Asphaltenes are known to cause problems related flocculation, precipitation, and plugging, either in the formation, production lines, processing equipment. Different models have been proposed predict thermodynamic conditions under which asphaltenes precipitate over past years. This work analyses performance of various on their capability match literature experimental data precipitated asphalten...

In this work the likelihood of asphaltene deposition problems during dynamic displacement of oil by natural gas in unconsolidated porous media is experimentally inspected. The two different rock materials, limestone and sandstone, are used as a representative of porous media. Dynamic flow experiments indicate that the increase of natural gas injection increases asphaltene deposition in the unco...

When oil is mixed with light alkanes, asphaltenes can precipitate out of oil solutions in a multistep process that involves the formation of nano and colloidal scale particles, the aggregation of asphaltene colloids, and their eventual sedimentation. Amphiphilic dispersants can greatly affect this process. The mechanism of the dispersant action in colloidal asphaltene suspensions in heptane has...

Asphaltene precipitation and deposition can occur at both the surface subsurface levels, leading to formation of organic-based scales. also lead changes in petrophysical properties such as wettability, which affects ultimate recovery. is linked fluid composition driven by pressure drawdown temperature variation across reservoir. Thus, asphaltene adversely influence Thermal recovery methods are ...

Asphaltenes are known as the 'cholesterol' of crude oil. They form nano-aggregates, precipitate, adhere to surfaces, block rock pores and may alter the wetting characteristics of mineral surfaces within the reservoir, hindering oil recovery efficiency. Despite a significant research effort, the structure, aggregation and deposition of asphaltenes under flowing conditions remain poorly understoo...