摘要
在CCUS背景下,超临界CO_(2)(SC-CO_(2))在油气领域应用愈发广泛。然而,目前SC-CO_(2)与水、岩石相互作用的基础研究仍相对薄弱。为明确不同温压条件下SC-CO_(2)对低渗致密砂岩储层岩石矿物成分及润湿性的影响规律。文章开展了不同温度、压力及反应时间下SC-CO_(2)-水-岩反应实验及接触角测试实验。研究表明:不同矿物SC-CO_(2)-水-岩的反应敏感性有显著差别,矿物组分变化伴有温度、压力依赖性。接触角测试实验表明:随着压力升高,反应过程中岩心的水接触角呈现先缓慢上升后下降再上升的趋势,随着反应温度的增加接触角呈现出近似线性的降低趋势,岩心润湿性会向中性润湿甚至是油湿方向变化。
Under the context of CCUS,supercritical CO_(2)(SC−CO_(2))has been increasingly applied in the oil and gas industry.However,fundamental research on the interactions among SC−CO₂,water,and rock remains relatively limited.To clarify the influence of SC−CO_(2)on the mineral composition and wettability of low−permeability tight sandstone reservoir rocks under varying temperature and pressure conditions,this study conducted SC−CO_(2)−water−rock reaction experiments and contact angle measurements under different temperatures,pressures,and reaction durations.The results indicated significant differences in the reactivity of various minerals during SC−CO_(2)−water−rock interactions,with mineral dissolution/precipitation exhibiting temperature-and pressure-dependent characteristics.Furthermore,contact angle tests revealed that as pressure increased,the water contact angle of rock cores during the reaction process initially rose slowly,then decreased,and subsequently increased again.In contrast,higher reaction temperatures led to an approximately linear reduction in contact angles,causing a shift in rock wettability toward neutral wettability or even oil−wet conditions.
作者
彭成勇
程宇雄
武广瑷
贾虎
吴百烈
王黎
姜浒
高浩岚
PENG Chengyong;CHENG Yuxiong;WU Guang′ai;JIA Hu;WU Bailie;WANG Li;JIANG Hu;GAO Haolan(State Key Laboratory of Offshore Oil and Gas Exploitation,Beijing 100020,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China)
出处
《钻采工艺》
北大核心
2025年第4期197-203,共7页
Drilling & Production Technology
基金
中国海洋石油“十四五”重大科技项目“海上CO_(2)驱油高效开发技术及示范工程”(编号:KJGG-2022-12-CCUS-0203)
四川省自然科学基金重点项目“基于机器学习分子设计的分离膜增稠CO_(2)无水控水压裂液体系构筑”(编号:2025ZNSFSC0029)。
关键词
超临界CO_(2)
温压
矿物组分
润湿角
溶蚀作用
supercritical CO_(2)
temperature and pressure
mineral composition
wetting angle
dissolution
