Lithologic Reservoirs ›› 2021, Vol. 33 ›› Issue (4): 176-184.doi: 10.12108/yxyqc.20210419

• PETROLEUM ENGINEERING • Previous Articles    

Effect of mechanical properties of pre-crosslinked gel particles on micro migration and plugging

LUO Xiangrong1,2, ZHAO Bo3, REN Xiaojuan1,2, WEI Jing3, ZHANG Zhenzhen3, WANG Ganggang1,2, ZHOU Hangxuan1,2   

  1. 1. Engineering Research Center of Development and Management for Low to Extra-Low Permeability Oil & Gas Reservoirs in West China, Ministry of Education, Xi'an Shiyou University, Xi'an 710065, China;
    2. School of Petroleum Engineering, Xi'an Shiyou University, Xi'an 710065, China;
    3. Xinjiang Keli New Technology Development Co., Ltd., Karamay 834000, Xinjiang, China
  • Received:2021-01-11 Revised:2021-04-13 Online:2021-08-01 Published:2021-08-06

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Abstract: The migration and plugging characteristics of pre-crosslinked gel particles in porous media are the key factors affecting their deep profile control performance. At present,how the mechanical properties of gel particles affect their micro migration and plugging characteristics is not well understood. For the collected three kinds of pre-crosslinked gel particles,the elastic modulus analysis method based on image acquisition technology was used to study the elastic deformation ability of gel particles for the first time,and the influence of the mechanical properties of the gel particles on the micro migration and plugging was analyzed by the experiment of visual microscopic model filled with sands. The results show that No. 1 gel particle with high compressive strength and strong toughness is not easy to be broken. It has some elastic deformation ability,and its plugging capacity is strong and injection capacity is poor. No. 3 gel particle is characterized by moderate compressive strength,strong brittleness, poor elastic deformation ability,strong injection capacity and poor thus plugging capacity. No. 6 gel particle is characterized by poor compressive strength,small elastic factor,good plugging effect and injectability. This study can provide theoretical guidance and technical support for the evaluation of deep profile control performance and optimization of pre-crosslinked gel particles.

Key words: gel particles, mechanical properties, microscopic migration, plugging, elasticity

CLC Number: 

  • TE357
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