蒸汽驱对低渗透稠油油藏岩心润湿性的影响  

Effect of steam flooding on core wettability of low permeability heavy oil reservoir

作　　者：孙仁远 马自超 张建山 徐婷 刘传喜 

机构地区：[1]中国石油大学,山东青岛266580 [2]中石化勘探开发研究院,北京100080

出　　处：《特种油气藏》2013年第6期69-71,144-145,共3页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项"裂缝-孔隙型碳酸盐岩稠油油藏渗流机理与数值模拟研究"(2011ZX05031-002-007HZ)

摘　　要：采用自行设计的稠油蒸汽驱实验装置,利用Amott方法测定了蒸汽驱前后岩石润湿性的变化,测量了蒸汽驱前后岩心的渗吸采出程度。研究表明:该低渗透碳酸盐岩稠油油藏岩心原始条件下均为亲油岩心,岩心的渗吸采出程度受到低渗透率、原油黏度以及润湿性的影响;蒸汽驱后岩心的亲油性减弱,当岩心的含水饱和度超过40%后,润湿性由亲油变为弱亲油,而且岩心的渗吸采出速度明显增加,达到最终采出程度所用时间减少,渗吸采出程度增加;岩心的润湿性对渗吸最终采出程度和渗吸速度有重要的影响。A self-developed experimental apparatus was applied to measure rock wettability and imbibition recovery before and after steam flooding by Amott method. The experiments show that the core of the low permeability carbonate heavy oil reservoir is initially oil wet,its imbibition recovery is affected by permeability,oil viscosity and rock wettability; after steam flooding,core lipophilicity weakens,when water saturation exceeds 40%,the wettability changes from oil wet to weak oil wet,the imbibition recovery rate increases obviously,and the time needed to reach ultimate recovery shortens; rock wettability has a great effect on imbibition oil recovery factor and production rate.

关 键 词：低渗透 稠油 碳酸盐岩油藏 蒸汽驱 渗吸 润湿性 Amott法 

分 类 号：TE348[石油与天然气工程—油气田开发工程]