转向剂/乳化剂复合体系性能实验
DOI:
作者:
作者单位:

1.中海石油中国有限公司天津分公司 天津 塘沽;2.东北石油大学 提高油气采收率教育部重点实验室 黑龙江 大庆

作者简介:

通讯作者:

中图分类号:

基金项目:


Study on Compatibility and Liquid flow diversion of Particle Turning Agent and Heavy oil Emulsifier
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    针对渤海油藏稠油丰富、非均质性严重,水驱开发效果较差等问题,单独使用颗粒转向剂或稠油乳化剂提高采收率效果不理想,因此,研究稠油乳化剂及颗粒转向剂复合体系的性能具有重要意义。笔者利用室内评价的方法开展了对渤海LD5-2稠油油藏稠油乳化剂与聚合物微球和冻胶分散体等颗粒转向剂复配体系性能及转向效果的研究和机理分析。结果表明,聚合物微球初始粒径中值8.7~9.2μm,膨胀倍数2.5~3.0,冻胶分散体外观呈现不规则形态,缓膨效果不明显。转向剂颗粒吸附表面活性剂致使稠油乳化剂有效含量减少,乳化降黏效果变差,但当油与降黏体系的质量比在一定范围内仍具有较好的降黏效果。“稠油乳化剂/颗粒转向剂”二元复合体系中表面活性剂分子吸附在微球或冻胶分散体颗粒表面,颗粒间产生静电排斥作用,致使颗粒排列结构疏松。与单独使用颗粒转向剂相比,复合体系中的颗粒转向剂具有良好的抗剪切性、注入性及深部调驱能力。对于存在大孔道或特高渗透条带油藏,颗粒转向剂必须与强凝胶结合使用,发挥微观和宏观液流转向协同效应。

    Abstract:

    Aiming at the problems of rich heavy oil, serious heterogeneity and poor water drive development effect in Bohai reservoir, the effect of using particle diversion agent or heavy oil emulsifier alone to improve oil recovery is not ideal. Therefore, it is of great significance to study the performance of heavy oil emulsifier and particle diversion agent composite system. The performance of emulsifier, polymer microspheres and gel dispersions of heavy oil in LD5-2 heavy oil reservoir in Bohai Sea and the effect of liquid flow diversion were studied and analyzed by means of laboratory evaluation. The results show that the median initial particle size of polymer microspheres is 8.7~9.2 μm and the expansion ratio is 2.5~3.0. The dispersion of gelatin showed irregular morphology in vitro, and the effect of retarding swelling was not obvious. Adsorption of surfactant by steering agent particles reduces the effective content of heavy oil emulsifier and decreases the effect of emulsification and viscosity reduction, but the quality ratio of oil to viscosity reducing system still has good viscosity reduction effect in a certain range. Surfactant molecules are adsorbed on the surface of microspheres or gel dispersions in the binary system of "heavy oil emulsifier/particle diverter", resulting in electrostatic repulsion between particles, resulting in loose arrangement structure. Compared with using particle steering agent alone, the particle steering agent in the composite system has good shear resistance, injectability and deep profile control and displacement ability. For reservoirs with large channel or extra high permeability, granular diversion agents must be combined with strong gel to exert synergistic effect of micro and macro fluid diversion.

    参考文献
    相似文献
    引证文献
引用本文
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2022-04-02
  • 最后修改日期:2022-05-05
  • 录用日期:2022-05-16
  • 在线发布日期:
  • 出版日期:
点击这里给我发消息

点击这里给我发消息