杨杰;董朝霞;向启贵;雷宇;胡金燕;彭锋;王兴睿;

• 1:中国石油西南油气田分公司安全环保与技术监督研究院

• 2:中国石油大学(北京)科学技术研究院

• 3:页岩气评价与开采四川省重点实验室

摘要(Abstract)：

根据岩心自渗吸实验及Zeta电位测试结果,在宏观上研究二价阳离子改变砂岩表面润湿性的机理;根据极性模拟油组分在砂岩表面吸/脱附实验和分子模拟结果,在微观上阐释二价阳离子改变砂岩表面润湿性的机理。结果表明:原油中的酸性组分和砂岩表面硅醇基团被电离而带负电,酸性组分主要通过二价阳离子架桥吸附于砂岩表面,并不能通过一价阳离子架桥吸附及范德华力吸附,砂岩表面亲水性减弱;盐水盐度降低使酸性组分、砂岩表面负电性增强,两者静电斥力增大,酸性组分脱附,导致砂岩表面亲水性增强。

关键词(KeyWords)：二价阳离子;吸/脱附;润湿性改变;低盐水驱;砂岩

Abstract:

Keywords:

基金项目(Foundation):国家科技重大专项(2011ZX05052-002)

作者(Author):杨杰;董朝霞;向启贵;雷宇;胡金燕;彭锋;王兴睿;

Email:

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