摘要
确定三元复合驱对储层关键物性特征参数变化的影响程度是保证三元复合驱应用效果的重要前提。利用岩芯驱替及原子力显微镜探测等实验,对大庆油田某区块三元复合驱前后岩芯润湿性、敏感性、孔隙度与渗透率等物性参数的变化规律进行系统评价和分析。相对渗透率测定结果表明三元复合驱后储层岩石润湿性会发生改变,亲油性储层岩芯可反转为亲水润湿性;敏感性实验表明,三元复合体系对储层不同敏感性造成不同影响,主要表现在驱后水敏性增加但速敏性、酸敏性、碱敏性等有所降低。对储层孔渗统计分析表明,三元复合驱后岩芯孔隙度和渗透率绝对值均有所增加,且二者相关性较好;结合原子力显微镜对岩芯微观孔隙结构的观测结果进一步验证了孔渗改善的相关认识。
The important prerequisite ensuring the application effect of ASP flooding is determined by the extent of the impact of characteristic parameters variations of reservoir. The variations of the characteristic parameters such as wettability,sensitivity,porosity,permeability of cores,which were drilled before and after ASP flooding in Daqing Oilfield,are analyzed systematically by core-flooding experiments and AFM. The measurement results of relative permeability show that the wettability of reservoir core will change from oil wet to water wet after ASP flooding. The sensitivity experiments indicate that ASP flooding will lead to different influence on types of sensitivity,mainly including the increase of water sensitivity,but the decrease of sensitivity of velocity,acid and alkali. Statistical analysis of the reservoir porosity and permeability shows that both the absolute value of porosity and permeability of core increase and they relatewell with each other. The observations of AFM for microscopic pore structure of core further validate the understanding of the porosity and permeability improvement.
作者
赵凤兰
李子豪
李国桥
宋兆杰
侯吉瑞
ZHAO Fenglan;LI Zihao;LI Guoqiao;SONG Zhaojie;HOU Jirui(Enhanced Oil Recovery Research Institute,China University of Petroleum(Beijing),Changping,Beijing 102249,China;EOR Applied Basic Theory Research Institute in Low Permeability Oilfields,Key Laboratory of Tertiary Oil Recovery,CNPC,Changping,Beijing 102249,China;Key Laboratory of Petroleum Engineering,China Ministry of Education,Changping,Beijing 102249,China;No.2 Oil Production Company,Daqing Oilfield Limited Company,Daqing,Heilongjiang 163414,China)
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2016年第5期157-164,共8页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
国家重大科技专项示范工程(2011ZX05052)
国家自然科学基金(51174216)
