油藏埋存条件下CO2/原油体系的界面张力和黏度研究

Researches on interfacial tension and viscosity of CO2 and crude oil system have significant influence on exploring mechanism of CO2 sequestration and flooding, evaluating the potential of CO2 sequestration and building an integrity flow mechanism of CO2 and crude oil system. This project is going to conduct the following researches. Firstly, an experimental equipment and system should be developed to measure the density, interfacial tension and viscosity of multicomponent mixtures under reservior pressure. Secondly, interfacial tension and viscosity experiments should performed systematically for the mixture system between the CO2 and typical component of the crude oil including alkane, cyclo alkane, and aromatic hydrocarbon. Subsequently, the same experiment will also conducted on the CO2 and crude oil system. These work will replenish the shortage of the existing data. Lastly, based on the physcial properties, the relationship between crude oil and hydrocarbons should be constructed. After that a theoretical model of interfacial tension and viscocity for CO2 and crude oil system should be built. With the research of this project, the experimental data and prediction model of interfacial tension and viscosity for the CO2 and crude system should obtained, which provide the basis data and theoretical support for the CO2 sequestration and resource utilization. This project can enhance the interfacial tension and viscosity measurement level of high presure and multi-mixture fluid. Furthermore, it also improve the international influence in the area of thermophysical property research.

开展CO2/原油体系的界面张力和黏度研究对于评价CO2埋存能力、揭示CO2埋存和驱油机理、建立与完善CO2/原油体系渗流规律等方面具有重要的作用。本项目计划开展以下工作：研制适用于高压条件下、多元混合工质的密度、界面张力和黏度实验装置及系统；利用新研制的系统开展几种组成原油的典型烷烃、环烷烃、芳香烃与CO2混合物体系及CO2/原油体系的界面张力和黏度实验研究，补充现有数据不足及空白；基于物性构建原油与烃类组分物质之间的关系模型，并建立适用于CO2/原油体系的界面张力和黏度理论预测模型；通过本项目的研究，不仅可以获得CO2/烃类、CO2/原油的界面张力和黏度实验数据和预测模型，同时也有助于提高和推动高压、多元混合工质的界面张力和黏度测试水平和理论模型研究进展，为CO2的埋存和资源利用提供基础数据和理论支持。

开展CO2/原油体系的界面张力和黏度研究对于评价CO2埋存能力、揭示CO2 埋存和驱油机理、建立与完善CO2/原油体系渗流规律等方面具有重要的作用。本项目按照既定的研究目标，围绕CO2/烷烃体系、典型原油组分的界面张力和黏度性质展开了实验和理论研究工作，取得的重要成果包括：研制了一套悬滴法界面张力实验系统、振动管密度和振动弦黏度联用系统及表面光散射表面张力和黏度实验系统，可以实现高温高压下密度、界面张力和黏度的高精度测量；利用研制的实验系统，实验获得了C10H22、C12H26、C10H22/C12H26、CO2/C10H22、CO2/C12H26和CO2/C10H22/C12H26的密度、界面张力和黏度数据，获得了邻二甲苯、间二甲苯、乙苯、琥珀酸二乙酯、乙酸异辛酯及乙二醇甲醚乙酸酯的密度和表面张力实验数据，补充现有数据不足及空白；收集了已公开发表的CO2/烃类体系的黏度实验数据，建立了CO2/烷烃体系的VW理论黏度模型；基于双参考流体对比态原理，提出了一种改进型表面张力预测模型，可以较精确的预测计算制冷剂、烷烃及其混合物的表面张力。本项目的研究为CO2的埋存和资源利用提供了基础数据和理论支持。.截至到目前为止，共发表论文34篇，其中SCI收录11篇，EI收录19篇，国际会议报告6篇。共培养博士研究生1名，硕士研究生3名，在读博士生4名，硕士生1名。课题负责人升为教授。在基金的支持下，项目负责人和主要成员参加了第20届欧洲热物性会议、第24届国际制冷大会和第11届亚洲热物性会议，并宣读论文。