纳米级颗粒分散体的室内调驱性能评价
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1.中国石化江苏油田分公司;2.中国石油大学(华东)石油工程学院

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Evaluation of the Indoor Mobilization Performance of Nanoscale Particle Dispersions
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School of Petroleum Engineering, China University of Petroleum(East China)

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    摘要:

    调剖堵水是一种提高高含水油田水驱采收率的重要手段,颗粒堵剂作为一种重要的化学堵水剂被广泛应用,本文利用岩心驱替装置进行了自研纳米级油溶性树脂颗粒分散体调驱剂在岩心内流动以及封堵能力的相关测试,以驱替压力为指标,主要评价了油溶性树脂分散体调驱剂在地层内的注入性能及封堵性能。结果显示油溶性树脂分散体调驱剂具有良好的注入性能及封堵性能,油溶性树脂分散体的注入压力随着油溶性树脂的浓度增大而升高,并且随着地层渗透率的减小而增大,并且当树脂浓度为5%时,分散体系在不同渗透率地层中都具有良好的注入性能。油溶性树脂分散体对地层的封堵率随着油溶性树脂的浓度增大而增大,树脂浓度超过5%后封堵率基本保持不变,封堵率随着地层渗透率的减小而增大,并且在地层渗透率为30 mD以下时就具有较好的封堵效果。此外,油溶性树脂分散体在各个渗透率的地层中都具有较好的耐冲刷性能。

    Abstract:

    Dissection plugging is an important means to improve the recovery rate of water drive in high water content oilfield, and granular plugging agent is widely used as an important chemical plugging agent. In this paper, the flow of self-developed nano-sized oil-soluble resin particles dispersions of conditioning repellents in cores and their blocking ability were tested using a core replacement device. The injection performance and plugging performance of oil-soluble resin dispersions conditioning repellents within the formation were mainly evaluated using the replacement pressure as an index. The experimental results show that the oil-soluble resin dispersions conditioning repellents have good injection performance and blocking performance. As the concentration of the oil-soluble resin increases, the injection pressure of the oil-soluble resin dispersion rises. As the formation permeability decreases, the injection pressure of the oil-soluble resin dispersion increases. And when the resin concentration is 5%, the dispersion system has good injection performance in formations with different permeability. The blocking rate of oil-soluble resin dispersion on the ground layer increases with the increase of oil-soluble resin concentration, and the blocking rate remains basically unchanged when the resin concentration exceeds 5%. The blocking rate increases as the formation permeability decreases and provides a good blocking effect at formation permeabilities of 30 mD or less. In addition, the oil-soluble resin dispersions have good scour resistance in formations of all permeabilities. Keywords: nanoparticle dispersions; alternation experiment; profile control and water plugging; enhanced oil recovery

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  • 收稿日期: 2024-04-15
  • 最后修改日期: 2024-05-19
  • 录用日期: 2024-05-30
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