Intensified Viscosity Reduction of Heavy Oil by Using Reservoir Minerals and Chemical Agents in Aquathermolysis
Through laboratory experiments with samples from Daqing and Liaohe oilfields, the effects of reservoir mineral,NiSO4 and tetrahydronaphthalene (THN) were investigated in the aquathermolysis (AT) of heavy oi1. The results indicate that, in contrast with simple AT, the addition of reservoir minerals leads to lower average molecular weight, higher contents of saturated and aromatic hydrocarbon and lower contents of resin and asphalting, and the viscosity reduction ratio of the two oi1 samples increases from 7.41% and 12.95% to 16.05% and 25.29% respectively, which means that reservoir minerals can catalyze the AT of heavy oi1.With the addition of NiSO4 and THN into the reaction system, the average molecular weight of the reaction products decreases further, the contents of saturated and aromatic hydrocarbon increase and the contents of resin and asphalting decrease further, the viscosity decreases greatly with a reduction ratio as high as 84.39%.
Zhong Cao, Yinghe He, Lixian Sun and Xueqiang Cao
Q. Y. Chen et al., "Intensified Viscosity Reduction of Heavy Oil by Using Reservoir Minerals and Chemical Agents in Aquathermolysis", Advanced Materials Research, Vols. 236-238, pp. 839-843, 2011