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Waterflooding Huff-n-puff in Tight Oil Cores Using Online Nuclear Magnetic Resonance

Author

Listed:
  • Ting Chen

    (School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
    Institute of Porous Flow and Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China
    PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China)

  • Zhengming Yang

    (Institute of Porous Flow and Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China
    PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China)

  • Yunhong Ding

    (Institute of Porous Flow and Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China
    PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China)

  • Yutian Luo

    (School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
    Institute of Porous Flow and Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China
    PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China)

  • Dan Qi

    (School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
    Institute of Porous Flow and Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China
    PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China)

  • Wei Lin

    (School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
    Institute of Porous Flow and Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China
    PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China)

  • Xinli Zhao

    (School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
    Institute of Porous Flow and Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China
    PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China)

Abstract

Given the difficulty in developing waterflooding in tight oil reservoirs, using waterflooding huff-n-puff is an effective method to improve oil recovery. Online nuclear magnetic resonance (NMR) can detect the change in internal oil and water during the core displacement process, and magnetic resonance imaging (MRI) in real time. To improve the tight oil reservoir development effectiveness, cores with different permeability were selected for a waterflooding huff-n-puff experiment. Combined with online NMR equipment, the fluid saturation, recovery rate, and residual oil distribution were studied. The experiments showed that, for tight oil cores, more than 80% of the pores were sub-micro- and micro-nanopores. More than 77.8% of crude oil existed in the sub-micro- and micropores, and movable fluids mainly existed in the micropores with a radius larger than 1 μm. The NMR data and the MRI images both demonstrated that the recovery ratio of waterflooding after waterflooding huff-n-puff was higher than that of conventional waterflooding, and, therefore, residual oil was lower. Choosing two cycles’ of waterflooding, huff-n-puff was more suitable for tight oil reservoir development. The production of crude oil increased by 22.2% in the field pilot test, which preliminarily proved that waterflooding huff-n-puff was suitable for tight oil reservoirs.

Suggested Citation

  • Ting Chen & Zhengming Yang & Yunhong Ding & Yutian Luo & Dan Qi & Wei Lin & Xinli Zhao, 2018. "Waterflooding Huff-n-puff in Tight Oil Cores Using Online Nuclear Magnetic Resonance," Energies, MDPI, vol. 11(6), pages 1-14, June.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:6:p:1524-:d:151950
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    References listed on IDEAS

    as
    1. Shuai Li & Jun Tang & Yunhong Ding & Shimin Liu & Guangfeng Liu & Bo Cai, 2017. "Recovery of Low Permeability Reservoirs Considering Well Shut-Ins and Surfactant Additivities," Energies, MDPI, vol. 10(9), pages 1-14, August.
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    Cited by:

    1. Zhang, Xiang & Wei, Bing & You, Junyu & Liu, Jiang & Wang, Dianlin & Lu, Jun & Tong, Jing, 2021. "Characterizing pore-level oil mobilization processes in unconventional reservoirs assisted by state-of-the-art nuclear magnetic resonance technique," Energy, Elsevier, vol. 236(C).
    2. Kun Qian & Shenglai Yang & Hongen Dou & Qian Wang & Lu Wang & Yu Huang, 2018. "Experimental Investigation on Microscopic Residual Oil Distribution During CO 2 Huff-and-Puff Process in Tight Oil Reservoirs," Energies, MDPI, vol. 11(10), pages 1-16, October.
    3. Chaohui Lyu & Qing Wang & Zhengfu Ning & Mingqiang Chen & Mingqi Li & Zhili Chen & Yuxuan Xia, 2018. "Investigation on the Application of NMR to Spontaneous Imbibition Recovery of Tight Sandstones: An Experimental Study," Energies, MDPI, vol. 11(9), pages 1-12, September.
    4. Ting Chen & Zhengming Yang & Yutian Luo & Wei Lin & Jiaxiang Xu & Yunhong Ding & Jialiang Niu, 2018. "Evaluation of Displacement Effects of Different Injection Media in Tight Oil Sandstone by Online Nuclear Magnetic Resonance," Energies, MDPI, vol. 11(10), pages 1-16, October.

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