1. Chen, H., et al.: Saturation assessment of natural flooded heavy oil reservoirs in orinoco belt venezuela. Welllogging Technol. 43(1), 75–79 (2019)
2. Zhang, N.: Visbreaking and rheology of Venezuela extra heavy oil. Appl. Chem. Indust. 44(10), 1844–1848 (2015)
3. Lante, C., Manuel, F.G., Pedro, P.A.: Characterization of Athabasca vacuum residue and its visbroken products: Stability and fast hydrocarbon group-type distributions. Energy Fuels. 21, 1631–1639 (2007)
4. Xian, S., et al.: Experimental study of improving the recovery in ultra-heavy oil reservoir after dissolved gas drive. Petrol. Geol. Recov. Effic. 22(1), 98–101 (2015)
5. Mu, L., Han, G., Xu, B.: Geology and reserve of the Orinoco heavy oil belt. Venezuela. Petrol. Explor. Dev. 36(6), 784–789 (2009)