... The objective of this experiment was to evaluate our Asphaltene Solvent System by performing a dissolution test, wettability test, and stability test to compare with the actual Xylene system and review the advantages and properties of the new system. This solvent system can be tailored...

... the impact of asphaltene precipitation on viscosity. The impact is in part indirectly captured through the general curve-fitting of the data. For some of the mixtures in the database molecular weights had to be estimated since they were not provided in the references. This may somewhat increase...

... Using optical microscopy to detect asphaltene " onset" is another popular category to study asphaltene kinetics. One way to study onset is preparing a matrix of oil and heptane mixtures at fixed ratios and ageing. Samples can be taken over time and for the first observable asphaltene particle...

... The results from the first AFM (and STM) imaging of asphaltenes confirmed that island architecture dominates.[ 48 , 51 ] A second molecular architecture, ‘aryl-linked core’ where two fused aromatic ring systems are linked with an aryl bond, thus still preserving an aromatic core, was also...

... processes that occurred in the reservoir. Methods of reservoir fluid geodynamics are used to assess the extent of fluid compositional equilibrium, especially the asphaltenes, and thereby the extent of connectivity in these facies. Geochemical determinations are shown to be consistent with measurements...

... During each test, produced liquids were collected every 20 minutes and then, water is separated from samples through evaporation (Kar et al. 2015) . The amount of asphaltenes in the produced oil were determinedthrough n-pentane washing (ASTM 2011). Further, the residual oil samples were also...

... laboratory testing flow assurance issue nanoemulsion surfactant fluid compatibility solid deposition treatment crude organic deposit asphaltene completion installation and operations production enhancement well production crude oil chemical treatment rock/fluid interaction emulsion remedial...

...Equilibrium of Light Crude Oil; Asphaltene Molecules Abstract Asphaltenes can be dispersed in crude oils in 3 different forms; molecules, nanoaggregates (of molecules) or clusters (of nanoaggregates); these forms are codified in the Yen-Mullins model and relate to the extent of solvency...

... structure evolution. The Reservoir Fluid Geodynamics (RFG) workflow provides the 1 st -principles description of the dynamics of reservoir fluids in geological time. This workflow enables the identification of the fluid geodynamics processes by integrating of various input including asphaltene gradient...

... on the produced oil samples. It has been observed that the viscosity and density of produced oil were not improved due to emulsion formation which is a common concern for any steam injection project. However, further analysis revealed that emulsion breaking is possible with the use of asphaltene insoluble...

... to the minimum amount of oil ganglia trapped in the reservoir. Asphaltenes are known to create stable emulsion systems but increase visco-elasticity. They positively impact recovery, as a coreflood using an oil with no asphaltenes shows a drop in recovery factor. This demonstrates a need for a balance between...

... Abstract Asphaltene gradient analysis in many wells in a large field match the Flory-Huggins-Zuo Equation of State (FHZ EoS) indicating equilibrated asphaltenes, thus reservoir connectivity. This analysis is consistent with data from over one year of production to date. Reservoir fluid samples...

... Abstract The selection of optimal chemical solutions to an asphaltene challenge has been an integral part of the flow assurance strategy for a large on-shore field in Abu Dhabi. Previous studies in the field have demonstrated good performance by mixing heavy aromatic naphtha with some...

... to fuel ratio compared to those of the other sets of experiments ( Aleksandrov and Hascakir 2015 ). It can be concluded that the asphaltenes require the greatest activation energy. However, they also generate the greatest amount of heat during combustion. The saturates fraction produce a great amount...

... Abstract Asphaltenes stability is a phase behavior phenomenon and affected mainly by the change in pressure and temperature. However, the changes in pressure and temperature lead compositional changes, hence, the dependency of asphaltenes stability on crude oil composition requires more clarity...

..., resins, and asphaltenes (SARA) fractions of initial and produced oil samples were compared. To better understand the fuel formation mechanism, asphaltenes surfaces were visualized by a Scanning Electron Microscope (SEM) and SARA fractions with Fourier Transform Infrared (FTIR). Combustion tube...

... into the oil phase, leading to fast oil expansion after CO 2(sc) injection into the visual cell. PVT measurement solid precipitate Upstream Oil & Gas oil interface chemical flooding methods oil phase mechanism pressure decline asphaltene co 2 psig enhanced recovery oil interaction sight...

... Abstract The stability of asphaltenes is a critical parameter which may affect the flow in porous media significantly. This study investigates the change in the stability of asphaltenes after the interaction of asphaltenes originated from five different reservoirs with reservoir components...

... – 60% paraffin wax and at least 10% microcrystalline wax, 10-56% of the resins and asphaltenes, water, sand and inorganic salts ( Rogachev, 2006 ). Accumulation asphaltene, resin and paraffin deposits (ARPD) on the inner surface of the tubing it is a complex physical-chemical process that depends...

... equilibrated but another component is not equilibrated. For example, it has been shown that in a typically burial sequence with reservoir charging, the asphaltenes can be equilibrated while the thermal maturity markers are not during a significant interval of time.[ Wang et al, 2015 ] As noted above, DFA...