塔河油田超稠油混合掺稀降黏实验研究

摘要

塔河油田超稠油的开采关键在于降黏,实践证明掺稀降黏是塔河超稠油开采的有效方法,但稀油与稠油在井底混合均匀程度不高,使得降黏效果与室内实验差距较大.研究发现,在掺稀油时掺入少量混合芳烃可提高掺稀降黏效果.实验结果表明,在静态下混合芳烃对塔河超稠油有良好的溶解能力,掺入混合芳烃能够显著降低超稠油黏度,且降黏效果好于单一掺稀油效果,同时又可节约稀油资源.%Viscosity reduction is critical to recovery of super heavy oil from Tahe Oilfield. Blending light oil has been proved to be effective for producing Tahe super heavy oil. However, the degree of blending evenness between light oil and heavy oil in bottom hole is low, resulting in a big difference in viscosity reduction result from that of laboratory experiment. The study has found that the viscosity reduction effect can be improved by adding a little aromatic hydrocarbon admixture into the system when blending light oil into heavy oil. The experiment result indicates that aromatic hydrocarbon admixture has a good dissolving capacity to Tahe super heavy oil under static condition, it can greatly reduce viscosity and the effect of viscosity reduction is much better than blending light oil alone, thus saved light oil resource.