Abstract: The present invention includes a method for thermodynamic modeling of asphaltene precipitation comprising: calculating the Gibbs free energy for the transition between asphaltene molecules in solution into an imaginary crystalline asphaltene nanoaggregates or asphaltene nanocrystals; calculating the Gibbs free energy for the transition between asphaltene nanoaggregates or nanocrystals redissolving into colloidal asphaltene nanoaggregates using the computer: and predicting asphaltene solubility in a solvent, wherein the predicted asphaltene solubility is used to add a solvent to a liquid, semi-solid, or solid comprising aspahaltenes to prevent, e.g., fouling of a wellbore, pipeline, downstream unit operations, to provide flow assurance for crude oil pipeline network, or for petroleum crude blending.