Abstract This study introduces a comprehensive and cost-effective approach to diagnose treat the asphaltenes precipitation problems in different downhole conditions. The proposed has been successfully applied two oil wells (Well-I, Well-II) located Western Desert of Egypt. produce moderate high gravity with low content using Electrical Submersible Pumps (ESP). In such operating conditions, soli...

In this study, surfactants were used to enhance heavy oil–solid separation, and a detailed mechanism was explored by SARA (saturates, aromatics, resins, asphaltenes) analysis, element AFM measurement, molecular dynamic simulation. Surfactants could effectively decrease oil/solid interaction force then separation would be enhanced. The interactive in relation concentration, pH value, asphaltene ...

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...

In this work we investigated the behavior of methane hydrates dispersed in crude oils from different fields at temperatures below 0°C. In case of crude oil emulsion the size of water droplets is in the range of 50÷100μm. The size of hydrate particles formed from droplets is the same. The self-preservation is not expected in this field. However, the self-preservation of hydrates with the size of...

We apply a cubic-plus-association equation of state to study the asphaltene precipitation from n-alkane diluted model solutions (asphalteneþtoluene), and heavy oils and bitumens. Heavy oils and bitumens are characterized in terms of saturates, aromatics/resins, and asphaltenes; n-alkanes are treated independently. The asphaltene precipitation is modeled as liquid-liquid phase equilibrium. The s...

Recent research shows that macro-scale cracking in asphalt binder may originate from its intrinsic defects at the nano-scale. In this paper, a molecular dynamics (MD) simulation was conducted to evaluate the nucleation of natural defects in asphalt. The asphalt microstructure was modeled using an ensemble of three different types of molecules to represent a constituent species: asphaltenes, nap...

Исследованы физико-химические свойства, групповой химический и структурно-групповой состав нефтей месторождений Карсовай Гремиха, а также стабилизационного слоя промысловой водонефтяной эмульсии, образованной нефтью месторождения Гремиха. Выделены изучены методами ИК Фурье спектроскопии, 13С 1Н ЯМР спектроскопии смолы асфальтены из исследуемых межфазного ВНЭ, выявлены особенности их элементного...