Experimental study of blending light oil to reduce super heavy oil viscosity in Tahe Oilfield

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.