In this study the crystallization behavior of n-paraffins in the waxes has been studied using X-ray diffractometry and photomicrography. The effects of solvents and of a pour-point depressant additive on the lattice properties of the waxes have been investigated and the mechanisms of gel formation and additive action have been studied. In this article we show how to obtain wax diffusivity and solubility values in crude oils from deposition measurements . Providing a rather accurate knowledge of such quantities is of great importance in predicting the wax deposition rate in pipelines. In...

Asphaltene precipitation is a sophisticated issue in the upstream oil industry, worldwide, and has detrimental effect on a verity of production processes in oilfields; it damages the properties of the reservoir and causes an unfavorable and significant decrease in oil production. Many oil reservoirs encounter asphaltene precipitation as a major problem during natural production. It is desirable to predict and investigate the precipitation behavior of asphaltene in different pressure temperature conditions. In spite of numerous studies to predict asphaltene behavior, the effect of temperature...