Key refinery technologies for upgrading of heavy oils feasible to be combined to increase yield and quality of upgraded oil are reviewed and analyzed. Hydrogen addition and carbon rejection based technologies are described to establish their current situation for heavy oil and residue upgrading. Various integrations of upgrading processes were identified in the literature and others have been proposed, which include deasphalting, gasification, delayed coking, RFCC, ebullated-bed hydrocracking, slurry-phase hydrocracking and fixed-bed hydrotreating. The main advantages of the integrated process schemes were highlighted in terms of product yields, quality of products, elimination of low-value by-products and reduction of impurities. (C) 2012 Elsevier Ltd. All rights reserved.