摘要
对选择性吸附的机理进行分析,认为储集岩和原油之间的选择性吸附机理可归结为储集岩矿物与原油极性组分间化学键力的形成。同时对选择性吸附所带来的宏观及微观地质效应进行总结,认为储层润湿性反转主要由非烃、沥青质与矿物之间的选择性吸附引起,而选择性吸附对有机包裹体的形成及组分的影响表现为:一方面导致油包裹体相对富集极性有机化合物,使得被封存在包裹体中的原油组分并不能完全反映同期同源的原油组分;另一方面被选择性吸附到石英表面的有机酸可以溶蚀石英表面促使孔洞产生和裂隙扩大,从而有利于有机包裹体的形成。
This paper analyzes the mechanism of the preferential adsorption between reservoir rocks and crude oil. The mechanism of this adsorption can be boiled down to the formation of chemical bonds between reservoir rock mineral and polar compounds in crude oil. This paper also discusses the macroscopic and microscopic geologic effects because of preferential adsorption. It is considered that reservoir wettability alteration is mostly caused by preferential adsorption among non-hydrocarbon,asphalt and reservoir minerals. The impacts of preferential adsorption on the formation of organic inclusion and its composition shows on two aspects: on the one hand,it causes polar components enriched in the oil inclusions so that the oil components in the inclusions can’t fully reflect the homologous oil components; on the other hand,the organic acid that is preferentially adsorbed on quartz surface can dissolve quartz surface and produce and enlarge pores and fissures,thereby helpful to the formation of organic inclusion.
出处
《特种油气藏》
CAS
CSCD
2010年第5期13-18,共6页
Special Oil & Gas Reservoirs
基金
油气资源与探测国家重点实验室(中国石油大学)开放研究基金(2009008)资助
关键词
原油组分
选择性吸附
极性
地质效应
oil component
preferential adsorption
polarity
geologic effect
