摘要
以胡尖山长9油藏为例,选用含仲胺基团的阳离子黏土稳定剂FCM-1,通过制备人工岩心并模拟储层注水冲刷条件,分析了欠注原因、动态耐冲刷性能及适用条件;并结合黏土矿物粒径分布和SEM表征,探讨了黏土稳定剂的作用机理。实验结果表明,平均水敏损害率为62.5%,属于中等偏强程度,是欠注的主要原因;在注入5 PV的3.0%(w)FCM-1后,经历20 PV注入水驱,相较原始水敏损害率降低了21.2%,显示出良好的耐冲刷性;通过二分法确定了3.0%(w)FCM-1的限制流速为2.74 cm^(3)/min;低含量FCM-1主要通过电性中和作用发挥效果,而高含量FCM-1则通过吸附层包覆和空间位阻作用,提高团聚体致密度,增强颗粒迁移阻力并降低孔喉堵塞风险。
The Chang 9 reservoir in Hujianshan was taken as an example and the cationic clay stabilizer FCM-1 containing secondary amine groups was selected.Artificial cores were prepared to simulate reservoir water flooding conditions.The causes of under-injection,dynamic erosion resistance,and applicable conditions were analyzed.Combined with clay mineral particle size distribution and scanning electron microscopy characterization,the mechanism of clay stabilizer was explored.The result indicates that the average water sensitivity damage rate reaches 62.5%,classified as moderate-to-strong intensity,which constitutes the primary cause of under-injection.After injecting 5 PV of 3.0%(w)FCM-1,followed by 20 PV of water flooding,the water sensitivity damage rate is 21.2%lower than the original,demonstrating excellent erosion resistance.The bisection method determines the velocity limit for 3.0%(w)FCM-1 as 2.74 cm³/min.Low-concentration FCM-1 primarily functions through charge neutralization,while the high-concentration enhances aggregate density through adsorption layer coating and steric hindrance effects,thereby improving particle migration resistance and reducing pore throat blockage risks.
作者
张加敏
甄恩龙
张光明
胡磊
姜顺东
陈立峰
ZHANG Jiamin;ZHEN Enlong;ZHANG Guangming;HU Lei;JIANG Shundong;CHEN Lifeng(School of Petroleum Engineering,Yangtze University,Hubei Provincial Key Laboratory of Oil and Gas Drilling and Production Engineering,Wuhan 430100,China)
出处
《石油化工》
北大核心
2025年第8期1140-1146,共7页
Petrochemical Technology
基金
国家自然科学基金“原位矿化凝胶高温碳酸盐岩水湿界面黏附机制研究”项目(52374028)。
关键词
欠注现象
黏土稳定剂
敏感性
动态耐冲刷性
适用条件
under-injection
clay stabilizer
sensitivity
dynamic erosion resistance
applicable conditions
