PetroChina Tarim Oilfield Company, Korla 841000, China)

  • Jiankun Qin

    (School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Bo Zhou

    (Oil and Gas Engineering Research Institute, PetroChina Tarim Oilfield Company, Korla 841000, China)

  • Zhongfei Liu

    (Oil and Gas Engineering Research Institute, PetroChina Tarim Oilfield Company, Korla 841000, China)

  • Zhongtao Yuan

    (Oil and Gas Engineering Research Institute, PetroChina Tarim Oilfield Company, Korla 841000, China)

  • Zhi Zhang

    (Oil and Gas Engineering Research Institute, PetroChina Tarim Oilfield Company, Korla 841000, China)

  • Zhengqing Ai

    (Oil and Gas Engineering Research Institute, PetroChina Tarim Oilfield Company, Korla 841000, China)

  • Xueyu Pang

    (School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
    Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao 266580, China)

  • Xiaolin Liu

    (Supervision Center, PetroChina Tarim Oilfield Company, Korla 841000, China)

Abstract

The influences of curing pressure on the physical and mechanical property development of oil well cement during long-term curing were studied. Five silica-enriched cement slurries designed without and with reinforcement materials (latex fiber and nano-graphene) were autoclaved at 200 °C under two different pressures. The low pressure (50 MPa) curing was conducted for 2, 60, 90 and 180 days; the high pressure (150 MPa) curing was conducted for 2 and 360 days. The physical and mechanical properties of set cement were characterized by compressive strength, Young’s modulus, and water/gas permeability; the mineral composition and microstructure were determined by X-ray diffraction, mercury intrusion porosimetry, thermogravimetry and scanning electron microscope. Test results showed that high pressure (150 MPa) curing led to a more compact microstructure, which reduced the rate of strength retrogression in the long term. Samples with reinforcement materials, especially the latex fiber, showed higher compressive strength, Young’s modulus and lower permeability during long-term curing at both pressures.

Suggested Citation

  • Hongtao Liu & Jiankun Qin & Bo Zhou & Zhongfei Liu & Zhongtao Yuan & Zhi Zhang & Zhengqing Ai & Xueyu Pang & Xiaolin Liu, 2022. "Effects of Curing Pressure on the Long-Term Strength Retrogression of Oil Well Cement Cured under 200 °C," Energies, MDPI, vol. 15(16), pages 1-19, August.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:16:p:6071-:d:894170
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    Cited by:

    1. Ben Qi & Jiawen Fu & Jinfei Sun & Zaoyuan Li & Xin Yang & Fujie Yang & Xuning Wu, 2023. "Numerical Simulation on the Safety and Quality of Cementing by Using Pad Fluid in Horizontal Wells," Energies, MDPI, vol. 16(9), pages 1-15, April.

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