| Reversible adsorption of carbon dioxide on amine surface-bonded silica gel O Leal, C Bolívar, C Ovalles, JJ García, Y Espidel Inorganica Chimica Acta 240 (1-2), 183-189, 1995 | 437 | 1995 |
| Heavy oil based mixtures of different origins and treatments studied by atomic force microscopy B Schuler, S Fatayer, G Meyer, E Rogel, M Moir, Y Zhang, MR Harper, ... Energy & Fuels 31 (7), 6856-6861, 2017 | 253 | 2017 |
| Opportunities of downhole dielectric heating in venezuela: three case studies involving medium, heavy and extra-heavy crude oil reservoirs C Ovalles, A Fonseca, A Lara, V Alvarado, K Urrecheaga, A Ranson, ... SPE International Thermal Operations and Heavy Oil Symposium, SPE-78980-MS, 2002 | 138 | 2002 |
| Anionic Group 6B metal carbonyls as homogeneous catalysts for carbon dioxide/hydrogen activation. The production of alkyl formates DJ Darensbourg, C Ovalles Journal of the American Chemical Society 106 (13), 3750-3754, 1984 | 131 | 1984 |
| Asphaltene stability in crude oils and petroleum materials by solubility profile analysis E Rogel, C Ovalles, M Moir Energy & fuels 24 (8), 4369-4374, 2010 | 119 | 2010 |
| Use of CO2-Triggered Switchable Surfactants for the Stabilization of Oil-in-Water Emulsions C Liang, JR Harjani, T Robert, E Rogel, D Kuehne, C Ovalles, V Sampath, ... Energy & fuels 26 (1), 488-494, 2012 | 104 | 2012 |
| Use of a dispersed iron catalyst for upgrading extra-heavy crude oil using methane as source of hydrogen☆ C Ovalles, E Filgueiras, A Morales, CE Scott, F Gonzalez-Gimenez, ... Fuel 82 (8), 887-892, 2003 | 95 | 2003 |
| Homogeneous catalysts for carbon dioxide/hydrogen activation. Alkyl formate production using anionic ruthenium carbonyl clusters as catalysts DJ Darensbourg, C Ovalles, M Pala Journal of the American Chemical Society 105 (18), 5937-5939, 1983 | 90 | 1983 |
| Anionic group 6 hydrides and carboxylates as homogeneous catalysts for reduction of aldehydes and ketones PA Tooley, C Ovalles, SC Kao, DJ Darensbourg, MY Darensbourg Journal of the American Chemical Society 108 (18), 5465-5470, 1986 | 88 | 1986 |
| Process for the downhole upgrading of extra heavy crude oil C Vallejos, T Vasquez, C Ovalles US Patent 5,891,829, 1999 | 85 | 1999 |
| The residual oil saturation determination for Steam Assisted Gravity Drainage (SAGD) and Solvent-SAGD T Kar, C Ovalles, E Rogel, J Vien, B Hascakir Fuel 172, 187-195, 2016 | 75 | 2016 |
| Downhole upgrading of extra-heavy crude oil using hydrogen donors and methane under steam injection conditions C Ovalles, C Vallejos, T Vasquez, I Rojas, U Ehrman, JL Benitez, ... Petroleum science and technology 21 (1-2), 255-274, 2003 | 69 | 2003 |
| Sediment formation in residue hydroconversion processes and its correlation to asphaltene behavior E Rogel, C Ovalles, A Pradhan, P Leung, N Chen Energy & fuels 27 (11), 6587-6593, 2013 | 62 | 2013 |
| Determination of asphaltenes in crude oil and petroleum products by the on column precipitation method E Rogel, C Ovalles, ME Moir, JF Schabron Energy & fuels 23 (9), 4515-4521, 2009 | 61 | 2009 |
| Characterization of heavy crude oils, their fractions, and hydrovisbroken products by the asphaltene solubility fraction method C Ovalles, E Rogel, M Moir, L Thomas, A Pradhan Energy & fuels 26 (1), 549-556, 2012 | 60 | 2012 |
| Asphaltene chemical characterization as a function of solubility: effects on stability and aggregation E Rogel, C Ovalles, M Moir Energy & fuels 26 (5), 2655-2662, 2012 | 59 | 2012 |
| Use of a dispersed molybdenum catalyst and mechanistic studies for upgrading extra-heavy crude oil using methane as source of hydrogen C Ovalles, E Filgueiras, A Morales, I Rojas, JC de Jesus, I Berrios Energy & Fuels 12 (2), 379-385, 1998 | 59 | 1998 |
| Effect of asphaltene characteristics on its solubility and overall stability A Prakoso, A Punase, E Rogel, C Ovalles, B Hascakir Energy & Fuels 32 (6), 6482-6487, 2018 | 57 | 2018 |
| Effect of precipitating conditions on asphaltene properties and aggregation LC Ortega, E Rogel, J Vien, C Ovalles, H Guzman, F Lopez-Linares, ... Energy & Fuels 29 (6), 3664-3674, 2015 | 56 | 2015 |
| Upgrading of extra-heavy crude oil by direct use of methane in the presence of water: deuterium-labelled experiments and mechanistic considerations C Ovalles, A Hamana, I Rojas, RA Bolívar Fuel 74 (8), 1162-1168, 1995 | 56 | 1995 |
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