... Abstract Recent studies revealed that field deposits collected from production tubing of offshore wells often exhibit compositional varieties pointing to a more complex fouling process under field operations than original predictions purely based on asphaltene instability. Asphaltenes...

... Abstract Precipitation and deposition of hydrocarbon solids such as asphaltenes and wax are some of the major challenges facing the oil and gas processing and transportation industry. Deep-water, high pressure and high temperature (HPHT) environment are currently being explored for meeting...

... oil emulsion collected data. The results indicate that there are four oil wells of a different physical property could be very helpful for our study. Such properties include emulsion viscosity, size of water droplets, surface active materials, resin to asphaltene ratio (R/As), emulsion temperature...

... tubing, pipelines etc. and possible problems that may arise because of viscosity changes due to precipitation of solids such as wax and/or of asphaltene. To determine the contaminating components that affect plant design such as the mercury content, sulphur components and radioactive components...

... Ratio @ bp. 140.35 Std. m 3 /std. m 3 Initial Asphaltene content, % 1.24 Initial Sulfur content, % 0 Core Flooding Apparatus The core flooding apparatus employed in this study consists of two fluid accumulators connected to a variable rate injection pump. The core holder...

... joshi production chemistry onset wax remediation hydrate inhibition nighswander hydrate remediation upstream oil & gas remediation of hydrates oilfield chemistry reservoir temperature scale remediation optical density asphaltene flocculation particle size asphaltene...

... It has to be mentioned that asphaltene deposition occurred in the field when solvents are used to displace oil in Enhanced Oil Recovery processes. A variety of solvents have been used (e.g., natural gas liquids, liquefied petroleum gas, natural gas and carbon dioxide 11 ); Acidizing operations...

... apparent severe productivity drop coupled with downhole temperature rise, and the investigations eventually led to the discovery of asphaltene that has not been found in the field before. Analysis of all the problems and investigations including lessons learnt are shared in detail. investigation...

... Abstract The precipitation or block of asphalts, asphaltene and other or-ganics in the porous media near the wellbole will reduce per-meability due to change in temperature, pressure and compo-sitions of reservoir oil. Injection of organic aromatic solvents and soaking is one feasible method...

... Abstract This paper describes a procedure for matching PVT data of a typical oil that includes asphaltene precipitation data. The fluid PVT data are from constant composition expansion, differential liberation and separator test experiments. The experimental precipitation data consist...