超稠油物性及其与CO_2相互作用机理研究  

PHYSICAL PROPERTY OF SUPER-HEAVY OIL AND THE MECHANISM ANALYSIS OF THE INTERACTION WITH CO_2

作　　者：欧阳传湘[1,2] 杜晓霞[1,2] 

机构地区：[1]油气钻采工程湖北省重点实验室 [2]长江大学石油工程学院

出　　处：《钻采工艺》2010年第4期90-93,141,共4页Drilling & Production Technology

摘　　要：针对辽河油田超稠油黏度高、开发难度大,提出三元复合吞吐开采超稠油的方法。在研究辽河油田超稠油物性、组份组成及流变特性的基础上,测定了CO2在超稠油中的溶解度及CO2在不同含水率时的溶解度,探讨了不同温度压力下含CO2超稠油的黏度的变化规律。研究结果表明,超稠油黏度随温度升高大幅下降,黏度随剪切速率增大而降低。当剪切速率达到一定数值时,黏度趋于常数。在油、水体系中,超稠油中所溶CO2的比例随着压力升高而增大,随含水率的增大而下降。超稠油溶解CO2后,黏度大幅度下降,压力越大,黏度下降幅度越大;温度越高,黏度下降幅度越小。Because it is difficult to exploit the super-heavy oil reservoir in Liaohe Oilfield for its higher viscosity and less effective,the method of ternary combination huff-puff of super-heavy oil is proposed. On the basis of the physical property,composition and rheological properties of super-heavy oil in Liaohe Oilfield,the CO2 solubility in super-heavy oil and the solubility with different water cut was measured. The variation of viscosity of super-heavy oil dis-solved by CO2 under different pressure and temperature was ana-lyzed. The results showed that the viscosity of super-heavy oil was decreased significantly with increasing temperature,and it decreased with increasing shear rate. When the shear rate reached a certain value,the viscosity tends to constant. In the oil-water system,the radio of the dissolved CO2 in super-heavy oil increased as the in-creasing of the pressure,and decreased as the increasing of moisture content. After super-heavy oil dissolved CO2 and pressure increas-ing,the viscosity decreases significantly; the larger the pressure is,the sharper the viscosity drops; the higher the temperature is,the smaller the viscosity drops.

关 键 词：超稠油 三元复合吞吐 CO2 溶解度 黏度 

分 类 号：TE345[石油与天然气工程—油气田开发工程]