The previous viscosity reduction methods

In fact, common heavy oil deposits are richer in compounds with at least sixty carbon atoms, in addition to heterocyclic derivatives. These mixtures resulted to high physico-chemical characteristics such as viscosity, boiling points and molecular weight [5] and [6]. The properties also in return posed serious recovery difficulties. The mobility of the oil is seriously restricted, and therefore displacement by simple fluids like water or gas became inefficient [7].