石油地质与工程2025，Vol.39Issue(5)：30-35,6.DOI:10.26976/j.cnki.sydz.202505006
疏松砂岩油藏临界速敏损害机理研究与应用
Research and application of critical velocity sensitive damage mechanism in unconsolidated sandstone reservoirs
摘要
Abstract
During the long-term water-flooding displacement process in unconsolidated sandstone reser-voirs,velocity sensitivity will occur,leading to changes in reservoir physical properties.Based on displace-ment experiments using formation water and refined silicone oil as displacement media on natural cores from Oilfield B,a quantitative evaluation was carried out on reservoir velocity sensitivity and critical damage radi-us.The experimental results show that:the degree of velocity sensitivity damage in Class Ⅰ and Class Ⅱreservoirs is weaker than that in ClassⅢreservoirs,and with the increase of crude oil viscosity,the degree of reservoir damage gradually increases.According to simulated formation water displacement experiments at different displacement velocities,the damage laws of cores at various displacement velocities were obtained.Through critical flow velocity conversion,the critical flow velocity for reservoir plugging was determined to be 6～10 m/d,and the sensitivity damage law of the reservoir was verified by single-well dynamic curves.Finally,based on the critical flow velocity during reservoir velocity sensitivity,calculations were carried out to determine that the single-well particle migration damage radius ranges from 0.19 to 1.89 meters,provi-ding a theoretical basis for the prevention and control of reservoir velocity sensitivity.关键词
疏松砂岩/速敏/临界流速/损害半径/驱油实验Key words
unconsolidated sandstone/velocity sensitivity/critical flow rate/damage radius/oil displace-ment experiment分类
能源科技引用本文复制引用
范佳乐,刘博伟,申春生,任帅,陈铭阳..疏松砂岩油藏临界速敏损害机理研究与应用[J].石油地质与工程,2025,39(5):30-35,6.基金项目
"十四五"重大科技专项"海上油田大幅度提高采收率关键技术"(KJGG2021-0501). （KJGG2021-0501）
