Abstract:

Oil with high freezing point is different in flowing properties at different temperatures,resulting in a series of difficulties in waterflood development of oilfields.To solve the problem,with experimental results and an integration of geological modeling and reservoir numerical simulation,we analyze the temperature field distribution in the reservoir at different surface temperatures of injected water.It is found that 60℃ is an important critical temperature.Over 60℃,the crude oil is a Newtonian fluid,with no wax crystallization and lower viscosity.The study results also show that the surface temperature of injected water at 80℃ is the best in waterflood development effects.Furthermore,the temperature field distribution among wells and its prediction were also analyzed,which provided guidance for the plan optimization of high freezing-point reservoirs in improving development and enhancing oil recovery.

Key words: freezing point, numerical simulation, temperature field, oil with high freezing point, Liaohe oilfield