asphaltene

At least some of the substantially asphaltene-free, and metal-free distillate fraction is converted to a hydrogen donor diluent.

The results show that in the initial phase of reaction, coal is mainly converted to preasphaltene, asphaltene and a little oil and gas.

After aging, asphaltene content increased, resins and aromatics content decreased as well as saturate content.

The influence of different resin sub-fractions on the stability of the oil-water interface stabled by asphaltene sub-fractions is different.

With the asphaltene precipitation, the rock permeability reduces correspondingly.

However, gas injection for enhancing oil recovery may cause asphaltene deposit, which seriously influences production.

The heavy oil must contain a certain amount of original asphaltene to form a core with high compression strength.

After modification the content of heptene soluble and toluene insoluble was decreased , the content of asphaltene was increased.

The results also showed that the saturate and aromatic increased, resin asphaltene decreased. . .

With the extend of time, the yield of preasphaltene and asphaltene reaches the maximum and the yield of oil and gas gradually increases.

After hydrothermal catalytic pyrolysis reaction of heavy oil, the stability of asphaltene became worse.

Treatment with the methods of this invention reduces asphaltene deposits and sludges.

During petroleum thermal conversion, asphaltene yields coke via the second liquid phase and the carbonaceous mesophase.

The influence of dilatational frequency on the stability of interfacial films stabled by asphaltene sub-fractions is slightly.

To under- stand better the adsorption progress of petroleum asphaltene must see the whole adsorption behavior of asphaltene.

Asphaltene content increased, the deterioration of oil quality.

Due to high colloid and asphaltene content, the viscosity of heavy oil is high.

Others: crude oil asphaltene content of less than 1% in general.

Therefore, controlling the formation of asphaltene is important to asphalt aging resistance.

A technique for modeling asphaltene precipitation in oil.

Adsorption and Precipitation Mechanism of Petroleum Asphaltene and its Influence Factors

the crude oil were higher content of asphaltene , the higher the rate of core permeability damage;

Asphaltene structure in reservoir affected by discharge of secondary condensate oil: laboratory simulation

Precipitation condition of crude asphaltene and its controlling

Influence of petroleum sulfonate on interfacial properties of crude oil, resin and asphaltene from Shengli Oilfield

Phase behavior and equilibrium in asphaltene precipitation process with antisolvent

Asphaltene Deposition Problems in Oil Industry with Focus on Electric Submersible Pump Applications

Isolation of Viscous-Oil Degradative Microorganism and Biodegradation to Resin and Asphaltene

Experiment on precipitation amount and mechanism of asphaltene in high-pressure gas injection process

Mechanism and Evaluation of Formation Damage Induced by Deposition and Adsorption of Crude Asphaltene

Formation Damage Induced by Asphaltene Deposition and Measures for Damage Prevention and Removal

Evaluation and Control of Formation Damage Induced by Crude Asphaltene Precipitation

Measuring the Asphaltene Content in Viscous Crude by Double-Wave Length Spectrophotometry

Evaluation of the Dispersivity of Various Oil Sulfonates to Crude Asphaltene

Effect of Molecular Parameters of Asphaltene and Resin from Saudi Arabia Crude Oil on Oil-water Interfacial Properties

Processing and Performance Evaluation of Paving Asphalt from High Asphaltene Tahe Crude Oil

The Effects of Stabilizers on Viscosity of Petroleum Asphaltene Solutions

Adsorption characteristics of asphaltene on silica sand and wettability by SEM

Macro-Size of Asphaltene Colloidal Particles in Organic Solvents

Hydrocarbons Entrapped in the Petroleum Asphaltene

Asphaltene precipitation model and plugging model

gas with high injection pressure can decrease the rudimental asphaltene in core;

A New Method to Characterize the Size and Shape Dynamics of Asphaltene Deposition

A Study on Inhibitors and Removers for Asphaltene Deposits from Heavy Crude Oils

Research of Asphaltene Plugging Mechanism in Porous Media

Study on the molecular structure of asphaltene fraction from the Shenhua coal direct liquefaction residue

Prediction of Asphaltene Initial Precipitation Pressure and Temperature for Well 8010 in Kenjiyak Oilfield

Molecular size and micellar particle size of asphaltene in vacuum residues

Occurrence of organic acids in asphaltene and resins

Asphaltene Stability in Crude Oils