ASPHALTENE PRECIPITATION AND SOLVENT PROPERTIES OF CRUDE OILS

摘要: ABSTRACT Improved prediction of the onset asphaltene precipitation may be achieved using refractive index (RI) to characterize crude oils and their mixtures with precipitants solvents. Experimental measurements RI for several precipitant n-heptane, are reported at ambient conditions. Theoretical developments described that will permit extension these observations reservoir conditions Measurements RJ have shown occurs a characteristic each oil/ combination, supporting premise is dominated by London dispersion interactions thus, can used predict precipitation. Reports in literature showing constant solvent-to-precipitant ratios provide additional confirmation The theory developed on assumption forces dominate aggregation asphaltenes. i...