摘要
论述了国内外化学驱油剂色谱分离的研究现状 ,提出了三元复合体系色谱分离的研究方法。在天然油砂充填的填砂管模型中进行了三元复合体系的流动实验 ,研究了渗透率对三元复合体系色谱分离的影响。三元复合体系在天然油砂充填的多孔介质中流动时化学剂间发生色谱分离现象 ,渗透率越低 ,色谱分离程度越明显。用天然岩心研究了渗透率对三元复合体系中表面活性剂滞留量和驱油效果的影响。当三元体系注入量为 0 .6PV时 ,多孔介质的渗透率越低 ,则表面活性剂在岩心中的滞留量越大。三元复合驱在中渗透率岩心中提高原油采收率的幅度最大。
The chromatographic separation(CS) of components in a practical ASP flooding solution is investigated through constructing for every component curves relative concentration vs flown volume through long oily sand packs of different permeability at 45℃ and determining breakthrough point(in PV) and equal ralative concentration point(in PV). It is shown that CS is observed in all cases and the lower the permeability of the sand pack, the more serious the extent of CS. In reservoir core flooding experiments at 45℃ it is found that the lower the core permeability the higher the retention of surfatant(a petroleum sulfonate in ASP system) is ; the highest oil recovery is observed in the core of medium permeability.
出处
《油田化学》
CAS
CSCD
北大核心
2000年第2期164-167,共4页
Oilfield Chemistry
关键词
三元复合驱油
色谱分离
表面活性剂
油田
渗透率
ASP flooding Solution
Chromatographic Separation of Chemicals
Surfactant
Retention
Sandstone Cores
Daqing Oil Fields
